2020

12-30 / 【NowCoder10662F】Gcd Product
12-29 / 圆的反演
09-20 / [HDU6439]Congruence equation
09-16 / Educational Codeforces Round 95
09-13 / Codeforces Round #668 (Div. 1)
09-13 / Codeforces Round #670 (Div. 2)
09-13 / [hihocoder1783] Another Duplicate Counting
08-20 / Codeforces Round #662 (Div. 2)
08-19 / 多项式及其求和
08-16 / Educational Codeforces Round 93