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

Mplus = N // 25
newN = N % 25

Lplus = (M+Mplus) // 4
newM = (M+Mplus) % 4

Oplus = (Lplus + L) // 10
newL = (Lplus + L) % 10

print(newN + newL + newM)