def trace(pick, triangle):
    path = triangle.pop(0)
    for line in triangle:
        path = list(map(lambda x: pick(x[0], x[1]) + x[2], zip(path, path[1:], line)))
    return path[0]

print(trace(max,list(reversed([
[75],
[95, 64],
[17, 47, 82],
[18, 35, 87, 10],
[20,  4, 82, 47, 65],
[19,  1, 23, 75,  3, 34],
[88,  2, 77, 73,  7, 63, 67],
[99, 65,  4, 28,  6, 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,  4, 68, 89, 53, 67, 30, 73, 16, 69, 87, 40, 31],
[ 4, 62, 98, 27, 23,  9, 70, 98, 73, 93, 38, 53, 60,  4, 23]]))))