import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        int n = Integer.parseInt(sc.next());
        int cnt = 0;
        int maxCnt = 0;
        int ans = 0;
        for (int i = 1; i <= n; i++) {
            cnt = 0;
            int divided = i;
            while (true) {
                if (divided % 2 != 0) {
                    break;
                } else {
                    divided = divided / 2;
                    cnt++;
                }
                if (cnt > maxCnt) {
                    maxCnt = cnt;
                    ans = i;
                }
            }
        }
        if (n == 1) {
            System.out.println(1);
        } else {
            System.out.println(ans);   
        }
    }
}

/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