import std.stdio, std.conv, std.string, std.bigint;
import std.math, std.random, std.datetime;
import std.array, std.range, std.algorithm, std.container;
string read(){ static string[] ss; while(!ss.length) ss = readln.chomp.split; string res = ss[0]; ss.popFront; return res; }

void main(){
	long n = read.to!long;
	long[] as = readln.chomp.split.to!(long[]);
	
	long ans;
	foreach(a; as) while(a % 2 == 0) a /= 2, ans += 1;
	
	ans.writeln;
	}