验题人个人题解，写了除数论外的十二题。本文中不会讲述前置知识，默认大家都会，并且不会写详细的思考过程，请大家多多思考。 按个人体感难度顺序递增。 K 签到1  前置知识点：模拟  简单模拟 略 代码链接:https://ac.nowcoder.com/acm/contest/view-submission?submissionId=76202082 L 签到2  前置知识点：stl  stl模拟 略 代码链接:https://ac.nowcoder.com/acm/contest/view-submission?submissionId=76202091 E 传送门  前置知识点:bfs/di...