import java.util.*;
public class Main{
	public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
      	int n = sc.nextInt();
      	int[] a = new int[n];
      	for(int i = 0; i < n; i++){
        	a[i] = sc.nextInt();
        }
      
      	int ans = 0;
      	while(true){
        	boolean exist = false;//a[i]がすべて奇数かどうか
          	for(int i = 0; i < n; i++){
            	if(a[i]%2 != 0) exist = true;
            }
          	if(exist) break;
          	for(int i = 0; i < n; i++){
            	a[i] /= 2;
            }
          	ans++;
        }
      	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