Python 计算两个长整数(由字符串表示)之和，结果也返回字符串
def calcusum(s1, s2): # 计算两个长整数(由字符串表示)之和，结果也返回字符串 size1, size2 = len(s1), len(s2) index1, index2 = size1 - 1, size2 - 1 res = "" tmp = 0 while index1 > -1 and index2 > -1: tmp += int(s1[index1]) + int(
