sum = 0
mas = []
for i in range(1000):
a = int(input())
if a == 0:
break
else:
mas.append(a)
n = len(mas) # определение длины массива
for i in range(n):
if mas[i] > 99 and mas[i] < 1000 and mas[i] % 4 == 0:
sum = sum + mas[i]
print(sum)