#include<bits/stdc++.h>
using namespace std;
#define int long long
int a[1000010];
signed main(){
	freopen("number.in","r",stdin);
	freopen("number.out","w",stdout);
	int n;
	cin>>n;
	int cnt=0;
	for(int i=1;i<=n;i++){
		cin>>a[i];
		int w=a[i];
		while(w!=0){
			if(w%2==0){
				w/=2;
				cnt++;
			}else{
				break;
			}
		}
	}
	cout<<cnt;
	return 0;
}

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