import scala.annotation.tailrec

object Main extends App {

  import scala.io.StdIn._
  //calTheOtherPrice(5, 105, 13)
  solve
  @tailrec def solve: Unit = {
    val Array(x, y, s) = readLine.trim.split(' ').map(_.toInt)
    if (x == 0) return
    else {
      println(maxWithTax(x, y, s))
      solve
    }
  }
  def maxWithTax(x: Int, y: Int, sum: Int): Int = {
    (1 to sum / 2).flatMap{i ⇒ calTheOtherPrice(x, sum, i).map{o ⇒
      calPrice(y, i) + calPrice(y, o)
    }}.max
  }
  def calTheOtherPrice(x: Int, sum: Int, price:Int): Option[Int] = {
    val res = upperBound(1, sum){other ⇒
          calPrice(x, price) + calPrice(x, other) <= sum
    }
    if (res != 1 && calPrice(x, price) + calPrice(x, res - 1) == sum) Some(res - 1)
    else None
  }
  def calPrice(x: Int, price:Int): Int = {
    ((100 + x) * price / 100.0).toInt
  }
  @tailrec def upperBound(min: Int, max:Int)(func:Int ⇒ Boolean): Int = {
    val mid = (min + max) / 2
    if (min >= max) max
    else if (func(mid)) upperBound(mid + 1, max)(func)
    else upperBound(min, mid)(func)
  }
}

