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原题链接：2696.Minimum string Length After Removing Substrings


题目难度：Easy


标签：字符串、栈、模拟


解析
思路梳理
比较鸡贼的一点
删除子串后，重新连接出的字符串可能会产生新的 &quot;AB&quot; 或 &quot;CD&quot; 子串。例如 &quot;FCACDB&quot; 中删除子串 &quot;CD&quot;，得到 &quot;FCAB&quot;，又有一个 &quot;AB&quot;，所以一轮显然删不干净，如果直接嗯模拟，一轮一轮的删那就慢了！另外字符串的删字符拼接很麻烦的，空间的开销又多了。
栈！
注意到每删去一个符合题意子串，“连接” 出来的字符串新产生的 &quot;AB&quot; 或 &quot;CD&quot; 子串一定是在删除的原位置上生成的，跟建立后缀表达式 ==匹配算符== 的思路套上了，字符串逐字符挨个入栈具体演示一下的话：


F,C,A,C 作为待入栈字符没有与栈顶的字符匹配，正常入栈


栈为 [F, C, A, C] ，栈顶为 C，此时待入栈字符为 ...</div></div></div><div class="recent-post-item"><div class="recent-post-info no-cover"><a class="article-title" href="/mypage1637/2024/01/10/My-First-Blog-For-Personal-Page/" title="My First Blog For Personal Page">My First Blog For Personal Page</a><div class="article-meta-wrap"><span class="post-meta-date"><i class="far fa-calendar-alt"></i><span class="article-meta-label">发表于</span><time datetime="2024-01-10T07:49:04.000Z" title="发表于 2024-01-10 15:49:04">2024-01-10</time></span><span class="article-meta"><span class="article-meta-separator">|</span><i class="fas fa-inbox"></i><a class="article-meta__categories" href="/mypage1637/categories/%E9%9A%8F%E7%AC%94%E6%9D%82%E8%B0%88/">随笔杂谈</a></span></div><div class="content">纪念性质：我个人主页的第一篇博文
技术介绍
（注：随着网站的维护更新，新加入的技术使用会进行更新，例如后续加入的评论模块）
个人主页基于静态网站生成工具 Hexo 搭配主题 Butterfly 于 Gitee Page 部署，使用 Markdown 完成文章编写。使用 Visual Studio Code 和 npm 进行项目及相关依赖管理。
更新内容
包括但不限于：

基于个人实际使用经历的 Coding 技术总结
编程题刷题记录
个人认为需要在个人主页更新的杂谈随笔(and 日记)
……

关于第三点，确实是有写纸质日记的习惯，但是绝大多数篇幅大概是不方便放上个人主页的（确信）
About 我写的小说


一般来讲不会把正文放个人主页，Markdown 再搬一遍多此一举了属于是


会放一些 Q&amp;A 问答访谈以及创作感悟，未来如果有合适的技术应用（例如 Bookdown），可能会象征性地搞一搞


~~如果有一天有能力把一些插画イラスト啥的放上去最好了 ~~


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