Submission #1306209

#	Time	Username	Problem	Language	Result	Execution time	Memory
1306209		Robert_junior	Political Development (BOI17_politicaldevelopment)	C++20	27 / 100	3095 ms	322876 KiB

politicaldevelopment

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define ll long long
#define all(x) x.begin(), x.end()
#define ins insert
#define pb push_back
#define F first
#define S second
#define bt bitset<50010>
const int N = 50010, K = 1610;
const int mod = 998244353;
vector<int>g[N], gg[N];
bt b[N];
int ans = 1;
void solve(){
	int n, k;
	cin>>n>>k;
	for(int i = 1; i <= n; i++){
		int m;
		cin>>m;
		for(int j = 1; j <= m; j++){
			int x;
			cin>>x;
			x++;
			gg[i].pb(x);
		}
	}
	for(int i = 1; i <= n; i++){
	    for(auto to : gg[i]){
	        for(auto it : gg[to]){
	            if(it == i){
    	            g[i].pb(to);
    	            b[i][to] = 1;
	            }
	        }
	    }
	}
	for(int i = 1; i <= n; i++){
	    int m = g[i].size();
	    for(int msk = 0; msk < (1<<m); msk++){
	        vector<int>v;
	        for(int j = 0; j < m; j++){
	            if((msk>>j) & 1){
	                v.pb(g[i][j]);
	            }
	        }
	        bool ok = 1;
	        for(auto it : v){
	            for(auto it1 : v){
	                if(it == it1) continue;
	                ok &= b[it][it1];
	            }
	        }
	        if(ok) ans = max(ans, (int)(__builtin_popcount(msk)) + 1);
	    }
	}
	cout<<ans;
}
main(){
	ios_base :: sync_with_stdio(false); 
	cin.tie(nullptr);
	int t = 1;
	//cin>>t;
	while(t--){
		solve();
	}
}

Compilation message (stderr)

politicaldevelopment.cpp:60:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   60 | main(){
      | ^~~~

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