triangle = [
	[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]]

height = len(triangle)
memoize = [triangle[height-1]]
for i in range(height - 2, -1, -1):
	width = len(triangle[i])
	memoize.append([0] * width)
	for j in range(width):
		memoize[height - 1 - i][j] = triangle[i][j] + max(memoize[height - 2 - i][j], memoize[height - 2 - i][j+1])

print memoize[height - 1][0]
