intend,inttarget,int[]nums){// length表示长度 index表示下标intlength=end-start+1;intindex=0;if...
Our top interview questions are divided into the following series: Easy Collection Medium Collection Hard Collection to help you master Data Structure & Algorithms and improve your coding skills. Just like any other skills, coding interview is one area where you can greatly improve with deliberate ...
// 从递归的方法来看生成多棵树publicList<TreeNode>generateTrees(intn){returnuseGetTree_1(1,n); }privateList<TreeNode>useGetTree_1(intstart,intend){ List<TreeNode> all_trees =newArrayList<>();if(start > end) { all_trees.add(null);returnall_trees; }for(intvalue=start; value <= end;...
You need to return the indices of these two numbers, where indices start from 0. The indices of the two numbers cannot be the same, and there is exactly one solution for each input. Suppose you have an array nums = [2, 7, 11, 15], and the target number is target = 9. To find...
Given an array where elements are sorted in ascending order, convert it to a height balanced BST. For this problem, a height-balanced binary tree is defined as a binary tree in which the depth of the two subtrees of every node never differ by more than 1. ...
voidrotate(vector<int>&nums,int k){k%=nums.size();reverse(nums,0,nums.size()-1);reverse(nums,0,k-1);reverse(nums,k,nums.size()-1);}voidreverse(vector<int>&nums,int start,int end){int temp;while(start<end){temp=nums[start];nums[start]=nums[end];nums[end]=temp;start++;end...
颜色填充。编写函数,实现许多图片编辑软件都支持的“颜色填充”功能。给定一个屏幕(以二维数组表示,元素为颜色值)、一个点和一个新的颜色值,将新颜色值填入这个点的周围区域,直到原来的颜色值全都改变。 示例1: 输入: image = [[1,1,1],[1,1,0],[1,0,1]] sr = 1, sc = 1, newColor = 2 输...
Now that we've got all the basic Array operations out of the way, we're going to have a look at in-place Array operations. These are very important from an interviewing standpoint. In-place Array operations are where we modify an Array, without creating a new Array. We've already seen...
Given an integern, return all distinct solutions to then-queens puzzle. Each solution contains a distinct board configuration of then-queens' placement, where'Q'and'.'both indicate a queen and an empty space respectively. For example,
1284 Minimum Number of Flips to Convert Binary Matrix to Zero Matrix 72.1% Hard 1285 Find the Start and End Number of Continuous Ranges 88.2% Medium 1286 Iterator for Combination 73.5% Medium 1287 Element Appearing More Than 25% In Sorted Array Go 59.5% Easy 1288 Remove Covered Intervals...