    import java.util.Scanner;
    import java.util.ArrayList;
    import java.util.Arrays;
    import java.util.List;
    import java.util.Iterator;
    import java.util.Collections;
    import java.util.Comparator;
    import java.util.Random;
    import java.util.Map;
    import java.util.HashMap;
     
    class Main{
    	public static void main(String args[]){
    		Scanner sc = new Scanner(System.in);
    		int N = sc.nextInt();
    		int[] a = new int[N];
    		for(int i=0; i<N; i++) a[i] = sc.nextInt();
    		
    		int count = 0;
    		for(int i=0; i<N; i++){
    		    while(a[i]%2 == 0){
    		        a[i] /= 2;
    		        count ++;
    		    }
    		}
    		System.out.println(count);
    	}
    }
/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