fn(int $b):int => $a + $b; $mul = fn(int $a):callable => fn(int $b):int => $a * $b; $op = $bs[0] === "+" ? $add : $mul; $b = array_map('intval',array_slice($bs,1)); while($n > 0) { UtilIO::echo(implode(" ",array_map($op(UtilIO::getInt()),$b))); $n--; } class UtilIO { protected const YES = "YES"; protected const NO = "NO"; protected function __construct() { } public static function getString():string { return trim(fgets(STDIN)); } public static function getInt():int { return intval(static::getString()); } public static function getStringArray($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; } }