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'));