제출 #639846

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
639846	2022-09-12 09:11:20	classic	경주 (Race) (IOI11_race)	C++14	100 / 100	790 ms	37096 KiB

race

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#include <bits/stdc++.h>
using namespace std;
 
const int N = 2e5;
 
vector<pair<int, int>> adj[N];
int sz[N];
bool vis[N];
int res;
map<int, int> mn;
vector<pair<int, int>> cand;
 
int dfsSz(int u, int p) {
    sz[u] = 1;
    for (pair<int, int> v : adj[u]) {
        if (v.first != p && !vis[v.first]) {
            sz[u] += dfsSz(v.first, u);
        }
    }
    return sz[u];
}
 
int centroid(int u, int p, int siz) {
    for (pair<int, int> v : adj[u]) {
        if (v.first != p && !vis[v.first] && sz[v.first] > siz / 2) {
            return centroid(v.first, u, siz);
        }
    }
    return u;
}
 
 
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