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