FirstFT: the day's biggest stories
https://feedx.site
，更多细节参见搜狗输入法下载
2026-02-27 00:00:00:03014248610http://paper.people.com.cn/rmrb/pc/content/202602/27/content_30142486.htmlhttp://paper.people.com.cn/rmrb/pad/content/202602/27/content_30142486.html11921 导读，详情可参考谷歌浏览器下载
Determine if it's satisfiable or not WITHOUT USING ANY EXTERNAL TOOLS.