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

if N >= 25:
    c, d = divmod(N, 25)
    M += c
    exchangedN = d
else:
    exchangedN = N

if M >= 4:
    a, b = divmod(M, 4)
    L += a
    exchangedM = b
else:
    exchangedM = M

exchangedL = L if L < 10 else L % 10


print(exchangedL + exchangedM + exchangedN)