function main(input) {
    var nums = input.split('\n')[1].split(' ');

    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'));
