How Many Answers Are Wrong 题意:输入一连串的区间和,问和前面的矛盾个数: 思路:我在做专题,知道是并查集,可是还是不知道怎么做,学了一下权值并查集和大佬的优秀思路,感觉回了一点: 具体就是 在并查集的基础上,加上val[]数组用来记录区间和,而原来的fa[]数组表示的是这个数能到达的最左边的下标: 下面是ac代码 #include <cstdio> #include <algorithm> using namespace std; ; ;//fa记录下标…
Travel Time Limit: 1500/1000 MS (Java/Others) Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 2404 Accepted Submission(s): 842 Problem Description Jack likes to travel around the world, but he doesn’t like to wait. Now, he is tr…
True Liars Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 16338 Accepted Submission(s): 5724 题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=3038 Description: After having drifted about in a…
Recently, Pari and Arya did some research about NP-Hard problems and they found the minimum vertex cover problem very interesting. Suppose the graph G is given. Subset A of its vertices is called a vertex cover of this graph, if for each edge uv ther…