mirror of
https://github.com/paradizelost/AdventOfCode2020.git
synced 2024-11-25 02:44:45 -06:00
68 lines
2.1 KiB
PowerShell
68 lines
2.1 KiB
PowerShell
function Get-OpenSeatCount {
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param (
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[int]$seatrow,
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[int]$seatnum,
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$seatmap
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)
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$positionstocheck=@{}
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$positionstocheck.add('UpperLeft',@(($seatrow -1),($seatnum -1)))
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$positionstocheck.add('UpperMiddle',@(($seatrow -1),($seatnum)))
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$positionstocheck.add('UpperRight',@(($seatrow -1),($seatnum +1)))
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$positionstocheck.add('Left',@(($seatrow),($seatnum -1)))
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$positionstocheck.add('Right',@(($seatrow),($seatnum +1)))
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$positionstocheck.add('LowerLeft',@(($seatrow +1),($seatnum -1)))
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$positionstocheck.add('LowerMiddle',@(($seatrow +1),($seatnum)))
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$positionstocheck.add('LowerRight',@(($seatrow +1),($seatnum +1)))
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$occupiedSeats=0
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foreach($position in $positionstocheck.keys){
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$row,$num = $positionstocheck.$position
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$myrow = $seatmap[$row]
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try{
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if($myrow[$num] -eq '#'){
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$occupiedSeats++
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}
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} catch{
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}
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}
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return [int]$occupiedSeats
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}
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function proc-Seats(){
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param(
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$seatmap
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)
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for($row=0;$row -lt $seatmap.count; $row++){
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for($seatnum=0; $seatnum -lt ($seatmap[$row].ToCharArray().count); $seatnum++){
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if($seatmap[$row][$seatnum] -ne '.'){
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$occupiedseats = Get-OpenSeatCount -seatrow $row -seatnum $seatnum -seatmap $seatmap
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#write-host "Occupied Around $occupiedseats, SEATNUM $seatnum, SEATROW $row"
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$myrow = $seatmap[$row].tochararray()
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if( $occupiedseats -ge 4){
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$myrow[$seatnum]='L'
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$seatmap[$row]=$myrow -join ""
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} else {
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$myrow[$seatnum]='#'
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$seatmap[$row]=$myrow -join ""
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}
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}
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}
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}
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$seatmap
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}
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$seatmap = @(get-content .\aocd11input.txt)
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$nochangesin=0
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$loopnum=0
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do{
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$loopnum++
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write-host "Loop $loopnum"
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$oldseatmap = @($seatmap)
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$seatmap = proc-Seats -seatmap $seatmap
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if(($oldseatmap -join "") -eq ($seatmap -join "")){
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$nochangesin++
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}
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#$seatmap
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} while (
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$nochangesin -lt 3
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)
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(($seatmap -join "").tochararray()|?{$_ -eq '#'}).count
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