题解 | #高精度整数加法#

import sys

num1=None
for j, line in enumerate(sys.stdin):
    if j%2==0:
        num1=line[:-1][::-1]
    else:
        num2=line[:-1][::-1]

        len1=len(num1)
        len2=len(num2)
        result=[]

        if len1>len2:
            num2=list(num2)+['0']*(len1-len2)
        else:
            num1=list(num1)+['0']*(len2-len1)

        up=0
        for i in range(len(num1)):
            a1=ord(num1[i])-ord('0')
            a2=ord(num2[i])-ord('0')
            if a1+a2+up<10:
                result.append(chr(a1+a2+up+ord('0')))
                up=0
            elif a1+a2+up>=10 and i==len(num1)-1:
                result.append(chr(a1+a2+up-10+ord('0')))
                result.append('1')
            else:
                result.append(chr(a1+a2+up-10+ord('0')))
                up=1

#         print(result)
        print(''.join(result[::-1]))