import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int ans = 0;
		int max = 0;
		for(int i = 1 ; i <= n ; i++) {
			int mod = i;
			int cnt = 0;
			while(mod % 2  == 0) {
				mod = mod / 2;
				cnt++;
			}
			if(cnt >= max) {
				max = cnt;
				ans = i;
			}
		}
		System.out.println(ans);
		sc.close();

	}

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

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int ans = 0;
		int max = 0;
		for(int i = 1 ; i <= n ; i++) {
			int mod = i;
			int cnt = 0;
			while(mod % 2  == 0) {
				mod = mod / 2;
				cnt++;
			}
			if(cnt >= max) {
				max = cnt;
				ans = i;
			}
		}
		System.out.println(ans);
		sc.close();

	}

} Main public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int ans = 0;
		int max = 0;
		for(int i = 1 ; i <= n ; i++) {
			int mod = i;
			int cnt = 0;
			while(mod % 2  == 0) {
				mod = mod / 2;
				cnt++;
			}
			if(cnt >= max) {
				max = cnt;
				ans = i;
			}
		}
		System.out.println(ans);
		sc.close();

	} main {

		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int ans = 0;
		int max = 0;
		for(int i = 1 ; i <= n ; i++) {
			int mod = i;
			int cnt = 0;
			while(mod % 2  == 0) {
				mod = mod / 2;
				cnt++;
			}
			if(cnt >= max) {
				max = cnt;
				ans = i;
			}
		}
		System.out.println(ans);
		sc.close();

	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc int ans = 0; ans 0 int max = 0; max 0 for(int i = 1 ; i <= n ; i++) {
			int mod = i;
			int cnt = 0;
			while(mod % 2  == 0) {
				mod = mod / 2;
				cnt++;
			}
			if(cnt >= max) {
				max = cnt;
				ans = i;
			}
		} int i = 1 ; int i = 1 ; i 1 i <= n i n i++ i++ i {
			int mod = i;
			int cnt = 0;
			while(mod % 2  == 0) {
				mod = mod / 2;
				cnt++;
			}
			if(cnt >= max) {
				max = cnt;
				ans = i;
			}
		} {
			int mod = i;
			int cnt = 0;
			while(mod % 2  == 0) {
				mod = mod / 2;
				cnt++;
			}
			if(cnt >= max) {
				max = cnt;
				ans = i;
			}
		} int mod = i; mod i int cnt = 0; cnt 0 while(mod % 2  == 0) {
				mod = mod / 2;
				cnt++;
			} mod % 2  == 0 mod % 2 mod 2 0 {
				mod = mod / 2;
				cnt++;
			} mod = mod / 2 mod mod / 2 mod 2 cnt++ cnt if(cnt >= max) {
				max = cnt;
				ans = i;
			} cnt >= max cnt max {
				max = cnt;
				ans = i;
			} max = cnt max cnt ans = i ans i System.out.println(ans) System.out.println System.out System System.out ans sc.close() sc.close sc String[] args args public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int ans = 0;
		int max = 0;
		for(int i = 1 ; i <= n ; i++) {
			int mod = i;
			int cnt = 0;
			while(mod % 2  == 0) {
				mod = mod / 2;
				cnt++;
			}
			if(cnt >= max) {
				max = cnt;
				ans = i;
			}
		}
		System.out.println(ans);
		sc.close();

	}

} public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int ans = 0;
		int max = 0;
		for(int i = 1 ; i <= n ; i++) {
			int mod = i;
			int cnt = 0;
			while(mod % 2  == 0) {
				mod = mod / 2;
				cnt++;
			}
			if(cnt >= max) {
				max = cnt;
				ans = i;
			}
		}
		System.out.println(ans);
		sc.close();

	}

} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int ans = 0;
		int max = 0;
		for(int i = 1 ; i <= n ; i++) {
			int mod = i;
			int cnt = 0;
			while(mod % 2  == 0) {
				mod = mod / 2;
				cnt++;
			}
			if(cnt >= max) {
				max = cnt;
				ans = i;
			}
		}
		System.out.println(ans);
		sc.close();

	}

}
