void plusMinus(vector<int> arr) {
	int p = 0, n = 0, z = 0;
	for(int el : arr){
		if(el > 0) 
			p++;
		else if(el < 0) 
			n++;
		else 
			z++;
	}
	double total = arr.size();
	double pr = p / total;
	double nr = n / total;
	double zr = z / total;

	// Set the output to print 6 decimal places
	cout << fixed << setprecision(6);
	// Print each result on a new line
	cout << fixed << setprecision(6);
	cout << pr << "\n" << nr << "\n" << zr;
}