

 <!--
============================================================================
 本网站使用了以下开源项目，特此致谢并遵循其许可证要求。
============================================================================

1. SYZOJ 项目 (原始上游代码)
   - 项目地址: https://github.com/syzoj/syzoj
   - 版权持有人: Menci
   - 许可证: MIT License
   - 完整许可证文本如下：

MIT License

Copyright (c) 2021 Menci

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.

============================================================================

2. AlgoBeatOnlineJudge 项目，工单系统的一部分等(基于 SYZOJ 的修改和新增部分)
   - 项目地址: https://github.com/ZemuZzz/AlgoBeatOnlineJudge
   - 版权持有人: 请参考该项目仓库 (https://github.com/ZemuZzz/AlgoBeatOnlineJudge)
   - 许可证: Apache License 2.0
   - 完整许可证文本如下：

                                 Apache License
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				    updateNotificationCount();
				    loadForceNotifications();
				    setInterval(updateUnreadCount, 30000);
				    setInterval(updateNotificationCount, 30000);
				});
				
				// ========== 深色/浅色模式核心管理器（基于旧版 + 统一子主题） ==========
				(function() {
				    const COOKIE_KEY = 'theme_mode';
				    const STORAGE_KEYS = {
				        dark_sub: 'dark_sub_theme',
				        light_sub: 'light_sub_theme'
				    };
				    const DARK_SUB_THEMES = ['warm', 'mint', 'deep', 'oled', 'purple'];  // 与 CSS 中 class 对应
				    const LIGHT_SUB_THEMES = ['ng','warm', 'mint', 'oled', 'purple'];         // 亮色主题变体（暂时只有这些）
				
				    const icons = { light: { cls: 'sun' }, dark: { cls: 'moon' }, auto: { cls: 'adjust' } };
				    // 判断当前应该使用深色模式（true）还是浅色模式（false）
				    function shouldUseDarkMode() {
				        const mode = window.__themeMode || 'auto';
				        if (mode === 'dark') return true;
				        if (mode === 'light') return false;
				        // auto 模式：根据系统偏好
				        return window.matchMedia('(prefers-color-scheme: dark)').matches;
				    }
				    function getCurrentColorMode() {
				        return shouldUseDarkMode() ? 'dark' : 'light';
				    }
				    function setThemeMode(mode, updateCookie = true) {
				        if (updateCookie) {
				            document.cookie = COOKIE_KEY + '=' + mode + '; path=/; max-age=31536000';
				        }
				        window.__themeMode = mode;
				    }
				    function isSystemDark() {
				        return window.matchMedia('(prefers-color-scheme: dark)').matches;
				    }
				    function applyThemeClass(ss) {
				        let mode = getCurrentColorMode();
				        console.log(mode)
				        const htmlElem = document.documentElement;
				        if (mode == "dark") {
				            setDarkSubTheme(getDarkSubTheme());
				        } else {
				        console.log("applyThemeClass",localStorage,getLightSubTheme())
				            setLightSubTheme(getLightSubTheme());
				        }
				        return mode;
				    }
				    function refreshTheme(mode) {
				        const finalMode = shouldUseDarkMode();
				        if (mode) setThemeMode(mode, true);
				        applyThemeClass(finalMode);
				    }
				
				    // ----- 深色子主题管理 -----
				    function getDarkSubTheme() {
				        return localStorage.getItem(STORAGE_KEYS.dark_sub)==undefined ? 'default':localStorage.getItem(STORAGE_KEYS.dark_sub);
				    }
				    function setDarkSubTheme(themeName) {
				        console.log("setdark",themeName)
				        const html = document.documentElement;
				        DARK_SUB_THEMES.forEach(t => html.classList.remove(`dark-${t}`));
				        LIGHT_SUB_THEMES.forEach(t => html.classList.remove(`light-${t}`));
				        html.classList.add(`theme`);
				        html.classList.add(`dark`);
				        if (themeName !== 'default') {
				            html.classList.add(`dark-${themeName}`);
				        }
				        localStorage.setItem(STORAGE_KEYS.dark_sub, themeName);
				    }
				    // ----- 亮色子主题管理 -----
				    function getLightSubTheme() {
				    console.log(localStorage.getItem(STORAGE_KEYS.light_sub))
				        return localStorage.getItem(STORAGE_KEYS.light_sub)==undefined ? 'ng':localStorage.getItem(STORAGE_KEYS.light_sub);
				    }
				    function setLightSubTheme(themeName) {
				        console.log("setlight",`light-${themeName}`)
				        const html = document.documentElement;
				        DARK_SUB_THEMES.forEach(t => html.classList.remove(`dark-${t}`));
				        LIGHT_SUB_THEMES.forEach(t => html.classList.remove(`light-${t}`));
				        html.classList.remove(`dark`);
				        if (themeName !== 'default') {
				            html.classList.add(`theme`);
				            html.classList.add(`light-${themeName}`);
				        }
				        else html.classList.remove(`theme`);
				        localStorage.setItem(STORAGE_KEYS.light_sub, themeName);
				        console.log(localStorage)
				    }
				
				    // 切换子主题（供菜单调用）
				    window.switchSubTheme = function(themeName) {
				    console.log("sub",themeName)
				        const isDark = getCurrentColorMode() == 'dark';
				        if (isDark) {
				            setDarkSubTheme(themeName);
				        } else {
				            setLightSubTheme(themeName);
				        }
				        Swal.fire({
				            toast: true,
				            icon: 'success',
				            title: '主题已切换',
				            timer: 1500,
				            theme: window.__themeMode,
				            showConfirmButton: false,
				            position: 'top-end'
				        });
				    };
				
				    // ----- 动态填充统一下拉菜单（根据当前模式显示不同的主题列表）-----
				    function populateThemeMenu() {
				    console.log(-1)
				        const $menu = $('#theme-subtheme-menu');
				        if (!$menu.length) return;
				        const isDark = getCurrentColorMode() == 'dark';
				        // 定义主题列表（显示名称、图标、对应的 theme id）
				        let themes;
				        if (isDark) {
				            themes = [
				                { id: 'default', name: '暗蓝', icon: 'moon' },
				                { id: 'warm',    name: '暖橙',     icon: 'fire' },
				                { id: 'mint',    name: '墨绿',     icon: 'leaf' },
				                { id: 'deep',    name: '深邃',     icon: 'magic' },
				                { id: 'oled',    name: 'OLED黑',   icon: 'adjust' },
				                { id: 'purple',  name: '紫罗兰',   icon: 'star' }
				            ];
				        } else {
				            themes = [
				            	{ id: 'default', name: '原生', icon: 'sun' },

				                { id: 'ng', name: '新版', icon: 'rocket' },
				                { id: 'warm',    name: '暖橙',     icon: 'fire' },
				                { id: 'mint',    name: '薄荷',     icon: 'leaf' },
				                { id: 'oled',    name: '高亮白',   icon: 'adjust' },
				                { id: 'purple',  name: '紫罗兰',   icon: 'star' }
				            ];
				        }
				        let html = '';
				        themes.forEach(t => {
				            html += `<div class="item" data-theme="${t.id}">
				                        <i class="${t.icon} icon"></i> ${t.name}</div>`;
				        });
				        $menu.html(html);
				    }
				
				    // 初始化下拉菜单（使用 Semantic UI dropdown 并绑定事件）
				    function initThemeDropdown() {
				        const $dropdown = $('#theme-subtheme-dropdown');
				        if (!$dropdown.length) return;
				        // 每次打开前重新填充菜单，确保与当前模式同步
				        $('#theme-subtheme-dropdown').dropdown({
				            direction: 'downward',
				            on: 'click',          // 强制 click 触发（移动端默认就是 click）
				            // 可选：添加触摸优化
				            touch: true,
				            onShow: function() {
				                populateThemeMenu();
				            }
				        });
				        $('#theme-subtheme-dropdown').dropdown({
				            direction: 'downward',
				            on: 'hover',          // 强制 click 触发（移动端默认就是 click）
				            // 可选：添加触摸优化
				            touch: true,
				            onShow: function() {
				                populateThemeMenu();
				            }
				        });
				        // 菜单项点击事件（委托）
				        $(document).on('click', '#theme-subtheme-menu .item', function(e) {
				            e.preventDefault();
				            console.log("hd")
				            const theme = $(this).data('theme');
				            console.log(theme)
				            window.switchSubTheme(theme);
				        });
				        // 首次填充
				        populateThemeMenu();
				    }
				
				    // ----- 监听系统深色模式变化（仅 auto 模式）-----
				    const systemDarkMq = window.matchMedia('(prefers-color-scheme: dark)');
				    function onSystemChange(e) {
				        const currentMode = window.__themeMode;
				        if (currentMode === 'auto') {
				            applyThemeClass('auto');
				        }
				    }
				    if (systemDarkMq.addEventListener) {
				        systemDarkMq.addEventListener('change', onSystemChange);
				    } else if (systemDarkMq.addListener) {
				        systemDarkMq.addListener(onSystemChange);
				    }
				
				    // 绑定主题切换按钮 (light/dark/auto 循环)
				    function initButtonIcon() {
				        var mode = window.__themeMode;
				        var btn = document.getElementById('theme-toggle');
				        if (!btn) return;
				        var iconDef = icons[mode] || icons.light;
				        btn.innerHTML = '<i class="' + iconDef.cls + ' icon" style="margin: 0;"></i>';
				    }
				    function bindThemeToggle() {
				        const toggleBtn = document.getElementById('theme-toggle');
				        if (!toggleBtn) return;
				        toggleBtn.addEventListener('click', function(e) {
				            e.preventDefault();
				            let mode = window.__themeMode;
				            if (mode === 'light') mode = 'dark';
				            else if (mode === 'dark') mode = 'auto';
				            else mode = 'light';
				            refreshTheme(mode);
				            initButtonIcon(mode)
				            // 刷新后，下拉菜单内容会随着 populateThemeMenu 更新（下一次打开时）
				        });
				    }
				
				    // 页面加载完成后初始化
				    $(document).ready(function() {
				        // 初始化深色/浅色模式
				        initButtonIcon();
				        bindThemeToggle();
				        // 初始化统一主题下拉菜单
				        initThemeDropdown();
				        // 监听 class 变化，当深色模式被外部修改时（如通过其他方式），重新应用子主题并刷新菜单
				        const observer = new MutationObserver(function(mutations) {
				            mutations.forEach(function(mutation) {
				                if (mutation.attributeName === 'class') {
				                    const html = document.documentElement;
				                    const isDarkNow = html.classList.contains('theme');
				                    if (isDarkNow !== window._wasDark) {
				                        window._wasDark = isDarkNow;
				                        populateThemeMenu();
				                    }
				                }
				            });
				        });
				        observer.observe(document.documentElement, { attributes: true });
				        window._wasDark = document.documentElement.classList.contains('theme');
				    });
				})();
			</script>

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            <div class="description">
              ### 解题思路  签字笔单价是 $1$ 元 $9$ 角，也就是 $19$ 角。小玉的总钱数是 $a$ 元 $b$ 角，换算成角就是 $a \times 10 + b$ 角。  要计算最多能买多少只签字笔，用总角数除以单价 $19$ 角即可，整除部分就是答案。  **潜在问题**： -...
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            <span class="right floated"><i class="clock icon"></i> 2026-05-08 13:17:51</span>
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