a,b,c = map(int, input().split())
#a = 1yen
#b = 25yen
#c = 100yen
qa, amod = divmod(a, 25)
b = b + qa
qb, bmod = divmod(b, 4)
c = c + qb
qc, cmod = divmod(c, 10)
print(amod + bmod + cmod)