제출 #1271354

#제출 시각아이디문제언어결과실행 시간메모리
1271354rayan_bdBosses (BOI16_bosses)C++20
0 / 100
0 ms328 KiB
#include <bits/stdc++.h>
using namespace std;
const int mxN = 5005;
int ans = 0, v[mxN], vis[mxN];
vector<int> adj[mxN], nadj[mxN];
void dfs(int u){
  //  cout << u << endl;
    vis[u] = 1;
    int t = 0;
    for(auto it : nadj[u]){
        if(!vis[it]){
            dfs(it);
            t += v[it];
        }
    }
    v[u] = t + 1;
}
signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(nullptr); cout.tie(nullptr);
    int n, u;
    cin >> n;
    pair<int, int> mx = {0, 0};
    for(int i = 1, k; i <= n; ++i){
        cin >> k;
        while(k --){
            cin >> u;
            adj[u].push_back(i);
            mx = max(mx, {adj[u].size(), u});
        }
    }
    queue<int> q;
    q.push(mx.second);
    while(q.size()){
        int sz = q.size();
        while(sz--){
            int tp = q.front();
            q.pop();
            vis[tp] = 1;
            for(auto it : adj[tp]){
                if(!vis[it]){
                    vis[it] = 1;
                    q.push(it);
                    nadj[tp].push_back(it);
                }
            }
        }
    }
    for(int i = 1; i <= n; ++i) vis[i] = 0;
    dfs(mx.second);
    for(int i = 1; i <= n; ++i) ans += v[i];
    cout << ans << "\n";
    return 0;
}
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