maxPathSum :: [[Int]] -> Int
maxPathSum = head . foldr1 ((<*> tail) . zipWith3 (\x y z -> x + max y z))

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]
    ]