DZY Loves Chemistry Time Limit:1000MS     Memory Limit:262144KB     64bit IO Format:%I64d & %I64u Submit Status Practice CodeForces 445B Description DZY loves chemistry, and he enjoys mixing chemicals. DZY has n chemicals, and m pairs of them will re…

转载请注明出处:http://blog.csdn.net/u012860063?viewmode=contents 题目链接:http://codeforces.com/problemset/problem/445/B --------------------------------------------------------------------------------------------------------------------------------------------…

题目链接:http://codeforces.com/problemset/problem/445/B 题目意思:给出 n 种chemicals,当中有 m 对可以发生反应.我们用danger来评估这些chemicals的厉害程度.厉害程度是这样的:一瓶什么都不加的瓶子的danger 为 1,如果有一对(即 m = 1)chemicals 能够发生反应,那么这个danger就会加倍(1*2).不过要注意一点,对于 1 2: 1 3: 2 3,danger为 4 而不为 8.(因为这个条件限制了:…

题意: 有N种药剂编号 1 ~ N,然后有M种反应关系,这里有一个试管,开始时危险系数为 1,每当放入的药剂和瓶子里面的药剂发生反应时危险系数会乘以2,否则就不变,给出N个药剂和M种反应关系,求最大的危险系数. 思路: 我们假设 1 ~ N   有 M 种反应关系 ,若果有反应关系的我们可以把他们看成是一个集合  ,假设这M种反应构成了 T个集合,那么把这T个集合中的元素依次放入试管,有几个不发生反应呢?当然是T个了,把每个集合看成是一课树,根节点和其子节点反应,这个子节点又和它的子节点发生反应…

题目链接: 传送门 DZY Loves Chemistry time limit per test:1 second     memory limit per test:256 megabytes Description DZY loves chemistry, and he enjoys mixing chemicals. DZY has n chemicals, and m pairs of them will react. He wants to pour these chemicals…

传送门:http://codeforces.com/problemset/problem/445/B 参考:https://blog.csdn.net/littlewhite520/article/details/77018559 题意: 有N种药剂编号 1 ~ N,然后有M种反应关系,这里有一个试管,开始时危险系数为 1,每当放入的药剂和瓶子里面的药剂发生反应时危险系数会乘以2,(注意,不管会发生反映的有几组,只要在同一次加入的,只乘一个2:)否则就不变,给出N个药剂和M种反应关系,求最大的危…

B. DZY Loves Chemistry time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output DZY loves chemistry, and he enjoys mixing chemicals. DZY has n chemicals, and m pairs of them will react. He wants to…

B. DZY Loves Chemistry time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output DZY loves chemistry, and he enjoys mixing chemicals. DZY has n chemicals, and m pairs of them will react. He wants to…

DZY Loves Chemistry time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output DZY loves chemistry, and he enjoys mixing chemicals. DZY has n chemicals, and m pairs of them will react. He wants to pou…

题目大意:Codeforces 444C DZY Loves Colors 题目大意:两种操作,1是改动区间上l到r上面德值为x,2是询问l到r区间总的改动值. 解题思路:线段树模板题. #include <cstdio> #include <cstring> #include <cstdlib> #include <algorithm> using namespace std; const int maxn = 5*1e5; typedef long lo…