摘要: 题意: 最低等级$level\ 1$,已知在$level\ i$操作一次需花费$a_i$,有概率$p_i$升级到$level\ i+1$,有$1 p_i$掉级到$x_i(x_i include include include include include include include inclu 阅读全文
posted @ 2019-08-12 19:37 KirinSB 阅读(227) 评论(0) 推荐(0) 编辑