X-Plosives A secret service developed a new kind ofexplosive that attain its volatile property only when a specific association ofproducts occurs. Each product is a mix of two different simple compounds, towhich we call abinding pair. If N>2, thenmix…
A secret service developed a new kind of explosive that attain its volatile property only when a specific association of products occurs. Each product is a mix of two different simple compounds, to which we call a binding pair. If N > 2, then mixing N…
UVA - 11987 Almost Union-Find I hope you know the beautiful Union-Find structure. In this problem, you’re to implement something similar, but not identical. The data structure you need to write is also a collection of disjoint sets, supporting 3 oper…
传送门 Description I hope you know the beautiful Union-Find structure. In this problem, you’re to implement something similar, but not identical. The data structure you need to write is also a collection of disjoint sets, supporting 3 operations: 1 p q…
Almost Union-Find I hope you know the beautiful Union-Find structure. In this problem, you're to implement something similar, but not identical. The data structure you need to write is also a collection of disjoint sets, supporting 3 operations: 1 p…
Almost Union-Find I hope you know the beautiful Union-Find structure. In this problem, you’re to implement somethingsimilar, but not identical.The data structure you need to write is also a collection of disjoint sets…
题目传送门 题意:训练指南P246 分析:主要是第二种操作难办,并查集如何支持删除操作?很巧妙的方法:将并查集树上p的影响消除,即在祖先上(sz--, sum -= p),然后为p换上马甲:id[p] = ++pos(可多次),这样id[p]就相当于是新的一个点,那么在Find(x)寻找祖先时要用x的马甲来寻找,即Find (id[x]). #include <bits/stdc++.h> using namespace std; const int N = 2e5 + 5; int rt[N…
题意:给你n个数,接着三种操作: I p v :告诉你 Xp = v I p q v :告诉你 Xp ^ Xq = v Q k p1 p2 … pk:问你k个数连续异或的结果 注意前两类操作可能会出现与之前告诉你的相矛盾,此时输出“The first n(第几个I) facts are conflicting.”接着一直保持沉默,否则不输出.最后一类询问可能得不到值,就输出“I don’t know.”,否则输出结果 题解:告诉你时使用并查集的合并操作,可以记录权值为此点异或父亲节点的值,祖先节…
Description You are not given n non-negative integersX0,X1,..., Xn-1 less than220, but they do exist, and their values never change. I'll gradually provide you some facts about them, and ask you some questions. There are two kinds of facts, plus one…
Severe acute respiratory syndrome (SARS), an atypical pneumonia of unknown aetiology, was recognized as a global threat in mid-March 2003. To minimize transmission to others, the best strategy is to separate the suspects from others. In the Not-Sprea…
