Submission #453689

#	Time	Username	Problem	Language	Result	Execution time	Memory
453689		Blobo2_Blobo2	Bosses (BOI16_bosses)	C++14	100 / 100	765 ms	612 KiB

bosses

/*
Editor: Abdelrahman Hossam
Nickname: Blobo2_Blobo2
IOI next year isA :)
*/
/*#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math,O3")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,sse4.2,popcnt,abm,mmx,avx2,tune=native")
#pragma GCC optimize("-ffast-math")
#pragma GCC optimize("-funroll-loops")
#pragma GCC optimize("-funroll-all-loops,-fpeel-loops,-funswitch-loops")*/
#include<bits/stdc++.h>
using namespace std;
#define int long long
#define endl "\n"
#define all(v)  v.begin(),v.end()
#define gen(arr,n,nxt)  generate(arr,arr+n,nxt)
#define Blobo2_el_7akim_elly_3ayz_yro7_IOI_w_3ayz_yakol_jilaty ios_base::sync_with_stdio(false);cin.tie(0);

const int mo=1e9+7,INF=1e18;
int nxt(){int x;cin>>x;return x;}

signed main(){
    Blobo2_el_7akim_elly_3ayz_yro7_IOI_w_3ayz_yakol_jilaty
    int n=nxt();
    vector<int>adj[n+1];
    for(int i=0;i<n;i++){
        int x=nxt();
        for(int j=0;j<x;j++){
            int node = nxt()-1;
            adj[node].push_back(i);
        }
    }
    int mn=1e18;
    for(int i=0;i<n;i++){
        queue<pair<int,int> >q;
        bool vis[n];
        memset(vis,0,sizeof vis);
        q.push({1,i});
        vis[i]=1;
        int cnt=1,c=1;
        while(q.size()){
            pair<int,int> u=q.front();
            q.pop();
            for(auto v:adj[u.second]){
                if(!vis[v]){
                    q.push({u.first+1,v});
                    vis[v]=1;
                    cnt++;
                    c+=u.first+1;
                }
            }
            if(cnt==n)break;
        }
        if(cnt!=n)continue;
        mn=min(mn,c);
    }
    cout<<mn;
    return 0;
}

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