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 = 1;
    while(ans*2 <= n) {
			ans *= 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 = sc.nextInt();
     
    int ans = 1;
    while(ans*2 <= n) {
			ans *= 2;

		}
        	System.out.println(ans);
}
} Main public static void main(String[] args){
    
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
     
    int ans = 1;
    while(ans*2 <= n) {
			ans *= 2;

		}
        	System.out.println(ans);
} main {
    
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
     
    int ans = 1;
    while(ans*2 <= n) {
			ans *= 2;

		}
        	System.out.println(ans);
} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc int ans = 1; ans 1 while(ans*2 <= n) {
			ans *= 2;

		} ans*2 <= n ans*2 ans 2 n {
			ans *= 2;

		} ans *= 2 ans 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 = sc.nextInt();
     
    int ans = 1;
    while(ans*2 <= n) {
			ans *= 2;

		}
        	System.out.println(ans);
}
} public class Main {
    public static void main(String[] args){
    
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
     
    int ans = 1;
    while(ans*2 <= n) {
			ans *= 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 = sc.nextInt();
     
    int ans = 1;
    while(ans*2 <= n) {
			ans *= 2;

		}
        	System.out.println(ans);
}
}