import java.util.*;

class InputNumber 
{
    public static void main(String[] args) 
    {
        Scanner input=new Scanner(System.in);
        System.out.print("Enter number: ");
        int num=input.nextInt();
        int largest=0;
        while( num > 0 ){
        int digit = num % 10;
        num = num / 10;
        if (digit > largest) 
        largest = digit;
        }
        System.out.println("Highest digit is: "+largest);
        }
    }