题解 | #高精度整数加法#

while True:
    try:
        s1, s2 = input(), input()
        l1, l2 = len(s1), len(s2)
        if l1 < l2:
            s1 = '0' * (l2-l1) + s1
        elif l1 > l2:
            s2 = '0' * (l1-l2) + s2
        lst1, lst2 = [int(i) for i in s1[::-1]], [int(j) for j in s2[::-1]]
        l, res, m = len(lst1), [], 0
        for i in range(l):
            n = (lst1[i] + lst2[i] + m) % 10
            m = (lst1[i] + lst2[i] + m) // 10
            res.append(n)
        if m:
            res.append(m)
        print(''.join(map(str, reversed(res))))
    except:
        break