#include <iostream>
using namespace std;

int main() {
	int n, count = 0;
	cin >> n; 
	int arr[n];
	for (int i = 0; i < n; i++){
		cin >> arr[i];
		if (arr[i] < 0){
			count++;
		}
	}
	if(count == 0){
		cout << "NO";
	} else {
		cout << count << endl;
		for (int c = n - 1; c >= 0; c--){
			if (arr[c] < 0){
				cout << arr[c] << " "; 
			}
		}
	}
	return 0;
}