Submission #645866

#	Time	Username	Problem	Language	Result	Execution time	Memory
645866		TimDee	NoM (RMI21_nom)	C++17	0 / 100	1053 ms	255952 KiB

Main

#include <bits/stdc++.h>
using namespace std;

#define forn(i,n) for (int i=0; i<n; ++i)

vector<vector<int>>v;
void bf(vector<int>&vis, int n, vector<int>&s) {
	if (s.size()>=n) {
		v.push_back(s);
		return;
	}
	for (int i=1; i<=n; ++i) {
		if (vis[i]) continue;
		vis[i]=1;
		s.push_back(i);
		bf(vis,n,s);
		vis[i]=0;
		s.pop_back();
	}
}

void solve() {
	int n,m; cin>>n>>m;
	if (n>5) return;
	vector<int>vis(2*n+1,0);
	vector<int>s;
	bf(vis,2*n,s);
	int ans=0;
	for (auto a:v) {
		int paiu=1;
		forn(i,2*n) {
			for (int k=i%m; k<2*n; k+=m) {
				if (k==i) continue;
				if (abs(a[k]-a[i])==n) paiu=0;
			}
		}
		ans+=paiu;
	}
	cout<<ans;
}

int32_t main() {
	solve();
	return 0;
}

Compilation message (stderr)

Main.cpp: In function 'void bf(std::vector<int>&, int, std::vector<int>&)':
Main.cpp:8:14: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
    8 |  if (s.size()>=n) {
      |      ~~~~~~~~^~~

• Subtask 1: 0 / 9
• Subtask 2: 0 / 12
• Subtask 3: 0 / 13
• Subtask 4: 0 / 18
• Subtask 5: 0 / 48