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RSS订阅原创 [LeetCode OJ]75. Sort Colors
Given an array with n objects colored red, white or blue, sort them so that objects of the same color are adjacent, with the colors in the order red, white and blue. Here, we will use the integers
2016-08-26 15:25:19
436
原创 [LeetCode OJ]59. Spiral Matrix II
Given an integer n, generate a square matrix filled with elements from 1 to n2 in spiral order. For example, Given n = 3, You should return the following matrix: [ [ 1, 2, 3 ], [ 8, 9, 4 ], [
2016-08-26 14:47:33
412
原创 [LeetCode OJ]167. Two Sum II - Input array is sorted
Given an array of integers that is already sorted in ascending order, find two numbers such that they add up to a specific target number. The function twoSum should return indices of the two number
2016-08-25 23:25:36
225
原创 [LeetCode OJ]216. Combination Sum III
Find all possible combinations of k numbers that add up to a number n, given that only numbers from 1 to 9 can be used and each combination should be a unique set of numbers. 求出k个1~9数字组合之和为n的所有序列
2016-08-25 22:17:59
264
原创 [LeetCode OJ]Find Minimum in Rotated Sorted Array
https://oj.leetcode.com/problems/find-minimum-in-rotated-sorted-array/ 起初感觉这题挺水的，不就是遍历一遍找到最小值么？水过后系统提示解锁了Solution，点进去一看发现是我自己比较水。。。 人家给的是排序好的Array，你丫还O(n)不是丢人么。。。 思路如下： 数组[AL , AL+1,...,AR]，如果没有
2016-06-30 22:27:24
295
原创 [LeetCode OJ]Same Tree
题目意思依然很简单，判断两个二叉树是否相同 Given two binary trees, write a function to check if they are equal or not. Two binary trees are considered equal if they are structurally identical and the nodes have th
2013-11-14 23:58:21
491
原创 [LeetCode OJ]Single Number
Given an array of integers, every element appears twice except for one. Find that single one. 求数组中唯一一个没有重复出现两次的数 自己想了一会儿，没有好的想法，上网搜了下，只找到了找出没有重复出现的方法，一个很巧妙的方法是，利用异或算法： http://blog.youkuaiyun.com/
2013-11-14 23:30:26
654
原创 [LeetCode OJ]Maximum Depth of Binary Tree
一道简单的求二叉树的最大深度，还wrong了一次，没有考虑input为NULL的情况。。。 附上code： /** * Definition for binary tree * struct TreeNode { * int val; * TreeNode *left; * TreeNode *right; * TreeNode(int
2013-11-14 22:32:42
563
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