def exchange(l, m, n)
  coins = 0
  div, rem = n.divmod(25)
  coins += rem
  div, rem = (m+div).divmod(4)
  coins += rem
  (l+div) % 10 + coins
end

l = gets.to_i
m = gets.to_i
n = gets.to_i
p exchange(l, m, n)