Submission #829329

#	Time	Username	Problem	Language	Result	Execution time	Memory
829329		Darren0724	Political Development (BOI17_politicaldevelopment)	C++17	0 / 100	1 ms	1632 KiB

politicaldevelopment

#include<bits/stdc++.h>
using namespace std;
const int N=50005;
vector<int> adj[N];
vector<int> deg(N);
set<pair<int,int>> s;
int calc(int p){
    int sz=adj[p].size();
    if(sz==0)return 1;
    int g[sz]{};
    for(int i=0;i<sz;i++){
        for(int j=0;j<sz;j++){
            if(i==j||s.find({i,j})!=s.end()){
                g[i]|=1<<j;
            }
        }
    }
    int ans=0;
    for(int i=1;i<1<<sz;i++){
        int p=i;
        int cnt=0;
        for(int j=0;j<sz;j++){
            if(i&(1<<j)){
                p&=g[j];
                cnt++;
            }
        }
        if(p==i){
            ans=max(ans,cnt);
        }
    }
    return ans;
}

int32_t main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    int n,k;cin>>n>>k;
    for(int i=0;i<n;i++){
        cin>>deg[i];
        adj[i].resize(deg[i]);
        for(int j=0;j<deg[i];j++){
            cin>>adj[i][j];
            s.insert({i,adj[i][j]});
            s.insert({adj[i][j],i});
        }
    }
    int ans=0;
    for(int i=0;i<n;i++){
        ans=max(ans,calc(i));
    }
    cout<<ans<<endl;



    return 0;
}

• Subtask 1: 0 / 4
• Subtask 2: 0 / 12
• Subtask 3: 0 / 23
• Subtask 4: 0 / 38
• Subtask 5: 0 / 23