import strutils, math
const
  n = 3
  t = [10, 4, 25]
var LMN: array[n , int]

for i in countup(0, n - 1):
  LMN[i] = stdin.readLine.parseInt

for i in countdown(n - 1, 0):
  if i != 0: LMN[i - 1] += LMN[i] div t[i]
  LMN[i] = LMN[i] mod t[i]

echo LMN.sum