import java.util.Scanner;
public class Main{
  public static void main(String [] args){
    Scanner stdIn = new Scanner(System.in);
   /* int n = stdIn.nextInt();
    int [] Array = new int[n];
    
    for(int i = 0; i < Array.length; i++) {
    	Array[i] = stdIn.nextInt();
    }
    
    int sum = 0;
    int a = 0;
    Outer:
    do{
      a++;
    	for(int i = 0; i < Array.length; i++){
      		if(Array[i]%2!=0) break Outer;
      		else Array[i]/=2;
      		if(i==n-1){ 
              sum++;
              a --;
            }
    	}
    }while(a==0);
    
    System.out.println(sum);*/
    int n = stdIn.nextInt();
    int[]a = new int[n];
    for(int i = 0; i < n; i++) {
    	a[i] = stdIn.nextInt();
    }
    
    int cnt = 0;
    
    Outer:while(true) {
    	for(int i = 0; i < n; i++) {
    		if(a[i]%2!=0){
    			break Outer;
    		}
    		a[i]/=2;
    	}
    	cnt++;
    	
    	
    }
    
    System.out.println(cnt);
    
    
    
  }
} import java.util.Scanner; Scanner java.util public class Main{
  public static void main(String [] args){
    Scanner stdIn = new Scanner(System.in);
   /* int n = stdIn.nextInt();
    int [] Array = new int[n];
    
    for(int i = 0; i < Array.length; i++) {
    	Array[i] = stdIn.nextInt();
    }
    
    int sum = 0;
    int a = 0;
    Outer:
    do{
      a++;
    	for(int i = 0; i < Array.length; i++){
      		if(Array[i]%2!=0) break Outer;
      		else Array[i]/=2;
      		if(i==n-1){ 
              sum++;
              a --;
            }
    	}
    }while(a==0);
    
    System.out.println(sum);*/
    int n = stdIn.nextInt();
    int[]a = new int[n];
    for(int i = 0; i < n; i++) {
    	a[i] = stdIn.nextInt();
    }
    
    int cnt = 0;
    
    Outer:while(true) {
    	for(int i = 0; i < n; i++) {
    		if(a[i]%2!=0){
    			break Outer;
    		}
    		a[i]/=2;
    	}
    	cnt++;
    	
    	
    }
    
    System.out.println(cnt);
    
    
    
  }
} Main public static void main(String [] args){
    Scanner stdIn = new Scanner(System.in);
   /* int n = stdIn.nextInt();
    int [] Array = new int[n];
    
    for(int i = 0; i < Array.length; i++) {
    	Array[i] = stdIn.nextInt();
    }
    
    int sum = 0;
    int a = 0;
    Outer:
    do{
      a++;
    	for(int i = 0; i < Array.length; i++){
      		if(Array[i]%2!=0) break Outer;
      		else Array[i]/=2;
      		if(i==n-1){ 
              sum++;
              a --;
            }
    	}
    }while(a==0);
    
    System.out.println(sum);*/
    int n = stdIn.nextInt();
    int[]a = new int[n];
    for(int i = 0; i < n; i++) {
    	a[i] = stdIn.nextInt();
    }
    
    int cnt = 0;
    
    Outer:while(true) {
    	for(int i = 0; i < n; i++) {
    		if(a[i]%2!=0){
    			break Outer;
    		}
    		a[i]/=2;
    	}
    	cnt++;
    	
    	
    }
    
    System.out.println(cnt);
    
    
    
  } main {
    Scanner stdIn = new Scanner(System.in);
   /* int n = stdIn.nextInt();
    int [] Array = new int[n];
    
    for(int i = 0; i < Array.length; i++) {
    	Array[i] = stdIn.nextInt();
    }
    
    int sum = 0;
    int a = 0;
    Outer:
    do{
      a++;
    	for(int i = 0; i < Array.length; i++){
      		if(Array[i]%2!=0) break Outer;
      		else Array[i]/=2;
      		if(i==n-1){ 
              sum++;
              a --;
            }
    	}
    }while(a==0);
    
    System.out.println(sum);*/
    int n = stdIn.nextInt();
    int[]a = new int[n];
    for(int i = 0; i < n; i++) {
    	a[i] = stdIn.nextInt();
    }
    
    int cnt = 0;
    
    Outer:while(true) {
    	for(int i = 0; i < n; i++) {
    		if(a[i]%2!=0){
    			break Outer;
    		}
    		a[i]/=2;
    	}
    	cnt++;
    	
    	
    }
    
    System.out.println(cnt);
    
    
    
  } Scanner stdIn = new Scanner(System.in); stdIn new Scanner(System.in) int n = stdIn.nextInt(); n stdIn.nextInt() stdIn.nextInt stdIn int[]a = new int[n]; a new int[n] n for(int i = 0; i < n; i++) {
    	a[i] = stdIn.nextInt();
    } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
    	a[i] = stdIn.nextInt();
    } {
    	a[i] = stdIn.nextInt();
    } a[i] = stdIn.nextInt() a[i] a i stdIn.nextInt() stdIn.nextInt stdIn int cnt = 0; cnt 0 System.out.println(cnt) System.out.println System.out System System.out cnt String [] args args public class Main{
  public static void main(String [] args){
    Scanner stdIn = new Scanner(System.in);
   /* int n = stdIn.nextInt();
    int [] Array = new int[n];
    
    for(int i = 0; i < Array.length; i++) {
    	Array[i] = stdIn.nextInt();
    }
    
    int sum = 0;
    int a = 0;
    Outer:
    do{
      a++;
    	for(int i = 0; i < Array.length; i++){
      		if(Array[i]%2!=0) break Outer;
      		else Array[i]/=2;
      		if(i==n-1){ 
              sum++;
              a --;
            }
    	}
    }while(a==0);
    
    System.out.println(sum);*/
    int n = stdIn.nextInt();
    int[]a = new int[n];
    for(int i = 0; i < n; i++) {
    	a[i] = stdIn.nextInt();
    }
    
    int cnt = 0;
    
    Outer:while(true) {
    	for(int i = 0; i < n; i++) {
    		if(a[i]%2!=0){
    			break Outer;
    		}
    		a[i]/=2;
    	}
    	cnt++;
    	
    	
    }
    
    System.out.println(cnt);
    
    
    
  }
} public class Main{
  public static void main(String [] args){
    Scanner stdIn = new Scanner(System.in);
   /* int n = stdIn.nextInt();
    int [] Array = new int[n];
    
    for(int i = 0; i < Array.length; i++) {
    	Array[i] = stdIn.nextInt();
    }
    
    int sum = 0;
    int a = 0;
    Outer:
    do{
      a++;
    	for(int i = 0; i < Array.length; i++){
      		if(Array[i]%2!=0) break Outer;
      		else Array[i]/=2;
      		if(i==n-1){ 
              sum++;
              a --;
            }
    	}
    }while(a==0);
    
    System.out.println(sum);*/
    int n = stdIn.nextInt();
    int[]a = new int[n];
    for(int i = 0; i < n; i++) {
    	a[i] = stdIn.nextInt();
    }
    
    int cnt = 0;
    
    Outer:while(true) {
    	for(int i = 0; i < n; i++) {
    		if(a[i]%2!=0){
    			break Outer;
    		}
    		a[i]/=2;
    	}
    	cnt++;
    	
    	
    }
    
    System.out.println(cnt);
    
    
    
  }
} Main
import java.util.Scanner;
public class Main{
  public static void main(String [] args){
    Scanner stdIn = new Scanner(System.in);
   /* int n = stdIn.nextInt();
    int [] Array = new int[n];
    
    for(int i = 0; i < Array.length; i++) {
    	Array[i] = stdIn.nextInt();
    }
    
    int sum = 0;
    int a = 0;
    Outer:
    do{
      a++;
    	for(int i = 0; i < Array.length; i++){
      		if(Array[i]%2!=0) break Outer;
      		else Array[i]/=2;
      		if(i==n-1){ 
              sum++;
              a --;
            }
    	}
    }while(a==0);
    
    System.out.println(sum);*/
    int n = stdIn.nextInt();
    int[]a = new int[n];
    for(int i = 0; i < n; i++) {
    	a[i] = stdIn.nextInt();
    }
    
    int cnt = 0;
    
    Outer:while(true) {
    	for(int i = 0; i < n; i++) {
    		if(a[i]%2!=0){
    			break Outer;
    		}
    		a[i]/=2;
    	}
    	cnt++;
    	
    	
    }
    
    System.out.println(cnt);
    
    
    
  }
}