/* package whatever; // don't place package name! */

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

/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	private static BigInteger hundred = BigInteger.valueOf(100);
	public static void main (String[] args) throws java.lang.Exception
	{
		System.out.println("Дай мне трехзначное число");
        Scanner in = new Scanner(System.in);
        BigInteger num = in.nextBigInteger();
        while (num.compareTo(hundred) < 0){
            System.out.println("Чё-то мало. Нужно минимум трехзначное");
            num = in.nextBigInteger();
        }
        System.out.println(num);
	}
}