1. Different tree nodes may share the same value, so for easier implemenation, do a dfs or bfs to relabel all N nodes from 0 to N - 1. 2. Convert the given binary tree to an undirected graph, either by dfs or bfs. Save all the leaf tree nodes during this conversion. 3. For e...
Given the root of a binary tree and an integer distance. A pair of two different leaf nodes of a binary tree is said to be good if the length of the shortest path between them is less than or equal to distance. Return the number of good leaf node pairs in the tree. Example 1: AI...
package leetcode import "math/bits" func countPrimeSetBits(L int, R int) int { counter := 0 for i := L; i <= R; i++ { if isPrime(bits.OnesCount(uint(i))) { counter++ } } return counter } func isPrime(x int) bool { return x == 2 || x == 3 || x == 5 ...
本文原题:LeetCode. 给定n, 求解独特二叉搜寻树 (binary search trees) 的个数. 什么是二叉搜寻树? 二叉查找树(Binary Search Tree),或者是一棵空树,或者是具有下列性质的二叉树: 若它的左子树不空,则左子树上所有结点的值均小于它的根结点的值; 若它的右子树不空,则右子树上所有结点的值均大于它的根结点...
LeetCode 1342. Number of Steps to Reduce a Number to Zero [Easy] LeetCode 1342. Number of Steps to Reduce a Number to Zero 链接: https://leetcode.com/problems/number-of-steps-to-reduce-a-number-to-zero/ 题目描述: Given a non-negative integer num, return the number......
今天介绍的是LeetCode算法题中Easy级别的第188题(顺位题号是806)。我们要将给定字符串S的字母从左到右写成行。每行最大宽度为100个单位,如果写一个字母会导致该行的宽度超过100个单位,则会写入下一行。给出一个数组宽度,一个数组,其中widths[0]是'a'的宽度,widths[1]是'b'的宽度,widths[25]是'z'的宽度...
215.Kth_largest_element_in_an_array 2164.sort_even_and_odd_indices_independently 217.contains_duplicate 219.contains_duplicate_II 2215.find_the_difference_of_two_arrays 222.count_complete_tree_nodes 226.invert_binary_tree 230.Kth_smallest_element_in_a_bst 2300.successfule...
LeetCode :Given a binary tree, find its maximum depth. (二叉树的最大深度) 题目描述: Given a binary tree, find its maximum depth. The maximum depth is the number of nodes along the longest path from the root node down to the farthest leaf node. 解题思路: 第一种是递归方法:每个二叉树...
0025-reverse-nodes-in-k-group.cpp 0026-remove-duplicates-from-sorted-array.cpp 0027-remove-element.cpp 0028-find-the-index-of-the-first-occurrence-in-a-string.cpp 0033-search-in-rotated-sorted-array.cpp 0034-find-first-and-last-position-of-element-in-sorted-array.cpp 0035-search-insert-pos...
24 【leetcode刷题】谷歌亚麻脸书面经——Delete Nodes In Binary Tree 10:44 【leetcode刷题】谷歌亚麻脸书面经——Bad Commits 08:19 Leetcode刷题讲解——Two Sum系列(一) 23:42 Leetcode刷题讲解一Two Sum系列(三) 17:11 Leetcode刷题讲解一Two Sum系列(二) 12:39 超真实CS模拟面试现场|谷歌面试官...