import java.util.Scanner;

public class Main {

	public static void main(String[] args){

		Scanner sc = new Scanner(System.in);
		
		int n = sc.nextInt();
		
		int maxCnt = 0;
		int ans = 1;
		
		for(int i=1; i<=n; i++){

			int num = i;
			int cnt = 0;
			
			while(true){
	
				if(num % 2 == 0 && num != 0){
					num = num /2;
					cnt++;
				}
				else{
					if(maxCnt < cnt){
						maxCnt = cnt;
						ans = i;
					}
					break;
				}
			}
		}
		
		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