	ID	题目显示标签隐藏标签	AC / 尝试	难度
	4488	P639C Bear and Polynomials hashing implementation math *2200	0 / 0	(无)
	4484	P641A Little Artem and Grasshopper implementation *1000	0 / 0	(无)
	4483	P641B Little Artem and Matrix implementation *1400	0 / 0	(无)
	4482	P641C Little Artem and Dance brute force constructive algorithms implementation *1800	0 / 0	(无)
	4481	P641D Little Artem and Random Variable dp implementation math probabilities *2400	0 / 0	(无)
	4477	P643A Bear and Colors implementation *1500	0 / 0	(无)
	4468	P644C Hostname Aliases special problem binary search data structures implementation sortings strings 2100	0 / 0	(无)
	4467	P645A Amity Assessment brute force constructive algorithms implementation *1200	0 / 0	(无)
	4455	P651A Joysticks dp greedy implementation math *1100	0 / 0	(无)
	4453	P652A Gabriel and Caterpillar implementation math *1400	0 / 0	(无)
	4447	P653A Bear and Three Balls brute force implementation sortings *900	0 / 0	(无)
	4445	P653C Bear and Up-Down brute force implementation *1900	0 / 0	(无)
	4439	P656B Scrambled special problem implementation 1700	0 / 0	(无)
	4433	P658A Bear and Reverse Radewoosh implementation *800	0 / 0	(无)
	4432	P659A Round House implementation math *1000	0 / 0	(无)
	4430	P659C Tanya and Toys greedy implementation *1200	0 / 0	(无)
	4429	P659D Bicycle Race geometry implementation math *1500	0 / 0	(无)
	4425	P660A Co-prime Array greedy implementation math number theory *1200	0 / 0	(无)
	4424	P660B Seating On Bus implementation *1000	0 / 0	(无)
	4408	P662D International Olympiad constructive algorithms greedy implementation math *2000	0 / 0	(无)
	4404	P665A Buses Between Cities implementation *1600	0 / 0	(无)
	4398	P666A Reberland Linguistics dp implementation strings *1800	0 / 0	(无)
	4389	P670B Game of Robots implementation *1000	0 / 0	(无)
	4388	P670C Cinema implementation sortings *1300	0 / 0	(无)
	4387	P670D1 Magic Powder - 1 binary search brute force implementation *1400	0 / 0	(无)
	4386	P670D2 Magic Powder - 2 binary search implementation *1500	0 / 0	(无)
	4383	P671A Recycling Bottles dp geometry greedy implementation *1800	0 / 0	(无)
	4378	P672A Summer Camp implementation *800	0 / 0	(无)
	4377	P672B Different is Good constructive algorithms implementation strings *1000	0 / 0	(无)
	4376	P673A Bear and Game implementation *800	0 / 0	(无)
	4375	P673B Problems for Round greedy implementation *1300	0 / 0	(无)
	4369	P676A Nicholas and Permutation constructive algorithms implementation *800	0 / 0	(无)
	4368	P676B Pyramid of Glasses implementation math math *1500	0 / 0	(无)
	4366	P676D Theseus and labyrinth graphs implementation shortest paths *2000	0 / 0	(无)
	4364	P677A Vanya and Fence implementation *800	0 / 0	(无)
	4363	P677B Vanya and Food Processor implementation math *1400	0 / 0	(无)
	4362	P677C Vanya and Label bitmasks combinatorics implementation strings *1500	0 / 0	(无)
	4360	P677E Vanya and Balloons binary search brute force dp implementation *2300	0 / 0	(无)
	4359	P678A Johny Likes Numbers implementation math *800	0 / 0	(无)
	4358	P678B The Same Calendar implementation *1600	0 / 0	(无)
	4357	P678C Joty and Chocolate implementation math number theory *1600	0 / 0	(无)
	4351	P679C Bear and Square Grid dfs and similar dsu implementation *2400	0 / 0	(无)
	4350	P679D Bear and Chase brute force dfs and similar graphs implementation math probabilities *2900	0 / 0	(无)
	4348	P680A Bear and Five Cards constructive algorithms implementation *800	0 / 0	(无)
	4347	P680B Bear and Finding Criminals constructive algorithms implementation *1000	0 / 0	(无)
	4346	P681A A Good Contest implementation *800	0 / 0	(无)
	4323	P685D Kay and Eternity brute force implementation sortings *2600	0 / 0	(无)
	4321	P686A Free Ice Cream constructive algorithms implementation *800	0 / 0	(无)
	4320	P686B Little Robber Girl's Zoo constructive algorithms implementation sortings *1100	0 / 0	(无)
	4314	P688A Opponents implementation *800	0 / 0	(无)
	4308	P689E Mike and Geometry Problem combinatorics data structures dp geometry implementation *2000	0 / 0	(无)
	4290	P691A Fashion in Berland implementation *1000	0 / 0	(无)
	4289	P691B s-palindrome implementation strings *1600	0 / 0	(无)
	4288	P691C Exponential notation implementation strings *1800	0 / 0	(无)
	4284	P696A Lorenzo Von Matterhorn brute force data structures implementation trees *1500	0 / 0	(无)
	4282	P696C PLEASE combinatorics dp implementation math matrices *2000	0 / 0	(无)
	4278	P697A Pineapple Incident implementation math *900	0 / 0	(无)
	4277	P697B Barnicle brute force implementation math strings *1400	0 / 0	(无)
	4270	P699A Launch of Collider implementation *1000	0 / 0	(无)
	4269	P699B One Bomb implementation *1400	0 / 0	(无)
	4263	P701A Cards greedy implementation *800	0 / 0	(无)
	4260	P702A Maximum Increase dp greedy implementation *800	0 / 0	(无)
	4259	P702B Powers of Two brute force data structures implementation math *1500	0 / 0	(无)
	4258	P702C Cellular Network binary search implementation two pointers *1500	0 / 0	(无)
	4254	P703A Mishka and Game implementation *800	0 / 0	(无)
	4253	P703B Mishka and trip implementation math *1400	0 / 0	(无)
	4252	P703C Chris and Road geometry implementation *2100	0 / 0	(无)
	4249	P704A Thor brute force data structures implementation *1600	0 / 0	(无)
	4247	P704C Black Widow dp graphs implementation math *2900	0 / 0	(无)
	4244	P705A Hulk implementation *800	0 / 0	(无)
	4242	P706A Beru-taxi brute force geometry implementation *900	0 / 0	(无)
	4241	P706B Interesting drink binary search dp implementation *1100	0 / 0	(无)
	4238	P706E Working routine data structures implementation *2500	0 / 0	(无)
	4237	P707A Brain's Photos implementation *800	0 / 0	(无)
	4234	P707D Persistent Bookcase bitmasks data structures dfs and similar implementation *2200	0 / 0	(无)
	4232	P708A Letters Cyclic Shift constructive algorithms greedy implementation strings *1200	0 / 0	(无)
	4231	P708B Recover the String constructive algorithms greedy implementation math *1900	0 / 0	(无)
	4227	P709A Juicer implementation *900	0 / 0	(无)
	4226	P709B Checkpoints greedy implementation sortings *1500	0 / 0	(无)
	4225	P710A King Moves implementation *800	0 / 0	(无)
	4219	P711A Bus to Udayland brute force implementation *800	0 / 0	(无)
	4218	P711B Chris and Magic Square constructive algorithms implementation *1400	0 / 0	(无)
	4214	P712A Memory and Crow implementation math *800	0 / 0	(无)
	4213	P712B Memory and Trident implementation strings *1100	0 / 0	(无)
	4209	P713A Sonya and Queries data structures implementation *1400	0 / 0	(无)
	4204	P714A Meeting of Old Friends implementation math *1100	0 / 0	(无)
	4203	P714B Filya and Homework implementation sortings *1200	0 / 0	(无)
	4197	P716A Crazy Computer implementation *800	0 / 0	(无)
	4193	P717C Potions Homework implementation sortings *1200	0 / 0	(无)
	4186	P718A Efim and Strange Grade dp implementation math *1700	0 / 0	(无)
	4182	P719A Vitya in the Countryside implementation *1100	0 / 0	(无)
	4176	P720E Cipher implementation *3100	0 / 0	(无)
	4174	P721A One-dimensional Japanese Crossword implementation *800	0 / 0	(无)
	4173	P721B Passwords implementation math sortings strings *1100	0 / 0	(无)
	4169	P722A Broken Clock brute force implementation *1300	0 / 0	(无)
	4168	P722B Verse Pattern implementation strings *1200	0 / 0	(无)
	4164	P722F Cyclic Cipher chinese remainder theorem data structures implementation number theory two pointers *2800	0 / 0	(无)
	4163	P723A The New Year: Meeting Friends implementation math sortings *800	0 / 0	(无)
	4162	P723B Text Document Analysis expression parsing implementation strings *1100	0 / 0	(无)
	4160	P723D Lakes in Berland dfs and similar dsu graphs greedy implementation *1600	0 / 0	(无)

HGNU

根据当前过滤条件随机选择一道题

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开发与维护

杨旭龙、王树淳、王国斌、宋文宇、朱天伦

特别鸣谢

肖飞、关玉蓉、魏银珍、周芬

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