1) { $n = strval(array_sum(array_map('intval',str_split($n)))); } UtilIO::echo($n); class UtilIO { // ToDo // bool をフレーズに変換して返す。そのときに、それらを Capital か Pascal か Lower かで選択 // 配列を implode する補助 protected const YES = "YES"; protected const NO = "NO"; protected function __construct() { } public static function getString():string { return trim(fgets(STDIN)); } public static function getInt():int { return intval(static::getString()); } public static function getStringArray($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 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), }; }