l_100 = int(input())
m_25 = int(input())
n_1 = int(input())
ans = 0

n_1_ans = divmod(n_1,25)
ans += n_1_ans[1]

m_25 += n_1_ans[0] 
m_25_ans = divmod(m_25,4)
ans += m_25_ans[1]

l_100 += m_25_ans[0]
l_100_ans = divmod(l_100,10)
ans += l_100_ans[1]

print(ans)