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题目链接: https://leetcode.com/problems/sum-of-two-integers/ Calculate the sum of two integers a and b, but you are not allowed to use the operator + and -. Example: Given a = 1 and b = 2, retu

原文网址：http://my.oschina.net/Tsybius2014/blog/497645 1、题目名称 Add Digits （非负整数各位相加） 2、题目地址 https://leetcode.com/problems/add-digits 3、题目内容 英文：Given a non-negative integer num, repeatedly add all its

题目：Given an integer array of size n, find all elements that appear more than ⌊ n/3 ⌋ times. The algorithm should run in linear time and in O(1) space.思路：首先，我们来看一下怎样求众数，也就是元素出现大于⌊ n/2 ⌋的数。我们注意到这样一个现象： 在

Problem: Given a linked list, determine if it has a cycle in it. Follow up: Can you solve it without using extra space? https://oj.leetcode.com/problems/linked-list-cycle/ Problem II: Gi

Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. 在一个数组中，出现次数大于n/2次数的只可能有一个。开始时count为0，如果数组中的数和candidate相同，则加1。如果不同，则减1。cla