65 lines
1.8 KiB
PHP
65 lines
1.8 KiB
PHP
<?php
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namespace trizz\AdventOfCode\Y22;
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use trizz\AdventOfCode\Solution;
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use trizz\AdventOfCode\Y22\Day2\RPS;
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final class Day2 extends Solution
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{
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public static int|string|null $part1ExampleResult = 15;
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public static int|string|null $part1Result = 10994;
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public static int|string|null $part2ExampleResult = 12;
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public static int|string|null $part2Result = 12526;
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public function part1(array $data): int
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{
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$score = 0;
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foreach ($data as $round) {
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[$opponentDraw, $ownDraw] = explode(' ', $round);
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$ownDraw = RPS::fromPuzzleInput($ownDraw);
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$opponentDraw = RPS::fromPuzzleInput($opponentDraw);
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$score += $this->calculateScore($ownDraw, $opponentDraw);
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}
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return $score;
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}
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public function part2(array $data): int
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{
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$score = 0;
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foreach ($data as $round) {
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[$opponentDraw, $expectedResult] = explode(' ', $round);
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$opponentDraw = RPS::fromPuzzleInput($opponentDraw);
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$score += match ($expectedResult) {
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'X' => $this->calculateScore($opponentDraw->losingOpposite(), $opponentDraw),
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'Y' => $this->calculateScore($opponentDraw, $opponentDraw),
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'Z' => $this->calculateScore($opponentDraw->winningOpposite(), $opponentDraw),
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default => 0,
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};
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}
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return $score;
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}
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private function calculateScore(RPS $ownDraw, RPS $opponentDraw): int
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{
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// Win
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if ($ownDraw->losingOpposite() === $opponentDraw) {
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return $ownDraw->score() + 6;
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}
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// Lost
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if ($ownDraw->winningOpposite() === $opponentDraw) {
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return $ownDraw->score();
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}
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// Draw.
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return $ownDraw->score() + 3;
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}
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}
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