import java.util.*;
import java.lang.*;
import java.io.*;

// The main method must be in a class named "Main".
class Main {
    public static void main(String[] args) {
       
       Scanner vik= new Scanner ( System.in);
       
       
       
        System.out.println("write a number");
         
        // int a1= vik.nextInt();

        
       
        Boolean a = vik.hasNextInt();       
         
         
         
           System.out.prinln(a)
            
         
         
         
         // for character
         
         
         
 
 
 
 
 
  }
}