function Main(input){
    var nums = input.split('\n')[1].split(' ').map((n) => parseInt(n, 10));
    var count = 0;
    while(nums.every((n) => (n % 2) === 0)) {
        count++;
        nums = nums.map((n) => n / 2);
    }

    console.log(count);
}
Main(require('fs').readFileSync('/dev/stdin', 'utf8'));