import java.util.*;
public class Tim_so_chinh_phuong {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner sc=new Scanner(System.in);
		float a=sc.nextFloat();
		if (functions.sochinhphuong(a)==true){
			System.out.println("Day la so chinh phuong");
		}else {System.out.println("Day ko phai so chinh phuong");}
	}

}
