S2OJ/web/app/models/UOJProblem.php

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<?php
// this class depends on getUOJConf from uoj-judger-lib.php sometimes
// be sure to include the lib
// TODO: move getUOJConf into a static class independent of uoj-judger-lib.php
class UOJProblem {
use UOJDataTrait;
use UOJArticleTrait;
public static array $difficulty = [
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800,
1000,
1200,
1400,
1600,
1800,
1900,
2000,
2100,
2200,
2300,
2400,
2500,
2600,
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2700,
2900,
3100,
3300,
3500,
];
public static array $difficulty_color = [
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800 => '#008000',
1000 => '#008000',
1200 => '#00c0c0',
1400 => '#00c0c0',
1600 => '#0000ff',
1800 => '#0000ff',
1900 => '#0000ff',
2000 => '#aa00aa',
2100 => '#aa00aa',
2200 => '#aa00aa',
2300 => '#ff8000',
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2400 => '#ff8000',
2500 => '#ff8000',
2600 => '#ff0000',
2700 => '#ff0000',
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2900 => '#ff0000',
3100 => '#aa0000',
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3300 => '#aa0000',
3500 => '#aa0000',
];
public static array $categories = [
'算法基础' => [
'暴力',
'枚举',
'模拟',
'递归与分治',
'贪心',
'排序',
'前缀和与差分',
'二分',
'倍增',
'构造',
'打表',
],
'搜索' => [
'深度优先搜索',
'广度优先搜索',
'双向搜索',
'启发式搜索',
'A*',
'IDA*',
'迭代加深',
'回溯法',
'Dancing Links',
],
'动态规划' => [
'记忆化搜索',
'线性 DP',
'背包 DP',
'区间 DP',
'树形 DP',
'状压 DP',
'数位 DP',
'DAG 上 DP',
'插头 DP',
'概率 DP',
'单调队列优化 DP',
'斜率优化 DP',
'四边形不等式优化 DP',
],
'计算几何' => [
'Pick 定理',
'三角剖分',
'凸包',
'扫描线',
'旋转卡壳',
'半平面交',
'平面最近点对',
'随机增量法',
'反演变换',
],
'数学' => [
'位运算',
'快速幂',
'高精度',
'生成函数',
'指数生成函数',
'向量',
'矩阵',
'高斯消元',
'线性基',
'线性规划',
'容斥',
'组合计数',
'离散对数',
'单纯形算法',
'概率',
'置换群',
'斐波那契数列',
'牛顿迭代法',
'数值积分',
'分块打表',
],
'数论' => [
'最大公约数',
'分解质因数',
'欧拉函数',
'筛法',
'欧拉定理',
'费马小定理',
'类欧几里得算法',
'翡蜀定理',
'乘法逆元',
'线性同余方程',
'Meissel-Lehmer 算法',
'二次剩余',
'BSGS',
'原根',
'卢卡斯定理',
'莫比乌斯反演',
'拉格朗日反演',
'杜教筛',
'Powerful Number 筛',
'Min_25 筛',
'洲阁筛',
'连分数',
'Stern-Brocot 数与 Farey 序列',
'Pell 方程',
],
'字符串' => [
'字符串哈希',
'字典树',
'KMP',
'Boyer-Moore',
'Z 函数(扩展 KMP',
'AC 自动机',
'后缀数组',
'后缀自动机',
'后缀平衡树',
'广义后缀自动机',
'Manacher',
'回文树',
'序列自动机',
'最小表示法',
'Lyndon 分解',
],
'图论' => [
'拓扑排序',
'最短路',
'K 短路',
'同余最短路',
'虚树',
'树分治',
'动态树分治',
'树哈希',
'树上启发式合并',
'AHU 算法',
'矩阵树定理',
'最小生成树',
'最小树形图',
'最小直径生成树',
'斯坦纳树',
'拆点',
'差分约束',
'强连通分量',
'双连通分量',
'割点与桥',
'圆方树',
'2-SAT',
'欧拉图',
'哈密顿图',
'最小环',
'平面图',
'网络流',
'最大流',
'最小割',
'费用流',
'上下界网络流',
'Stoer-Wagner 算法',
'二分图',
'二分图最大匹配',
'二分图最大权匹配',
'一般图最大匹配',
'一般图最大权匹配',
'Prufer 序列',
'LGV 引理',
'弦图',
],
'组合数学' => [
'排列组合',
'卡特兰数',
'斯特林数',
'贝尔数',
'伯努利数',
'康托展开',
'容斥原理',
'抽屉原理',
'欧拉数',
],
'数据结构' => [
'栈',
'队列',
'链表',
'哈希表',
'并查集',
'二叉堆',
'配对堆',
'树状数组',
'线段树',
'平衡树',
'左偏树',
'块状数组',
'块状链表',
'树分块',
'Sqrt Tree',
'可持久化数据结构',
'单调栈',
'单调队列',
'ST 表',
'树套树',
'李超线段树',
'区间最值操作与区间历史最值',
'划分树',
'跳表',
'K-D Tree',
'珂朵莉树',
'动态树',
'析合树',
],
'多项式' => [
'拉格朗日插值',
'快速傅里叶变换',
'快速数论变换',
'快速沃尔什变换',
'多项式求逆',
'多项式开方',
'多项式除法与取模',
'多项式对数函数与指数函数',
'多项式牛顿迭代',
'多项式多点求值与快速插值',
'多项式三角函数',
'多项式反三角函数',
'常系数齐次线性递推',
],
'博弈论' => [
'不平等博弈',
'SG 函数',
'Nim 游戏',
'Anti-Nim',
'纳什均衡',
],
'杂项' => [
'构造',
'离散化',
'CDQ 分治',
'整体二分',
'分块',
'莫队',
'分数规划',
'随机化',
'模拟退火',
'爬山法',
'悬线法',
'编译原理',
'复杂度分析',
'语义分析',
'底层优化',
],
];
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public static function query($id) {
if (!isset($id) || !validateUInt($id)) {
return null;
}
$info = DB::selectFirst([
"select * from problems",
"where", ['id' => $id]
]);
if (!$info) {
return null;
}
return new UOJProblem($info);
}
public static function upgradeToContestProblem() {
return (new UOJContestProblem(self::cur()->info, UOJContest::cur()))->setAsCur()->valid();
}
public static function userCanManageSomeProblem(array $user = null) {
if (!$user) {
return false;
}
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if (isSuperUser($user) || UOJUser::checkPermission($user, 'problems.manage')) {
return true;
}
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return DB::selectFirst([
DB::lc(), "select 1 from problems_permissions",
"where", [
'username' => $user['username']
], DB::limit(1)
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]) != null || DB::selectFirst([
DB::lc(), "select 1 from problems",
"where", [
"uploader" => $user['username'],
], DB::limit(1),
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]) != null;
}
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public static function userCanCreateProblem(array $user = null) {
if (!$user) {
return false;
}
return isSuperUser($user) || UOJUser::checkPermission($user, 'problems.create');
}
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public function __construct($info) {
$this->info = $info;
}
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public function type() {
return $this->info['type'];
}
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public function getTitle(array $cfg = []) {
$cfg += [
'with' => 'id',
'simplify' => false
];
$title = $this->info['title'];
if ($cfg['simplify']) {
$title = trim($title);
$title = mb_ereg_replace('^(\[[^\]]*\]|【[^】]*】)', '', $title);
$title = trim($title);
}
if ($cfg['with'] == 'id') {
return "#{$this->info['id']}. {$title}";
} else {
return $title;
}
}
public function getUri($where = '') {
return "/problem/{$this->info['id']}{$where}";
}
public function getLink(array $cfg = []) {
return HTML::link($this->getUri(), $this->getTitle($cfg), ['escape' => false]);
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}
public function getAttachmentUri() {
return '/download/problem/' . $this->info['id'] . '/attachment.zip';
}
public function getMainDataUri() {
return '/download/problem/' . $this->info['id'] . '/data.zip';
}
public function getUploaderLink() {
return UOJUser::getLink($this->info['uploader'] ?: "root");
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}
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public function getProviderLink() {
if ($this->type() == 'local') {
return HTML::tag('a', ['href' => HTML::url('/')], UOJConfig::$data['profile']['oj-name-short']);
}
$remote_oj = $this->getExtraConfig('remote_online_judge');
$remote_id = $this->getExtraConfig('remote_problem_id');
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if (!$remote_oj || !array_key_exists($remote_oj, UOJRemoteProblem::$providers)) {
return 'Error';
}
$provider = UOJRemoteProblem::$providers[$remote_oj];
return HTML::tag('a', [
'href' => UOJRemoteProblem::getProblemRemoteUrl($remote_oj, $remote_id),
'target' => '_blank'
], $provider['name']);
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}
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public function getDifficultyHTML() {
$difficulty = (int)$this->info['difficulty'];
$difficulty_text = in_array($difficulty, static::$difficulty) ? $difficulty : '?';
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$difficulty_color = in_array($difficulty, static::$difficulty) ? static::$difficulty_color[$difficulty] : '#7e7e7e';
return HTML::tag('span', ['class' => 'uoj-difficulty', 'style' => "color: $difficulty_color"], $difficulty_text);
}
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public function findInContests() {
$res = DB::selectAll([
"select contest_id from contests_problems",
"where", ['problem_id' => $this->info['id']]
]);
$cps = [];
foreach ($res as $row) {
$cp = new UOJContestProblem($this->info, UOJContest::query($row['contest_id']));
if ($cp->valid()) {
$cps[] = $cp;
}
}
return $cps;
}
public function userCanClickZan(array $user = null) {
if ($this->userCanView($user)) {
return true;
}
foreach ($this->findInContests() as $cp) {
if ($cp->userCanClickZan($user)) {
return true;
}
}
return false;
}
public function getZanBlock() {
return ClickZans::getBlock('P', $this->info['id'], $this->info['zan']);
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}
public function getSubmissionRequirement() {
return json_decode($this->info['submission_requirement'], true);
}
public function getExtraConfig($key = null) {
$extra_config = json_decode($this->info['extra_config'], true);
$extra_config += [
'view_content_type' => 'ALL',
'view_all_details_type' => 'ALL',
'view_details_type' => 'ALL',
'view_solution_type' => 'ALL',
'submit_solution_type' => 'ALL_AFTER_AC',
'need_to_review_hack' => false,
'add_hack_as' => 'ex_test',
];
return $key === null ? $extra_config : $extra_config[$key];
}
public function getCustomTestRequirement() {
$extra_config = json_decode($this->info['extra_config'], true);
if (isset($extra_config['custom_test_requirement'])) {
return $extra_config['custom_test_requirement'];
} else {
$answer = [
'name' => 'answer',
'type' => 'source code',
'file_name' => 'answer.code'
];
foreach ($this->getSubmissionRequirement() as $req) {
if ($req['name'] == 'answer' && $req['type'] == 'source code' && isset($req['languages'])) {
$answer['languages'] = $req['languages'];
}
}
return [
$answer, [
'name' => 'input',
'type' => 'text',
'file_name' => 'input.txt'
]
];
}
}
public function userCanView(array $user = null, array $cfg = []) {
$cfg += ['ensure' => false];
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if ($this->info['is_hidden'] && !$this->userCanManage($user)) {
$cfg['ensure'] && UOJResponse::page404();
return false;
}
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if (!UOJUser::checkPermission($user, 'problems.view')) {
$cfg['ensure'] && UOJResponse::page403();
return false;
}
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return true;
}
/**
* Get a SQL cause to determine whether a user can view a problem
* Need to be consistent with the member function userCanView
*/
public static function sqlForUserCanView(array $user = null) {
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if (isSuperUser($user) || UOJUser::checkPermission($user, 'problems.manage')) {
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return "(1)";
} elseif (UOJProblem::userCanManageSomeProblem($user)) {
return DB::lor([
"problems.is_hidden" => false,
DB::land([
"problems.is_hidden" => true,
DB::lor([
[
"problems.id", "in", DB::rawbracket([
"select problem_id from problems_permissions",
"where", ["username" => $user['username']]
])
],
[
"problems.id", "in", DB::rawbracket([
"select problem_id from problems",
"where", ["uploader" => $user['username']]
])
],
])
])
]);
} else {
return "(problems.is_hidden = false)";
}
}
public function isUserOwnProblem(array $user = null) {
if (!$user) {
return false;
}
return $user['username'] === $this->info['uploader'];
}
public function userPermissionCodeCheck(array $user = null, $perm_code) {
switch ($perm_code) {
case 'ALL':
return true;
case 'ALL_AFTER_AC':
return $this->userHasAC($user);
case 'NONE':
return false;
default:
return null;
}
}
public function userCanUploadSubmissionViaZip(array $user = null) {
foreach ($this->getSubmissionRequirement() as $req) {
if ($req['type'] == 'source code') {
return false;
}
}
return true;
}
public function userCanDownloadAttachments(array $user = null) {
if ($this->userCanView($user)) {
return true;
}
foreach ($this->findInContests() as $cp) {
if ($cp->userCanDownloadAttachments($user)) {
return true;
}
}
return false;
}
public function userCanManage(array $user = null) {
if (!$user) {
return false;
}
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if (isSuperUser($user) || $this->isUserOwnProblem($user) || UOJUser::checkPermission($user, 'problems.manage')) {
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return true;
}
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return DB::selectFirst([
DB::lc(), "select 1 from problems_permissions",
"where", [
'username' => $user['username'],
'problem_id' => $this->info['id']
]
]) != null;
}
public function userCanDownloadTestData(array $user = null) {
if ($this->userCanManage($user)) {
return true;
}
if (!UOJUser::checkPermission($user, 'problems.download_testdata')) {
return false;
}
foreach ($this->findInContests() as $cp) {
if ($cp->contest->userHasRegistered($user) && $cp->contest->progress() == CONTEST_IN_PROGRESS) {
return false;
}
}
return true;
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}
public function preHackCheck(array $user = null) {
return $this->info['hackable'] && (!$user || $this->userCanView($user));
}
public function needToReviewHack() {
return $this->getExtraConfig('need_to_review_hack');
}
public function userHasAC(array $user = null) {
if (!$user) {
return false;
}
return DB::selectFirst([
DB::lc(), "select 1 from best_ac_submissions",
"where", [
'submitter' => $user['username'],
'problem_id' => $this->info['id']
]
]) != null;
}
public function preSubmitCheck() {
return true;
}
public function additionalSubmissionComponentsCannotBeSeenByUser(array $user = null, UOJSubmission $submission) {
foreach ($this->findInContests() as $cp) {
if ($cp->contest->userHasRegistered($user) && $cp->contest->progress() == CONTEST_IN_PROGRESS) {
if ($submission->userIsSubmitter($user)) {
if ($cp->contest->getJudgeTypeInContest() == 'no-details') {
return ['low_level_details'];
} else {
return [];
}
} else {
return ['content', 'high_level_details', 'low_level_details'];
}
}
}
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return [];
}
public function getDataFolderPath() {
return "/var/uoj_data/{$this->info['id']}";
}
public function getDataZipPath() {
return "/var/uoj_data/{$this->info['id']}.zip";
}
public function getDataFilePath($name = '') {
// return "zip://{$this->getDataZipPath()}#{$this->info['id']}/$name";
return "{$this->getDataFolderPath()}/$name";
}
public function getProblemConfArray(string $where = 'data') {
if ($where === 'data') {
return getUOJConf($this->getDataFilePath('problem.conf'));
} else {
return null;
}
}
public function getProblemConf(string $where = 'data') {
if ($where === 'data') {
return UOJProblemConf::getFromFile($this->getDataFilePath('problem.conf'));
} else {
return null;
}
}
public function getNonTraditionalJudgeType() {
$conf = $this->getProblemConf();
if (!($conf instanceof UOJProblemConf)) {
return false;
}
return $conf->getNonTraditionalJudgeType();
}
}
UOJProblem::$table_for_content = 'problems_contents';
UOJProblem::$key_for_content = 'id';
UOJProblem::$fields_for_content = ['*'];
UOJProblem::$table_for_tags = 'problems_tags';
UOJProblem::$key_for_tags = 'problem_id';