import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int[] a = new int[n];
        for (int i = 0; i < a.length; i++) {
            a[i] = sc.nextInt();
        }
        int ans = 0;
        while(true) {
            boolean flg = true;
            for (int i = 0; i < a.length; i++) {
                if(a[i] % 2 != 0) {
                    flg = false;
                    break;
                } else {
                    a[i] /= 2;
                }
            }
            if(flg) {
                ans++;
            } else {
                break;
            }
        }
        System.out.println(ans);
    }
} import java.util.Scanner; Scanner java.util public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int[] a = new int[n];
        for (int i = 0; i < a.length; i++) {
            a[i] = sc.nextInt();
        }
        int ans = 0;
        while(true) {
            boolean flg = true;
            for (int i = 0; i < a.length; i++) {
                if(a[i] % 2 != 0) {
                    flg = false;
                    break;
                } else {
                    a[i] /= 2;
                }
            }
            if(flg) {
                ans++;
            } else {
                break;
            }
        }
        System.out.println(ans);
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int[] a = new int[n];
        for (int i = 0; i < a.length; i++) {
            a[i] = sc.nextInt();
        }
        int ans = 0;
        while(true) {
            boolean flg = true;
            for (int i = 0; i < a.length; i++) {
                if(a[i] % 2 != 0) {
                    flg = false;
                    break;
                } else {
                    a[i] /= 2;
                }
            }
            if(flg) {
                ans++;
            } else {
                break;
            }
        }
        System.out.println(ans);
    } main {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int[] a = new int[n];
        for (int i = 0; i < a.length; i++) {
            a[i] = sc.nextInt();
        }
        int ans = 0;
        while(true) {
            boolean flg = true;
            for (int i = 0; i < a.length; i++) {
                if(a[i] % 2 != 0) {
                    flg = false;
                    break;
                } else {
                    a[i] /= 2;
                }
            }
            if(flg) {
                ans++;
            } else {
                break;
            }
        }
        System.out.println(ans);
    } 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 for (int i = 0; i < a.length; i++) {
            a[i] = sc.nextInt();
        } int i = 0; int i = 0; i 0 i < a.length i a.length a a.length i++ i++ i {
            a[i] = sc.nextInt();
        } {
            a[i] = sc.nextInt();
        } a[i] = sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc int ans = 0; ans 0 while(true) {
            boolean flg = true;
            for (int i = 0; i < a.length; i++) {
                if(a[i] % 2 != 0) {
                    flg = false;
                    break;
                } else {
                    a[i] /= 2;
                }
            }
            if(flg) {
                ans++;
            } else {
                break;
            }
        } true {
            boolean flg = true;
            for (int i = 0; i < a.length; i++) {
                if(a[i] % 2 != 0) {
                    flg = false;
                    break;
                } else {
                    a[i] /= 2;
                }
            }
            if(flg) {
                ans++;
            } else {
                break;
            }
        } boolean flg = true; flg true for (int i = 0; i < a.length; i++) {
                if(a[i] % 2 != 0) {
                    flg = false;
                    break;
                } else {
                    a[i] /= 2;
                }
            } int i = 0; int i = 0; i 0 i < a.length i a.length a a.length i++ i++ i {
                if(a[i] % 2 != 0) {
                    flg = false;
                    break;
                } else {
                    a[i] /= 2;
                }
            } {
                if(a[i] % 2 != 0) {
                    flg = false;
                    break;
                } else {
                    a[i] /= 2;
                }
            } if(a[i] % 2 != 0) {
                    flg = false;
                    break;
                } else {
                    a[i] /= 2;
                } a[i] % 2 != 0 a[i] % 2 a[i] a i 2 0 {
                    flg = false;
                    break;
                } flg = false flg false break; {
                    a[i] /= 2;
                } a[i] /= 2 a[i] a i 2 if(flg) {
                ans++;
            } else {
                break;
            } flg {
                ans++;
            } ans++ ans {
                break;
            } break; System.out.println(ans) System.out.println System.out System System.out ans String[] args args public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int[] a = new int[n];
        for (int i = 0; i < a.length; i++) {
            a[i] = sc.nextInt();
        }
        int ans = 0;
        while(true) {
            boolean flg = true;
            for (int i = 0; i < a.length; i++) {
                if(a[i] % 2 != 0) {
                    flg = false;
                    break;
                } else {
                    a[i] /= 2;
                }
            }
            if(flg) {
                ans++;
            } else {
                break;
            }
        }
        System.out.println(ans);
    }
} public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int[] a = new int[n];
        for (int i = 0; i < a.length; i++) {
            a[i] = sc.nextInt();
        }
        int ans = 0;
        while(true) {
            boolean flg = true;
            for (int i = 0; i < a.length; i++) {
                if(a[i] % 2 != 0) {
                    flg = false;
                    break;
                } else {
                    a[i] /= 2;
                }
            }
            if(flg) {
                ans++;
            } else {
                break;
            }
        }
        System.out.println(ans);
    }
} Main
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int[] a = new int[n];
        for (int i = 0; i < a.length; i++) {
            a[i] = sc.nextInt();
        }
        int ans = 0;
        while(true) {
            boolean flg = true;
            for (int i = 0; i < a.length; i++) {
                if(a[i] % 2 != 0) {
                    flg = false;
                    break;
                } else {
                    a[i] /= 2;
                }
            }
            if(flg) {
                ans++;
            } else {
                break;
            }
        }
        System.out.println(ans);
    }
}