import java.util.*;
class Main{
	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		int n = s.nextInt();
		long ans = 0;
		for(int i = 0;i < n;i++){
			int val = s.nextInt();
			int ele = val;
			int count = 0;
			while(true){
				if(ele%2!=0)
					break;
				ele = ele/2;
				count++;
			}
			ans += count;
		}
			System.out.println(ans);
	}
}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz