import scala.io.StdIn.readLine

@main def yuki2850(): Unit =
  val abcd = readLine.split(" ").map(_.toInt)
  val (a, b, c, d) = (abcd(0), abcd(1), abcd(2), abcd(3))
  val x = if a == 0 then 1 << 30 else c / a
  val y = if b == 0 then 1 << 30 else d / b
  println(x.min(y))