text: from util import memoize
  
  triangle = """
  75
  95 64
  17 47 82
  18 35 87 10
  20 04 82 47 65
  19 01 23 75 03 34
  88 02 77 73 07 63 67
  99 65 04 28 06 16 70 92
  41 41 26 56 83 40 80 70 33
  41 48 72 33 47 32 37 16 94 29
  53 71 44 65 25 43 91 52 97 51 14
  70 11 33 28 77 73 17 78 39 68 17 57
  91 71 52 38 17 14 91 43 58 50 27 29 48
  63 66 04 68 89 53 67 30 73 16 69 87 40 31
  04 62 98 27 23 09 70 98 73 93 38 53 60 04 23
  """
  
  numbers = [[int(s) for s in line.split()]
             for line in triangle.strip().splitlines()]
  height = len(numbers)
  
  @memoize
  def max_total(y, x):
      if y >= height:
          return 0
      return numbers[y][x] + max(max_total(y + 1, x), max_total(y + 1, x + 1))
  
  def solve():
      return max_total(0, 0)
  
  if __name__ == '__main__':
      print solve()
  