제출 #1277910

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1277910		glupan	Village (BOI20_village)	C++20	50 / 100	38 ms	27996 KiB

Village

#include <bits/stdc++.h>

using namespace std;

#define ll long long

const int MAX_N = 100005;

vector<int>adj[MAX_N];
int visited[MAX_N],ans;

void dfs(int s, int p) {
    for(int u : adj[s]) {
        if(u == p) continue;
        dfs(u,s);
    }
    if(!visited[s] and !visited[p] and s and p) {
        visited[s] = p;
        visited[p] = s;
        ans+=2;
    }
}

void solve() {
    int n; cin >> n;
    for(int i=0; i<n-1; i++) {
        int a,b; cin >> a >> b;
        adj[a].push_back(b);
        adj[b].push_back(a);
    }
    dfs(1,0);
    for(int i=1; i<=n; i++) {
        if(!visited[i]) {
            visited[i] = i;
            swap(visited[i], visited[adj[i][0]]);
            ans+=2;
        }
    }
    cout << ans << " " << ans << endl;
    for(int i=1; i<=n; i++) cout << visited[i] << " ";
    cout << endl;
    for(int i=1; i<=n; i++) cout << i << " ";
    cout << endl;
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(NULL);

    int t=1;
    while(t--) solve();
}

• Subtask 1: 6 / 12
• Subtask 2: 19 / 38
• Subtask 3: 25 / 50