s=0
while True:
	n=map(int,raw_input().strip().split())
	if n[0]>=1 and n[0]<=10:
		t,array=n[0],n[1:]
		for i in range(0,t):
			if array[i]%2==1:
				s += array[i]
	else:
		break
	print s
	s=0