题目大意:有一些简单的化合物,每个化合物由两种元素组成,把这些化合物按顺序装车,若k个化合物正好包含k种元素,那么就会爆炸.避免爆炸,有些化合物就不能装车.求有多少个不能装车. 题目分析:若k个化合物正好包含k种元素,那么就会爆炸.我们把每种元素看成一个顶点,每种化合物看成一条边,若有环存在的时候正好是爆炸的情况,所以避免成环记录不能放的数量就行了. #include<iostream> #include<cstdio> using namespace std; ; int f[m…
A secret service developed a new kind of explosive that attain its volatile property only when a specicassociation of products occurs. Each product is a mix of two different simple compounds, to which wecall a binding pair. If N > 2, then mixing N diff…
题意:有编号为1到n的学生,然后有m组调查,每组调查中有a和b,表示该两个学生有同样的宗教信仰,问最多有多少种不同的宗教信仰 简单并查集 //#define LOCAL #include <iostream> #include <cstdio> #include <cstring> using namespace std; + ; int parent[maxn], n, m; int GetParent(int x) { return parent[x] == x ?…
The Suspects Time Limit: 1000MS Memory Limit: 20000K Total Submissions: 32781 Accepted: 15902 Description Severe acute respiratory syndrome (SARS), an atypical pneumonia of unknown aetiology, was recognized as a global threat in mid-March 2003. T…
Farm Irrigation Time Limit : 2000/1000ms (Java/Other) Memory Limit : 65536/32768K (Java/Other) Total Submission(s) : 6 Accepted Submission(s) : 3 Font: Times New Roman | Verdana | Georgia Font Size: ← → Problem Description Benny has a spacious fa…
“打老虎”的背后 Time Limit: 2000/1000ms (Java/Others) Problem Description: “习大大”自担任国家主席以来大力反腐倡廉,各地打击贪腐力度也逐步加强.中国的这种令外国人不解的“风情”到底是何缘由呢?其实中国人都知道,所有的腐败问题基本上都源自官场上的“潜规则”,那“潜规则”又是源自什么呢?在中国盛行一句古语,“无关系不成方圆”,说的是中国是一个人情社会,纽带关系很强.一个人跟另一个人可能存在沾亲带故的某种“关系”,而所有通过这种“关系”的传…
B - 叠叠乐 Crawling in process... Crawling failed Time Limit:2000MS Memory Limit:30000KB 64bit IO Format:%lld & %llu Submit Status Description Input Output Sample Input Sample Output Hint Description Farmer John and Betsy are playing…