Problem Set - 2009

ID	Problem Show tags Hide tags	AC / Tried	Difficulty
1800	P1800 潜伏者 NOIP 提高组 2009	0 / 0	(None)
1801	P1801 Hankson 的趣味题 NOIP 提高组 2009	0 / 0	(None)
1802	P1802 最优贸易 NOIP 提高组 2009	0 / 0	(None)
1803	P1803 靶形数独 NOIP 提高组 2009	0 / 0	(None)

Pick a problem randomly based on the current filter.

Categories