2021-08-10
CF题解
Codeforces Round #737 (Div. 2)
2021-08-05
CF题解
Educational Codeforces Round 112 (Rated for Div. 2)
2021-08-04
知识总结
Some arrangement of division and congruence theory in elementary number theory.
2021-08-04
番外集合
Who am I? Where am I? What am I doing?
