import java.util.*;

public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();

    if(n<10){
      System.out.println(n);
    }else if(n>=10&&n<100){
      n = n % 10;
      System.out.println(n);
    }else if(n>=100){
    n = n%100;
    n = n%10;
    System.out.println(n);
    }
  }
}