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'));