L = int(input())
M = int(input())
N = int(input())

coin_num = []
if N < 25:
    coin_num.append(N)
else:
    nq, nr = divmod(N, 25)
    coin_num.append(nr)
    M = M + nq

if M < 4:
    coin_num.append(M)
else:
    mq, mr = divmod(M, 4)
    coin_num.append(mr)
    L = L + mq

if L < 10:
    coin_num.append(L)
else:
    lq, lr = divmod(L, 10)
    coin_num.append(lr)

print(sum(coin_num))