Find Duplicate Subtrees [leetcode]652. Find Duplicate Subtrees Analysis 今天开心呀,明天放假也开心呀—— [每天刷题并不难0.0] Given a binary tree, return all duplicate subtrees. For each kind of duplicate subtrees, you only nee
Given the intuition, the algorithm follows fairly simply. First, we sort the array, and then we compare each element to the previous element. Because there is exactly one duplicated element in the array, we know that the array is of at least length 2, and we can return the duplicate elem...
Given an integer n, returnanyarray containing nuniqueintegers such that they add up to 0. Example 1: Input: n = 5 Output: [-7,-1,1,3,4] Explanation: These arrays also are accepted [-5,-1,1,2,3] , [-3,-1,2,-2,4]. 1. 2. 3. Example 2: ...
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[435. 无重叠区间](https://leetcode-cn.com/problems/non-overlapping-intervals/) 一维 方法一、模拟 方法二、并查集 [1569. 将子数组重新排序得到同一个二叉查找树的方案数](https://leetcode.cn/problems/number-of-ways-to-reorder-array-to-get-same-bst/) [LCS 03. 主题空间](https://leetcode.cn...
Given an array of integers, find t... 夜读春秋 0 100 LeetCode.1207-唯一的元素出现次数(Unique Number of Occurrences) 2019-10-08 09:10 − 这是小川的第419次更新,第452篇原创 ## 看题和准备 今天介绍的是**LeetCode**算法题中**Easy**级别的第**269**题(顺位题号是**1207**)。给定...
LeetCode 1506. Find Root of N-Ary Tree(异或) 1. 题目 1. 题目 Given all the nodes of an N-ary tree as an array Node[] tree where each node has aunique value. Find and return the root of the N-ary tree. Follow up: Could you solve this problem inconstant spacecomplexity with a...
1980-Find-Unique-Binary-String.py 1980-find-unique-binary-string.py 1985-Find-The-Kth-Largest-Integer-In-The-Array.py 1985-find-the-kth-largest-integer-in-the-array.py 2013-Detect-Squares.py 2013-detect-squares.py 2017-Grid-Game.py 2017-grid-game.py 232-Implement-...
0387-First-Unique-Character-In-String 0394-Decode-String 0407-Trapping-Rain-Water-II 0445-Add-Two-Numbers-II 0447-Number-of-Boomerangs 0454-4Sum-II 0461-hamming-distance 0477-total-hamming-distance 0530-minimum-absolute-difference-in-bst 0540-Single-Element-in-a-Sorted-Array 0642...
https://leetcode.com/problems/find-duplicate-file-in-system/description/题目大意:输出系统中文件内容相同的文件名。Given a list of directory info including directory path, and all the files with contents in this directory, you need to find out all the groups of duplicate files in the file ...