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;
    for(int i = 0; i < 10; i++) {
      if((2 * ans) <= 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;
    for(int i = 0; i < 10; i++) {
      if((2 * ans) <= 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;
    for(int i = 0; i < 10; i++) {
      if((2 * ans) <= n) {
        ans *= 2;
      } else {
        break;
      }
    }
    System.out.println(ans);
  } main {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int ans = 1;
    for(int i = 0; i < 10; i++) {
      if((2 * ans) <= 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 for(int i = 0; i < 10; i++) {
      if((2 * ans) <= n) {
        ans *= 2;
      } else {
        break;
      }
    } int i = 0; int i = 0; i 0 i < 10 i 10 i++ i++ i {
      if((2 * ans) <= n) {
        ans *= 2;
      } else {
        break;
      }
    } {
      if((2 * ans) <= n) {
        ans *= 2;
      } else {
        break;
      }
    } if((2 * ans) <= n) {
        ans *= 2;
      } else {
        break;
      } (2 * ans) <= n (2 * ans) 2 ans 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;
    for(int i = 0; i < 10; i++) {
      if((2 * ans) <= 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;
    for(int i = 0; i < 10; i++) {
      if((2 * ans) <= 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;
    for(int i = 0; i < 10; i++) {
      if((2 * ans) <= n) {
        ans *= 2;
      } else {
        break;
      }
    }
    System.out.println(ans);
  }
}