import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        int digit = sc.nextInt();
        String linkingSentence = "";
        
        for (int i = 0; i <= digit; i++) {
            linkingSentence += i;
        }
        System.out.println(linkingSentence.substring(digit, digit+1));
    }
}