import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = Integer.parseInt(sc.next());
		sc.close();

		int count = 0;
		int ans = 0;
		for(int i = 0; i <= 7; i++) {
			int tmp = (int) Math.floor(Math.pow(2, i));
			if(tmp <= N) {
				continue;
			}else {
				ans = (int) Math.floor(Math.pow(2, i - 1));
				break;
			}
		}
		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 = Integer.parseInt(sc.next());
		sc.close();

		int count = 0;
		int ans = 0;
		for(int i = 0; i <= 7; i++) {
			int tmp = (int) Math.floor(Math.pow(2, i));
			if(tmp <= N) {
				continue;
			}else {
				ans = (int) Math.floor(Math.pow(2, i - 1));
				break;
			}
		}
		System.out.println(ans);
	}

} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = Integer.parseInt(sc.next());
		sc.close();

		int count = 0;
		int ans = 0;
		for(int i = 0; i <= 7; i++) {
			int tmp = (int) Math.floor(Math.pow(2, i));
			if(tmp <= N) {
				continue;
			}else {
				ans = (int) Math.floor(Math.pow(2, i - 1));
				break;
			}
		}
		System.out.println(ans);
	} main {
		Scanner sc = new Scanner(System.in);
		int N = Integer.parseInt(sc.next());
		sc.close();

		int count = 0;
		int ans = 0;
		for(int i = 0; i <= 7; i++) {
			int tmp = (int) Math.floor(Math.pow(2, i));
			if(tmp <= N) {
				continue;
			}else {
				ans = (int) Math.floor(Math.pow(2, i - 1));
				break;
			}
		}
		System.out.println(ans);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N = Integer.parseInt(sc.next()); N Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc sc.close() sc.close sc int count = 0; count 0 int ans = 0; ans 0 for(int i = 0; i <= 7; i++) {
			int tmp = (int) Math.floor(Math.pow(2, i));
			if(tmp <= N) {
				continue;
			}else {
				ans = (int) Math.floor(Math.pow(2, i - 1));
				break;
			}
		} int i = 0; int i = 0; i 0 i <= 7 i 7 i++ i++ i {
			int tmp = (int) Math.floor(Math.pow(2, i));
			if(tmp <= N) {
				continue;
			}else {
				ans = (int) Math.floor(Math.pow(2, i - 1));
				break;
			}
		} {
			int tmp = (int) Math.floor(Math.pow(2, i));
			if(tmp <= N) {
				continue;
			}else {
				ans = (int) Math.floor(Math.pow(2, i - 1));
				break;
			}
		} int tmp = (int) Math.floor(Math.pow(2, i)); tmp (int) Math.floor(Math.pow(2, i)) Math.floor Math Math.pow(2, i) Math.pow Math 2 i if(tmp <= N) {
				continue;
			}else {
				ans = (int) Math.floor(Math.pow(2, i - 1));
				break;
			} tmp <= N tmp N {
				continue;
			} continue; {
				ans = (int) Math.floor(Math.pow(2, i - 1));
				break;
			} ans = (int) Math.floor(Math.pow(2, i - 1)) ans (int) Math.floor(Math.pow(2, i - 1)) Math.floor Math Math.pow(2, i - 1) Math.pow Math 2 i - 1 i 1 break; 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 = Integer.parseInt(sc.next());
		sc.close();

		int count = 0;
		int ans = 0;
		for(int i = 0; i <= 7; i++) {
			int tmp = (int) Math.floor(Math.pow(2, i));
			if(tmp <= N) {
				continue;
			}else {
				ans = (int) Math.floor(Math.pow(2, i - 1));
				break;
			}
		}
		System.out.println(ans);
	}

} public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = Integer.parseInt(sc.next());
		sc.close();

		int count = 0;
		int ans = 0;
		for(int i = 0; i <= 7; i++) {
			int tmp = (int) Math.floor(Math.pow(2, i));
			if(tmp <= N) {
				continue;
			}else {
				ans = (int) Math.floor(Math.pow(2, i - 1));
				break;
			}
		}
		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 = Integer.parseInt(sc.next());
		sc.close();

		int count = 0;
		int ans = 0;
		for(int i = 0; i <= 7; i++) {
			int tmp = (int) Math.floor(Math.pow(2, i));
			if(tmp <= N) {
				continue;
			}else {
				ans = (int) Math.floor(Math.pow(2, i - 1));
				break;
			}
		}
		System.out.println(ans);
	}

}