摘要：
Given an integer matrix, find a submatrix where the sum of numbers is zero. Your code should return the coordinate of the left-up and right-down numbe 阅读全文
摘要：
Given an integer array, find a subarray with sum closest to zero. Return the indexes of the first number and last number. Example Given [-3, 1, 1, -3, 阅读全文
摘要：
Given an integer n, generate a square matrix filled with elements from 1 to n^2 in spiral order. Example Given n = 3, You should return the following 阅读全文
摘要：
Given a matrix of m x n elements (m rows, n columns), return all elements of the matrix in spiral order. Example Given the following matrix: [ [ 1, 2, 阅读全文
摘要：
Sort a linked list in O(n log n) time using constant space complexity. Example Given 1-3->2->null, sort it to 1->2->3->null. /** * Definition for List 阅读全文
摘要：
Given a string which contains only letters. Sort it by lower case first and upper case second. Notice It's NOT necessary to keep the original order of 阅读全文
摘要：
Given an array of n objects with k different colors (numbered from 1 to k), sort them so that objects of the same color are adjacent, with the colors 阅读全文
摘要：
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, 阅读全文
摘要：
Given 2*n + 2 numbers, every numbers occurs twice except two, find them. Example Given [1,2,2,3,4,4,5,3] return 1 and 5 Given [1,2,2,3,4,4,5,3] return 阅读全文
摘要：
Given 3*n + 1 numbers, every numbers occurs triple times except one, find it. Example Given [1,1,2,3,3,3,2,2,4,1] return 4 Given [1,1,2,3,3,3,2,2,4,1] 阅读全文
摘要：
Given an absolute path for a file (Unix-style), simplify it. Example "/home/", => "/home" "/a/./b/../../c/", => "/c" "/home/", => "/home" "/a/./b/../. 阅读全文
摘要：
Given a m x n matrix, if an element is 0, set its entire row and column to 0. Do it in place. Example Given a matrix [ [1,2], [0,3] ], return[[0,2],[0 阅读全文