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'));