Submission #813332

#	Time	Username	Problem	Language	Result	Execution time	Memory
813332		akari	Bosses (BOI16_bosses)	C++14	67 / 100	27 ms	10376 KiB

bosses

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define fi first
#define se second
#define ii pair<ll,ll>
const ll maxn=2e5+2;

int n;
vector<int> adj[maxn];
vector<int> g[4000];
int dp[4000];
int ans=INT_MAX;
int sum,cnt;


void dfs(int u){
    //cout<<u<<endl;
    dp[u]=1;
    ++cnt;
    for (int v: g[u]){
        dfs(v);
        dp[u]+=dp[v];
    }
    sum+=dp[u];
}

void bfs(int s){
    bool ok[n+3]={};
    queue<int> q;
    q.push(s);
    ok[s]=1;
    for (int i=1;i<=n;++i) g[i].clear();
    while (!q.empty()){
        int u=q.front();
        q.pop();
        for (int v: adj[u]){
            if (!ok[v]){
                ok[v]=1;
                q.push(v);
                g[u].push_back(v);
            }
        }
    }
    sum=cnt=0;
    /*for (int i=1;i<=n;++i){
        for (int j: g[i]) cout<<j<<" "; cout<<endl;
    }*/
    dfs(s);
    //cout<<endl;
    //cout<<s<<" "<<sum<<endl;    
    if (cnt==n) ans=min(ans,sum);
}



int main(){
    cin>>n;
    for (int i=1;i<=n;++i){
        int k; cin>>k;
        while (k--){
            int x; cin>>x;
            adj[x].push_back(i);
            //cout<<x<<" "<<i<<endl;
        }
    }
    //bfs(1);
    //cout<<endl;
    for (int i=1;i<=n;++i) bfs(i);
    cout<<ans;
}

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