제출 #252705

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
252705		VEGAnn	Geppetto (COCI15_geppetto)	C++14	80 / 80	231 ms	504 KiB

geppetto

#include <bits/stdc++.h>
#define sz(x) ((int)x.size())
#define all(x) x.begin(),x.end()
#define PB push_back
using namespace std;
typedef long long ll;
const int N = 22;
bool bad[N][N];
int n, m, ans;

int main(){
    ios_base::sync_with_stdio(0); cin.tie(0);

#ifdef _LOCAL
    freopen("in.txt","r",stdin);
#endif // _LOCAL

    cin >> n >> m;

    for (int i = 0; i < m; i++){
        int x, y; cin >> x >> y;
        x--; y--;

        bad[x][y] = bad[y][x] = 1;
    }

    for (int msk = 0; msk < (1 << n); msk++){
        bool ok = 1;

        for (int i = 0; i < n && ok; i++){
            if (!(msk & (1 << i))) continue;

            for (int j = i + 1; j < n && ok; j++){
                if (!(msk & (1 << j))) continue;

                if (bad[i][j])
                    ok = 0;
            }
        }

        ans += ok;
    }

    cout << ans;

    return 0;
}

• Subtask 1: 80 / 80