import math._

object Main {
  def calc(A: Int, B: Int): Int = {
    var n = 1
    while (true) {
      for (i <- 1 to n) {
        val a = i
        val b = n - i

        var x = (100.0 * a) / (a + b)
        var y = (100.0 * b) / (a + b)
        x = floor(x + 0.5)
        y = floor(y + 0.5)
        if ((x == A && y == B) || (x == B && y == A))
          return n
      }
      n += 1
    }
    println("not found")
    return 0
  }

  def main(args: Array[String]) {
    val sc = new java.util.Scanner(System.in)
    val a, b = sc.nextInt

    println(calc(a, b))
  }
}