题解 | 高精度整数加法

a = input()
b = input()

la = len(a)
lb = len(b)
jinwei = 0
if la-lb < 0:
    a = "0"*(lb-la)+a
elif la-lb > 0:
    b = "0"*(la-lb)+b

a = list(map(int, a))
a.reverse()
b = list(map(int, b))
b.reverse()
res = []
for i in range(len(a)):
    cur = a[i]+b[i]+jinwei
    if (cur >= 10):
        jinwei = 1
        cur %= 10
    else:
        jinwei = 0
    res.append(cur)
else:
    if jinwei == 1:
        res.append(1)
print("".join(reversed([str(i) for i in res])))