======= 2020//-2020//周报 ======= ====== 团队训练 ====== 本周无团队训练 ====== 李元恺 ====== ===== 专题 ===== 没有专题 ===== 比赛 ===== Educational Codeforces Round 89 (Rated for Div. 2): ''pro:5/7'' ===== 题目 ===== ====== 姜维翰 ====== ===== 专题 ===== 没有专题 ===== 比赛 ===== 没有比赛 ===== 题目 ===== ====== 袁熙 ====== ===== 专题 ===== 没有专题 ===== 比赛 ===== 没有比赛 ===== 题目 ===== ====== 本周推荐 ====== ===== 李元恺 ===== 推荐一道质数性质的小题[[https://codeforces.com/contest/1366/problem/D|链接]] ===== 姜维翰 ===== ===== 袁熙 =====