import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int N = scan.nextInt();
		scan.close();
		if(N == 0) {
			System.out.println(100);
			System.exit(0);
		}else if(N == 1000000) {
			System.out.println(0);
			System.exit(0);
		}
		int M = 1000000;
		double x = 100 * N;
		double y = M - x;
		double k1 = 0.99 * x;
		double k2 = 0.01 * y;
		double ans = k2 / (k1 + k2) * 100;
		System.out.println(ans);
	}
}