发布时间：2015-03-15 10:43:01
Given a matrix of m x n elements (m rows, n columns), return all elements of the matrix in spiral order.For example,Given the following matrix:[ [ 1, 2, 3 ], [ 4, 5, 6 ], [ 7, 8, 9 ]]You should return [1,2,3,6,9,8,7,4,5].public static List<Integer> spiralOrder(int[][] matr.........【阅读全文】
发布时间：2015-03-07 11:10:30
Given a set of candidate numbers (C) and a target number (T), find all unique combinations in C where the candidate numbers sums to T.The same repeated number may be chosen from C unlimited number of times.Note:All numbers (including target) will .........【阅读全文】
发布时间：2015-03-05 09:16:01
Write a function to find the longest common prefix string amongst an array of strings.public class LongestCommonPrefix {public String longestCommonPrefix(String[] strs) {if(strs.length==0)return "";String tempString=strs[0]; for (int i = 1; i < strs.length; i++) { i.........【阅读全文】
发布时间：2015-01-30 12:35:29
Two elements of a binary search tree (BST) are swapped by mistake.Recover the tree without changing its structure.Note:A solution using O(n) space is pretty straight forward. Could you devise a constant space solution?二叉排序树中有两个节点被交换了，要求把树恢复成二叉排序树。中序遍历二叉树生.........【阅读全文】
发布时间：2015-01-29 12:39:56
/You are given an n x n 2D matrix representing an image.////Rotate the image by 90 degrees (clockwise).////Follow up://Could you do this in-place?矩阵旋转问题：先对正对角线轴对称，在对垂直最中间的线轴对称。public class RotateImage {public void rotate(int[][] matrix) {int row=matrix.length.........【阅读全文】
