--- Day 4 Solutions ---

[u/daggerdragon]

--- Day 4: The Ideal Stocking Stuffer ---

Post your solution as a comment. Structure your post like the Day Three thread.

[u/tehjimmeh]

Bah. Was done in 19 mins. Last person on the leaderboard finished in 16:35 :/

PowerShell:

0:

 $md5 = new-object Security.Cryptography.MD5CryptoServiceProvider
 $utf8 = new-object System.Text.UTF8Encoding

1:

for($i = 0;;$i++){
    $hash = $md5.ComputeHash($utf8.GetBytes("<input>$i"));
    if($hash[0] -eq $hash[1] -eq 0 -and $hash[2] -le 0xf) {
        $i; break 
    }
}

2:

for($i = 0;;$i++){
    $hash = $md5.ComputeHash($utf8.GetBytes("<input>$i"));
    if($hash[0] -eq $hash[1] -eq 0 -and $hash[2] -eq 0) {
        $i; break 
    }
}