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advent-2016-day6.ps1
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advent-2016-day6.ps1
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$input = Get-Content -Path "day6.txt"
$messageLetterMap = @()
$message = ''
foreach ($line in $input.Split("`n")) {
$line = $line.Trim()
$pos = 0
# Parse room details
foreach ($character in $line.ToCharArray()) {
# Create map for this position if we haven't yet
if ($messageLetterMap.Count -le $pos) {
$messageLetterMap += @{}
}
# Increment the count this character has been found in this position
if ($messageLetterMap[$pos].Contains($character)) {
$messageLetterMap[$pos][$character] += 1;
} else {
$messageLetterMap[$pos][$character] = 1;
}
$pos++
}
}
foreach ($letterMap in $messageLetterMap) {
$letter = $letterMap.GetEnumerator() | Sort-Object @{Expression="Value"; Ascending=$false}, @{Expression="Key"; Ascending=$true} | Select-Object -First 1
$message += $letter.Key
}
Write-Output "Error corrected message: $message"