function Main(input) {
  const data = input.trim().split("\n")
  let W = parseInt(data[0])
  let D = parseInt(data[1])
  for (D; 1 < D; D--) {
    W -= ~~(W / (D ** 2))
  }
  console.log(W)
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"))