Nearest Common Ancestors Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 24587   Accepted: 12779 Description A rooted tree is a well-known data structure in computer science and engineering. An example is shown below:  In the figure, e…

POJ 1330 Nearest Common Ancestors Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 24209   Accepted: 12604 Description A rooted tree is a well-known data structure in computer science and engineering. An example is shown below:  In the fi…

A - Nearest Common Ancestors Time Limit:1000MS     Memory Limit:10000KB     64bit IO Format:%lld & %llu Submit Status Description A rooted tree is a well-known data structure in computer science and engineering. An example is shown below: In the figu…

题目链接:http://poj.org/problem?id=1330 题意就是求一组最近公共祖先,昨晚学了离线tarjan,今天来实现一下. 个人感觉tarjan算法是利用了dfs序和节点深度的关系,大致的意思:dfs如果不递归到递归基,那么dfs就会越递归越深,这个时候深度也是相应增加的,所以这个时候任意在已经遍历过的节点中选取两个点,计算他们的lca也就相当于是用并查集求他们的root.而dfs执行到递归基,转而执行下一个分支的时候,这个时候dfs的节点应当是小于等于之前执行到递归基的节点…

经典LCA操作.. 贴AC代码 import java.lang.reflect.Array; import java.util.*; public class POJ1330 { // 并查集部分 static int[] p; static int find(int u){ if(p[u]!=u){ p[u] = find(p[u]); } return p[u]; } static class Edge{ int to; int next; } // 链式前向星 static int[]…

[知识点:离线算法&在线算法] 一个离线算法,在开始时就需要知道问题的所有输入数据,而且在解决一个问题后就要立即输出结果. 一个在线算法是指它可以以序列化的方式一个个的处理输入,也就是说在开始时并不需要已经知道所有的输入. [倍增-在线算法] 水题……这道题范围卡得很紧…数组少了一位就会WA. #include<iostream> #include<cstdio> #include<cstring> #include<algorithm> #incl…

POJ.1330 Nearest Common Ancestors (LCA 倍增) 题意分析 给出一棵树,树上有n个点(n-1)条边,n-1个父子的边的关系a-b.接下来给出xy,求出xy的lca节点编号. LCA裸题,用倍增思想. 代码总览 #include <cstdio> #include <algorithm> #include <cstring> #include <cmath> #define nmax 80520 #define demen…

POJ 1330 Nearest Common Ancestors 题意:最近公共祖先的裸题 思路:LCA和ST我们已经很熟悉了,但是这里的f[i][j]却有相似却又不同的含义.f[i][j]表示i节点的第2j个父亲是多少   这个代码不是我的,转自 邝斌博客 /* *********************************************** Author :kuangbin Created Time :2013-9-5 9:45:17 File Name :F:\2013AC…

POJ 1330 Nearest Common Ancestors / UVALive 2525 Nearest Common Ancestors (最近公共祖先LCA) Description A rooted tree is a well-known data structure in computer science and engineering. An example is shown below: In the figure, each node is labeled with an…

Nearest Common Ancestors Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 14902   Accepted: 7963 Description A rooted tree is a well-known data structure in computer science and engineering. An example is shown below:  In the figure, each…

传送门 Nearest Common Ancestors Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 26612   Accepted: 13734 Description A rooted tree is a well-known data structure in computer science and engineering. An example is shown below:    In the figur…

Nearest Common Ancestors Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 18136   Accepted: 9608 Description A rooted tree is a well-known data structure in computer science and engineering. An example is shown below: In the figure, each…

Nearest Common Ancestors Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 19728   Accepted: 10460 Description A rooted tree is a well-known data structure in computer science and engineering. An example is shown below:    In the figure, e…

POJ - 1330 Nearest Common Ancestors Time Limit: 1000MS   Memory Limit: 10000KB   64bit IO Format: %lld & %llu Submit Status Description A rooted tree is a well-known data structure in computer science and engineering. An example is shown below:  In t…

pku 1330 Nearest Common Ancestors 题目链接: http://poj.org/problem?id=1330 题目大意: 给定一棵树的边关系,注意是有向边,因为这个WA一发.然后N个顶点给出了N-1有向边,求一对点之间的最近公共祖先 思路: 裸的离线tarjan Lca即可,但注意是有向边,需要先找出根节点,数组标记.其次要注意前向星存的时候只存一条边即可 代码: #include <iostream> #include <string.h> usi…

Nearest Common Ancestors Description A rooted tree is a well-known data structure in computer science and engineering. An example is shown below:  In the figure, each node is labeled with an integer from {1, 2,...,16}. Node 8 is the root of the tree.…

Nearest Common Ancestors Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 30147   Accepted: 15413 Description A rooted tree is a well-known data structure in computer science and engineering. An example is shown below:  In the figure, eac…

Nearest Common Ancestors Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 19919   Accepted: 10544 Description A rooted tree is a well-known data structure in computer science and engineering. An example is shown below: In the figure, each…

POJ 1330 Nearest Common Ancestors A rooted tree is a well-known data structure in computer science and engineering. An example is shown below:  In the figure, each node is labeled with an integer from {1, 2,...,16}. Node 8 is the root of the tree. No…

Nearest Common Ancestors Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 34657   Accepted: 17585 Description A rooted tree is a well-known data structure in computer science and engineering. An example is shown below:  In the figure, eac…

Nearest Common Ancestors Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 20715   Accepted: 10910 Description A rooted tree is a well-known data structure in computer science and engineering. An example is shown below: In the figure, each…

题目链接:http://poj.org/problem?id=1330 Nearest Common Ancestors Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 36918   Accepted: 18495 Description A rooted tree is a well-known data structure in computer science and engineering. An example…

任意门:http://poj.org/problem?id=1330 Nearest Common Ancestors Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 34942   Accepted: 17695 Description A rooted tree is a well-known data structure in computer science and engineering. An example…

Nearest Common Ancestors Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 39596   Accepted: 19628 Description A rooted tree is a well-known data structure in computer science and engineering. An example is shown below: In the figure, each…

JDOJ 3055: Nearest Common Ancestors JDOJ传送门 Description 给定N个节点的一棵树,有K次查询,每次查询a和b的最近公共祖先. 样例中的16和7的公共祖先(LCA:Least Common Ancestors)是4. Input 第一行两个整数N(1 < N <= 105).K(1 <= K <= 105) 第2~N行,每行两个整数a.b(1 <= a,b <= N),表示a是b的父亲. 第N+1~N+K+1行,每行两个…

Nearest Common Ancestors Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 27316   Accepted: 14052 Description A rooted tree is a well-known data structure in computer science and engineering. An example is shown below:  In the figure, eac…

A. Nearest Common Ancestors Time Limit: 1000ms Case Time Limit: 1000ms Memory Limit: 10000KB   64-bit integer IO format: %lld      Java class name: Main     A rooted tree is a well-known data structure in computer science and engineering. An example…

Nearest Common Ancestors Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 14698   Accepted: 7839 Description A rooted tree is a well-known data structure in computer science and engineering. An example is shown below:  In the figure, each…

Nearest Common Ancestors Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 24618   Accepted: 12792 Description A rooted tree is a well-known data structure in computer science and engineering. An example is shown below: In the figure, each…

Nearest Common Ancestors Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 30082   Accepted: 15386 Description A rooted tree is a well-known data structure in computer science and engineering. An example is shown below:  In the figure, eac…