def tax(p,x)
  p*(100+x)/100
end

loop do
  x,y,s = gets.split.map(&:to_i)
  break if x == 0
  max = 0
  for a in 1...s
    for b in 1...s
      max = [max, tax(a,y)+tax(b,y)].max if tax(a,x)+tax(b,x) == s
    end
  end
  puts max
end