[la P5031&hdu P3726] Graph and Queries Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Problem Description You are given an undirected graph with N vertexes and M edges. Every vertex in this graph has an integer v…

题目来源:HDU 3726 Graph and Queries 题意:见白书 思路:刚学treap 參考白皮书 #include <cstdio> #include <cstring> #include <cstdlib> using namespace std; struct Node { Node *ch[2]; int r; int v; int s; Node(int v): v(v) { ch[0] = ch[1] = NULL; r = rand(); s…

Graph and Queries Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) [Problem Description] You are given an undirected graph with N vertexes and M edges. Every vertex in this graph has an integer value assigned to it…

Graph and Queries Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 1467    Accepted Submission(s): 301 Problem Description You are given an undirected graph with N vertexes and M edges. Every ve…

Description You are given an undirected graph with N vertexes and M edges. Every vertex in this graph has an integer value assigned to it at the beginning. You're also given a sequence of operations and you need to process them as requested. Here's a…

题意:一个N个点(编号从1开始),M条边的无向图(编号从1开始),有3种操作: D X:把编号为X的边删了: Q X K:查询编号为X的结点所在连通分量第K大的元素: C X V:将编号为X的结点的权值修改为V. 问所有查询的结果的平均值(1 <= N <= 20000, 0 <= M <= 60000, -10^6 <= 点权 <= 10^6, 1 <= Q操作次数 <= 2 * 10^5, C操作次数 <= 2 * 10^5). 题目链接:http…

离线做法,逆序执行操作,那么原本的删除边的操作变为加入边的操作,用名次树维护每一个连通分量的名次,加边操作即是连通分量合并操作,每次将结点数小的子树向结点数大的子树合并,那么单次合并复杂度O(n1logn2),由于合并之后原本结点数少的子树结点数至少翻倍,所以每个结点最多被插入 logn 次,故总时间复杂度为 O(n log2n)  . 注意细节处理,代码如下: #include <cstdio> #include <cstdlib> #include <cstring>…

题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=5412 CRB and Queries Description There are $N$ boys in CodeLand. Boy i has his coding skill $A_{i}$. CRB wants to know who has the suitable coding skill. So you should treat the following two types of qu…

题目链接: http://acm.hdu.edu.cn/showproblem.php?pid=4034 Problem Description Everyone knows how to calculate the shortest path in a directed graph. In fact, the opposite problem is also easy. Given the length of shortest path between each pair of vertexe…

题目链接:http://acm.hdu.edu.cn/showproblem.php? pid=5412 Problem Description There are N boys in CodeLand. Boy i has his coding skill Ai. CRB wants to know who has the suitable coding skill. So you should treat the following two types of queries. Query 1…