许可证和声明

检查器

MIT 许可证：

MIT License

Copyright (c) 2026 Problem Forge, LLC

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

本站自己的代码

Copyright (C) 2026 Problem Forge, LLC。保留所有权利。本站发送的 JavaScript 和 CSS 只是提供给浏览器使用，不授予任何许可，检查器（见上）除外。

题目文件和答案

本站发出的文件（你自己的副本、访客样题、悬赏题目文件）以及发出的答案，按照 CC0 1.0 Universal 贡献到公有领域。可用于任何用途；不需要署名。

第三方组件

服务器上：GNU C++ 标准库（GPL-3.0，附 GCC Runtime Library Exception）、Boost（Boost Software License 1.0：Asio、Beast、JSON）、OpenSSL 3（Apache-2.0）、SQLite（公有领域）、ICU（Unicode License V3）和 zlib（zlib License）。Linux 检查器二进制文件静态链接 GNU C++ 库，适用同一例外条款。不会向浏览器发送任何第三方代码。

标志

一个铁砧，由 Gerald G 绘制（Openclipart），取自 Wikimedia Commons 上的“Anvil, labelled en.svg”（标注由 Andy Dingley 添加，这里已去掉；已裁剪）。按照 CC0 1.0 Universal 贡献到公有领域。