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

exchangedL = L if L < 10 else L % 10

if M < 4:
    exchangedM = M 
else:
    a, b = divmod(M, 4)
    exchangedL += a
    exchangedM = b

if N < 25:
    exchangedN = N 
else:
    c, d = divmod(N, 25)
    exchangedM += c
    exchangedN = d


print(exchangedL + exchangedM + exchangedN)