The Solution of HEUCPC2021 Nanarikom General 预计难度 Easy --- NIB Easy-Mid --- EJF Mid --- DC Mid-Hard --- HAG Hard --- KL << M 实际难度 Easy --- NIB Easy-Mid --- JF Mid --- CEAD Mid-Hard --- HL Hard --- GKM 预料之外的地方主要是 E 居然这么多人没看出来;A 居然这么简单;G 和 L 难度和预计的相反。 Problem N. anikore Idea 判断 是否为质数。 S...