l, m, n = [int(input()) for _ in range(3)]

n_to_m = n // 25
n -= 25 * n_to_m
m += n_to_m

m_to_l = m // 4
m -= 4 * m_to_l
l += m_to_l

l_to_k = l // 10
l -= 10 * l_to_k
k = l_to_k

print(sum([l, m, n]))