import java.util.*;   
    public class SunnyNumberExample1  
    {   
    //driver code   
    public static void main(String args[])   
    {   
    Scanner sc = new Scanner(System.in);  
    System.out.print("Enter a number to check: ");  
    //reading a number from the user  
    int N=sc.nextInt();  
    //calling user-defined function   
    isSunnyNumber(N);   
    }       
    //function checks whether the given is a perfect square or not   
    static boolean findPerfectSquare(double num)   
    {   
    //finds the square root of the ggiven number  
    double square_root = Math.sqrt(num);   
    //if square root is an integer   
    return((square_root - Math.floor(square_root)) == 0);   
    }   
    //function that checks whether the given number is Sunny or not  
    static void isSunnyNumber(int N)   
    {   
    //checks N+1 is perfect square or not  
    if (findPerfectSquare(N + 1))   
    {   
    System.out.println("The given number is a sunny number.");   
    }   
    //executes if N+1 is not a perfect square  
    else  
    {   
    System.out.println("The given number is not a sunny number.");   
    }   
    }   
    }