while(!que.empty()){ //只要还有问题,就继续这个循环 question top = que.top(); que.pop(); vector<question> similars = solve(top); //解决当前的top问题,AC之后会得到与当前问题相似的一些问题; for(auto sim : similars){ if(is_good_question(sim)) que.push(sim); // 遍历所有相似的问...
Understand how to convert recursive solutions to iterative ones and vice versa.了解如何将递归解决方案...
转载自:LeetCode Question Difficulty Distribution 1 Two Sum 2 5 array sort set Two Pointers 2 Add Two Numbers 3 4 linked list Two Pointers Math 3 Longest Substring Without Repeating Characters 3 2 string Two Pointers hashtable 4 Median of Two Sorted Arrays 5 3 array Binary Search 5 Longest ...
Both the trees follow a top-down greedy approach known as recursive binary splitting. We call it as ‘top-down’ because it begins from the top of tree when all the observations are available in a single region and successively splits the predictor space into two new branches down the tree...
Question 2 Binary Tree Postorder Traversal Given a binary tree, return thepostordertraversal of its nodes' values. For example: Given binary tree{1,#,2,3}, 1 \ 2 / 3 return[3,2,1]. Note: Recursive solution is trivial, could you do it iteratively?
Question 3 Max Points on a Line Givennpoints on a 2D plane, find the maximum number of points that lie on the same straight line. To determine whether a point is in a defined line is by the slope between this point and the defined point. So we need to iterate the point[] array for...
This question requires to return a possible solution. LeetCode 269 Alien Dictionary Hard Extend to 210 Course Schedule II. The question changes the way it gives the graph. We need to determine the from -> to pair by comparing words[i] and words[i+1]; For the first time we find a ...
Question Given a binary tree, return the postorder traversal of its nodes’ values. For example: Given binary tree {1,#,2,3}, 1 \ 2 / 3 return [3,2,1]. Note:Recursive solution is trivial, could you do it iteratively?
Question Given two binary strings, return their sum (also a binary string). For example, a = "11" b = "1" Return "100". 本题难度Easy。但是不要小觑。 【复杂度】
Question 1. Convert Sorted Array to Binary Search Tree Given an array where elements are sorted in ascending order, convert it to a height balanced BST. Remember the middle index value should be the first node, while the left-side array be the node.right part and the right-side array be...