import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		int n;
		n = sc.nextInt();

		sc.close();

		int ans = 0, i = 0, tmp = 1;

		while (true) {
			if (n < tmp)
				break;
			if (n == tmp)
				ans = tmp;
			tmp *= 2;
		}

		if (ans == 0)
			ans = tmp / 2;
		System.out.println(ans);

	}

} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		int n;
		n = sc.nextInt();

		sc.close();

		int ans = 0, i = 0, tmp = 1;

		while (true) {
			if (n < tmp)
				break;
			if (n == tmp)
				ans = tmp;
			tmp *= 2;
		}

		if (ans == 0)
			ans = tmp / 2;
		System.out.println(ans);

	}

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

		int n;
		n = sc.nextInt();

		sc.close();

		int ans = 0, i = 0, tmp = 1;

		while (true) {
			if (n < tmp)
				break;
			if (n == tmp)
				ans = tmp;
			tmp *= 2;
		}

		if (ans == 0)
			ans = tmp / 2;
		System.out.println(ans);

	} main {
		Scanner sc = new Scanner(System.in);

		int n;
		n = sc.nextInt();

		sc.close();

		int ans = 0, i = 0, tmp = 1;

		while (true) {
			if (n < tmp)
				break;
			if (n == tmp)
				ans = tmp;
			tmp *= 2;
		}

		if (ans == 0)
			ans = tmp / 2;
		System.out.println(ans);

	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n; n n = sc.nextInt() n sc.nextInt() sc.nextInt sc sc.close() sc.close sc int ans = 0 ans 0 i = 0 i 0 tmp = 1; tmp 1 while (true) {
			if (n < tmp)
				break;
			if (n == tmp)
				ans = tmp;
			tmp *= 2;
		} true {
			if (n < tmp)
				break;
			if (n == tmp)
				ans = tmp;
			tmp *= 2;
		} if (n < tmp)
				break; n < tmp n tmp break; if (n == tmp)
				ans = tmp; n == tmp n tmp ans = tmp ans tmp tmp *= 2 tmp 2 if (ans == 0)
			ans = tmp / 2; ans == 0 ans 0 ans = tmp / 2 ans tmp / 2 tmp 2 System.out.println(ans) System.out.println System.out System System.out ans String[] args args public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		int n;
		n = sc.nextInt();

		sc.close();

		int ans = 0, i = 0, tmp = 1;

		while (true) {
			if (n < tmp)
				break;
			if (n == tmp)
				ans = tmp;
			tmp *= 2;
		}

		if (ans == 0)
			ans = tmp / 2;
		System.out.println(ans);

	}

} public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		int n;
		n = sc.nextInt();

		sc.close();

		int ans = 0, i = 0, tmp = 1;

		while (true) {
			if (n < tmp)
				break;
			if (n == tmp)
				ans = tmp;
			tmp *= 2;
		}

		if (ans == 0)
			ans = tmp / 2;
		System.out.println(ans);

	}

} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		int n;
		n = sc.nextInt();

		sc.close();

		int ans = 0, i = 0, tmp = 1;

		while (true) {
			if (n < tmp)
				break;
			if (n == tmp)
				ans = tmp;
			tmp *= 2;
		}

		if (ans == 0)
			ans = tmp / 2;
		System.out.println(ans);

	}

}
