inputs = [int(i) for i in input().split()]
a = inputs[0]
b = inputs[1]
c = inputs[2]

def calc(a, b, c):
	q1, mod1 = divmod(a, 25)
	b += q1

	q2, mod2 = divmod(b, 4)

	c += q2
	q3, mod3 = divmod(c, 10)

	return mod1 + mod2 + mod3
	
print(calc(a, b, c))