摘要： Given an integer array, find a subarray where the sum of numbers is zero. Your code should return the index of the first number and the index of the l... 阅读全文

摘要： Given a string which contains only letters. Sort it by lower case first and upper case second.NoteIt's not necessary to keep the original order of low... 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