import java.util.*;
class Main{
	public static void main(String[] args){
		Scanner sc=new Scanner(System.in);
		int N=sc.nextInt();
		int[] A=new int[N];
		int count=0;
		for(int i=0;i<N;i++){
			A[i]=sc.nextInt();
		}
		Out:while(true){
			for(int i=0;i<N;i++){
				if(A[i]%2 != 0){
					break Out;
				}
				A[i]/=2;
			}
			count++;
		}
		System.out.println(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