最近公共祖先(LCA)https://www.luogu.org/problemnew/show/P3379 #define RG register #include<cstdio> #include<iostream> using namespace std; const int N=500010; int n,m,s,cnt;//n点数,m边数,s根节点 int dep[N],f[N][25],last[N];//dep深度,f[i][j]表示第i个节点的2^j祖先的序号 in…
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…
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…
POJ 1470 Closest Common Ancestors(最近公共祖先 LCA) Description Write a program that takes as input a rooted tree and a list of pairs of vertices. For each pair (u,v) the program determines the closest common ancestor of u and v in the tree. The closest co…
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…
Given a binary search tree (BST), find the lowest common ancestor (LCA) of two given nodes in the BST. According to the definition of LCA on Wikipedia: “The lowest common ancestor is defined between two nodes p and q as the lowest node in T that has…
Given a binary tree, find the lowest common ancestor (LCA) of two given nodes in the tree. According to the definition of LCA on Wikipedia: “The lowest common ancestor is defined between two nodes p and q as the lowest node in T that has both p and q…
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…
How far away ? Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 9097 Accepted Submission(s): 3171 Problem Description There are n houses in the village and some bidirectional roads connecting…
Given a binary search tree (BST), find the lowest common ancestor (LCA) of two given nodes in the BST. According to the definition of LCA on Wikipedia: “The lowest common ancestor is defined between two nodes p and q as the lowest node in T that has…
