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dan 2020-12-11 16:58:59 -06:00
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Advent Of Code Day 11-part2.ps1 Normal file
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Function Get-StringHash([String] $String,$HashName = "MD5")
{
$StringBuilder = New-Object System.Text.StringBuilder
[System.Security.Cryptography.HashAlgorithm]::Create($HashName).ComputeHash([System.Text.Encoding]::UTF8.GetBytes($String))|%{
[Void]$StringBuilder.Append($_.ToString("x2"))
}
$StringBuilder.ToString()
}
function Get-OpenSeatCount {
param (
[int]$seatrow,
[int]$seatnum,
$seatmap
)
# write-host "$(Get-StringHash -String ($seatmap -join ''))"
$positionstocheck=@{
'UpperLeft'=@(($seatrow -1),($seatnum -1))
'UpperMiddle'=@(($seatrow -1),($seatnum))
'UpperRight'=@(($seatrow -1),($seatnum +1))
'Left'=@(($seatrow),($seatnum -1))
'Right'=@(($seatrow),($seatnum +1))
'LowerLeft'=@(($seatrow +1),($seatnum -1))
'LowerMiddle'=@(($seatrow +1),($seatnum))
'LowerRight'=@(($seatrow +1),($seatnum +1))
}
#write-host $positionstocheck
#write-host "SEATROW: $seatrow SEATNUM: $seatnum"
$adjacentseats=""
foreach($position in $positionstocheck.keys){
$thisrow, $thisseat = $positionstocheck[$position]
if($thisrow -eq -1){
continue
}
if($thisrow -gt $seatmap.count -1){
continue
}
if($thisseat -eq -1){
continue
}
if($thisseat -gt $seatmap[$seatrow].length -1){
continue
}
$myposition = $positionstocheck[$position]
$row = $myposition[0]
#write-host "$row"
$seat = $myposition[1]
#write-host "$seat"
#write-host $seatmap[$row]
$myrow = $seatmap[$row].ToCharArray()
$myseat = $myrow[$seat]
$hadproblem=$false
do{
#write-host "ROW: $ROW SEAT: $SEAT"
if($myseat -ne '#'){
try{
switch ($position){
"UpperLeft" {
$row = $row+1
$seat = $seat-1
$myrow = $seatmap[$row].ToCharArray()
$myseat = $myrow[$seat]
};
"UpperMiddle" {
$row = $row+1
#$seat = $seat+1
$myrow = $seatmap[$row].ToCharArray()
$myseat = $myrow[$seat]
};
"UpperRight" {
$row = $row+1
$seat = $seat+1
$myrow = $seatmap[$row].ToCharArray()
$myseat = $myrow[$seat]
};
"Left" {
#$row = $row+1
$seat = $seat-1
$myrow = $seatmap[$row].ToCharArray()
$myseat = $myrow[$seat]
};
"Right" {
#$row = $row+1
$seat = $seat+1
$myrow = $seatmap[$row].ToCharArray()
$myseat = $myrow[$seat]
};
"LowerLeft"{
$row = $row-1
$seat = $seat-1
$myrow = $seatmap[$row].ToCharArray()
$myseat = $myrow[$seat]
};
"LowerMiddle"{
$row = $row-1
#$seat = $seat+1
#write-host $row
$myrow = $seatmap[$row].ToCharArray()
$myseat = $myrow[$seat]
};
"LowerRight"{
$row = $row-1
$seat = $seat+1
$myrow = $seatmap[$row].ToCharArray()
$myseat = $myrow[$seat]
};
}
} catch{
write-host "Reached end"
read-host "ISSUE?!"
$hadproblem = $true
}
}
} while ( ($myseat -ne '#') -and ($hadproblem=$false))
$adjacentseats += $myrow[$seat]
}
#write-host "Adjacent Seats $adjacentseats"
return ($adjacentseats.tochararray()|?{$_ -eq '#'}).count
}
function proc-Seats(){
param(
$seatmap
)
$origmap = $seatmap.clone()
#$myseatmap= $seatmap.clone()
#$myseatmap=$seatmap
for($row=0;$row -lt $seatmap.count; $row++){
for($seatnum=0; $seatnum -lt ($seatmap[$row].ToCharArray().count); $seatnum++){
if($seatmap[$row][$seatnum] -ne '.'){
$occupiedseats = Get-OpenSeatCount -seatrow $row -seatnum $seatnum -seatmap $origmap
#write-host "Occupied Around $occupiedseats, SEATNUM $seatnum, SEATROW $row"
if( $occupiedseats -ge 5){
#write-host $occupiedseats
$myrow = $seatmap[$row].tochararray()
$myrow[$seatnum]='L'
$seatmap[$row]=$myrow -join ""
} elseif ($occupiedseats -eq 0) {
#write-host $occupiedseats
$myrow = $seatmap[$row].tochararray()
$myrow[$seatnum]='#'
$seatmap[$row]=$myrow -join ""
}
}
}
}
$seatmap
}
$seatmap = @(get-content .\aocd11input.txt)
#$seatmap=@('L.LL.LL.LL','LLLLLLL.LL','L.L.L..L..','LLLL.LL.LL','L.LL.LL.LL','L.LLLLL.LL','..L.L.....','LLLLLLLLLL','L.LLLLLL.L','L.LLLLL.LL')
$repeat=$false
$loopnum=0
$optionhashes = @()
do{
$maphash =Get-StringHash -String ($seatmap -join '')
$loopnum++
write-host "Loop $loopnum"
write-host $maphash
$seatmap = @(proc-Seats -seatmap $seatmap)
$seatmap
if($optionhashes -contains $maphash ){
write-host "Repeat detected. Stopping"
$repeat=$true
} else {
$optionhashes += $maphash
}
#read-host
} while (
$repeat -eq $false
)
(($seatmap -join "").tochararray()|?{$_ -eq '#'}).count