#! -*- coding: UTF-8 -*-
while True:  
    try:  
        data = map(int, raw_input().strip().split())  
        n, array = data[0], data[1:]  
        sum = 0  
        for i in range(n):
			if array[i]%2==1:
				sum += array[i]  
        print sum 
    except EOFError:  
        raise