[
'name' => 'Codeforces',
'short_name' => 'CF',
'url' => 'https://codeforces.com',
'not_exists_texts' => [
'| Actions | ',
'Statement is not available on English language',
'ограничение по времени на тест',
],
'languages' => ['C', 'C++', 'C++17', 'C++20', 'Java17', 'Pascal', 'Python2', 'Python3'],
],
'atcoder' => [
'name' => 'AtCoder',
'short_name' => 'AT',
'url' => 'https://atcoder.jp',
'not_exists_texts' => [
'Task not found',
'指定されたタスクが見つかりません',
],
'languages' => ['C', 'C++', 'Java11', 'Python3', 'Pascal'],
],
'uoj' => [
'name' => 'UniversalOJ',
'short_name' => 'UOJ',
'url' => 'https://uoj.ac',
'not_exist_texts' => [
'未找到该页面',
],
'languages' => ['C', 'C++03', 'C++11', 'C++', 'C++17', 'C++20', 'Python3', 'Python2.7', 'Java8', 'Java11', 'Java17', 'Pascal'],
],
'loj' => [
'name' => 'LibreOJ',
'short_name' => 'LOJ',
'url' => 'https://loj.ac',
'languages' => ['C', 'C++03', 'C++11', 'C++', 'C++17', 'C++20', 'Python3', 'Python2.7', 'Java17', 'Pascal'],
],
'luogu' => [
'name' => '洛谷',
'short_name' => '洛谷',
'url' => 'https://www.luogu.com.cn',
'languages' => [],
],
];
static function curl_get($url) {
$curl = new Curl\Curl();
$curl->setUserAgent(static::USER_AGENT);
$res = retry_loop(function () use (&$curl, $url) {
$curl->get($url);
if ($curl->error) {
return false;
}
return [
'content-type' => $curl->responseHeaders['Content-Type'],
'response' => $curl->response,
];
});
return $res;
}
static function getCodeforcesProblemUrl($id) {
if (str_starts_with($id, 'GYM')) {
return static::$providers['codeforces']['url'] . '/gym/' . preg_replace_callback('/GYM([1-9][0-9]{0,5})([A-Z][1-9]?)/', fn ($matches) => $matches[1] . '/problem/' . $matches[2], $id);
}
return static::$providers['codeforces']['url'] . '/problemset/problem/' . preg_replace_callback('/([1-9][0-9]{0,5})([A-Z][1-9]?)/', fn ($matches) => $matches[1] . '/' . $matches[2], $id);
}
static function getAtcoderProblemUrl($id) {
return static::$providers['atcoder']['url'] . '/contests/' . preg_replace_callback('/(\w+)([a-z][1-9]?)/', function ($matches) {
$contest = str_replace('_', '', $matches[1]);
if (str_ends_with($matches[1], '_')) {
return "{$contest}/tasks/{$matches[1]}{$matches[2]}";
}
return "{$contest}/tasks/{$matches[1]}_{$matches[2]}";
}, $id);
}
static function getUojProblemUrl($id) {
return static::$providers['uoj']['url'] . '/problem/' . $id;
}
static function getLojProblemUrl($id) {
return static::$providers['loj']['url'] . '/p/' . $id;
}
static function getLuoguProblemUrl($id) {
return static::$providers['luogu']['url'] . '/problem/' . $id;
}
static function getCodeforcesProblemBasicInfoFromHtml($id, $html) {
$remote_provider = static::$providers['codeforces'];
$html = preg_replace('/\$\$\$/', '$', $html);
$dom = new \IvoPetkov\HTML5DOMDocument();
$dom->loadHTML($html);
$judgestatement = $dom->querySelector('html')->innerHTML;
foreach ($remote_provider['not_exists_texts'] as $text) {
if (str_contains($judgestatement, $text)) {
return null;
}
}
$statement_dom = $dom->querySelector('.problem-statement');
$title_prefix = str_starts_with($id, 'GYM') ? 'Gym' : 'CF';
$title = explode('. ', trim($statement_dom->querySelector('.title')->innerHTML))[1];
$title_id = str_starts_with($id, 'GYM') ? substr($id, 3) : $id;
$title = "【{$title_prefix}{$title_id}】{$title}";
$time_limit = intval(substr($statement_dom->querySelector('.time-limit')->innerHTML, 53));
$memory_limit = intval(substr($statement_dom->querySelector('.memory-limit')->innerHTML, 55));
$difficulty = -1;
foreach ($dom->querySelectorAll('.tag-box') as &$elem) {
$matches = [];
if (preg_match('/\*([0-9]{3,4})/', trim($elem->innerHTML), $matches)) {
$difficulty = intval($matches[1]);
break;
}
}
if ($difficulty != -1) {
$closest = null;
foreach (UOJProblem::$difficulty as $val) {
if ($closest === null || abs($val - $difficulty) < abs($closest - $difficulty)) {
$closest = $val;
}
}
$difficulty = $closest;
}
$statement_dom->removeChild($statement_dom->querySelector('.header'));
$statement_dom->childNodes->item(0)->insertBefore($dom->createElement('h3', 'Description'), $statement_dom->childNodes->item(0)->childNodes->item(0));
foreach ($statement_dom->querySelectorAll('.section-title') as &$elem) {
$elem->outerHTML = '' . $elem->innerHTML . '
';
}
$sample_input_cnt = 0;
$sample_output_cnt = 0;
foreach ($statement_dom->querySelectorAll('.input') as &$input_dom) {
$sample_input_cnt++;
$input_text = '';
if ($input_dom->querySelector('.test-example-line')) {
foreach ($input_dom->querySelectorAll('.test-example-line') as &$line) {
$input_text .= HTML::stripTags($line->innerHTML) . "\n";
}
} else {
$input_text = HTML::stripTags($input_dom->querySelector('pre')->innerHTML);
}
$input_dom->outerHTML = HTML::tag('h4', [], "Input #{$sample_input_cnt}") . HTML::tag('pre', [], HTML::tag('code', [], $input_text));
}
foreach ($statement_dom->querySelectorAll('.output') as &$output_dom) {
$sample_output_cnt++;
$output_text = '';
if ($output_dom->querySelector('.test-example-line')) {
foreach ($output_dom->querySelectorAll('.test-example-line') as &$line) {
$output_text .= HTML::stripTags($line->innerHTML) . "\n";
}
} else {
$output_text = HTML::stripTags($output_dom->querySelector('pre')->innerHTML);
}
$output_dom->outerHTML = HTML::tag('h4', [], "Output #{$sample_output_cnt}") . HTML::tag('pre', [], HTML::tag('code', [], $output_text));
}
return [
'type' => 'html',
'title' => $title,
'time_limit' => $time_limit,
'memory_limit' => $memory_limit,
'difficulty' => $difficulty,
'statement' => $statement_dom->innerHTML,
];
}
static function getCodeforcesProblemBasicInfo($id) {
$res = static::curl_get(static::getCodeforcesProblemUrl($id));
if (!$res) return null;
if (str_starts_with($res['content-type'], 'text/html')) {
return static::getCodeforcesProblemBasicInfoFromHtml($id, $res['response']);
} else if (str_starts_with($res['content-type'], 'application/pdf')) {
$title_prefix = str_starts_with($id, 'GYM') ? 'Gym' : 'CF';
$title_id = str_starts_with($id, 'GYM') ? substr($id, 3) : $id;
$title = "【{$title_prefix}{$title_id}】{$title_prefix}{$title_id}";
return [
'type' => 'pdf',
'title' => $title,
'time_limit' => null,
'memory_limit' => null,
'difficulty' => -1,
'pdf_data' => $res['response'],
'statement' => HTML::tag('h3', [], '提示') .
HTML::tag(
'p',
[],
'若无法正常加载 PDF，请' .
HTML::tag('a', ['href' => static::getCodeforcesProblemUrl($id), 'target' => '_blank'], '点此') .
'查看原题面。'
),
];
} else {
return null;
}
}
static function getAtcoderProblemBasicInfo($id) {
$res = static::curl_get(static::getAtcoderProblemUrl($id));
if (!$res) return null;
$dom = new \IvoPetkov\HTML5DOMDocument();
$dom->loadHTML($res);
$container_dom = $dom->querySelectorAll('#main-container > div.row > div.col-sm-12')->item(1);
if (!$container_dom) return null;
$title_dom = $container_dom->querySelector('span.h2');
$title = '【' . strtoupper($id) . '】' . preg_replace('/([A-Z][1-9]?) - (.*)/', '$2', explode("\n", trim($title_dom->textContent))[0]);
$limit_dom = $container_dom->querySelector('p');
$time_limit_matches = [];
preg_match('/Time Limit: (\d+)/', $limit_dom->textContent, $time_limit_matches);
$time_limit = intval($time_limit_matches[1]);
$memory_limit_matches = [];
preg_match('/Memory Limit: (\d+)/', $limit_dom->textContent, $memory_limit_matches);
$memory_limit = intval($memory_limit_matches[1]);
$statement_container_dom = $container_dom->querySelector('#task-statement');
$statement_dom = $statement_container_dom->querySelector('.lang-en');
if (!$statement_dom) {
$statement_dom = $statement_container_dom->querySelector('.lang-ja');
}
$statement_first_child = $statement_dom->querySelector('p');
$first_child_content = trim($statement_first_child->textContent);
if (str_starts_with($first_child_content, 'Score :') || str_starts_with($first_child_content, '配点 :')) {
$statement_dom->removeChild($statement_first_child);
}
foreach ($statement_dom->querySelectorAll('var') as &$elem) {
$html = $elem->innerHTML;
// => _{
$html = str_replace('', '_{', $html);
// => }
$html = str_replace('', '}', $html);
// => ^{
$html = str_replace('', '^{', $html);
// => }
$html = str_replace('', '}', $html);
$elem->innerHTML = $html;
}
$statement = $statement_dom->innerHTML;
// => $
$statement = str_replace('', '\\(', $statement);
// => $
$statement = str_replace('', '\\)', $statement);
return [
'type' => 'html',
'title' => $title,
'time_limit' => $time_limit,
'memory_limit' => $memory_limit,
'difficulty' => -1,
'statement' => $statement,
];
}
static function getUojProblemBasicInfo($id) {
$remote_provider = static::$providers['uoj'];
$res = static::curl_get(static::getUojProblemUrl($id));
if (!$res) return null;
$dom = new \IvoPetkov\HTML5DOMDocument();
$dom->loadHTML($res);
$title_dom = $dom->querySelector('.page-header');
$title_matches = [];
preg_match('/^#[1-9][0-9]*\. (.*)$/', trim($title_dom->textContent), $title_matches);
$title = "【{$remote_provider['short_name']}{$id}】{$title_matches[1]}";
$statement_dom = $dom->querySelector('.uoj-article');
$statement = HTML::tag('h3', [], '题目描述');
foreach ($statement_dom->querySelectorAll('a') as &$elem) {
$href = $elem->getAttribute('href');
$href = getAbsoluteUrl($href, $remote_provider['url']);
$elem->setAttribute('href', $href);
}
$statement .= $statement_dom->innerHTML;
return [
'type' => 'html',
'title' => $title,
'time_limit' => null,
'memory_limit' => null,
'difficulty' => -1,
'statement' => $statement,
];
}
static function getLojProblemBasicInfo($id) {
$remote_provider = static::$providers['loj'];
$curl = new Curl\Curl();
$curl->setUserAgent(static::USER_AGENT);
$curl->setHeader('Content-Type', 'application/json');
$res = retry_loop(function () use (&$curl, $id) {
$curl->post('https://api.loj.ac.cn/api/problem/getProblem', json_encode([
'displayId' => (int)$id,
'localizedContentsOfLocale' => 'zh_CN',
'samples' => true,
'judgeInfo' => true,
]));
if ($curl->error) {
return false;
}
return $curl->response;
});
if (!$res) return null;
// Convert stdClass to array
$res = json_decode(json_encode($res), true);
if (isset($res['error'])) return null;
$localized_contents = $res['localizedContentsOfLocale'];
$statement = '';
foreach ($localized_contents['contentSections'] as $section) {
$statement .= "\n###" . $section['sectionTitle'] . "\n\n";
if ($section['type'] === 'Text') {
$statement .= $section['text'] . "\n";
} else if ($section['type'] === 'Sample') {
// assert($res['samples'][$section['sampleId']]);
$display_sample_id = $section['sampleId'] + 1;
$sample = $res['samples'][$section['sampleId']];
$statement .= "\n#### 样例输入 #{$display_sample_id}\n\n";
$statement .= "\n```text\n{$sample['inputData']}\n```\n\n";
$statement .= "\n#### 样例输出 #{$display_sample_id}\n\n";
$statement .= "\n```text\n{$sample['outputData']}\n```\n\n";
if (trim($section['text'])) {
$statement .= "\n#### 样例解释 #{$display_sample_id}\n\n";
$statement .= $section['text'] . "\n";
}
} else {
// do nothing...
}
}
return [
'type' => 'html',
'title' => "【{$remote_provider['short_name']}{$id}】{$localized_contents['title']}",
'time_limit' => (float)$res['judgeInfo']['timeLimit'] / 1000.0,
'memory_limit' => $res['judgeInfo']['memoryLimit'],
'difficulty' => -1,
'statement' => HTML::parsedown()->text($statement),
];
}
static function getLuoguProblemBasicInfo($id) {
$remote_provider = static::$providers['luogu'];
$res = static::curl_get(static::getLuoguProblemUrl($id) . '?_contentOnly=1');
if (!$res) return null;
// Convert stdClass to array
$res = json_decode(json_encode($res['response']), true);
if (!isset($res['code']) || $res['code'] != 200) return null;
$problem = $res['currentData']['problem'];
$statement = '';
if ($problem['background']) {
$statement .= "\n### 题目背景\n\n";
$statement .= $problem['background'] . "\n";
}
$statement .= "\n### 题目描述\n\n";
$statement .= $problem['description'] . "\n";
$statement .= "\n### 输入格式\n\n";
$statement .= $problem['inputFormat'] . "\n";
$statement .= "\n### 输出格式\n\n";
$statement .= $problem['outputFormat'] . "\n";
$statement .= "\n### 输入输出样例\n\n";
foreach ($problem['samples'] as $id => $sample) {
$display_sample_id = $id + 1;
$statement .= "\n#### 样例输入 #{$display_sample_id}\n\n";
$statement .= "\n```text\n{$sample[0]}\n```\n\n";
$statement .= "\n#### 样例输出 #{$display_sample_id}\n\n";
$statement .= "\n```text\n{$sample[1]}\n```\n\n";
}
$statement .= "\n### 说明/提示\n\n";
$statement .= $problem['hint'] . "\n";
return [
'type' => 'html',
'title' => "【{$remote_provider['short_name']}{$problem['pid']}】{$problem['title']}",
'time_limit' => (float)max($problem['limits']['time']) / 1000.0,
'memory_limit' => (float)max($problem['limits']['memory']) / 1024.0,
'difficulty' => -1,
'statement' => HTML::parsedown()->text($statement),
];
}
public static function getSubmissionRequirements($oj) {
$remote_provider = UOJRemoteProblem::$providers[$oj];
if ($oj == 'luogu') {
return [
[
"name" => "luogu",
"type" => "remote submission",
]
];
}
return [
[
"name" => "answer",
"type" => "source code",
"file_name" => "answer.code",
"languages" => $remote_provider['languages'],
]
];
}
public static function getProblemRemoteUrl($oj, $id) {
if ($oj === 'codeforces') {
return static::getCodeforcesProblemUrl($id);
} else if ($oj === 'atcoder') {
return static::getAtcoderProblemUrl($id);
} else if ($oj === 'uoj') {
return static::getUojProblemUrl($id);
} else if ($oj === 'loj') {
return static::getLojProblemUrl($id);
} else if ($oj === 'luogu') {
return static::getLuoguProblemUrl($id);
}
return null;
}
// 传入 ID 需确保有效
public static function getProblemBasicInfo($oj, $id) {
if ($oj === 'codeforces') {
return static::getCodeforcesProblemBasicInfo($id);
} else if ($oj === 'atcoder') {
return static::getAtcoderProblemBasicInfo($id);
} else if ($oj === 'uoj') {
return static::getUojProblemBasicInfo($id);
} else if ($oj === 'loj') {
return static::getLojProblemBasicInfo($id);
} else if ($oj === 'luogu') {
return static::getLuoguProblemBasicInfo($id);
}
return null;
}
public static function downloadImagesInRemoteContent($problem_id) {
$curl = new Curl\Curl();
$curl->setUserAgent(static::USER_AGENT);
$curl->setRetry(5);
$problem = UOJProblem::query($problem_id);
if ($problem->info['type'] != 'remote') return;
$remote_provider = static::$providers[$problem->getExtraConfig('remote_online_judge')];
$remote_content = $problem->queryContent()['remote_content'];
$dom = new IvoPetkov\HTML5DOMDocument();
$dom->loadHTML($remote_content);
foreach ($dom->querySelectorAll('img') as &$elem) {
$src = $elem->getAttribute('src');
$url = getAbsoluteUrl($src, $remote_provider['url']);
$filename = 'remote_image_' . hash('md5', $url);
$curl->download($url, $problem->getResourcesPath($filename));
$elem->setAttribute('src', $problem->getResourcesUri($filename));
}
DB::update([
"update problems_contents",
"set", [
"remote_content" => HTML::purifier(['a' => ['target' => 'Enum#_blank']])->purify($dom->saveHTML()),
],
"where", [
"id" => $problem->info['id'],
],
]);
}
}