import java.util.*;
import static java.lang.Math.*;
import java.math.BigInteger;

public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		// 入力
		int n = sc.nextInt();
		int result = Integer.MAX_VALUE;
		for(int i = 0; i < n; i++){
		    int a = sc.nextInt();
		    int tmp = 0;
		    while(a%2 == 0){
		        tmp++;
		        a /= 2;
		    }
		    result = min(result, tmp);
		}
		
		// 計算
		
		// 出力
		System.out.println(result);
	}
}
 import java.util.*; util.* java import static java.lang.Math.*; import static java.lang.Math.*; import static java.lang.Math.*; import java.math.BigInteger; BigInteger java.math public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		// 入力
		int n = sc.nextInt();
		int result = Integer.MAX_VALUE;
		for(int i = 0; i < n; i++){
		    int a = sc.nextInt();
		    int tmp = 0;
		    while(a%2 == 0){
		        tmp++;
		        a /= 2;
		    }
		    result = min(result, tmp);
		}
		
		// 計算
		
		// 出力
		System.out.println(result);
	}
} Main public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		// 入力
		int n = sc.nextInt();
		int result = Integer.MAX_VALUE;
		for(int i = 0; i < n; i++){
		    int a = sc.nextInt();
		    int tmp = 0;
		    while(a%2 == 0){
		        tmp++;
		        a /= 2;
		    }
		    result = min(result, tmp);
		}
		
		// 計算
		
		// 出力
		System.out.println(result);
	} main {
		Scanner sc = new Scanner(System.in);
		
		// 入力
		int n = sc.nextInt();
		int result = Integer.MAX_VALUE;
		for(int i = 0; i < n; i++){
		    int a = sc.nextInt();
		    int tmp = 0;
		    while(a%2 == 0){
		        tmp++;
		        a /= 2;
		    }
		    result = min(result, tmp);
		}
		
		// 計算
		
		// 出力
		System.out.println(result);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc int result = Integer.MAX_VALUE; result Integer.MAX_VALUE Integer Integer.MAX_VALUE for(int i = 0; i < n; i++){
		    int a = sc.nextInt();
		    int tmp = 0;
		    while(a%2 == 0){
		        tmp++;
		        a /= 2;
		    }
		    result = min(result, tmp);
		} int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
		    int a = sc.nextInt();
		    int tmp = 0;
		    while(a%2 == 0){
		        tmp++;
		        a /= 2;
		    }
		    result = min(result, tmp);
		} {
		    int a = sc.nextInt();
		    int tmp = 0;
		    while(a%2 == 0){
		        tmp++;
		        a /= 2;
		    }
		    result = min(result, tmp);
		} int a = sc.nextInt(); a sc.nextInt() sc.nextInt sc int tmp = 0; tmp 0 while(a%2 == 0){
		        tmp++;
		        a /= 2;
		    } a%2 == 0 a%2 a 2 0 {
		        tmp++;
		        a /= 2;
		    } tmp++ tmp a /= 2 a 2 result = min(result, tmp) result min(result, tmp) min result tmp System.out.println(result) System.out.println System.out System System.out result String[] args args public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		// 入力
		int n = sc.nextInt();
		int result = Integer.MAX_VALUE;
		for(int i = 0; i < n; i++){
		    int a = sc.nextInt();
		    int tmp = 0;
		    while(a%2 == 0){
		        tmp++;
		        a /= 2;
		    }
		    result = min(result, tmp);
		}
		
		// 計算
		
		// 出力
		System.out.println(result);
	}
} public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		// 入力
		int n = sc.nextInt();
		int result = Integer.MAX_VALUE;
		for(int i = 0; i < n; i++){
		    int a = sc.nextInt();
		    int tmp = 0;
		    while(a%2 == 0){
		        tmp++;
		        a /= 2;
		    }
		    result = min(result, tmp);
		}
		
		// 計算
		
		// 出力
		System.out.println(result);
	}
} Main
import java.util.*;
import static java.lang.Math.*;
import java.math.BigInteger;

public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		// 入力
		int n = sc.nextInt();
		int result = Integer.MAX_VALUE;
		for(int i = 0; i < n; i++){
		    int a = sc.nextInt();
		    int tmp = 0;
		    while(a%2 == 0){
		        tmp++;
		        a /= 2;
		    }
		    result = min(result, tmp);
		}
		
		// 計算
		
		// 出力
		System.out.println(result);
	}
}

