Submission #1198755

#	Time	Username	Problem	Language	Result	Execution time	Memory
1198755		THXuan	Geppetto (COCI15_geppetto)	C++20	72 / 80	1095 ms	460 KiB

geppetto

#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <queue>
#include <set>
#include <map>
#define INF 1e9
using namespace std;
typedef long long ll;
const ll MAXN = 100005;

void solve()
{
	int n, m; cin >> n >> m;
	map<pair<int, int>, int>v;
	for (int i = 0; i < m; i++) {
		int x, y; cin >> x >> y;
		v[{x, y}]++;
	}
	int ans = 0;
	for (int mask = 0; mask < (1 << n); mask++) {
		bool flag = true;
		for (int i = 0; i < n; i++) {
			for (int j = 0; j < n; j++) {
				if (mask & (1 << i) && mask & (1 << j) && v[{i + 1, j + 1}]) {
					flag = false;
					break;
				}
			}
			if (!flag)break;
		}
		if (flag)++ans;
	}
	cout << ans << "\n";
}

int main()
{
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	int t = 1;// cin>>t;
	while (t--) solve();
	return 0;
}

• Subtask 1: 72 / 80