32 lines
758 B
PHP
32 lines
758 B
PHP
|
<?php
|
||
|
|
|
||
|
|
$players = explode("\n\n", file_get_contents('input.txt'));
|
||
|
|
|
||
|
|
[$cards_1, $cards_2] = $players;
|
||
|
|
$cards_1 = explode("\n", $cards_1);
|
||
|
|
array_shift($cards_1);
|
||
|
|
$cards_2 = explode("\n", $cards_2);
|
||
|
|
array_shift($cards_2);
|
||
|
|
|
||
|
|
while (!empty($cards_1) && !empty($cards_2)) {
|
||
|
|
$card_1 = array_shift($cards_1);
|
||
|
|
$card_2 = array_shift($cards_2);
|
||
|
|
$cards = [$card_1, $card_2];
|
||
|
|
rsort($cards);
|
||
|
|
if ($card_1 > $card_2) {
|
||
|
|
$cards_1 = array_merge($cards_1, $cards);
|
||
|
|
} else {
|
||
|
|
$cards_2 = array_merge($cards_2, $cards);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
$final_deck = empty($cards_1) ? $cards_2 : $cards_1;
|
||
|
|
|
||
|
|
$final_deck = array_reverse($final_deck);
|
||
|
|
|
||
|
|
$sum = 0;
|
||
|
|
for ($i = 1, $l = count($final_deck); $i <= $l; $i++) {
|
||
|
|
$sum += ($i * $final_deck[$i-1]);
|
||
|
|
}
|
||
|
|
|
||
|
|
echo $sum;
|