Submission #43839

#	Time	Username	Problem	Language	Result	Execution time	Memory
43839		heon	Geppetto (COCI15_geppetto)	C++11	80 / 80	6 ms	552 KiB

geppetto

#include<bits/stdc++.h>

using namespace std;

int n,m;
vector <int> relation[25];
bool bio[25];

int solve(int a){
	if(a == n) return 1;
	int ret = solve(a+1);
	bool ok = 1;
	for(auto x : relation[a]){
		if(bio[x]) ok = 0;
	}
	if(ok){
		bio[a] = 1;
		ret += solve(a+1);
		bio[a] = 0;
	}
	return ret;
}

int main(){
	cin >> n >> m;
	for(int i = 0; i < m; i++){
		int a,b;
		cin >> a >> b;
		a--,b--;
		relation[a].push_back(b);
		relation[b].push_back(a);
	}
	cout << solve(0);
}

• Subtask 1: 80 / 80