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<?php $nums = [1,1,1,2,2,3]; $k = 2; function max_keys(array $nums, int $k): array { for ($i = 0; $i < count($nums); $i++) { $counts[$nums[$i]] = isset($counts[$nums[$i]]) ? $counts[$nums[$i]] + 1 : 1; } arsort($counts); return array_slice(array_keys($counts), 0, $k); } print_r(max_keys($nums, $k));
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