Submission #975162

#	Time	Username	Problem	Language	Result	Execution time	Memory
975162		Error404	Bosses (BOI16_bosses)	C++17	0 / 100	4 ms	15964 KiB

bosses

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define f first
#define s second
#define pb push_back
#define pi pair<int,int>
#define pl pair<ll,int>

const int MAX = 5e5+1;

int color[MAX];
int dis[MAX];
vector<int>g[MAX];

int n;

ll bfs(int u){
    dis[u] =1;
    memset(color,0,sizeof(color));
    queue<int>q;
    q.push(u);
    while(!q.empty()){
        int from = q.front();
        q.pop();
        if(color[from]) continue;
        color[from]=1;
        for(int to: g[from]){
            if(!color[to]){
                dis[to]= dis[from]+1;
                q.push(to);
            }
        }
    }
    
    ll sum = 0;
    for(int i = 1; i <=n; i++) {
        sum+= dis[i];
        if(!dis[i]) return INT_MAX;
    }
 //   cout << u << " "<< sum << endl;
    return sum;
}


int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    cin >> n;
    
    int temp, k;
    for(int i = 1; i <= n; i++){
        cin >> temp;
        while(temp--){
            cin >> k;
            g[k].pb(i);
        }
    }
 
    ll ans= INT_MAX;
    for(int i= 1; i <= n; i++){
        ans = min(bfs(i),ans);
    }
    cout << ans << endl;
}

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