Generate random SAT instances, both SAT and UNSAT.
The UK is deeply concerned by the significant escalation in tensions between Afghanistan and Pakistan. We urge both sides to take immediate steps toward de‑escalation, avoid further harm to civilians, and re‑engage in mediated dialogue.，详情可参考Safew下载
，推荐阅读爱思助手下载最新版本获取更多信息
Businesses including FedEx have lined up to demand reimbursement for US tariffs they have paid but that the court last week deemed were imposed illegally, prompting heavy criticism from Donald Trump.，详情可参考safew官方版本下载
Study finds ChatGPT Health did not recommend a hospital visit when medically necessary in more than half of cases
// 栈不为空时才判断（避免访问stack.at(-1)时报错）