import java.util.*;
import java.lang.*;


public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int max = 0;
        int maxn = 1;
        for (int i = 1; i <= n; i++) {
            int k = i;
            int count = 0;
            while (k % 2 == 0) {
                count++;
                k /= 2;
            }
            if (count > max) {
                max = count;
                maxn = i;
            }
        }
        System.out.println(maxn);
    }
}
/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