Submission #880759

#	Time	Username	Problem	Language	Result	Execution time	Memory
880759		irmuun	Bosses (BOI16_bosses)	C++17	0 / 100	0 ms	348 KiB

bosses

#include<bits/stdc++.h>

using namespace std;
 
#define ll long long
#define pb push_back
#define ff first
#define ss second
#define all(s) s.begin(),s.end()
#define rall(s) s.rbegin(),s.rend()

int main(){
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    int n;
    cin>>n;
    vector<int>adj[n+1];
    for(int i=1;i<=n;i++){
        int k;
        cin>>k;
        for(int j=1;j<=k;j++){
            int x;
            cin>>x;
            adj[x].pb(i);
        }
    }
    ll ans=1e9;
    vector<bool>used(n+1,0);
    int tot[n+1];
    vector<int>g[n+1];
    for(int i=1;i<=n;i++){
        for(int j=1;j<=n;j++){
            g[j].clear();
        }
        fill(all(used),0);
        queue<int>q;
        q.push(i);
        used[i]=true;
        while(!q.empty()){
            int x=q.front();
            q.pop();
            for(auto y:adj[x]){
                if(!used[y]){
                    used[y]=true;
                    g[x].pb(y);
                    q.push(y);
                }
            }
        }
        function <void(int,int)> dfs=[&](int x,int p){
            tot[x]=1;
            for(auto y:g[x]){
                if(y!=p){
                    dfs(y,x);
                    tot[x]+=tot[y];
                }
            }
        };
        dfs(i,0);
        ll cur=0;
        for(int i=1;i<=n;i++){
            cur+=tot[i];
        }
        ans=min(ans,cur);
    }
    cout<<ans;
}

• Subtask 1: 0 / 22
• Subtask 2: 0 / 45
• Subtask 3: 0 / 33