i-Blue的专栏

Given two strings s and t which consist of only lowercase letters.String t is generated by random shuffling string s and then add one more letter at a random position.Find the letter that was

Given an array of integers, every element appears twice except for one. Find that single one.Note:Your algorithm should have a linear runtime complexity. Could you implement it without using ext

Given an integer, write a function to determine if it is a power of three.Follow up:Could you do it without using any loop / recursion?代码：class Solution {public: bool isPowerOfThree(i

Given a non-empty array of numbers, a0, a1, a2, … , an-1, where 0 ≤ ai < 231.Find the maximum result of ai XOR aj, where 0 ≤ i, j n.Could you do this in O(n) runtime?Example:Input:

转：http://blog.youkuaiyun.com/wujingjing_crystal/article/details/52792286    http://www.cnblogs.com/youxin/p/3349834.html1. 给定一个数组，其中只有一个数出现一次，别的数都出现3次，找出这个数题目描述给定一个数组，其中只有一个数x出现一次，别的数都出现3次，找出这