제출 #919515

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
919515		TIN	Geppetto (COCI15_geppetto)	C++17	80 / 80	47 ms	348 KiB

geppetto

#include <bits/stdc++.h>

using namespace std;

#define FNAME "test"

const int N = 21;

int n, m;
int res = 0;
int bad[N];

void Task() {
	ios_base::sync_with_stdio(false);
	cin.tie(0); cout.tie(0);
	cout << fixed << setprecision(9);
	if (fopen(FNAME".inp","r")) {
		freopen(FNAME".inp","r",stdin);
		freopen(FNAME".out","w",stdout);
	}
}

void Solve() {
	//Your Code
	cin >> n >> m;
	memset(bad, 0, sizeof(bad));
	for (int i = 1; i <= m; i++) {
		int u, v;
		cin >> u >> v;
		--u, --v;
		bad[u] |= (1 << v);
		bad[v] |= (1 << u);
	}
	for (int mask = 0; mask < (1 << n); mask++) {
		res++;
		for (int i = 0; i < n; i++) {
			if (mask & (1 << i)) {
				if (mask & bad[i]) {
					res--;
					break;
				}
			}
		}
	}
	cout << res << '\n';
}

int main() {
	Task();
	Solve();
	cerr << "\nTime run: " << 1000*clock()/CLOCKS_PER_SEC << "ms";
	return 37^37;
}

컴파일 시 표준 에러 (stderr) 메시지

geppetto.cpp: In function 'void Task()':
geppetto.cpp:18:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |   freopen(FNAME".inp","r",stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
geppetto.cpp:19:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   19 |   freopen(FNAME".out","w",stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 80 / 80