CR2014

摘要： Given two binary strings, return their sum (also a binary string). For example, a = "11" b = "1" Return "100". 思路：二进制加法计算的步骤： 1、将二进制转化成字符串的形式，这样从高位到地位 阅读全文

摘要： 题目：Given a non-negative integer num, repeatedly add all its digits until the result has only one digit. For example: Given num = 38, the process is li 阅读全文