Sorting algorithms/Patience sort
Sort an array of numbers (of any convenient size) into ascending order using Patience sorting.
You are encouraged to solve this task according to the task description, using any language you may know.
Sorting Algorithm
This is a sorting algorithm. It may be applied to a set of data in order to sort it.
For comparing various sorts, see compare sorts.
For other sorting algorithms, see sorting algorithms, or:
Heap sort | Merge sort | Patience sort | Quick sort
O(n log2n) sorts
Shell Sort
O(n2) sorts
Bubble sort |
Cocktail sort |
Cocktail sort with shifting bounds |
Comb sort |
Cycle sort |
Gnome sort |
Insertion sort |
Selection sort |
Strand sort
other sorts
Bead sort |
Bogo sort |
Common sorted list |
Composite structures sort |
Custom comparator sort |
Counting sort |
Disjoint sublist sort |
External sort |
Jort sort |
Lexicographical sort |
Natural sorting |
Order by pair comparisons |
Order disjoint list items |
Order two numerical lists |
Object identifier (OID) sort |
Pancake sort |
Quickselect |
Permutation sort |
Radix sort |
Ranking methods |
Remove duplicate elements |
Sleep sort |
Stooge sort |
[Sort letters of a string] |
Three variable sort |
Topological sort |
Tree sort
- Related task
AArch64 Assembly
<lang AArch64 Assembly> /* ARM assembly AARCH64 Raspberry PI 3B */ /* program patienceSort64.s */
/*******************************************/ /* Constantes file */ /*******************************************/ /* for this file see task include a file in language AArch64 assembly */ .include "../includeConstantesARM64.inc"
/*******************************************/ /* Structures */ /********************************************/ /* structure Doublylinkedlist*/
.struct 0
dllist_head: // head node
.struct dllist_head + 8
dllist_tail: // tail node
.struct dllist_tail + 8
dllist_fin: /* structure Node Doublylinked List*/
.struct 0
NDlist_next: // next element
.struct NDlist_next + 8
NDlist_prev: // previous element
.struct NDlist_prev + 8
NDlist_value: // element value or key
.struct NDlist_value + 8
NDlist_fin:
/*********************************/ /* Initialized data */ /*********************************/ .data szMessSortOk: .asciz "Table sorted.\n" szMessSortNok: .asciz "Table not sorted !!!!!.\n" sMessResult: .asciz "Value : @ \n" szCarriageReturn: .asciz "\n"
.align 4 TableNumber: .quad 1,3,11,6,2,-5,9,10,8,4,7
- TableNumber: .quad 10,9,8,7,6,-5,4,3,2,1
.equ NBELEMENTS, (. - TableNumber) / 8
/*********************************/ /* UnInitialized data */ /*********************************/ .bss sZoneConv: .skip 24 /*********************************/ /* code section */ /*********************************/ .text .global main main: // entry of program
ldr x0,qAdrTableNumber // address number table mov x1,0 // first element mov x2,NBELEMENTS // number of élements bl patienceSort ldr x0,qAdrTableNumber // address number table bl displayTable
ldr x0,qAdrTableNumber // address number table mov x1,NBELEMENTS // number of élements bl isSorted // control sort cmp x0,1 // sorted ? beq 1f ldr x0,qAdrszMessSortNok // no !! error sort bl affichageMess b 100f
1: // yes
ldr x0,qAdrszMessSortOk bl affichageMess
100: // standard end of the program
mov x0,0 // return code mov x8,EXIT // request to exit program svc 0 // perform the system call
qAdrsZoneConv: .quad sZoneConv qAdrszCarriageReturn: .quad szCarriageReturn qAdrsMessResult: .quad sMessResult qAdrTableNumber: .quad TableNumber qAdrszMessSortOk: .quad szMessSortOk qAdrszMessSortNok: .quad szMessSortNok /******************************************************************/ /* control sorted table */ /******************************************************************/ /* x0 contains the address of table */ /* x1 contains the number of elements > 0 */ /* x0 return 0 if not sorted 1 if sorted */ isSorted:
stp x2,lr,[sp,-16]! // save registers stp x3,x4,[sp,-16]! // save registers mov x2,0 ldr x4,[x0,x2,lsl 3]
1:
add x2,x2,1 cmp x2,x1 bge 99f ldr x3,[x0,x2, lsl 3] cmp x3,x4 blt 98f mov x4,x3 b 1b
98:
mov x0,0 // not sorted b 100f
99:
mov x0,1 // sorted
100:
ldp x3,x4,[sp],16 // restaur 2 registers ldp x2,lr,[sp],16 // restaur 2 registers ret // return to address lr x30
/******************************************************************/ /* patience sort */ /******************************************************************/ /* x0 contains the address of table */ /* x1 contains first start index /* x2 contains the number of elements */ patienceSort:
stp x1,lr,[sp,-16]! // save registers stp x2,x3,[sp,-16]! // save registers stp x4,x5,[sp,-16]! // save registers stp x6,x7,[sp,-16]! // save registers stp x8,x9,[sp,-16]! // save registers lsl x9,x2,1 // compute total size of piles (2 list pointer by pile ) lsl x10,x9,3 // 8 bytes by number sub sp,sp,x10 // reserve place to stack mov fp,sp // frame pointer = stack mov x3,0 // index mov x4,0
1:
str x4,[fp,x3,lsl 3] // init piles area add x3,x3,1 // increment index cmp x3,x9 blt 1b mov x3,0 // index value mov x4,0 // counter first pile mov x8,x0 // save table address
2:
ldr x1,[x8,x3,lsl 3] // load value add x0,fp,x4,lsl 4 // pile address bl isEmpty cmp x0,0 // pile empty ? bne 3f add x0,fp,x4,lsl 4 // pile address bl insertHead // insert value x1 b 5f
3:
add x0,fp,x4,lsl 4 // pile address ldr x5,[x0,dllist_head] ldr x5,[x5,NDlist_value] // load first list value cmp x1,x5 // compare value and last value on the pile blt 4f add x0,fp,x4,lsl 4 // pile address bl insertHead // insert value x1 b 5f
4: // value is smaller créate a new pile
add x4,x4,1 add x0,fp,x4,lsl 4 // pile address bl insertHead // insert value x1
5:
add x3,x3,1 // increment index value cmp x3,x2 // end blt 2b // and loop /* step 2 */ mov x6,0 // index value table
6:
mov x3,0 // index pile mov x5, 1<<62 // min
7: // search minimum
add x0,fp,x3,lsl 4 bl isEmpty cmp x0,0 beq 8f add x0,fp,x3,lsl 4 bl searchMinList cmp x0,x5 // compare min global bge 8f mov x5,x0 // smaller -> store new min mov x7,x1 // and pointer to min add x9,fp,x3,lsl 4 // and head list
8:
add x3,x3,1 // next pile cmp x3,x4 // end ? ble 7b str x5,[x8,x6,lsl 3] // store min to table value mov x0,x9 // and suppress the value in the pile mov x1,x7 bl suppressNode add x6,x6,1 // increment index value cmp x6,x2 // end ? blt 6b add sp,sp,x10 // stack alignement
100:
ldp x8,x9,[sp],16 // restaur 2 registers ldp x6,x7,[sp],16 // restaur 2 registers ldp x4,x5,[sp],16 // restaur 2 registers ldp x2,x3,[sp],16 // restaur 2 registers ldp x1,lr,[sp],16 // restaur 2 registers ret // return to address lr x30
/******************************************************************/ /* Display table elements */ /******************************************************************/ /* x0 contains the address of table */ displayTable:
stp x1,lr,[sp,-16]! // save registers stp x2,x3,[sp,-16]! // save registers mov x2,x0 // table address mov x3,0
1: // loop display table
ldr x0,[x2,x3,lsl 3] ldr x1,qAdrsZoneConv bl conversion10S // décimal conversion ldr x0,qAdrsMessResult ldr x1,qAdrsZoneConv bl strInsertAtCharInc // insert result at // character bl affichageMess // display message add x3,x3,1 cmp x3,NBELEMENTS - 1 ble 1b ldr x0,qAdrszCarriageReturn bl affichageMess mov x0,x2
100:
ldp x2,x3,[sp],16 // restaur 2 registers ldp x1,lr,[sp],16 // restaur 2 registers ret // return to address lr x30
/******************************************************************/ /* list is empty ? */ /******************************************************************/ /* x0 contains the address of the list structure */ /* x0 return 0 if empty else return 1 */ isEmpty:
ldr x0,[x0,#dllist_head] cmp x0,0 cset x0,ne ret // return
/******************************************************************/ /* insert value at list head */ /******************************************************************/ /* x0 contains the address of the list structure */ /* x1 contains value */ insertHead:
stp x1,lr,[sp,-16]! // save registers stp x2,x3,[sp,-16]! // save registers stp x4,x5,[sp,-16]! // save registers mov x4,x0 // save address mov x0,x1 // value bl createNode cmp x0,#-1 // allocation error ? beq 100f ldr x2,[x4,#dllist_head] // load address first node str x2,[x0,#NDlist_next] // store in next pointer on new node mov x1,#0 str x1,[x0,#NDlist_prev] // store zero in previous pointer on new node str x0,[x4,#dllist_head] // store address new node in address head list cmp x2,#0 // address first node is null ? beq 1f str x0,[x2,#NDlist_prev] // no store adresse new node in previous pointer b 100f
1:
str x0,[x4,#dllist_tail] // else store new node in tail address
100:
ldp x4,x5,[sp],16 // restaur 2 registers ldp x2,x3,[sp],16 // restaur 2 registers ldp x1,lr,[sp],16 // restaur 2 registers ret // return to address lr x30
/******************************************************************/ /* search value minimum */ /******************************************************************/ /* x0 contains the address of the list structure */ /* x0 return min */ /* x1 return address of node */ searchMinList:
stp x2,lr,[sp,-16]! // save registers stp x3,x4,[sp,-16]! // save registers ldr x0,[x0,#dllist_head] // load first node mov x3,1<<62 mov x1,0
1:
cmp x0,0 // null -> end beq 99f ldr x2,[x0,#NDlist_value] // load node value cmp x2,x3 // min ? bge 2f mov x3,x2 // value -> min mov x1,x0 // store pointer
2:
ldr x0,[x0,#NDlist_next] // load addresse next node b 1b // and loop
99:
mov x0,x3 // return minimum
100:
ldp x3,x4,[sp],16 // restaur 2 registers ldp x2,lr,[sp],16 // restaur 2 registers ret // return to address lr x30
/******************************************************************/ /* suppress node */ /******************************************************************/ /* x0 contains the address of the list structure */ /* x1 contains the address to node to suppress */ suppressNode:
stp x2,lr,[sp,-16]! // save registers stp x3,x4,[sp,-16]! // save registers ldr x2,[x1,#NDlist_next] // load addresse next node ldr x3,[x1,#NDlist_prev] // load addresse prev node cmp x3,#0 beq 1f str x2,[x3,#NDlist_next] b 2f
1:
str x3,[x0,#NDlist_next]
2:
cmp x2,#0 beq 3f str x3,[x2,#NDlist_prev] b 100f
3:
str x2,[x0,#NDlist_prev]
100:
ldp x3,x4,[sp],16 // restaur 2 registers ldp x2,lr,[sp],16 // restaur 2 registers ret // return to address lr x30
/******************************************************************/ /* Create new node */ /******************************************************************/ /* x0 contains the value */ /* x0 return node address or -1 if allocation error*/ createNode:
stp x1,lr,[sp,-16]! // save registers
stp x2,x3,[sp,-16]! // save registers
stp x4,x8,[sp,-16]! // save registers
mov x4,x0 // save value
// allocation place on the heap
mov x0,0 // allocation place heap
mov x8,BRK // call system 'brk'
svc 0
mov x3,x0 // save address heap for output string
add x0,x0,NDlist_fin // reservation place one element
mov x8,BRK // call system 'brk'
svc #0
cmp x0,-1 // allocation error
beq 100f
mov x0,x3
str x4,[x0,#NDlist_value] // store value
mov x2,0
str x2,[x0,#NDlist_next] // store zero to pointer next
str x2,[x0,#NDlist_prev] // store zero to pointer previous
100:
ldp x4,x8,[sp],16 // restaur 2 registers ldp x2,x3,[sp],16 // restaur 2 registers ldp x1,lr,[sp],16 // restaur 2 registers ret // return to address lr x30
/********************************************************/ /* File Include fonctions */ /********************************************************/ /* for this file see task include a file in language AArch64 assembly */ .include "../includeARM64.inc" </lang>
ARM Assembly
<lang ARM Assembly> /* ARM assembly Raspberry PI */ /* program patienceSort.s */
/* REMARK 1 : this program use routines in a include file see task Include a file language arm assembly for the routine affichageMess conversion10 see at end of this program the instruction include */
/* for constantes see task include a file in arm assembly */ /************************************/ /* Constantes */ /************************************/ .include "../constantes.inc"
.include "../../ficmacros.s" /*******************************************/ /* Structures */ /********************************************/ /* structure Doublylinkedlist*/
.struct 0
dllist_head: @ head node
.struct dllist_head + 4
dllist_tail: @ tail node
.struct dllist_tail + 4
dllist_fin: /* structure Node Doublylinked List*/
.struct 0
NDlist_next: @ next element
.struct NDlist_next + 4
NDlist_prev: @ previous element
.struct NDlist_prev + 4
NDlist_value: @ element value or key
.struct NDlist_value + 4
NDlist_fin:
/*********************************/ /* Initialized data */ /*********************************/ .data szMessSortOk: .asciz "Table sorted.\n" szMessSortNok: .asciz "Table not sorted !!!!!.\n" sMessResult: .asciz "Value : @ \n" szCarriageReturn: .asciz "\n"
.align 4 TableNumber: .int 1,11,3,6,2,5,9,10,8,4,7
- TableNumber: .int 10,9,8,7,6,5,4,3,2,1
.equ NBELEMENTS, (. - TableNumber) / 4
/*********************************/ /* UnInitialized data */ /*********************************/ .bss sZoneConv: .skip 24 /*********************************/ /* code section */ /*********************************/ .text .global main main: @ entry of program
ldr r0,iAdrTableNumber @ address number table mov r1,#0 @ first element mov r2,#NBELEMENTS @ number of élements bl patienceSort ldr r0,iAdrTableNumber @ address number table bl displayTable ldr r0,iAdrTableNumber @ address number table mov r1,#NBELEMENTS @ number of élements bl isSorted @ control sort cmp r0,#1 @ sorted ? beq 1f ldr r0,iAdrszMessSortNok @ no !! error sort bl affichageMess b 100f
1: @ yes
ldr r0,iAdrszMessSortOk bl affichageMess
100: @ standard end of the program
mov r0, #0 @ return code mov r7, #EXIT @ request to exit program svc #0 @ perform the system call
iAdrszCarriageReturn: .int szCarriageReturn iAdrsMessResult: .int sMessResult iAdrTableNumber: .int TableNumber iAdrszMessSortOk: .int szMessSortOk iAdrszMessSortNok: .int szMessSortNok /******************************************************************/ /* control sorted table */ /******************************************************************/ /* r0 contains the address of table */ /* r1 contains the number of elements > 0 */ /* r0 return 0 if not sorted 1 if sorted */ isSorted:
push {r2-r4,lr} @ save registers
mov r2,#0
ldr r4,[r0,r2,lsl #2]
1:
add r2,#1 cmp r2,r1 movge r0,#1 bge 100f ldr r3,[r0,r2, lsl #2] cmp r3,r4 movlt r0,#0 blt 100f mov r4,r3 b 1b
100:
pop {r2-r4,lr}
bx lr @ return
/******************************************************************/ /* patience sort */ /******************************************************************/ /* r0 contains the address of table */ /* r1 contains first start index /* r2 contains the number of elements */ patienceSort:
push {r1-r9,lr} @ save registers
lsl r9,r2,#1 @ compute total size of piles (2 list pointer by pile )
lsl r10,r9,#2 @ 4 bytes by number
sub sp,sp,r10 @ reserve place to stack
mov fp,sp @ frame pointer = stack
mov r3,#0 @ index
mov r4,#0
1:
str r4,[fp,r3,lsl #2] @ init piles area add r3,r3,#1 @ increment index cmp r3,r9 blt 1b mov r3,#0 @ index value mov r4,#0 @ counter first pile mov r8,r0 @ save table address
2:
ldr r1,[r8,r3,lsl #2] @ load value add r0,fp,r4,lsl #3 @ pile address bl isEmpty cmp r0,#0 @ pile empty ? bne 3f add r0,fp,r4,lsl #3 @ pile address bl insertHead @ insert value r1 b 5f
3:
add r0,fp,r4,lsl #3 @ pile address ldr r5,[r0,#dllist_head] ldr r5,[r5,#NDlist_value] @ load first list value cmp r1,r5 @ compare value and last value on the pile blt 4f add r0,fp,r4,lsl #3 @ pile address bl insertHead @ insert value r1 b 5f
4: @ value is smaller créate a new pile
add r4,r4,#1 add r0,fp,r4,lsl #3 @ pile address bl insertHead @ insert value r1
5:
add r3,r3,#1 @ increment index value cmp r3,r2 @ end blt 2b @ and loop /* step 2 */ mov r6,#0 @ index value table
6:
mov r3,#0 @ index pile mov r5,# 1<<30 @ min
7: @ search minimum
add r0,fp,r3,lsl #3 bl isEmpty cmp r0,#0 beq 8f add r0,fp,r3,lsl #3 bl searchMinList cmp r0,r5 @ compare min global movlt r5,r0 @ smaller -> store new min movlt r7,r1 @ and pointer to min addlt r9,fp,r3,lsl #3 @ and head list
8:
add r3,r3,#1 @ next pile cmp r3,r4 @ end ? ble 7b str r5,[r8,r6,lsl #2] @ store min to table value mov r0,r9 @ and suppress the value in the pile mov r1,r7 bl suppressNode add r6,r6,#1 @ increment index value cmp r6,r2 @ end ? blt 6b add sp,sp,r10 @ stack alignement
100:
pop {r1-r9,lr}
bx lr @ return
/******************************************************************/
/* Display table elements */
/******************************************************************/
/* r0 contains the address of table */
displayTable:
push {r0-r3,lr} @ save registers
mov r2,r0 @ table address
mov r3,#0
1: @ loop display table
ldr r0,[r2,r3,lsl #2] ldr r1,iAdrsZoneConv @ bl conversion10S @ décimal conversion ldr r0,iAdrsMessResult ldr r1,iAdrsZoneConv @ insert conversion bl strInsertAtCharInc bl affichageMess @ display message add r3,#1 cmp r3,#NBELEMENTS - 1 ble 1b ldr r0,iAdrszCarriageReturn bl affichageMess mov r0,r2
100:
pop {r0-r3,lr}
bx lr
iAdrsZoneConv: .int sZoneConv /******************************************************************/ /* list is empty ? */ /******************************************************************/ /* r0 contains the address of the list structure */ /* r0 return 0 if empty else return 1 */ isEmpty:
ldr r0,[r0,#dllist_head] cmp r0,#0 movne r0,#1 bx lr @ return
/******************************************************************/ /* insert value at list head */ /******************************************************************/ /* r0 contains the address of the list structure */ /* r1 contains value */ insertHead:
push {r1-r4,lr} @ save registers
mov r4,r0 @ save address
mov r0,r1 @ value
bl createNode
cmp r0,#-1 @ allocation error ?
beq 100f
ldr r2,[r4,#dllist_head] @ load address first node
str r2,[r0,#NDlist_next] @ store in next pointer on new node
mov r1,#0
str r1,[r0,#NDlist_prev] @ store zero in previous pointer on new node
str r0,[r4,#dllist_head] @ store address new node in address head list
cmp r2,#0 @ address first node is null ?
strne r0,[r2,#NDlist_prev] @ no store adresse new node in previous pointer
streq r0,[r4,#dllist_tail] @ else store new node in tail address
100:
pop {r1-r4,lr} @ restaur registers
bx lr @ return
/******************************************************************/ /* search value minimum */ /******************************************************************/ /* r0 contains the address of the list structure */ /* r0 return min */ /* r1 return address of node */ searchMinList:
push {r2,r3,lr} @ save registers
ldr r0,[r0,#dllist_head] @ load first node
mov r3,#1<<30
mov r1,#0
1:
cmp r0,#0 @ null -> end moveq r0,r3 beq 100f ldr r2,[r0,#NDlist_value] @ load node value cmp r2,r3 @ min ? movlt r3,r2 @ value -> min movlt r1,r0 @ store pointer ldr r0,[r0,#NDlist_next] @ load addresse next node b 1b @ and loop
100:
pop {r2,r3,lr} @ restaur registers
bx lr @ return
/******************************************************************/ /* suppress node */ /******************************************************************/ /* r0 contains the address of the list structure */ /* r1 contains the address to node to suppress */ /* r0 return address of node or -1 if not found */ suppressNode:
push {r2,r3,lr} @ save registers
ldr r2,[r1,#NDlist_next] @ load addresse next node
ldr r3,[r1,#NDlist_prev] @ load addresse prev node
cmp r3,#0
strne r2,[r3,#NDlist_next]
streq r3,[r0,#NDlist_next]
cmp r2,#0
strne r3,[r2,#NDlist_prev]
streq r2,[r0,#NDlist_prev]
100:
pop {r2,r3,lr} @ restaur registers
bx lr @ return
/******************************************************************/ /* Create new node */ /******************************************************************/ /* r0 contains the value */ /* r0 return node address or -1 if allocation error*/ createNode:
push {r1-r7,lr} @ save registers
mov r4,r0 @ save value
@ allocation place on the heap
mov r0,#0 @ allocation place heap
mov r7,#0x2D @ call system 'brk'
svc #0
mov r5,r0 @ save address heap for output string
add r0,#NDlist_fin @ reservation place one element
mov r7,#0x2D @ call system 'brk'
svc #0
cmp r0,#-1 @ allocation error
beq 100f
mov r0,r5
str r4,[r0,#NDlist_value] @ store value
mov r2,#0
str r2,[r0,#NDlist_next] @ store zero to pointer next
str r2,[r0,#NDlist_prev] @ store zero to pointer previous
100:
pop {r1-r7,lr} @ restaur registers
bx lr @ return
/***************************************************/ /* ROUTINES INCLUDE */ /***************************************************/ .include "../affichage.inc" </lang>
C
Takes integers as input, prints out usage on incorrect invocation <lang C>
- include<stdlib.h>
- include<stdio.h>
int* patienceSort(int* arr,int size){ int decks[size][size],i,j,min,pickedRow;
int *count = (int*)calloc(sizeof(int),size),*sortedArr = (int*)malloc(size*sizeof(int));
for(i=0;i<size;i++){ for(j=0;j<size;j++){ if(count[j]==0 || (count[j]>0 && decks[j][count[j]-1]>=arr[i])){ decks[j][count[j]] = arr[i]; count[j]++; break; } } }
min = decks[0][count[0]-1]; pickedRow = 0;
for(i=0;i<size;i++){ for(j=0;j<size;j++){ if(count[j]>0 && decks[j][count[j]-1]<min){ min = decks[j][count[j]-1]; pickedRow = j; } } sortedArr[i] = min; count[pickedRow]--;
for(j=0;j<size;j++) if(count[j]>0){ min = decks[j][count[j]-1]; pickedRow = j; break; } }
free(count); free(decks);
return sortedArr; }
int main(int argC,char* argV[]) { int *arr, *sortedArr, i;
if(argC==0) printf("Usage : %s <integers to be sorted separated by space>"); else{ arr = (int*)malloc((argC-1)*sizeof(int));
for(i=1;i<=argC;i++) arr[i-1] = atoi(argV[i]);
sortedArr = patienceSort(arr,argC-1);
for(i=0;i<argC-1;i++) printf("%d ",sortedArr[i]); }
return 0; } </lang> Invocation and output :
C:\rosettaCode>patienceSort.exe 4 65 2 -31 0 99 83 781 1 -31 0 1 2 4 65 83 99 781
C++
<lang cpp>#include <iostream>
- include <vector>
- include <stack>
- include <iterator>
- include <algorithm>
- include <cassert>
template <class E> struct pile_less {
bool operator()(const std::stack<E> &pile1, const std::stack<E> &pile2) const {
return pile1.top() < pile2.top();
}
};
template <class E> struct pile_greater {
bool operator()(const std::stack<E> &pile1, const std::stack<E> &pile2) const {
return pile1.top() > pile2.top();
}
};
template <class Iterator>
void patience_sort(Iterator first, Iterator last) {
typedef typename std::iterator_traits<Iterator>::value_type E; typedef std::stack<E> Pile;
std::vector<Pile> piles;
// sort into piles
for (Iterator it = first; it != last; it++) {
E& x = *it;
Pile newPile;
newPile.push(x);
typename std::vector<Pile>::iterator i =
std::lower_bound(piles.begin(), piles.end(), newPile, pile_less<E>());
if (i != piles.end())
i->push(x);
else
piles.push_back(newPile);
}
// priority queue allows us to merge piles efficiently
// we use greater-than comparator for min-heap
std::make_heap(piles.begin(), piles.end(), pile_greater<E>());
for (Iterator it = first; it != last; it++) {
std::pop_heap(piles.begin(), piles.end(), pile_greater<E>());
Pile &smallPile = piles.back();
*it = smallPile.top();
smallPile.pop();
if (smallPile.empty())
piles.pop_back();
else
std::push_heap(piles.begin(), piles.end(), pile_greater<E>());
}
assert(piles.empty());
}
int main() {
int a[] = {4, 65, 2, -31, 0, 99, 83, 782, 1};
patience_sort(a, a+sizeof(a)/sizeof(*a));
std::copy(a, a+sizeof(a)/sizeof(*a), std::ostream_iterator<int>(std::cout, ", "));
std::cout << std::endl;
return 0;
}</lang>
- Output:
-31, 0, 1, 2, 4, 65, 83, 99, 782,
Clojure
<lang clojure> (defn patience-insert
"Inserts a value into the sequence where each element is a stack.
Comparison replaces the definition of less than.
Uses the greedy strategy."
[comparison sequence value]
(lazy-seq
(if (empty? sequence) `((~value)) ;; If there are no places to put the "card", make a new stack
(let [stack (first sequence)
top (peek stack)]
(if (comparison value top)
(cons (conj stack value) ;; Either put the card in a stack or recurse to the next stack
(rest sequence))
(cons stack
(patience-insert comparison
(rest sequence)
value)))))))
(defn patience-remove
"Removes the value from the top of the first stack it shows up in.
Leaves the stacks otherwise intact."
[sequence value]
(lazy-seq
(if (empty? sequence) nil ;; If there are no stacks, we have no work to do
(let [stack (first sequence)
top (peek stack)]
(if (= top value) ;; Are we there yet?
(let [left-overs (pop stack)]
(if (empty? left-overs) ;; Handle the case that the stack is empty and needs to be removed
(rest sequence)
(cons left-overs
(rest sequence))))
(cons stack
(patience-remove (rest sequence)
value)))))))
(defn patience-recover
"Builds a sorted sequence from a list of patience stacks.
The given comparison takes the place of 'less than'"
[comparison sequence]
(loop [sequence sequence
sorted []]
(if (empty? sequence) sorted
(let [smallest (reduce #(if (comparison %1 %2) %1 %2) ;; Gets the smallest element in the list
(map peek sequence))
remaining (patience-remove sequence smallest)]
(recur remaining
(conj sorted smallest)))))) ;; Recurse over the remaining values and add the new smallest to the end of the sorted list
(defn patience-sort
"Sorts the sequence by comparison.
First builds the list of valid patience stacks.
Then recovers the sorted list from those.
If you don't supply a comparison, assumes less than."
([comparison sequence]
(->> (reduce (comp doall ;; This is prevent a stack overflow by making sure all work is done when it needs to be
(partial patience-insert comparison)) ;; Insert all the values into the list of stacks
nil
sequence)
(patience-recover comparison))) ;; After we have the stacks, send it off to recover the sorted list
([sequence]
;; In the case we don't have an operator, defer to ourselves with less than
(patience-sort < sequence)))
- Sort the test sequence and print it
(println (patience-sort [4 65 2 -31 0 99 83 782 1])) </lang>
- Output:
[-31 0 1 2 4 65 83 99 782]
D
<lang d>import std.stdio, std.array, std.range, std.algorithm;
void patienceSort(T)(T[] items) /*pure nothrow @safe*/ if (__traits(compiles, T.init < T.init)) {
//SortedRange!(int[][], q{ a.back < b.back }) piles;
T[][] piles;
foreach (x; items) {
auto p = [x];
immutable i = piles.length -
piles
.assumeSorted!q{ a.back < b.back }
.upperBound(p)
.length;
if (i != piles.length)
piles[i] ~= x;
else
piles ~= p;
}
piles.nWayUnion!q{ a > b }.copy(items.retro);
}
void main() {
auto data = [4, 65, 2, -31, 0, 99, 83, 782, 1]; data.patienceSort; assert(data.isSorted); data.writeln;
}</lang>
- Output:
[-31, 0, 1, 2, 4, 65, 83, 99, 782]
Elixir
<lang elixir>defmodule Sort do
def patience_sort(list) do
piles = deal_pile(list, [])
merge_pile(piles, [])
end
defp deal_pile([], piles), do: piles
defp deal_pile([h|t], piles) do
index = Enum.find_index(piles, fn pile -> hd(pile) <= h end)
new_piles = if index, do: add_element(piles, index, h, []),
else: piles ++ h
deal_pile(t, new_piles)
end
defp add_element([h|t], 0, elm, work), do: Enum.reverse(work, [[elm | h] | t])
defp add_element([h|t], index, elm, work), do: add_element(t, index-1, elm, [h | work])
defp merge_pile([], list), do: list
defp merge_pile(piles, list) do
{max, index} = max_index(piles)
merge_pile(delete_element(piles, index, []), [max | list])
end
defp max_index([h|t]), do: max_index(t, hd(h), 1, 0)
defp max_index([], max, _, max_i), do: {max, max_i}
defp max_index([h|t], max, index, _) when hd(h)>max, do: max_index(t, hd(h), index+1, index)
defp max_index([_|t], max, index, max_i) , do: max_index(t, max, index+1, max_i)
defp delete_element([h|t], 0, work) when length(h)==1, do: Enum.reverse(work, t)
defp delete_element([h|t], 0, work) , do: Enum.reverse(work, [tl(h) | t])
defp delete_element([h|t], index, work), do: delete_element(t, index-1, [h | work])
end
IO.inspect Sort.patience_sort [4, 65, 2, -31, 0, 99, 83, 782, 1]</lang>
- Output:
[-31, 0, 1, 2, 4, 65, 83, 99, 782]
Go
This version is written for int slices, but can be easily modified to sort other types. <lang go>package main
import (
"fmt" "container/heap" "sort"
)
type IntPile []int func (self IntPile) Top() int { return self[len(self)-1] } func (self *IntPile) Pop() int {
x := (*self)[len(*self)-1] *self = (*self)[:len(*self)-1] return x
}
type IntPilesHeap []IntPile func (self IntPilesHeap) Len() int { return len(self) } func (self IntPilesHeap) Less(i, j int) bool { return self[i].Top() < self[j].Top() } func (self IntPilesHeap) Swap(i, j int) { self[i], self[j] = self[j], self[i] } func (self *IntPilesHeap) Push(x interface{}) { *self = append(*self, x.(IntPile)) } func (self *IntPilesHeap) Pop() interface{} {
x := (*self)[len(*self)-1] *self = (*self)[:len(*self)-1] return x
}
func patience_sort (n []int) {
var piles []IntPile
// sort into piles
for _, x := range n {
j := sort.Search(len(piles), func (i int) bool { return piles[i].Top() >= x })
if j != len(piles) {
piles[j] = append(piles[j], x)
} else {
piles = append(piles, IntPile{ x })
}
}
// priority queue allows us to merge piles efficiently
hp := IntPilesHeap(piles)
heap.Init(&hp)
for i, _ := range n {
smallPile := heap.Pop(&hp).(IntPile)
n[i] = smallPile.Pop()
if len(smallPile) != 0 {
heap.Push(&hp, smallPile)
}
}
if len(hp) != 0 {
panic("something went wrong")
}
}
func main() {
a := []int{4, 65, 2, -31, 0, 99, 83, 782, 1}
patience_sort(a)
fmt.Println(a)
}</lang>
- Output:
[-31 0 1 2 4 65 83 99 782]
Haskell
<lang haskell>import Control.Monad.ST import Control.Monad import Data.Array.ST import Data.List import qualified Data.Set as S
newtype Pile a = Pile [a]
instance Eq a => Eq (Pile a) where
Pile (x:_) == Pile (y:_) = x == y
instance Ord a => Ord (Pile a) where
Pile (x:_) `compare` Pile (y:_) = x `compare` y
patienceSort :: Ord a => [a] -> [a] patienceSort = mergePiles . sortIntoPiles where
sortIntoPiles :: Ord a => [a] -> a sortIntoPiles lst = runST $ do piles <- newSTArray (1, length lst) [] let bsearchPiles x len = aux 1 len where aux lo hi | lo > hi = return lo | otherwise = do let mid = (lo + hi) `div` 2 m <- readArray piles mid if head m < x then aux (mid+1) hi else aux lo (mid-1) f len x = do i <- bsearchPiles x len writeArray piles i . (x:) =<< readArray piles i return $ if i == len+1 then len+1 else len len <- foldM f 0 lst e <- getElems piles return $ take len e where newSTArray :: Ix i => (i,i) -> e -> ST s (STArray s i e) newSTArray = newArray
mergePiles :: Ord a => a -> [a] mergePiles = unfoldr f . S.fromList . map Pile where f pq = case S.minView pq of Nothing -> Nothing Just (Pile [x], pq') -> Just (x, pq') Just (Pile (x:xs), pq') -> Just (x, S.insert (Pile xs) pq')
main :: IO () main = print $ patienceSort [4, 65, 2, -31, 0, 99, 83, 782, 1]</lang>
- Output:
[-31,0,1,2,4,65,83,99,782]
J
The data structure for append and transfer are as x argument a list with cdr as the stacks and car as the data to sort or growing sorted list; and the y argument being the index of pile to operate on. New piles are created by using the new value, accomplished by selecting the entire x argument as a result. Filtering removes empty stacks during unpiling. <lang J> Until =: 2 :'u^:(0=v)^:_' Filter =: (#~`)(`:6)
locate_for_append =: 1 i.~ (<&> {:S:0) NB. returns an index append =: (<@:(({::~ >:) , 0 {:: [)`]`(}.@:[)}) :: [ pile =: (, append locate_for_append)/@:(;/) NB. pile DATA
smallest =: ((>:@:i. , ]) <./)@:({:S:0@:}.) NB. index of pile with smallest value , that value transfer =: (}:&.>@:({~ {.) , <@:((0{::[),{:@:]))`(1 0 * ])`[} unpile =: >@:{.@:((0<#S:0)Filter@:(transfer smallest)Until(1=#))@:(a:&,)
patience_sort =: unpile@:pile
assert (/:~ -: patience_sort) ?@$~30 NB. test with 30 randomly chosen integers
Show =: 1 : 0
smoutput y u y
smoutput A=:x ,&:< y x u y
)
pile_demo =: (, append Show locate_for_append)/@:(;/) NB. pile DATA unpile_demo =: >@:{.@:((0<#S:0)Filter@:(transfer Show smallest)Until(1=#))@:(a:&,) patience_sort_demo =: unpile_demo@:pile_demo </lang>
JVERSION Engine: j701/2011-01-10/11:25 Library: 8.02.12 Platform: Linux 64 Installer: unknown InstallPath: /usr/share/j/8.0.2 patience_sort_demo Show ?.@$~10 4 6 8 6 5 8 6 6 6 9 ┌─────┬─┐ │┌─┬─┐│0│ ││6│9││ │ │└─┴─┘│ │ └─────┴─┘ ┌───────┬─┐ │┌─┬───┐│1│ ││6│9 6││ │ │└─┴───┘│ │ └───────┴─┘ ┌─────────┬─┐ │┌─┬─┬───┐│2│ ││6│6│9 6││ │ │└─┴─┴───┘│ │ └─────────┴─┘ ┌───────────┬─┐ │┌─┬─┬─┬───┐│3│ ││8│6│6│9 6││ │ │└─┴─┴─┴───┘│ │ └───────────┴─┘ ┌─────────────┬─┐ │┌─┬─┬─┬─┬───┐│0│ ││5│8│6│6│9 6││ │ │└─┴─┴─┴─┴───┘│ │ └─────────────┴─┘ ┌───────────────┬─┐ │┌─┬───┬─┬─┬───┐│4│ ││6│8 5│6│6│9 6││ │ │└─┴───┴─┴─┴───┘│ │ └───────────────┴─┘ ┌─────────────────┬─┐ │┌─┬─┬───┬─┬─┬───┐│5│ ││8│6│8 5│6│6│9 6││ │ │└─┴─┴───┴─┴─┴───┘│ │ └─────────────────┴─┘ ┌───────────────────┬─┐ │┌─┬─┬─┬───┬─┬─┬───┐│0│ ││6│8│6│8 5│6│6│9 6││ │ │└─┴─┴─┴───┴─┴─┴───┘│ │ └───────────────────┴─┘ ┌─────────────────────┬─┐ │┌─┬───┬─┬───┬─┬─┬───┐│0│ ││4│8 6│6│8 5│6│6│9 6││ │ │└─┴───┴─┴───┴─┴─┴───┘│ │ └─────────────────────┴─┘ ┌──────────────────────┬───┐ │┌┬─────┬─┬───┬─┬─┬───┐│1 4│ │││8 6 4│6│8 5│6│6│9 6││ │ │└┴─────┴─┴───┴─┴─┴───┘│ │ └──────────────────────┴───┘ ┌─────────────────────┬───┐ │┌─┬───┬─┬───┬─┬─┬───┐│3 5│ ││4│8 6│6│8 5│6│6│9 6││ │ │└─┴───┴─┴───┴─┴─┴───┘│ │ └─────────────────────┴───┘ ┌─────────────────────┬───┐ │┌───┬───┬─┬─┬─┬─┬───┐│1 6│ ││4 5│8 6│6│8│6│6│9 6││ │ │└───┴───┴─┴─┴─┴─┴───┘│ │ └─────────────────────┴───┘ ┌─────────────────────┬───┐ │┌─────┬─┬─┬─┬─┬─┬───┐│2 6│ ││4 5 6│8│6│8│6│6│9 6││ │ │└─────┴─┴─┴─┴─┴─┴───┘│ │ └─────────────────────┴───┘ ┌─────────────────────┬───┐ │┌───────┬─┬─┬─┬─┬───┐│3 6│ ││4 5 6 6│8│8│6│6│9 6││ │ │└───────┴─┴─┴─┴─┴───┘│ │ └─────────────────────┴───┘ ┌─────────────────────┬───┐ │┌─────────┬─┬─┬─┬───┐│3 6│ ││4 5 6 6 6│8│8│6│9 6││ │ │└─────────┴─┴─┴─┴───┘│ │ └─────────────────────┴───┘ ┌─────────────────────┬───┐ │┌───────────┬─┬─┬───┐│3 6│ ││4 5 6 6 6 6│8│8│9 6││ │ │└───────────┴─┴─┴───┘│ │ └─────────────────────┴───┘ ┌─────────────────────┬───┐ │┌─────────────┬─┬─┬─┐│1 8│ ││4 5 6 6 6 6 6│8│8│9││ │ │└─────────────┴─┴─┴─┘│ │ └─────────────────────┴───┘ ┌─────────────────────┬───┐ │┌───────────────┬─┬─┐│1 8│ ││4 5 6 6 6 6 6 8│8│9││ │ │└───────────────┴─┴─┘│ │ └─────────────────────┴───┘ ┌─────────────────────┬───┐ │┌─────────────────┬─┐│1 9│ ││4 5 6 6 6 6 6 8 8│9││ │ │└─────────────────┴─┘│ │ └─────────────────────┴───┘ 4 5 6 6 6 6 6 8 8 9
Java
<lang java>import java.util.*;
public class PatienceSort {
public static <E extends Comparable<? super E>> void sort (E[] n) {
List<Pile<E>> piles = new ArrayList<Pile<E>>();
// sort into piles
for (E x : n) {
Pile<E> newPile = new Pile<E>();
newPile.push(x);
int i = Collections.binarySearch(piles, newPile);
if (i < 0) i = ~i;
if (i != piles.size())
piles.get(i).push(x);
else
piles.add(newPile);
}
// priority queue allows us to retrieve least pile efficiently
PriorityQueue<Pile<E>> heap = new PriorityQueue<Pile<E>>(piles);
for (int c = 0; c < n.length; c++) {
Pile<E> smallPile = heap.poll();
n[c] = smallPile.pop();
if (!smallPile.isEmpty())
heap.offer(smallPile);
}
assert(heap.isEmpty());
}
private static class Pile<E extends Comparable<? super E>> extends Stack<E> implements Comparable<Pile<E>> {
public int compareTo(Pile<E> y) { return peek().compareTo(y.peek()); }
}
public static void main(String[] args) {
Integer[] a = {4, 65, 2, -31, 0, 99, 83, 782, 1}; sort(a); System.out.println(Arrays.toString(a));
}
}</lang>
- Output:
[-31, 0, 1, 2, 4, 65, 83, 99, 782]
JavaScript
<lang Javascript>const patienceSort = (nums) => {
const piles = []
for (let i = 0; i < nums.length; i++) {
const num = nums[i]
const destinationPileIndex = piles.findIndex(
(pile) => num >= pile[pile.length - 1]
)
if (destinationPileIndex === -1) {
piles.push([num])
} else {
piles[destinationPileIndex].push(num)
}
}
for (let i = 0; i < nums.length; i++) {
let destinationPileIndex = 0
for (let p = 1; p < piles.length; p++) {
const pile = piles[p]
if (pile[0] < piles[destinationPileIndex][0]) {
destinationPileIndex = p
}
}
const distPile = piles[destinationPileIndex]
nums[i] = distPile.shift()
if (distPile.length === 0) {
piles.splice(destinationPileIndex, 1)
}
}
return nums
} console.log(patienceSort([10,6,-30,9,18,1,-20])); </lang>
- Output:
[-30, -20, 1, 6, 9, 10, 18]
Julia
<lang julia>function patiencesort(list::Vector{T}) where T
piles = Vector{Vector{T}}()
for n in list
if isempty(piles) ||
(i = findfirst(pile -> n <= pile[end], piles)) == nothing
push!(piles, [n])
else
push!(piles[i], n)
end
end
mergesorted(piles)
end
function mergesorted(vecvec)
lengths = map(length, vecvec)
allsum = sum(lengths)
sorted = similar(vecvec[1], allsum)
for i in 1:allsum
(val, idx) = findmin(map(x -> x[end], vecvec))
sorted[i] = pop!(vecvec[idx])
if isempty(vecvec[idx])
deleteat!(vecvec, idx)
end
end
sorted
end
println(patiencesort(rand(collect(1:1000), 12)))
</lang>
- Output:
[186, 243, 255, 257, 427, 486, 513, 613, 657, 734, 866, 907]
Kotlin
<lang scala>// version 1.1.2
fun <T : Comparable<T>> patienceSort(arr: Array<T>) {
if (arr.size < 2) return
val piles = mutableListOf<MutableList<T>>()
outer@ for (el in arr) {
for (pile in piles) {
if (pile.last() > el) {
pile.add(el)
continue@outer
}
}
piles.add(mutableListOf(el))
}
for (i in 0 until arr.size) {
var min = piles[0].last()
var minPileIndex = 0
for (j in 1 until piles.size) {
if (piles[j].last() < min) {
min = piles[j].last()
minPileIndex = j
}
}
arr[i] = min
val minPile = piles[minPileIndex]
minPile.removeAt(minPile.lastIndex)
if (minPile.size == 0) piles.removeAt(minPileIndex)
}
}
fun main(args: Array<String>) {
val iArr = arrayOf(4, 65, 2, -31, 0, 99, 83, 782, 1)
patienceSort(iArr)
println(iArr.contentToString())
val cArr = arrayOf('n', 'o', 'n', 'z', 'e', 'r', 'o', 's', 'u','m')
patienceSort(cArr)
println(cArr.contentToString())
val sArr = arrayOf("dog", "cow", "cat", "ape", "ant", "man", "pig", "ass", "gnu")
patienceSort(sArr)
println(sArr.contentToString())
}</lang>
- Output:
[-31, 0, 1, 2, 4, 65, 83, 99, 782] [e, m, n, n, o, o, r, s, u, z] [ant, ape, ass, cat, cow, dog, gnu, man, pig]
OCaml
<lang ocaml>module PatienceSortFn (Ord : Set.OrderedType) : sig
val patience_sort : Ord.t list -> Ord.t list end = struct
module PilesSet = Set.Make
(struct
type t = Ord.t list
let compare x y = Ord.compare (List.hd x) (List.hd y)
end);;
let sort_into_piles list =
let piles = Array.make (List.length list) [] in
let bsearch_piles x len =
let rec aux lo hi =
if lo > hi then
lo
else
let mid = (lo + hi) / 2 in
if Ord.compare (List.hd piles.(mid)) x < 0 then
aux (mid+1) hi
else
aux lo (mid-1)
in
aux 0 (len-1)
in
let f len x =
let i = bsearch_piles x len in
piles.(i) <- x :: piles.(i);
if i = len then len+1 else len
in
let len = List.fold_left f 0 list in
Array.sub piles 0 len
let merge_piles piles =
let pq = Array.fold_right PilesSet.add piles PilesSet.empty in
let rec f pq acc =
if PilesSet.is_empty pq then
acc
else
let elt = PilesSet.min_elt pq in
match elt with
[] -> failwith "Impossible"
| x::xs ->
let pq' = PilesSet.remove elt pq in
f (if xs = [] then pq' else PilesSet.add xs pq') (x::acc)
in
List.rev (f pq [])
let patience_sort n = merge_piles (sort_into_piles n)
end</lang> Usage:
# module IntPatienceSort = PatienceSortFn
(struct
type t = int
let compare = compare
end);;
module IntPatienceSort : sig val patience_sort : int list -> int list end
# IntPatienceSort.patience_sort [4; 65; 2; -31; 0; 99; 83; 782; 1];;
- : int list = [-31; 0; 1; 2; 4; 65; 83; 99; 782]
Perl
<lang Perl>sub patience_sort {
my @s = [shift];
for my $card (@_) {
my @t = grep { $_->[-1] > $card } @s; if (@t) { push @{shift(@t)}, $card } else { push @s, [$card] }
}
my @u;
while (my @v = grep @$_, @s) {
my $value = (my $min = shift @v)->[-1]; for (@v) { ($min, $value) = ($_, $_->[-1]) if $_->[-1] < $value } push @u, pop @$min;
} return @u
}
print join ' ', patience_sort qw(4 3 6 2 -1 13 12 9); </lang>
- Output:
-1 2 3 4 6 9 12 13
Phix
<lang Phix>function patience_sort(sequence s)
-- create list of sorted lists
sequence piles = {}
for i=1 to length(s) do
object n = s[i]
for p=1 to length(piles)+1 do
if p>length(piles) then
piles = append(piles,{n})
elsif n>=piles[p][$] then
piles[p] = append(piles[p],n)
exit
end if
end for
end for
-- merge sort the piles
sequence res = ""
while length(piles) do
integer idx = smallest(piles,return_index:=true)
res = append(res,piles[idx][1])
if length(piles[idx])=1 then
piles[idx..idx] = {}
else
piles[idx] = piles[idx][2..$]
end if
end while
return res
end function
constant tests = {{4,65,2,-31,0,99,83,782,1},
{0,8,4,12,2,10,6,14,1,9,5,13,3,11,7,15},
"nonzerosum",
{"dog", "cow", "cat", "ape", "ant", "man", "pig", "ass", "gnu"}}
for i=1 to length(tests) do
pp(patience_sort(tests[i]),{pp_IntCh,false})
end for</lang>
- Output:
{-31,0,1,2,4,65,83,99,782}
{0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}
`emnnoorsuz`
{`ant`, `ape`, `ass`, `cat`, `cow`, `dog`, `gnu`, `man`, `pig`}
PHP
<lang php><?php class PilesHeap extends SplMinHeap {
public function compare($pile1, $pile2) {
return parent::compare($pile1->top(), $pile2->top());
}
}
function patience_sort(&$n) {
$piles = array();
// sort into piles
foreach ($n as $x) {
// binary search
$low = 0; $high = count($piles)-1;
while ($low <= $high) {
$mid = (int)(($low + $high) / 2);
if ($piles[$mid]->top() >= $x)
$high = $mid - 1;
else
$low = $mid + 1;
}
$i = $low;
if ($i == count($piles))
$piles[] = new SplStack();
$piles[$i]->push($x);
}
// priority queue allows us to merge piles efficiently
$heap = new PilesHeap();
foreach ($piles as $pile)
$heap->insert($pile);
for ($c = 0; $c < count($n); $c++) {
$smallPile = $heap->extract();
$n[$c] = $smallPile->pop();
if (!$smallPile->isEmpty())
$heap->insert($smallPile);
}
assert($heap->isEmpty());
}
$a = array(4, 65, 2, -31, 0, 99, 83, 782, 1); patience_sort($a); print_r($a); ?></lang>
- Output:
Array
(
[0] => -31
[1] => 0
[2] => 1
[3] => 2
[4] => 4
[5] => 65
[6] => 83
[7] => 99
[8] => 782
)
PicoLisp
<lang PicoLisp>(de leftmost (Lst N H)
(let L 1
(while (<= L H)
(use (X)
(setq X (/ (+ L H) 2))
(if (>= (caar (nth Lst X)) N)
(setq H (dec X))
(setq L (inc X)) ) ) )
L ) )
(de patience (Lst)
(let (L (cons (cons (car Lst))) C 1 M NIL)
(for N (cdr Lst)
(let I (leftmost L N C)
(and
(> I C)
(conc L (cons NIL))
(inc 'C) )
(push (nth L I) N) ) )
(make
(loop
(setq M (cons 0 T))
(for (I . Y) L
(let? S (car Y)
(and
(< S (cdr M))
(setq M (cons I S)) ) ) )
(T (=T (cdr M)))
(link (pop (nth L (car M)))) ) ) ) )
(println
(patience (4 65 2 -31 0 99 83 782 1)) )
(bye)</lang>
Prolog
<lang prolog>patience_sort(UnSorted,Sorted) :- make_piles(UnSorted,[],Piled), merge_piles(Piled,[],Sorted).
make_piles([],P,P). make_piles([N|T],[],R) :- make_piles(T,N,R). make_piles([N|T],[[P|Pnt]|Tp],R) :- N =< P, make_piles(T,[[N,P|Pnt]|Tp],R). make_piles([N|T],[[P|Pnt]|Tp],R) :- N > P, make_piles(T,[[N],[P|Pnt]|Tp], R).
merge_piles([],M,M). merge_piles([P|T],L,R) :- merge_pile(P,L,Pl), merge_piles(T,Pl,R).
merge_pile([],M,M). merge_pile(M,[],M). merge_pile([N|T1],[N|T2],[N,N|R]) :- merge_pile(T1,T2,R). merge_pile([N|T1],[P|T2],[P|R]) :- N > P, merge_pile([N|T1],T2,R). merge_pile([N|T1],[P|T2],[N|R]) :- N < P, merge_pile(T1,[P|T2],R).</lang>
- Output:
?- patience_sort([4, 65, 2, -31, 0, 99, 83, 782, 1],Sorted). Sorted = [-31, 0, 1, 2, 4, 65, 83, 99, 782] .
Python
(for functools.total_ordering)
<lang python>from functools import total_ordering from bisect import bisect_left from heapq import merge
@total_ordering class Pile(list):
def __lt__(self, other): return self[-1] < other[-1] def __eq__(self, other): return self[-1] == other[-1]
def patience_sort(n):
piles = []
# sort into piles
for x in n:
new_pile = Pile([x])
i = bisect_left(piles, new_pile)
if i != len(piles):
piles[i].append(x)
else:
piles.append(new_pile)
# use a heap-based merge to merge piles efficiently n[:] = merge(*[reversed(pile) for pile in piles])
if __name__ == "__main__":
a = [4, 65, 2, -31, 0, 99, 83, 782, 1] patience_sort(a) print a</lang>
- Output:
[-31, 0, 1, 2, 4, 65, 83, 99, 782]
Racket
<lang racket>#lang racket/base (require racket/match racket/list)
- the car of a pile is the "bottom", i.e. where we place a card
(define (place-greedily ps-in c <?)
(let inr ((vr null) (ps ps-in))
(match ps
[(list) (reverse (cons (list c) vr))]
[(list (and psh (list ph _ ...)) pst ...)
#:when (<? c ph) (append (reverse (cons (cons c psh) vr)) pst)]
[(list psh pst ...) (inr (cons psh vr) pst)])))
(define (patience-sort cs-in <?)
;; Scatter
(define piles
(let scatter ((cs cs-in) (ps null))
(match cs [(list) ps] [(cons a d) (scatter d (place-greedily ps a <?))])))
;; Gather
(let gather ((rv null) (ps piles))
(match ps
[(list) (reverse rv)]
[(list psh pst ...)
(let scan ((least psh) (seens null) (unseens pst))
(define least-card (car least))
(match* (unseens least)
[((list) (list l)) (gather (cons l rv) seens)]
[((list) (cons l lt)) (gather (cons l rv) (cons lt seens))]
[((cons (and ush (cons u _)) ust) (cons l _))
#:when (<? l u) (scan least (cons ush seens) ust)]
[((cons ush ust) least) (scan ush (cons least seens) ust)]))])))
(patience-sort (shuffle (for/list ((_ 10)) (random 7))) <)</lang>
- Output:
'(1 1 2 2 2 3 4 4 4 5)
Raku
(formerly Perl 6)
<lang perl6>multi patience(*@deck) {
my @stacks;
for @deck -> $card {
with @stacks.first: $card before *[*-1] -> $stack {
$stack.push: $card;
}
else {
@stacks.push: [$card];
}
}
gather while @stacks {
take .pop given min :by(*[*-1]), @stacks;
@stacks .= grep: +*;
}
}
say ~patience ^10 . pick(*);</lang>
- Output:
0 1 2 3 4 5 6 7 8 9
REXX
The items to be sorted can be any form of REXX number, not just integers; the items may also be character strings.
Duplicates are also sorted correctly. <lang rexx>/*REXX program sorts a list of things (or items) using the patience sort algorithm. */ parse arg xxx; say ' input: ' xxx /*obtain a list of things from the C.L.*/ n= words(xxx); #= 0; !.= 1 /*N: # of things; #: number of piles*/ @.= /* [↓] append or create a pile (@.j) */
do i=1 for n; q= word(xxx, i) /* [↓] construct the piles of things. */
do j=1 for # /*add the Q thing (item) to a pile.*/
if q>word(@.j,1) then iterate /*Is this item greater? Then skip it.*/
@.j= q @.j; iterate i /*add this item to the top of the pile.*/
end /*j*/ /* [↑] find a pile, or make a new pile*/
#= # + 1 /*increase the pile count. */
@.#= q /*define a new pile. */
end /*i*/ /*we are done with creating the piles. */
$= /* [↓] build a thingy list from piles*/
do k=1 until words($)==n /*pick off the smallest from the piles.*/
_= /*this is the smallest thingy so far···*/
do m=1 for #; z= word(@.m, !.m) /*traipse through many piles of items. */
if z== then iterate /*Is this pile null? Then skip pile.*/
if _== then _= z /*assume this one is the low pile value*/
if _>=z then do; _= z; p= m; end /*found a low value in a pile of items.*/
end /*m*/ /*the traipsing is done, we found a low*/
$= $ _ /*add to the output thingy ($) list. */
!.p= !.p + 1 /*bump the thingy pointer in pile P. */
end /*k*/ /* [↑] each iteration finds a low item*/
/* [↓] string $ has a leading blank.*/
say 'output: ' strip($) /*stick a fork in it, we're all done. */</lang>
- output when using the input of: 4 65 2 -31 0 99 83 782 7.88 1e1 1
input: 4 65 2 -31 0 99 83 782 7.88 1e1 1 output: -31 0 1 2 4 7.88 1e1 65 83 99 782
- output when using the input of: dog cow cat ape ant man pterodactyl
input: dog cow cat ape ant man pterodactyl output: ant ape cat cow dog man pterodactyl
Ruby
<lang ruby>class Array
def patience_sort
piles = []
each do |i|
if (idx = piles.index{|pile| pile.last <= i})
piles[idx] << i
else
piles << [i] #create a new pile
end
end
# merge piles
result = []
until piles.empty?
first = piles.map(&:first)
idx = first.index(first.min)
result << piles[idx].shift
piles.delete_at(idx) if piles[idx].empty?
end
result
end
end
a = [4, 65, 2, -31, 0, 99, 83, 782, 1] p a.patience_sort</lang>
- Output:
[-31, 0, 1, 2, 4, 65, 83, 99, 782]
Scala
<lang Scala>import scala.collection.mutable
object PatienceSort extends App {
def sort[A](source: Iterable[A])(implicit bound: A => Ordered[A]): Iterable[A] = {
val piles = mutable.ListBuffer[mutable.Stack[A]]()
def PileOrdering: Ordering[mutable.Stack[A]] =
(a: mutable.Stack[A], b: mutable.Stack[A]) => b.head.compare(a.head)
// Use a priority queue, to simplify extracting minimum elements. val pq = new mutable.PriorityQueue[mutable.Stack[A]]()(PileOrdering)
// Create ordered piles of elements
for (elem <- source) {
// Find leftmost "possible" pile
// If there isn't a pile available, add a new one.
piles.find(p => p.head >= elem) match {
case Some(p) => p.push(elem)
case _ => piles += mutable.Stack(elem)
}
}
pq ++= piles
// Return a new list, by taking the smallest stack head
// until all stacks are empty.
for (_ <- source) yield {
val smallestList = pq.dequeue
val smallestVal = smallestList.pop
if (smallestList.nonEmpty) pq.enqueue(smallestList)
smallestVal
}
}
println(sort(List(4, 65, 2, -31, 0, 99, 83, 782, 1)))
}</lang>
Sidef
<lang ruby>func patience(deck) {
var stacks = [];
deck.each { |card|
given (stacks.first { card < .last }) { |stack|
case (defined stack) {
stack << card
}
default {
stacks << [card]
}
}
}
gather {
while (stacks) {
take stacks.min_by { .last }.pop
stacks.grep!{ !.is_empty }
}
}
}
var a = [4, 65, 2, -31, 0, 99, 83, 782, 1] say patience(a)</lang>
- Output:
[-31, 0, 1, 2, 4, 65, 83, 99, 782]
Standard ML
<lang sml>structure PilePriority = struct
type priority = int fun compare (x, y) = Int.compare (y, x) (* we want min-heap *) type item = int list val priority = hd
end
structure PQ = LeftPriorityQFn (PilePriority)
fun sort_into_piles n =
let
val piles = DynamicArray.array (length n, [])
fun bsearch_piles x =
let
fun aux (lo, hi) =
if lo > hi then
lo
else
let
val mid = (lo + hi) div 2
in
if hd (DynamicArray.sub (piles, mid)) < x then
aux (mid+1, hi)
else
aux (lo, mid-1)
end
in
aux (0, DynamicArray.bound piles)
end
fun f x =
let
val i = bsearch_piles x
in
DynamicArray.update (piles, i, x :: DynamicArray.sub (piles, i))
end
in
app f n;
piles
end
fun merge_piles piles =
let
val heap = DynamicArray.foldl PQ.insert PQ.empty piles
fun f (heap, acc) =
case PQ.next heap of
NONE => acc
| SOME (x::xs, heap') =>
f ((if null xs then heap' else PQ.insert (xs, heap')),
x::acc)
in
rev (f (heap, []))
end
fun patience_sort n =
merge_piles (sort_into_piles n)</lang>
Usage:
- patience_sort [4, 65, 2, ~31, 0, 99, 83, 782, 1]; val it = [~31,0,1,2,4,65,83,99,782] : int list
Tcl
This uses the -bisect option to lsearch in order to do an efficient binary search (in combination with -index end, which means that the search is indexed by the end of the sublist).
<lang tcl>package require Tcl 8.6
proc patienceSort {items} {
# Make the piles
set piles {}
foreach item $items {
set p [lsearch -bisect -index end $piles $item] if {$p == -1} { lappend piles [list $item] } else { lset piles $p end+1 $item }
}
# Merge the piles; no suitable builtin, alas
set indices [lrepeat [llength $piles] 0]
set result {}
while 1 {
set j 0 foreach pile $piles i $indices { set val [lindex $pile $i] if {$i < [llength $pile] && (![info exist min] || $min > $val)} { set k $j set next [incr i] set min $val } incr j } if {![info exist min]} break lappend result $min unset min lset indices $k $next
} return $result
}</lang> Demonstrating: <lang tcl>puts [patienceSort {4 65 2 -31 0 99 83 782 1}]</lang>
- Output:
-31 0 1 2 4 65 83 99 782
Wren
<lang ecmascript>import "/sort" for Cmp
var patienceSort = Fn.new { |a|
var size = a.count
if (size < 2) return
var cmp = Cmp.default(a[0])
var piles = []
for (e in a) {
var outer = false
for (pile in piles) {
if (cmp.call(pile[-1], e) > 0) {
pile.add(e)
outer = true
break
}
}
if (!outer) piles.add([e])
}
for (i in 0...size) {
var min = piles[0][-1]
var minPileIndex = 0
for (j in 1...piles.count) {
if (cmp.call(piles[j][-1], min) < 0) {
min = piles[j][-1]
minPileIndex = j
}
}
a[i] = min
var minPile = piles[minPileIndex]
minPile.removeAt(-1)
if (minPile.count == 0) piles.removeAt(minPileIndex)
}
}
var ia = [4, 65, 2, -31, 0, 99, 83, 782, 1] patienceSort.call(ia) System.print(ia)
var ca = ["n", "o", "n", "z", "e", "r", "o", "s", "u", "m"] patienceSort.call(ca) System.print(ca)
var sa = ["dog", "cow", "cat", "ape", "ant", "man", "pig", "ass", "gnu"] patienceSort.call(sa) System.print(sa)</lang>
- Output:
[-31, 0, 1, 2, 4, 65, 83, 99, 782] [e, m, n, n, o, o, r, s, u, z] [ant, ape, ass, cat, cow, dog, gnu, man, pig]
zkl
<lang zkl>fcn patienceSort(ns){
piles:=L();
foreach n in (ns){ newPile:=True; // create list of sorted lists
foreach p in (piles){
if(n>=p[-1]) { p.append(n); newPile=False; break; }
}
if(newPile)piles.append(L(n));
}
// merge sort the piles
r:=Sink(List); while(piles){
mins:=piles.apply("get",0).enumerate();
min :=mins.reduce(fcn(a,b){ (a[1]<b[1]) and a or b },mins[0])[0];
r.write(piles[min].pop(0));
if(not piles[min]) piles.del(min);
}
r.close();
}</lang> <lang zkl>T(T(3,2,6,4,3,5,1),
T(4,65,2,-31,0,99,83,782,1), T(0,8,4,12,2,10,6,14,1,9,5,13,3,11,7,15), "foobar")
.pump(Console.println,patienceSort);</lang>
- Output:
L(1,2,3,3,4,5,6)
L(-31,0,1,2,4,65,83,99,782)
L(0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15)
L("a","b","f","o","o","r")