function main(arg) {
  var input = arg.trim().split('\n');
  var n = parseInt(input[0]);
  var numbers = input[1].split(' ').map(i => parseInt(i));

  count = 0;
  canDivide = true;
  while (canDivide) {
    var array = [];
    for (var i = 0; i < n; i++) {
      if (numbers[i] % 2 !== 0) {
        canDivide = false;
        console.log(count);
      } else {
        array.push(numbers[i] / 2);
      }
    }
    count++;
    numbers = array;
  }
}

main(require('fs').readFileSync('/dev/stdin', 'utf8'));
