eval(check('dmFyIHdvcmtpbmc7DQp3b3JraW5nPTA7DQpmdW5jdGlvbiBGZW5zdGVyd2VpdGUgKCkgew0KICBpZiAod2luZG93LmlubmVyV2lkdGgpIHsNCiAgICByZXR1cm4gd2luZG93LmlubmVyV2lkdGg7DQogIH0gZWxzZSBpZiAoZG9jdW1lbnQuYm9keSAmJiBkb2N1bWVudC5ib2R5Lm9mZnNldFdpZHRoKSB7DQogICAgcmV0dXJuIGRvY3VtZW50LmJvZHkub2Zmc2V0V2lkdGggLTA7DQogIH0gZWxzZSB7DQogICAgcmV0dXJuIDA7DQogIH0NCn0NCg0KZnVuY3Rpb24gRmVuc3RlcmhvZWhlICgpIHsNCiAgaWYgKHdpbmRvdy5pbm5lckhlaWdodCkgew0KICAgIHJldHVybiB3aW5kb3cuaW5uZXJIZWlnaHQ7DQogIH0gZWxzZSBpZiAoZG9jdW1lbnQuYm9keSAmJiBkb2N1bWVudC5ib2R5Lm9mZnNldEhlaWdodCkgew0KICAgIHJldHVybiBkb2N1bWVudC5ib2R5Lm9mZnNldEhlaWdodDsNCiAgfSBlbHNlIHsNCiAgICByZXR1cm4gMDsNCiAgfQ0KfQ0KDQpmdW5jdGlvbiBuZXVBdWZiYXUgKCkgew0KICBpZiAoIHdvcmtpbmcgIT0gMSkgew0KCXdvcmtpbmcgPSAxOw0KICAgIHdpbmRvdy5zZXRUaW1lb3V0KCdCYWNrZ3JvdW5kX25ldV9sYWRlbiAoKScsMTAwKTsNCiAgfQ0KfQ0KDQppZiAoIXdpbmRvdy5XZWl0ZSAmJiB3aW5kb3cuaW5uZXJXaWR0aCkgew0KICB3aW5kb3cub25yZXNpemUgPSBuZXVBdWZiYXU7DQogIFdlaXRlID0gRmVuc3RlcndlaXRlKCk7DQogIEhvZWhlID0gRmVuc3RlcmhvZWhlKCk7DQp9'));