def tax(rate, base)
  base * (100 + rate) / 100
end

while true
  a = gets.split(" ").map(&:to_i)
  break if a == [0,0,0]
  max = 0
  for i in 1..(a[2]-1)
    for j in i..(a[2]-1)
      if (tax(a[0],i)+tax(a[0],j)) == a[2]
        max = [max, tax(a[1],i)+tax(a[1],j)].max
      end
    end
  end
  puts max
end