#!/usr/bin/python
# -*- 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=sum+array[i]
		print sum
	except EOFError:
		break