function main(input) {
    const nums = input.split('\n')[1].split(' ').map(n => parseInt(n, 10));
    const 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'));