problem_0018.py

import time

txt = """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"""

start = time.time()
txt = txt.split("\n")

lst = []

for i in range(len(txt)):
    k = txt[i].split(" ")
    new = []
    for j in k:
        new.append(int(j))
    lst.append(new)


l = len(lst)

for i in range(1,l):
    lenofrow = len(lst[i])
    for j in range(lenofrow):
        if j == 0:
            lst[i][j] = lst[i][j] + lst[i-1][j]
        elif j == lenofrow-1:
            lst[i][j] = lst[i][j] + lst[i-1][j-1]
        else:
            lst[i][j] = lst[i][j] + max(lst[i-1][j-1], lst[i-1][j])

print(time.time()-start) # 0 seconds 
print(max(lst[-1])) # 1074