Is It A Tree? Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 16702 Accepted Submission(s): 3761 Problem Description A tree is a well-known data structure that is either empty (null, void, n…
Is It A Tree? Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 20416 Accepted Submission(s): 4628 Problem Description A tree is a well-known data structure that is either empty (null, void, n…
Is It A Tree? Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 20222 Accepted Submission(s): 456 Problem Description A tree is a well-known data structure that is either empty (null, void, not…
Is It A Tree?Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 29483 Accepted Submission(s): 6775 Problem DescriptionA tree is a well-known data structure that is either empty (null, void, noth…
Is It A Tree? Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 33083 Accepted Submission(s): 7574 题目链接 http://acm.hdu.edu.cn/showproblem.php?pid=1325 Problem Description A tree is a well-known data…
Description A tree is a well-known data structure that is either empty (null, void, nothing) or is a set of one or more nodes connected by directed edges between nodes satisfying the following properties. There is exactly one node, called the root, t…
题目链接:http://acm.split.hdu.edu.cn/showproblem.php?pid=5423 Problem Description As we know, Rikka is poor at math. Yuta is worrying about this situation, so he gives Rikka some math tasks to practice. There is one of them: For a tree T, let F(T,i) be t…
Is It A Tree? Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 23312 Accepted Submission(s): 5338 Problem Description A tree is a well-known data structure that is either empty (null, void, no…
Query on A Tree Time Limit: 20000/10000 MS (Java/Others) Memory Limit: 132768/132768 K (Java/Others) Total Submission(s): 712 Accepted Submission(s): 266 Problem Description Monkey A lives on a tree, he always plays on this tree. One day, monke…
题目:这里 题意: 感觉并不能表达清楚题意,所以 Problem Description In mathematics, and more specifically in graph theory, a tree is an undirected graph in which any two nodes are connected by exactly one path. In other words, any connected graph without simple cycles is a…
Problem Description XXX is very interested in algorithm. After learning the Prim algorithm and Kruskal algorithm of minimum spanning tree, XXX finds that there might be multiple solutions. Given an undirected weighted graph with n (1<=n<=100) vertex…
并查集.需要考虑入度. #include <stdio.h> #include <string.h> #define MAXNUM 10005 int bin[MAXNUM]; int degree[MAXNUM]; int nums[MAXNUM]; int find(int x) { int r = x; while (bin[r] != r) r = bin[r]; return r; } int main() { ; int i, flg; ) { scanf("…
Query on A Tree Time Limit: 20000/10000 MS (Java/Others) Memory Limit: 132768/132768 K (Java/Others)Total Submission(s): 733 Accepted Submission(s): 275 Problem Description Monkey A lives on a tree, he always plays on this tree. One day, monkey…
Is It A Tree? Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 19907 Accepted Submission(s): 4472 Problem Description A tree is a well-known data structure that is either empty (null, void, no…
Bob intends to color the nodes of a tree with a pen. The tree consists of NN nodes. These nodes are numbered 1,2,...,N1,2,...,N. The root of the tree is node 11. The initial color of each node is white. Bob can use one unit energy to color one node i…
题目链接 Paths on the tree 来源 2014 多校联合训练第5场 Problem B 题意就是给出m条树上的路径,让你求出可以同时选择的互不相交的路径最大数目. 我们先求出每一条路径(u, v)中u和v的LCA:w,按照路径的w的深度大小deep[w]对所有的路径排序. deep[w]越大,排在越前面. 然后从第一条路径开始一次处理,看c[u]和c[v]是否都没被标记过,如果都没被标记过则我们把这条路径选上,把答案加1. 同时标记以w为根的子树的节点为1,方便后续对c数组的查询…
#include<stdio.h>//判断是否有环,判断是否有点,判断是否是一个父节点 #include<string.h> #define N 1000000 int pre[N+10],dis[N+10]; int find(int n ) { if(pre[n]!=n) return pre[n]=find(pre[n]); return pre[n]; } int main() { int n,m,i,a,b,j,cnt,flag,f1,f2,k=0,min,max; wh…
Revenge of Segment Tree Problem Description In computer science, a segment tree is a tree data structure for storing intervals, or segments. It allows querying which of the stored segments contain a given point. It is, in principle, a static structur…
