	ID	题目显示标签隐藏标签	AC / 尝试	难度
	4211	P712D Memory and Scores combinatorics dp math *2200	0 / 0	(无)
	4210	P712E Memory and Casinos data structures math probabilities *2500	0 / 0	(无)
	4209	P713A Sonya and Queries data structures implementation *1400	0 / 0	(无)
	4208	P713B Searching Rectangles binary search constructive algorithms interactive *2200	0 / 0	(无)
	4207	P713C Sonya and Problem Wihtout a Legend dp sortings *2300	0 / 0	(无)
	4206	P713D Animals and Puzzle binary search data structures *2700	0 / 0	(无)
	4205	P713E Sonya Partymaker binary search dp *3300	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)
	4202	P715A Plus and Square Root constructive algorithms math *1600	0 / 0	(无)
	4201	P715B Complete The Graph binary search constructive algorithms graphs shortest paths *2300	0 / 0	(无)
	4200	P715C Digit Tree dfs and similar divide and conquer dsu trees *2700	0 / 0	(无)
	4199	P715D Create a Maze constructive algorithms *3100	0 / 0	(无)
	4198	P715E Complete the Permutations combinatorics fft graphs math *3400	0 / 0	(无)
	4197	P716A Crazy Computer implementation *800	0 / 0	(无)
	4196	P716B Complete the Word greedy two pointers *1300	0 / 0	(无)
	4195	P717A Festival Organization math number theory *2900	0 / 0	(无)
	4194	P717B R3D3’s Summer Adventure dp greedy *2700	0 / 0	(无)
	4193	P717C Potions Homework implementation sortings *1200	0 / 0	(无)
	4192	P717D Dexterina’s Lab games matrices probabilities *1900	0 / 0	(无)
	4191	P717E Paint it really, really dark gray dfs and similar *1900	0 / 0	(无)
	4190	P717F Heroes of Making Magic III data structures *2600	0 / 0	(无)
	4189	P717G Underfail flows *2400	0 / 0	(无)
	4188	P717H Pokermon League challenge math probabilities *2400	0 / 0	(无)
	4187	P717I Cowboy Beblop at his computer geometry *2800	0 / 0	(无)
	4186	P718A Efim and Strange Grade dp implementation math *1700	0 / 0	(无)
	4185	P718C Sasha and Array data structures math matrices *2300	0 / 0	(无)
	4184	P718D Andrew and Chemistry dp hashing trees *2900	0 / 0	(无)
	4183	P718E Matvey's Birthday bitmasks graphs *3300	0 / 0	(无)
	4182	P719A Vitya in the Countryside implementation *1100	0 / 0	(无)
	4181	P719B Anatoly and Cockroaches greedy *1400	0 / 0	(无)
	4180	P720A Closing ceremony greedy *2000	0 / 0	(无)
	4179	P720B Cactusophobia dfs and similar flows *2400	0 / 0	(无)
	4178	P720C Homework constructive algorithms *3100	0 / 0	(无)
	4177	P720D Slalom data structures dp sortings *3100	0 / 0	(无)
	4176	P720E Cipher implementation *3100	0 / 0	(无)
	4175	P720F Array Covering data structures *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)
	4172	P721C Journey dp graphs *1800	0 / 0	(无)
	4171	P721D Maxim and Array constructive algorithms data structures greedy math *2000	0 / 0	(无)
	4170	P721E Road to Home binary search dp *2700	0 / 0	(无)
	4169	P722A Broken Clock brute force implementation *1300	0 / 0	(无)
	4168	P722B Verse Pattern implementation strings *1200	0 / 0	(无)
	4167	P722C Destroying Array data structures dsu *1600	0 / 0	(无)
	4166	P722D Generating Sets binary search data structures dfs and similar greedy strings trees *1900	0 / 0	(无)
	4165	P722E Research Rover combinatorics dp *2900	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)
	4161	P723C Polycarp at the Radio greedy *1600	0 / 0	(无)
	4160	P723D Lakes in Berland dfs and similar dsu graphs greedy implementation *1600	0 / 0	(无)
	4159	P723E One-Way Reform constructive algorithms dfs and similar flows graphs greedy *2200	0 / 0	(无)
	4158	P723F st-Spanning Tree dsu graphs greedy implementation *2300	0 / 0	(无)
	4157	P724A Checking the Calendar implementation *1000	0 / 0	(无)
	4156	P724B Batch Sort brute force greedy implementation math *1500	0 / 0	(无)
	4155	P724C Ray Tracing greedy hashing implementation math number theory sortings *1800	0 / 0	(无)
	4154	P724D Dense Subsequence data structures greedy strings *1900	0 / 0	(无)
	4153	P724E Goods transportation dp flows greedy *2900	0 / 0	(无)
	4152	P724F Uniformly Branched Trees combinatorics dp trees *2700	0 / 0	(无)
	4151	P724G Xor-matic Number of the Graph bitmasks graphs math number theory trees *2600	0 / 0	(无)
	4150	P725A Jumping Ball implementation *1000	0 / 0	(无)
	4149	P725B Food on the Plane implementation math *1200	0 / 0	(无)
	4148	P725C Hidden Word brute force constructive algorithms implementation strings *1600	0 / 0	(无)
	4147	P725D Contest Balloons data structures greedy *1800	0 / 0	(无)
	4146	P725E Too Much Money brute force greedy *2600	0 / 0	(无)
	4145	P725F Family Photos games greedy *2900	0 / 0	(无)
	4144	P725G Messages on a Tree *3300	0 / 0	(无)
	4143	P727A Transformation: from A to B brute force dfs and similar math *1000	0 / 0	(无)
	4142	P727B Bill Total Value expression parsing implementation strings *1600	0 / 0	(无)
	4141	P727C Guess the Array constructive algorithms interactive math *1400	0 / 0	(无)
	4140	P727D T-shirts Distribution constructive algorithms flows greedy *1800	0 / 0	(无)
	4139	P727E Games on a CD data structures hashing string suffix structures strings *2300	0 / 0	(无)
	4138	P727F Polycarp's problems binary search dp greedy *2300	0 / 0	(无)
	4137	P729A Interview with Oleg implementation strings *900	0 / 0	(无)
	4136	P729B Spotlights dp implementation *1200	0 / 0	(无)
	4135	P729C Road to Cinema binary search greedy sortings *1700	0 / 0	(无)
	4134	P729D Sea Battle constructive algorithms greedy math *1700	0 / 0	(无)
	4133	P729E Subordinates constructive algorithms data structures graphs greedy sortings *1900	0 / 0	(无)
	4132	P729F Financiers Game dp *2500	0 / 0	(无)
	4131	P730A Toda 2 greedy implementation *1800	0 / 0	(无)
	4130	P730B Minimum and Maximum constructive algorithms interactive *1800	0 / 0	(无)
	4129	P730C Bulmart binary search dfs and similar *2100	0 / 0	(无)
	4128	P730D Running Over The Bridges greedy implementation math *2200	0 / 0	(无)
	4127	P730E Award Ceremony greedy implementation *2200	0 / 0	(无)
	4126	P730F Ber Patio *3100	0 / 0	(无)
	4125	P730G Car Repair Shop implementation *1600	0 / 0	(无)
	4124	P730H Delete Them constructive algorithms implementation *1300	0 / 0	(无)
	4123	P730I Olympiad in Programming and Sports dp flows graphs greedy *2000	0 / 0	(无)
	4122	P730J Bottles dp *1900	0 / 0	(无)
	4121	P730K Roads Orientation Problem graphs *3200	0 / 0	(无)
	4120	P730L Expression Queries data structures *3200	0 / 0	(无)
	4119	P731A Night at the Museum implementation strings *800	0 / 0	(无)
	4118	P731B Coupons and Discounts constructive algorithms greedy *1100	0 / 0	(无)
	4117	P731C Socks dfs and similar dsu graphs greedy *1600	0 / 0	(无)
	4116	P731D 80-th Level Archeology brute force data structures greedy sortings *2200	0 / 0	(无)
	4115	P731E Funny Game dp games *2200	0 / 0	(无)
	4114	P731F Video Cards brute force data structures implementation math number theory *1900	0 / 0	(无)
	4113	P732A Buy a Shovel brute force constructive algorithms implementation math *800	0 / 0	(无)
	4112	P732B Cormen — The Best Friend Of a Man dp greedy *1000	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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