import time
start = time.time()
tri = '''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'''.split('\n')

for x in range(len(tri)):
    tri[x] = tri[x].split(' ')
    for y in range(len(tri[x])):
        tri[x][y] = int(tri[x][y])

for u in range(len(tri)-2,-1,-1):
    for v in range(len(tri[u])):
        if tri[u][v]+tri[u+1][v]>tri[u][v]+tri[u+1][v+1]:
            tri[u][v] = tri[u][v]+tri[u+1][v]
        else:
            tri[u][v] = tri[u][v]+tri[u+1][v+1]

print(tri[0][0])
print(time.time()-start)
