UNSW ProgComp: Problem 4 - 2005

<?php

$input = <<<END
Koalas
Platypi
Bilbies
Thylacines
Wallaroos
END;

//There are n-1 rounds
$input = explode("\n", $input);

$count = count($input);

$always_first = array_shift($input);

//var_dump($input);

if($count%2){

    //if there is an even amount of teams
    //If there is an odd amount of teams
    $input[] = "bye";
    $count++;
    for($x = 0; $x < $count-1; $x++){
        //This loop is for each round

        //there is another for for echoing (n+1)/2 lines of draw
        $out = $x+1;
        echo "Round $out:\n";
        for($y = 0; $y < ($count+1)/2-1; $y++){

            //alway first vs input[last]
            //2 vs input[last-1]
            //3 vs input[last-y]

            $first = $input[$y-1];
            $second = $input[$count-$y-2];

            if($y == 0){
                if(end($input) == 'bye'){
                    echo str_pad($always_first, 12, ' ', STR_PAD_RIGHT).end($input)."\n";
                }else{
                    echo str_pad($always_first, 12, ' ', STR_PAD_RIGHT)."vs ".end($input)."\n";
                }
            }elseif($first == 'bye' || $second == 'bye'){
                if($first == 'bye'){
                    echo str_pad($second, 12, ' ', STR_PAD_RIGHT).$first."\n";
                }else{
                    echo str_pad($first, 12, ' ', STR_PAD_RIGHT).$second."\n";
                }
            }else{
                echo str_pad($first, 12, ' ', STR_PAD_RIGHT)."vs ".$second."\n";
            }
        }
        //rotate array counter clockwise
        array_unshift($input, array_pop($input));
        //var_dump($input);
    }
}else{

    //if there is an even amount of teams
    //If there is an odd amount of teams
    //$input[] = "bye";
    for($x = 0; $x < $count-1; $x++){
        //This loop is for each round

        //there is another for for echoing (n+1)/2 lines of draw
        $out = $x+1;
        echo "Round $out:\n";
        for($y = 0; $y < ($count+1)/2-1; $y++){

            //alway first vs input[last]
            //2 vs input[last-1]
            //3 vs input[last-y]

            $first = $input[$y-1];
            $second = $input[$count-$y-2];

            if($y == 0){
                echo str_pad($always_first, 12, ' ', STR_PAD_RIGHT)."vs ".end($input)."\n";
            }else{
                echo str_pad($first, 12, ' ', STR_PAD_RIGHT)."vs ".$second."\n";
            }
        }
        //rotate array counter clockwise
        array_unshift($input, array_pop($input));
    }
}