import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();

        sc.close();

        int ans = 0;

        for (int i = 0; i < n; i++) {
            ans = (int) Math.pow(2, i);
            if (ans > n) {
                ans = (int) Math.pow(2, i - 1);
                break;
            }
        }

        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();

        sc.close();

        int ans = 0;

        for (int i = 0; i < n; i++) {
            ans = (int) Math.pow(2, i);
            if (ans > n) {
                ans = (int) Math.pow(2, i - 1);
                break;
            }
        }

        System.out.println(ans);

    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();

        sc.close();

        int ans = 0;

        for (int i = 0; i < n; i++) {
            ans = (int) Math.pow(2, i);
            if (ans > n) {
                ans = (int) Math.pow(2, i - 1);
                break;
            }
        }

        System.out.println(ans);

    } main {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();

        sc.close();

        int ans = 0;

        for (int i = 0; i < n; i++) {
            ans = (int) Math.pow(2, i);
            if (ans > n) {
                ans = (int) Math.pow(2, i - 1);
                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 sc.close() sc.close sc int ans = 0; ans 0 for (int i = 0; i < n; i++) {
            ans = (int) Math.pow(2, i);
            if (ans > n) {
                ans = (int) Math.pow(2, i - 1);
                break;
            }
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
            ans = (int) Math.pow(2, i);
            if (ans > n) {
                ans = (int) Math.pow(2, i - 1);
                break;
            }
        } {
            ans = (int) Math.pow(2, i);
            if (ans > n) {
                ans = (int) Math.pow(2, i - 1);
                break;
            }
        } ans = (int) Math.pow(2, i) ans (int) Math.pow(2, i) Math.pow Math 2 i if (ans > n) {
                ans = (int) Math.pow(2, i - 1);
                break;
            } ans > n ans n {
                ans = (int) Math.pow(2, i - 1);
                break;
            } ans = (int) Math.pow(2, i - 1) ans (int) Math.pow(2, i - 1) Math.pow Math 2 i - 1 i 1 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();

        sc.close();

        int ans = 0;

        for (int i = 0; i < n; i++) {
            ans = (int) Math.pow(2, i);
            if (ans > n) {
                ans = (int) Math.pow(2, i - 1);
                break;
            }
        }

        System.out.println(ans);

    }
} public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();

        sc.close();

        int ans = 0;

        for (int i = 0; i < n; i++) {
            ans = (int) Math.pow(2, i);
            if (ans > n) {
                ans = (int) Math.pow(2, i - 1);
                break;
            }
        }

        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();

        sc.close();

        int ans = 0;

        for (int i = 0; i < n; i++) {
            ans = (int) Math.pow(2, i);
            if (ans > n) {
                ans = (int) Math.pow(2, i - 1);
                break;
            }
        }

        System.out.println(ans);

    }
}