Codeforces - Problem Set

	ID	Problem Show tags Hide tags	AC / Tried	Difficulty
	678	P1669 「一本通 5.6 例 4」Cats Transport DP 斜率优化 Codeforces	0 / 0	(None)
	692	P1683 「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)

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