Complete 2024 day1
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@ -51,9 +51,22 @@ function diffSum (array $list1, array $list2): int
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return $sum;
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return $sum;
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}
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}
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function similarityScore (array $list1, array $list2): int
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{
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$sum = 0;
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foreach ($list1 as $search)
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{
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$rightList = array_filter($list2, fn (int $item) => $item === $search);
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$sum += ($search * count($rightList));
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}
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return $sum;
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}
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[$list1, $list2] = parseLists();
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[$list1, $list2] = parseLists();
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$sumOfDifference = diffSum($list1, $list2);
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$sumOfDifference = diffSum($list1, $list2);
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$similarityScore = similarityScore($list1, $list2);
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echo "Part 1: Total distance: $sumOfDifference\n";
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echo "Part 1: Total distance: $sumOfDifference\n";
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echo "Part 2: Similarity score: $similarityScore\n";
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