摘要： 原题链接在这里: https://leetcode.com/problems/add-binary/ 题目： Given two binary strings, return their sum (also a binary string). For example,a = "11"b = "1"R 阅读全文

摘要： 原题链接在这里：https://leetcode.com/problems/power-of-two/ 题目： Given an integer, write a function to determine if it is a power of two. 题解： bit manipulation, 阅读全文

摘要： 原题链接在这里：https://leetcode.com/problems/rectangle-area/ 题目： Find the total area covered by two rectilinear rectangles in a 2D plane. Each rectangle is d 阅读全文