function main(input) {
  var nums = input.split('\n')[1].split(' ').map((n) => parseInt(n));
  var cnt = 0;
  while (nums.every((n) => n%2 === 0)) {
    ++cnt;
    nums = nums.map((n) => n/2);
  }
  console.log(cnt);
}
main(require('fs').readFileSync('/dev/stdin', 'utf8'));