Day4

# Part 1
# In how many assignment pairs does one range fully contain the other?
[string[]]$assignments = $puzzleInput -split '\n' | Select -SkipLast 1
$fullyContain = 0
$answers = foreach ($pair in $assignments) {
    [int]$p1l, [int]$p1h, [int]$p2l, [int]$p2h = $pair -split '-|,'
    if (($p1l -le $p2l -and $p1h -ge $p2h) -or ($p2l -le $p1l -and $p2h -ge $p1h)) {
        $fullyContain++
    }
}
$fullyContain

# Part 2
# In how many assignment pairs do the ranges overlap?
$overlap = 0
$answers = foreach ($pair in $assignments) {
    [int]$p1l, [int]$p1h, [int]$p2l, [int]$p2h = $pair -split '-|,'
    $elf1 = $p1l..$p1h
    $elf2 = $p2l..$p2h
    if (Compare $elf1 $elf2 -ExcludeDifferent -IncludeEqual) {
        $overlap++
    }
}
$overlap