'use strict'
 
function Main(input) {
  let nums = input.split('\n')[1].split(' ').map(n => parseInt(n, 10));

  let count = 0;
  while(nums.every(num => num % 2 === 0)) {
    count ++;
    nums = nums.map(n => n / 2);
  }

  console.log(count);
}
 
Main(require('fs').readFileSync('/dev/stdin', 'utf8'));