题解 | #高精度整数加法#

while True:
    try:
        l_str = input()
        s_str = input()
        if len(l_str) < len(s_str):
            l_str, s_str = s_str, l_str
        s_str = "0" * (len(l_str) - len(s_str)) + s_str
        # print(l_str)
        # print(s_str)
        temp = 0
        lst = []
        for i in range(len(l_str) - 1, -1, -1):
            # print(l_str[i : i + 1],s_str[i : i + 1],temp)
            a = int(l_str[i : i + 1]) + int(s_str[i : i + 1]) + int(temp)
            if a > 9:
                temp = 1
            else:
                temp = 0
            lst.append(str(a)[-1])
        # print(lst)
        if int(temp) > 0:
            print(str(temp) + "".join(lst[::-1]))
        else:
            print("".join(lst[::-1]))
    except:
        break