# _Author:huang# date: 2017/11/28 # 字符串 '''print("hello" * 3)print("hello world"[2:]) print("llo" in "hello world") print(123 in [1232,123,345]) print("Huang is a good teacher")print("%s is a good tea…
Given two non-negative integers num1 and num2 represented as string, return the sum of num1 and num2. Note: The length of both num1 and num2 is < 5100. Both num1 and num2 contains only digits 0-9. Both num1 and num2 does not contain any leading zero.…