题意:给一个无向图.每次查询破坏一条边,每次输出查询后连通图的个数. 思路:并查集.逆向思维,删边变成加边. #include<cstdio> #include<cstring> #include<algorithm> #include<vector> #include<iostream> #define inf -100000000 #define LL long long #define maxn 100005 using namespace…

这道题是并差集的简单应用 #include <cstdio> #include <cstring> #include <algorithm> #define maxn 100010 using namespace std; int x[maxn],y[maxn],flag[maxn],f[maxn],t[maxn]; bool vis[maxn]; inline int find(int x) { if(x==f[x]) return x; return f[x]=fi…

1671 并查集 对于询问删除边之后的连通块 可以倒着加边 最后再倒序输出 #include <iostream> #include<cstdio> #include<cstring> #include<algorithm> #include<stdlib.h> using namespace std; #define N 100010 int p[N],father[N],a,b,f[N]; int pp[N]; struct node { i…

Anansi's Cobweb Time limit: 1.0 secondMemory limit: 64 MB Usatiy-Polosatiy XIII decided to destroy Anansi's home — his cobweb. The cobweb consists of Nnodes, some of which are connected by threads. Let us say that two nodes belong to the same piece i…

题目链接 题意:求给定的字符串的最长回文子串 分析:做法是构造一个新的字符串是原字符串+反转后的原字符串(这样方便求两边回文的后缀的最长前缀),即newS = S + '$' + revS,枚举回文串中心位置,RMQ询问LCP = min (height[rank[l]+1] to height[rank[r]]),注意的是RMQ传入参数最好是后缀的位置,因为它们在树上的顺序未知,且左边还要+1. #include <cstdio> #include <algorithm> #in…

2071. Juice Cocktails Time limit: 1.0 secondMemory limit: 64 MB Once n Denchiks come to the bar and each orders a juice cocktail. It could be from 1 to 3 different juices in each cocktail. There are three juices in the bar: apple, banana and pineappl…

2073. Log Files Time limit: 1.0 secondMemory limit: 64 MB Nikolay has decided to become the best programmer in the world! Now he regularly takes part in various programming contests, attentively listens to problems analysis and upsolves problems. But…

2070. Interesting Numbers Time limit: 2.0 secondMemory limit: 64 MB Nikolay and Asya investigate integers together in their spare time. Nikolay thinks an integer is interesting if it is a prime number. However, Asya thinks an integer is interesting i…

2069. Hard Rock Time limit: 1.0 secondMemory limit: 64 MB Ilya is a frontman of the most famous rock band on Earth. Band decided to make the most awesome music video ever for their new single. In that music video Ilya will go through Manhattan standi…

2068. Game of Nuts Time limit: 1.0 secondMemory limit: 64 MB The war for Westeros is still in process, manpower and supplies are coming to an end and the winter is as near as never before. The game of thrones is unpredictable so Daenerys and Stannis…