import 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(0==0){
      if(ans*2<=N){
        ans*=2;
      }
      else{
        break;
      }
    }
    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 ans = 1;
    while(0==0){
      if(ans*2<=N){
        ans*=2;
      }
      else{
        break;
      }
    }
    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(0==0){
      if(ans*2<=N){
        ans*=2;
      }
      else{
        break;
      }
    }
    System.out.println(ans);
  } main {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    int ans = 1;
    while(0==0){
      if(ans*2<=N){
        ans*=2;
      }
      else{
        break;
      }
    }
    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(0==0){
      if(ans*2<=N){
        ans*=2;
      }
      else{
        break;
      }
    } 0==0 0 0 {
      if(ans*2<=N){
        ans*=2;
      }
      else{
        break;
      }
    } if(ans*2<=N){
        ans*=2;
      }
      else{
        break;
      } ans*2<=N ans*2 ans 2 N {
        ans*=2;
      } ans*=2 ans 2 {
        break;
      } 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 = sc.nextInt();
    int ans = 1;
    while(0==0){
      if(ans*2<=N){
        ans*=2;
      }
      else{
        break;
      }
    }
    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(0==0){
      if(ans*2<=N){
        ans*=2;
      }
      else{
        break;
      }
    }
    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 ans = 1;
    while(0==0){
      if(ans*2<=N){
        ans*=2;
      }
      else{
        break;
      }
    }
    System.out.println(ans);
  }
}
