import std.algorithm;
import std.array;
import std.conv;
import std.math;
import std.range;
import std.stdio;
import std.string;
import std.typecons;

T read(T)() { return readln.chomp.to!T; }
T[] reads(T)() { return readln.split.to!(T[]); }
alias readint = read!int;
alias readints = reads!int;

int calc(int[] xs) {
    int ans = 0;
    foreach (x; xs) {
        while (x > 0 && x % 2 == 0) {
            ans++;
            x /= 2;
        }
    }
    return ans;
}

void main() {
    readint;
    auto xs = readints;

    auto ans = calc(xs);
    writeln(ans);
}