import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		sc.close();
		StringBuilder sb = new StringBuilder();
		int i = 1;
		while(sb.length() <= n) {
			sb.append(Integer.toString(i));
			i++;
		}
		System.out.println(sb.charAt(n - 1));
	}
}