烤漆，摸了。

• 交互题+思维 F题
• 博弈论 F题
• 期望+dp F题

• 闵可夫斯基和

• 2020.06.20 Codeforces Global Round 8 Virtual participation
• 2020.06.22 Codeforces Round #651 (Div. 2) Virtual participation
• 2020.06.23 Codeforces Round #652 (Div. 2)
• 2020.06.25 Educational Codeforces Round 78 (Rated for Div. 2) Virtual participation
• 2020.06.26 Educational Codeforces Round 90 (Rated for Div. 2) Virtual participation

• 矩阵树定理