import java.util.*;

public class Main {

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

        int count = 0;
        int res = 0;
        for (int i = 1; i <= n; i++) {
            int targetNumber = i;
            int tmpCount = 0;
            while (targetNumber % 2 == 0) {
                tmpCount++;
                targetNumber /= 2;
            }

            if (count < tmpCount) {
                res = i;
                count = tmpCount;
            }
        }

        System.out.println(n == 1 ? 1 : res);
    }
}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz