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);
	}
} import java.util.*; util.* java 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);
	}
} 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);
	} main {
		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);
	} Scanner sc=new Scanner(System.in); sc new Scanner(System.in) int N=sc.nextInt(); N sc.nextInt() sc.nextInt sc int[] A=new int[N]; A new int[N] N int count=0; count 0 for(int i=0;i<N;i++){
			A[i]=sc.nextInt();
		} int i=0; int i=0; i 0 i<N i N i++ i++ i {
			A[i]=sc.nextInt();
		} {
			A[i]=sc.nextInt();
		} A[i]=sc.nextInt() A[i] A i sc.nextInt() sc.nextInt sc System.out.println(count) System.out.println System.out System System.out count String[] args args
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);
	}
}