function main (input) {
    const args = input.split('\n');
  	const n = args[0];
  	const a = args[1].split(' ');
  	var flg = true;
  	var cnt = 0;
  while (flg) {
    for (var i = 0; i<n; i++) {
      if (a[i]%2 != 0) {
        flg = false;
      }
    a[i] = a[i]/2;
    } cnt++;
  }
  console.log(cnt -1);
}
main(require('fs').readFileSync('/dev/stdin', 'utf8'));