import sys

data = input()
L = int(data)
if L < 0 or L > 1000:
	raise
	sys.exit()	

data = input()
M = int(data)
if M < 0 or M > 1000:
	raise
	sys.exit()

data = input()
N = int(data)
if N < 0 or N > 1000:
	raise
	sys.exit()

O = 0

while(N >= 25):
	N -= 25
	M += 1

while(M >= 4):
	M -= 4
	L += 1

while(L >= 10):
	L -= 10
	O += 1

print(L+M+N)