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https://github.com/paradizelost/AdventOfCode2020.git
synced 2024-11-25 02:44:45 -06:00
70 lines
2.3 KiB
PowerShell
70 lines
2.3 KiB
PowerShell
get-date
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$inputdata=import-csv -header "Number" .\aocd9input.txt
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$inputdata | %{$_.Number = [int64]$_.Number}
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$buffer=25
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$mynumbers=$inputdata[0 .. 24] | select-object -ExpandProperty Number
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$tolookfor=-1
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for($i=25; $i -lt $inputdata.count; $i++){
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$minval = (($mynumbers|Sort-Object )[0 .. 1] |measure-object -sum | select-object -ExpandProperty sum)[0]
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$maxval = (($mynumbers|Sort-Object )[-2 .. -1] |measure-object -sum | select-object -ExpandProperty sum)[0]
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$newnum = $inputdata[$i].Number
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#write-host "Prior $($mynumbers[-1]) : $newnum"
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if($newnum -lt $minval){
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#write-host "ERROR $newnum too low"
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$tolookfor = $newnum
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break
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}
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if($newnum -gt $maxval){
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#write-host "ERROR $newnum too high"
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$tolookfor = $newnum
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break
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}
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$possiblevalues = @()
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for($b=0;$b -lt $mynumbers.Count;$b++){
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$mynum=$mynumbers[$b]
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for($a=1;$a -lt $mynumbers.count;$a++ ){
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$nextnum = $mynumbers[$a]
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if($mynum -eq $nextnum){
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#write-host "$mynum is same as $nextnum"
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continue
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}
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$possiblevalues += $mynum + $nextnum
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}
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}
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if($possiblevalues -notcontains $newnum){
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#write-host "ERROR $newnum not a sum of prior $buffer numbers"
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$tolookfor = $newnum
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break
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}
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$null,$mynumbers=$mynumbers
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$mynumbers += $newnum
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}
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$howmanynums=2
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$found=$false
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if($tolookfor -eq -1){
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throw "Invalid Input for final check"
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}
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write-host "Part 1 Answer is $tolookfor"
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foreach($num in ($howmanynums .. $inputdata.count)){
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if($found){break}
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for($i=0;$i -lt $inputdata.count - $num; $i++){
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if($found){
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$break
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}
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$possiblevalues = @()
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$mynums = $inputdata[$i .. ($i + $num -1)]|Select-Object -ExpandProperty Number
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$mysum = $mynums | Measure-Object -sum | Select-Object -ExpandProperty Sum
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if($mysum -eq $tolookfor){
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$minnum = ($mynums | Measure-Object -minimum).minimum
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$maxnum = ($mynums | Measure-Object -Maximum).Maximum
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# write-host "$mynums sum to $mysum"
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# write-host "Smallest $minnum + Largest $maxnum = $($minnum + $maxnum)"
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write-host "Part 2 answer is $($minnum + $maxnum)"
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$found=$true
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break
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}
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#write-host "$mynums : $mysum"
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}
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}
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get-date |