Maximum triangle path sum: Difference between revisions
→{{header|Haskell}}: Added a ZipList variant
(Added Applesoft BASIC, Chipmunk Basic, GW-BASIC, MSX Basic, QBasic and PureBasic) |
(→{{header|Haskell}}: Added a ZipList variant) |
||
Line 1,854:
. foldr1
((<*> tail) . zipWith3 (\x y z -> x + max y z))
--------------------------- TEST -------------------------
main :: IO ()
main =
print $
maxPathSum
[ [55],
[94, 48],
[95, 30, 96],
[77, 71, 26, 67],
[97, 13, 76, 38, 45],
[07, 36, 79, 16, 37, 68],
[48, 07, 09, 18, 70, 26, 06],
[18, 72, 79, 46, 59, 79, 29, 90],
[20, 76, 87, 11, 32, 07, 07, 49, 18],
[27, 83, 58, 35, 71, 11, 25, 57, 29, 85],
[14, 64, 36, 96, 27, 11, 58, 56, 92, 18, 55],
[02, 90, 03, 60, 48, 49, 41, 46, 33, 36, 47, 23],
[92, 50, 48, 02, 36, 59, 42, 79, 72, 20, 82, 77, 42],
[56, 78, 38, 80, 39, 75, 02, 71, 66, 66, 01, 03, 55, 72],
[44, 25, 67, 84, 71, 67, 11, 61, 40, 57, 58, 89, 40, 56, 36],
[85, 32, 25, 85, 57, 48, 84, 35, 47, 62, 17, 01, 01, 99, 89, 52],
[06, 71, 28, 75, 94, 48, 37, 10, 23, 51, 06, 48, 53, 18, 74, 98, 15],
[27, 02, 92, 23, 08, 71, 76, 84, 15, 52, 92, 63, 81, 10, 44, 10, 69, 93]
]</syntaxhighlight>
{{Out}}
<pre>1320</pre>
ZipList variant:
<syntaxhighlight lang="haskell">import Control.Applicative (ZipList (ZipList, getZipList))
---------------- MAXIMUM TRIANGLE PATH SUM ---------------
maxPathSum :: [[Int]] -> Int
maxPathSum triangleRows =
head
( foldr1
( \xs ->
( \ys zs ->
getZipList
( ( ( (\x y z -> x + max y z)
<$> ZipList xs
)
<*> ZipList ys
)
<*> ZipList zs
)
)
<*> tail
)
triangleRows
)
--------------------------- TEST -------------------------
| |||