privateblue

Keybase proof

I hereby claim:

• I am privateblue on github.
• I am mikolajszabo (https://keybase.io/mikolajszabo) on keybase.
• I have a public key ASBPSbXL4MOm_Zallxta1cyZqgEZSGT0IMRGzLHaK-Owrgo

To claim this, I am signing this object:

privateblue

case class Point(x: Int, y: Int) {
  lazy val neighbours = Set(Point(x-1,y), Point(x+1,y), Point(x,y-1), Point(x,y+1))
}

case class Polyomino(squares: Set[Point]) {
  def op(f: Point => Point) = copy(squares = squares.map(f))
  
  val order = squares.size

  lazy val mx = if (squares.isEmpty) 0 else squares.map(_.x).max

privateblue

object nqueens1 {
  import math._

  case class V(x: Int, y: Int) {
    def -(v: V): V = V(x - v.x, y - v.y)
  }

  def solve(n: Int): List[V] = attempt(n, grid(n), List())

  // given an expected queen count, a list of still available squares, and a

privateblue

object nqueens2 {
  import math._

  case class V(x: Int, y: Int) {
    def -(v: V): V = V(x - v.x, y - v.y)

    def +(v: V): V = V(x + v.x, y + v.y)

    def lineWith(v: V, n: Int): List[V] = extend(v, n) ++ v.extend(this, n)