11·212022题解2022.11.21Codeforces 1761 - Pinely Round 1 (Div. 1 + Div. 2)Codeforces 1761 - Pinely Round 1 (Div. 1 + Div. 2)约 10 分钟亲笔#比赛回顾#组合数学图片加载失败