function main(input) {
  var nums = input
    .split("\n")[1]
    .split(" ")
    .map(function (n) {
      parseInt(n, 10);
    });

  var count = 0;
  while (
    nums.every(function (n) {
      n % 2 === 0;
    })
  ) {
    count++;
    nums.map(function (n) {
      n / 2;
    });
  }

  console.log(count);
}


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