Submission #1128988

#	Time	Username	Problem	Language	Result	Execution time	Memory
1128988		Muhammet	Political Development (BOI17_politicaldevelopment)	C++20	39 / 100	3108 ms	314344 KiB

politicaldevelopment

#include "bits/stdc++.h"

using namespace std;

#define SZ(s) (int)s.size()

int n, k, ans;

vector <bool> vis;

vector <vector <bool>> a;

vector <int> v1;

vector <vector <int>> v;

void dfs(int x){
	ans = max(ans, SZ(v1));
	for(auto i : v[x]){
		if(vis[i]) continue;
		bool tr = 0;
		for(auto j : v1){
			if(!a[i][j] or !a[j][i]){
				tr = 1;
				break;
			}
		}
		if(!tr){
			v1.push_back(i);
			vis[i] = true;
			dfs(i);
			vis[i] = false;
			v1.pop_back();
		}
	}
}

int main(){
	ios::sync_with_stdio(false); cin.tie(nullptr);

	cin >> n >> k;
	v.resize(n+1), vis.assign(n+1,0);
	a.assign(n+1, vector<bool> (n+1,0));
	bool tr = 0;
	for(int i = 0; i < n; i++){
		int d;
		cin >> d;
		if(d != 0) tr = 1;
		while(d--){
			int x;
			cin >> x;
			a[i][x] = true;
			v[i].push_back(x);
		}
	}
	for(int i = 0; i < n; i++){
		v1.push_back(i);
		vis[i] = true;
		dfs(i);
		vis[i] = false;
		v1.pop_back();
	}
	cout << ans;
}

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