import java.util.*;

class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();	
        int[] array = new int[200];
        for(int i = 0 ; i < n ; i ++){
          array[i] = sc.nextInt();
        }
      	int count = 0;
      	boolean flg = true;
      while(flg){
      	for(int i = 0 ; i < n ; i++){
        	if(array[i] % 2 != 0){
            	flg = false;
              break;
            }
          	array[i] /= 2;
        }
        if(!flg) {
        	break;
        }
      	count ++;
      }
      
System.out.print(count);


    }
}

/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