$v === 1)); class UtilIO { // ToDo // bool をフレーズに変換して返す。そのときに、それらを Capital か Pascal か Lower かで選択 // 配列を implode する補助 protected const YES = "YES"; protected const NO = "NO"; protected function __construct() { } public static function getString():string { return trim(fgets(STDIN)); } public static function getInt():int { return intval(static::getString()); } public static function getStringArray($separator = " "):array { return explode($separator, static::getString()); } public static function getIntArray($separator = " "):array { return array_map('intval', static::getStringArray($separator)); } public static function echoYNCapital(bool $b) { static::echo($b ? UtilIO::YES : UtilIO::NO); } public static function echoYNPascal(bool $b) { static::echo($b ? ucwords(strtolower(UtilIO::YES)) : ucwords(strtolower(UtilIO::NO))); } public static function echoYNLower(bool $b) { static::echo($b ? strtolower(UtilIO::YES) : strtolower(UtilIO::NO)); } public static function echo(mixed $value):void { if(is_string($value)) { echo static::toLine($value); return; } if(is_numeric($value)) { echo static::toLine(strval($value)); return; } if(is_array($value)) { foreach($value as $v) { static::echo($v); } return; } var_export($value); } public static function toLine(string $str):string { return trim($str).PHP_EOL; } } function array_every(array $array, callable $callback, int $mode = 0): bool { foreach($array as $k => $v) { if(!arrayCallbackDelegate($callback, $k, $v, $mode)) return false; } return true; } function array_some(array $array, callable $callback, int $mode = 0): bool { foreach($array as $k => $v) { if(arrayCallbackDelegate($callback, $k, $v, $mode)) return true; } return false; } function array_zip(array $first, array $second, callable $callback): array { $result = []; foreach($first as $k => $v) { $result[$k] = $callback($v, $second[$k]); } return $result; } function arrayCallbackDelegate(callable $fn, string|int $key, mixed $value, int $mode = 0):mixed { return match ($mode) { ARRAY_FILTER_USE_BOTH => $fn($key, $value), ARRAY_FILTER_USE_KEY => $fn($key), default => $fn($value), }; } class Triple { private array $items = []; public function __construct(array $array) { if(count($array) !== 3) throw new UnexpectedValueException("Array length should be 3."); if(array_some($array,fn($e) => !is_int($e))) throw new UnexpectedValueException("Every element should be integer."); $this->items = $array; } public function is_kadomatsu():bool { if ($this->items[0] === $this->items[1]) return false; if ($this->items[0] === $this->items[2]) return false; if ($this->items[1] === $this->items[2]) return false; if ($this->items[1] === max($this->items)) return true; if ($this->items[1] === min($this->items)) return true; return false; } public function getElementOf(int $index):int { if($index < 0 || $index > 2) throw UnexpectedValueException("Out of range: $index"); return $this->items[$index]; } #[Pure] public function exchange(int $index, int $value):Triple { $array = $this->items; $array[$index] = $value; return new Triple($array); } }