Solve hanging lantern problem: Difference between revisions
Created Nim solution.
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(Created Nim solution.) |
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There are 65191584694745586153436251091200000 ways to take these 9 columns down.
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=={{header|Nim}}==
Recursive solution.
The number of elements in the columns are provided as command arguments.
<syntaxhighlight lang="Nim">import std/[os, strutils]
proc sequenceCount(columns: var seq[int]): int =
for icol in 1..columns.high:
if columns[icol] > 0:
dec columns[icol]
inc result, sequenceCount(columns)
inc columns[icol]
if result == 0: result = 1
let ncol = paramCount()
if ncol == 0:
quit "Missing parameters.", QuitFailure
var columns = newSeq[int](ncol + 1) # We will ignore the first column.
for i in 1..ncol:
let n = paramStr(i).parseInt()
if n < 0:
quit "Wrong number of lanterns.", QuitFailure
columns[i] = n
echo columns.sequenceCount()
</syntaxhighlight>
=={{header|Pascal}}==
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