Problem DescriptionWe divide the HZNU Campus into N*M grids. As you can see from the picture below, the green grids represent the buidings. Given the size of t...
Given an array of strings, group anagrams together. For example, given: ["eat", "tea", "tan", "ate", "nat", "bat"], Return:[ ["ate", "eat","tea"], ["na......
Given n non-negative integers representing an elevation map where the width of each bar is 1, compute how much water it is able to trap after raining. For exa...