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