Advent of Code: Day 3 (Part 1)

# I modified the source beforehand to replace all spaces with commas
$lines = [IO.File]::ReadAllText("D:\scripts\Day3\Sequences.txt") -split "[\r\n]" | where {$_}

# My modification left a comma at the beginning of every line
# Remove preceding commas
for($i=0;$i -lt $lines.length; $i++){
    $lines[$i] = $lines[$i].substring(1)
}

# Set my counters
$possible = 0
$impossible = 0

# Check each line
foreach($line in $lines){
    $triangle = $line -split ','
    $a = [int]$triangle[0]
    $b = [int]$triangle[1]
    $c = [int]$triangle[2]
    if(($a + $b -gt $c) -and ($a + $c -gt $b) -and ($b + $c -gt $a)){
        $possible++
    }
    else{
        $impossible++
    }
}

write-host "Number of possible triangles" = $possible
write-host "Number of impossible triangles" = $impossible