A 2d grid map of m rows and n columns is initially filled with water. We may perform an addLand operation which turns the water at position (row, col) into a land. Given a list of positions to operate, count the number of islands after each addLand operation. An island is surrounded...
Leetcode: Number of Islands II && Summary of Union Find A 2d grid map of m rows and n columns is initially filled with water. We may perform an addLand operation which turns the water at position (row, col) into a land. Given a list of positions to operate, count the number of i...
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 ...
Leetcode-Amazon 200. Number of Islands - Union and Find.cpp onmaster User selector All users DatepickerAll time Commit History Commits on Mar 22, 2016 Create 200. Number of Islands - Union and Find.cpp ZengruiWangcommittedMar 22, 2016 ebbd662 End of commit history...
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[1489. 找到最小生成树里的关键边和伪关键边](https://leetcode.cn/problems/find-critical-and-pseudo-critical-edges-in-minimum-spanning-tree/) [2493. 将节点分成尽可能多的组](https://leetcode.cn/problems/divide-nodes-into-the-maximum-number-of-groups/) 7 [▲ 1632. 矩阵转换后的秩](https:...
Given a 2d grid map of '1' s (land) and '0' s (water), count the number of islands. An island is surrounded by water and is formed by connecting adjacent lands horizontally or vertically. You may assume all four edges of the grid are all surrounded by water. ...
LeetCode 547. Friend Circles Dylan_Java_NYC 2018-01-01 07:15 阅读:574 评论:0 推荐:0 LintCode Find the Weak Connected Component in the Directed Graph Dylan_Java_NYC 2017-02-04 12:06 阅读:561 评论:0 推荐:0 LeetCode 323. Number of Connected Components in an Undirected Graph Dyla...
如何将问题归约到union-find或者说union的目的是什么? 怎么union,即两个元素满足什么条件时可以union? >>两个元素有关联 https://leetcode.com/problems/surrounded-regions/ 此题debug了很久,一个20*20的case总是通不过,原因是oRoot的rank值设置得不够大, ...
Demonstrate all the questions on LeetCode in the form of animation.(用动画的形式呈现解LeetCode题目的思路) - fanfind/LeetCodeAnimation