1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
l1 = list(input())
l2 = list(input())

if len(l1) > len(l2):
  l1 = [0] + l1
  for i in range(len(l1) - len(l2)):
    l2 = [0] + l2
else:
  l2 = [0] + l2
  for i in range(len(l2) - len(l1)):
    l1 = [0] + l1

n = len(l1)

for i in range(n):
  l1[i] = int(l1[i])
  l2[i] = int(l2[i])

# print("l1:", l1, "\nl2:", l2)

for i in reversed(range(1, n)):
  l1[i] = l1[i] + l2[i]
  if l1[i] >= 10:
    l1[i] = l1[i] % 10
    l1[i - 1] += 1
    # print(l1)

while l1[0] == 0:
  del(l1[0])

out = ""
for i in range(len(l1)):
  out = out + str(l1[i])

print(out)