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'));
