Submission #19676

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
19676	2016-02-25T04:26:56 Z	hongjun7	트리 (kriii4_X)	C++	9 / 100	97 ms	1084 KB

X

#include <stdio.h>
#include <algorithm>
using namespace std;
int n, m, par[10], a[10], b[10], c[10], res;
void f(int x) {
	c[x] = 1;
	for (int i = 1; i <= n; i++) {
		if (par[i] == x) {
			f(i);
		}
	}
}
void go(int x) {
	if (x == n + 1) {
		for (int i = 1; i <= n; i++) c[i] = 0;
		f(1);
		bool ok = 1;
		for (int i = 1; i <= n; i++) if (c[i] == 0) ok = 0;
		for (int i = 1; i <= m; i++) if (!(par[a[i]] == b[i] || par[b[i]] == a[i])) ok = 0;
		if (ok) res++;
		return;
	}
	if (x == 1) {
		par[x] = 0;
		go(x + 1);
	}
	else {
		for (int i = 1; i <= n; i++) {
			if (i == x) continue;
			par[x] = i;
			go(x + 1);
		}
	}
}
int main() {
	scanf("%d%d", &n, &m);
	for (int i = 1; i <= m; i++) scanf("%d%d", &a[i], &b[i]);
	res = 0;
	go(1);
	printf("%d", res);
}

Subtask #1

9.0 / 9.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	1084 KB	Output is correct
2	Correct	0 ms	1084 KB	Output is correct
3	Correct	0 ms	1084 KB	Output is correct
4	Correct	0 ms	1084 KB	Output is correct
5	Correct	0 ms	1084 KB	Output is correct
6	Correct	0 ms	1084 KB	Output is correct
7	Correct	5 ms	1084 KB	Output is correct
8	Correct	87 ms	1084 KB	Output is correct
9	Correct	96 ms	1084 KB	Output is correct
10	Correct	97 ms	1084 KB	Output is correct
11	Correct	91 ms	1084 KB	Output is correct
12	Correct	93 ms	1084 KB	Output is correct
13	Correct	5 ms	1084 KB	Output is correct
14	Correct	0 ms	1084 KB	Output is correct
15	Correct	89 ms	1084 KB	Output is correct
16	Correct	5 ms	1084 KB	Output is correct
17	Correct	0 ms	1084 KB	Output is correct
18	Correct	91 ms	1084 KB	Output is correct
19	Correct	5 ms	1084 KB	Output is correct
20	Correct	0 ms	1084 KB	Output is correct
21	Correct	5 ms	1084 KB	Output is correct
22	Correct	94 ms	1084 KB	Output is correct
23	Correct	5 ms	1084 KB	Output is correct
24	Correct	90 ms	1084 KB	Output is correct
25	Correct	95 ms	1084 KB	Output is correct
26	Correct	91 ms	1084 KB	Output is correct
27	Correct	5 ms	1084 KB	Output is correct
28	Correct	0 ms	1084 KB	Output is correct
29	Correct	0 ms	1084 KB	Output is correct
30	Correct	5 ms	1084 KB	Output is correct

Subtask #2

0.0 / 91.0

#	Verdict	Execution time	Memory	Grader output
1	Runtime error	0 ms	1080 KB	futex (syscall #202) was called by the program (disallowed syscall)
2	Halted	0 ms	0 KB	-