Submission #1008540

#	Time	Username	Problem	Language	Result	Execution time	Memory
1008540		vjudge1	Bosses (BOI16_bosses)	C++17	100 / 100	841 ms	1108 KiB

bosses

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#include <bits/stdc++.h>
using namespace std;
#define endl "\n"
#define int long long
vector <int> v[5001],child[5001];
int vis[5001];
int n,k;
array <int,2> dfs(int i,int last){
    if(child[i].size()==0) return {1,1};
    int sum=0,sum2=0;
    for(int j:child[i]){
        if(j!=last){
            array <int,2> a=dfs(j,i);
            sum+=a[0];
            sum2+=a[1];
        }
    }
    return {sum+1,sum2+sum+1};
}
int bfs(int i){
    for(int i=1;i<=n;i++) child[i].clear();
    memset(vis,0,sizeof vis);
    int CNT=1;
    queue <int> qu;
    qu.push(i);
    vis[i]=1;
    while(!qu.empty()){
        
        int I=qu.front();
        qu.pop();
        
        for(int j:v[I]){
            if(vis[j]==0){
                vis[j]=1;
                child[I].push_back(j);
                CNT++;
                qu.push(j);
            }
        }
    }
    if(CNT==n) return dfs(i,0)[1];
    else return 1e18;
}
signed main()
{
    cin>>n;
    for(int i=1;i<=n;i++){
        cin>>k;
        for(int j=1;j<=k;j++){
            int a;
            cin>>a;
            v[a].push_back(i);
        }
    }
    int mn=1e18;
    for(int i=1;i<=n;i++) mn=min(bfs(i),mn);    
    cout<<mn;
    return 0;
}

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