Codeforces - Problem Set - ZXOJ

	ID	Problem Show tags Hide tags	AC / Tried	Difficulty
	189	P189 「一本通 5.6 例 4」Cats Transport DP 斜率优化 Codeforces	0 / 0	(None)
	203	P203 「一本通 6.2 练习 4」Sherlock and His Girlfriend 数论 Codeforces 埃氏筛及欧拉筛	0 / 0	(None)

Pick a problem randomly based on the current filter.