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