import java.util.Scanner;
public class taShiJiWeiShu {
public static void main(String[] args) {
@SuppressWarnings("resource")
Scanner in = new Scanner(System.in);
int num = in.nextInt();
int amount = 0;
do
{
num = num / 10;
amount++;
}while(num > 0);
System.out.println("它是个"+amount+"位数");
}
}