#!/usr/bin/env fsharpi

open System;

let ParseIntN ( str : string ) =
    str.Split(' ')
    |> Array.map System.Int32.Parse

let ParseInt1 ( str : string ) =
    ParseIntN str |> fun arr -> arr.[0]

let ParseInt2 ( str : string ) =
    ParseIntN str |> fun arr -> (arr.[0],arr.[1])

let ParseInt3 ( str : string ) =
    ParseIntN str |> fun arr -> (arr.[0],arr.[1],arr.[2])

let ReadLinesN ( n : int ) =
    fun _ -> Console.ReadLine()
    |> Seq.initInfinite
    |> Seq.take n

let ReadLines =
    fun _ -> Console.ReadLine()
    |> Seq.initInfinite
    |> Seq.takeWhile ((<>) null)

let rec pi a b =
    if b = 0 then 1 else a * pi a (b-1)

let (n,k) = ParseInt2 <| Console.ReadLine()
let res = k * (pi (k - 1) (n-1))
printfn "%d" res
