Submission #1198028

#	Time	Username	Problem	Language	Result	Execution time	Memory
1198028		Dan4Life	Political Development (BOI17_politicaldevelopment)	C++20	4 / 100	3095 ms	23112 KiB

politicaldevelopment

#include <bits/stdc++.h>
using namespace std;

#define pb push_back
#define sz(a) (int)a.size()
#define all(a) begin(a),end(a)

using ll = long long;
using vi = vector<int>;
using ar2 = array<int,2>;
using ar3 = array<int,3>;

const int mxN = (int)5e4+10;
const int INF = (int)1e9+1;
const ll LINF = (ll)2e18+1;
const int MOD = (int)1e9+7;

int N, K;
vi adj[mxN];
bitset<mxN> edge[mxN];

int main(){
	ios_base::sync_with_stdio(false); cin.tie(0);
	cin >> N >> K;
	for(int i = 0; i < N; i++){
		int x,y; cin >> x;
		while(x--){
			cin>>y; if(y<x) continue;
			adj[i].pb(y),edge[i][y]=edge[y][i]=1;
		}
	}
	int ans = 1;
	for(int i = 0; i < N; i++){
		for(int mask = 0; mask < (1<<sz(adj[i])); mask++){
			vi xd; int num = __builtin_popcount(mask);
			if(ans>=num+1 or num+1>K) continue;
			vi v; v.clear();
			bool ok = 1; v.pb(i);
			for(int j = 0; j < sz(adj[i]); j++){
				if(mask>>j&1){
					for(auto u : v)ok&=edge[u][adj[i][j]];
					if(!ok) break;
					v.pb(adj[i][j]); 
				}
			}
			if(ok) ans=num+1;
		}
	}
	cout << ans << "\n";
}

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