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<?php final class ArrayUtils { public static function containsSum($data, $sum) { $visited = []; foreach ($data as $v) { if (isset($visited[$sum - $v])) { return true; } $visited[$v] = true; } return false; } } $data = range(0, 49999); shuffle($data); var_dump(ArrayUtils::containsSum($data, 1220)); var_dump(ArrayUtils::containsSum($data, -7));
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.26, 7.3.0 - 7.3.13, 7.4.0 - 7.4.1
bool(true) bool(false)
preferences:
132.79 ms | 402 KiB | 157 Q