Every integer representedinthe 2D-array will be between1and N,whereNisthe size of the input array. 题解:我是用并查集解的。对于每一条边的两个结点,如果他们的爸爸不是同一个爸爸,那么就 unoin 这两个结点,如果他们两个的爸爸是同一个爸爸,就说明这条边多余了,直接返回这条边就行了。 View Code ...
My method: weighted union find with hashmap; Solution 1 classSolution {//union findclassQuickUnion {//with arrayHashMap<Integer, Integer> map =newHashMap<>();//id, parentHashMap<Integer, Integer> sz =newHashMap<>();//id sizeintcount;//how many componentsQuickUnion(int[] nums){ count...
第四章 LeetCode 题解 0001~0099 0100~0199 0200~0299 0300~0399 0400~0499 0500~0599 0600~0699 0700~0799 0800~0899 0900~0999 1000~1099 1100~1199 1200~1299 1300~1399 1400~1499 1500~1599 1600~1699 1700~1799 1800~1899 1900~1999 2000~2099 ...
🎭 PsuendoCode 🧩 Bit Manipulation Pattern 🧩 ⏰: O(1) 🪐: O(1) return (n & (n - 1)) == 0; ❓ FIND UNIQUE NUMBER IN ARRAY OF PAIRS 🐣 Single Number, Find the Missing Number, Find the Duplicate Number, Find the Corrupt Pair, etc. 2️⃣ Bitwise AND 🎭 Psu...
[LeetCode] Add Strings 字符串相加 Given two non-negative numbers num1 and num2 represented as string, return the sum of num1 and num2. Note: The length of both num1 and num2 is < 5100. Both num1 and num2 contains only digits 0-9. Both num1 and num2 does not contain any leadi...
[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...
【LeetCode】947. Most Stones Removed with Same Row or Column 移除最多的同行或同列石头(Medium)(JAVA) 题目地址: https://leetcode.com/problems/minimum-increment-to-make-array-unique/ 题目描述: On a 2D plane, we place n stones...猜
// - [952. 按公因数计算最大组件大小](https://leetcode.cn/problems/largest-component-size-by-common-factor/) 2272 // 下标距离有上界 https://codeforces.com/contest/1978/problem/F // - [1998. 数组的最大公因数排序](https://leetcode.cn/problems/gcd-sort-of-an-array/) 2429 ...
//leetcode.com/discuss/interview-question/914249/Uber-or-Phone-or-Union-and-Intersection-of-Two-Sorted-Interval-Lists */ public class UnionAndIntersectionOfTwoSortedIntervalLists { public static void main(String[] args) { } public int[][] intersectionOfTwoIntervals(int[][] a, int[][] b) ...
leetcode 1266. Minimum Time Visiting All Points 2019-11-24 21:40 − On a plane there are n points with integer coordinates points[i] = [xi, yi]. Your task is to find the minimum time in seconds to visit a... 琴影 0 624 [LC] 442. Find All Duplicates in an Array 2019...