import java.util.*;

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

            if (flag == false) break;
            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