def input = @"
75
95 64
...
04 62 98 27 23 09 70 98 73 93 38 53 60 04 23";
 
// Transform into 2-dim array
def dataArr = input
  .Split(array[ Environment.NewLine ], StringSplitOptions.RemoveEmptyEntries)
  .Map(x => x.Split(' ').Map(int.Parse));
 
// Calculation cycles
for (mutable i = dataArr.Length - 1; i > 0; i--)
  for (mutable j = 0; j < dataArr[i].Length - 1; j++)
    dataArr[i - 1][j] += Max(dataArr[i][j], dataArr[i][j + 1]);
 
dataArr[0][0]