coins = $stdin.read.split(?\n).map(&:to_i)

c1 = coins[2].divmod(25)
c1mod = c1[1]
ex25c = c1[0]
c25 = (coins[1] + ex25c).divmod(4)
c25mod = c25[1]
c100mod = (coins[0] + c25[0]) % 10

puts c1mod + c25mod + c100mod