	ID	题目显示标签隐藏标签	AC / 尝试	难度
	4509	P632F Magic Matrix brute force divide and conquer graphs matrices trees *2400	0 / 0	(无)
	4508	P633A Ebony and Ivory brute force math number theory *1100	0 / 0	(无)
	4507	P633B A Trivial Problem brute force constructive algorithms math number theory *1300	0 / 0	(无)
	4505	P633D Fibonacci-ish brute force dp hashing implementation math *2000	0 / 0	(无)
	4499	P635A Orchestra brute force implementation *1100	0 / 0	(无)
	4496	P637C Promocodes with Mistakes special problem brute force constructive algorithms implementation 1400	0 / 0	(无)
	4491	P638D Three-dimensional Turtle Super Computer brute force dfs and similar graphs *1800	0 / 0	(无)
	4482	P641C Little Artem and Dance brute force constructive algorithms implementation *1800	0 / 0	(无)
	4467	P645A Amity Assessment brute force constructive algorithms implementation *1200	0 / 0	(无)
	4459	P650B Image Preview binary search brute force dp two pointers *1900	0 / 0	(无)
	4447	P653A Bear and Three Balls brute force implementation sortings *900	0 / 0	(无)
	4446	P653B Bear and Compressing brute force dfs and similar dp strings *1300	0 / 0	(无)
	4445	P653C Bear and Up-Down brute force implementation *1900	0 / 0	(无)
	4409	P662C Binary Table bitmasks brute force divide and conquer dp fft math *2600	0 / 0	(无)
	4407	P662E To Hack or not to Hack brute force dp greedy *3100	0 / 0	(无)
	4403	P665B Shopping brute force *1400	0 / 0	(无)
	4395	P666D Chain Reaction brute force geometry *3000	0 / 0	(无)
	4390	P670A Holidays brute force constructive algorithms greedy math *900	0 / 0	(无)
	4387	P670D1 Magic Powder - 1 binary search brute force implementation *1400	0 / 0	(无)
	4384	P670F Restore a Number brute force constructive algorithms strings *2300	0 / 0	(无)
	4373	P675B Restoring Painting brute force constructive algorithms math *1400	0 / 0	(无)
	4360	P677E Vanya and Balloons binary search brute force dp implementation *2300	0 / 0	(无)
	4350	P679D Bear and Chase brute force dfs and similar graphs implementation math probabilities *2900	0 / 0	(无)
	4345	P681B Economy Game brute force *1300	0 / 0	(无)
	4326	P685A Robbers' watch brute force combinatorics dp math *1700	0 / 0	(无)
	4323	P685D Kay and Eternity brute force implementation sortings *2600	0 / 0	(无)
	4322	P685E Travelling Through the Snow Queen's Kingdom bitmasks brute force divide and conquer graphs *2800	0 / 0	(无)
	4316	P687D Dividing Kingdom II brute force data structures dsu graphs sortings *2500	0 / 0	(无)
	4285	P691F Couple Cover brute force dp number theory *2200	0 / 0	(无)
	4284	P696A Lorenzo Von Matterhorn brute force data structures implementation trees *1500	0 / 0	(无)
	4277	P697B Barnicle brute force implementation math strings *1400	0 / 0	(无)
	4273	P698D Limak and Shooting Points brute force geometry math *2600	0 / 0	(无)
	4259	P702B Powers of Two brute force data structures implementation math *1500	0 / 0	(无)
	4249	P704A Thor brute force data structures implementation *1600	0 / 0	(无)
	4242	P706A Beru-taxi brute force geometry implementation *900	0 / 0	(无)
	4224	P710B Optimal Point on a Line brute force sortings *1400	0 / 0	(无)
	4220	P710F String Set Queries brute force data structures hashing interactive string suffix structures strings *2400	0 / 0	(无)
	4219	P711A Bus to Udayland brute force implementation *800	0 / 0	(无)
	4169	P722A Broken Clock brute force implementation *1300	0 / 0	(无)
	4156	P724B Batch Sort brute force greedy implementation math *1500	0 / 0	(无)
	4148	P725C Hidden Word brute force constructive algorithms implementation strings *1600	0 / 0	(无)
	4146	P725E Too Much Money brute force greedy *2600	0 / 0	(无)
	4143	P727A Transformation: from A to B brute force dfs and similar math *1000	0 / 0	(无)
	4116	P731D 80-th Level Archeology brute force data structures greedy sortings *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)
	4100	P734B Anton and Digits brute force greedy implementation math *800	0 / 0	(无)
	4082	P739E Gosha is hunting brute force data structures dp flows math probabilities sortings *3000	0 / 0	(无)
	4081	P740A Alyona and copybooks brute force implementation *1300	0 / 0	(无)
	4073	P742B Arpa’s obvious problem and Mehrdad’s terrible solution brute force math number theory *1500	0 / 0	(无)
	4070	P743C Vladik and fractions brute force constructive algorithms math number theory *1500	0 / 0	(无)
	4068	P743E Vladik and cards binary search bitmasks brute force dp *2200	0 / 0	(无)
	4065	P744C Hongcow Buys a Deck of Cards bitmasks brute force dp *2400	0 / 0	(无)
	4053	P747A Display Size brute force math *800	0 / 0	(无)
	4048	P747F Igor and Interesting Numbers brute force combinatorics dp math *2500	0 / 0	(无)
	4040	P749B Parallelogram is Back brute force constructive algorithms geometry *1200	0 / 0	(无)
	4036	P750A New Year and Hurry binary search brute force implementation math *800	0 / 0	(无)
	4033	P750D New Year and Fireworks brute force data structures dfs and similar dp implementation *1900	0 / 0	(无)
	4030	P750G New Year and Binary Tree Paths bitmasks brute force combinatorics dp *3200	0 / 0	(无)
	4027	P753B Interactive Bulls and Cows (Easy) brute force constructive algorithms implementation *1600	0 / 0	(无)
	4026	P753C Interactive Bulls and Cows (Hard) brute force constructive algorithms interactive *2500	0 / 0	(无)
	4024	P754B Ilya and tic-tac-toe game brute force implementation *1100	0 / 0	(无)
	4023	P754C Vladik and chat brute force constructive algorithms dp implementation strings *2200	0 / 0	(无)
	4021	P754E Dasha and cyclic table bitmasks brute force fft strings trees *2600	0 / 0	(无)
	4020	P755A PolandBall and Hypothesis brute force graphs math number theory *800	0 / 0	(无)
	4010	P756D Bacterial Melee brute force combinatorics dp string suffix structures *2400	0 / 0	(无)
	4003	P757E Bash Plays with Functions brute force combinatorics dp number theory *2500	0 / 0	(无)
	3999	P758B Blown Garland brute force implementation number theory *1100	0 / 0	(无)
	3995	P758F Geometrical Progression brute force math number theory *2400	0 / 0	(无)
	3992	P761A Dasha and Stairs brute force constructive algorithms implementation math *1000	0 / 0	(无)
	3991	P761B Dasha and friends brute force implementation math *1300	0 / 0	(无)
	3990	P761C Dasha and Password brute force dp implementation *1500	0 / 0	(无)
	3989	P761D Dasha and Very Difficult Problem binary search brute force constructive algorithms greedy sortings *1700	0 / 0	(无)
	3987	P761F Dasha and Photos brute force data structures dp implementation *2600	0 / 0	(无)
	3978	P763C Timofey and remoduling brute force implementation math number theory *2600	0 / 0	(无)
	3975	P764A Taymyr is calling you brute force implementation math *800	0 / 0	(无)
	3967	P765G Math, math everywhere brute force dp math meet-in-the-middle number theory *3200	0 / 0	(无)
	3964	P766C Mahmoud and a Message brute force dp greedy strings *1700	0 / 0	(无)
	3960	P767B The Queue brute force greedy *2100	0 / 0	(无)
	3954	P768C Jon Snow and his Favourite Number brute force dp implementation sortings *1800	0 / 0	(无)
	3951	P768F Barrels and boxes brute force combinatorics math number theory probabilities *2300	0 / 0	(无)
	3946	P769D k-Interesting Pairs Of Integers special problem bitmasks brute force meet-in-the-middle 1700	0 / 0	(无)
	3929	P773B Dynamic Problem Scoring brute force greedy *2000	0 / 0	(无)
	3911	P776A A Serial Killer brute force implementation strings *900	0 / 0	(无)
	3909	P776C Molly's Chemicals binary search brute force data structures implementation math *1800	0 / 0	(无)
	3900	P777E Hanoi Factory brute force data structures dp greedy sortings *2000	0 / 0	(无)
	3898	P778B Bitwise Formula bitmasks brute force dfs and similar expression parsing implementation *1800	0 / 0	(无)
	3897	P778C Peterson Polyglot brute force dfs and similar dsu hashing strings trees *2500	0 / 0	(无)
	3893	P779B Weird Rounding brute force greedy *1100	0 / 0	(无)
	3879	P784E Twisted Circuit special problem brute force implementation 2000	0 / 0	(无)
	3872	P785E Anton and Permutation brute force data structures *2200	0 / 0	(无)
	3866	P787A The Monster brute force math number theory *1200	0 / 0	(无)
	3858	P789B Masha and geometric depression brute force implementation math *1700	0 / 0	(无)
	3843	P794A Bank Robbery brute force implementation *800	0 / 0	(无)
	3836	P796A Buying A House brute force implementation *800	0 / 0	(无)
	3826	P797E Array Queries brute force data structures dp *2000	0 / 0	(无)
	3824	P798A Mike and palindrome brute force constructive algorithms strings *1000	0 / 0	(无)
	3823	P798B Mike and strings brute force dp strings *1300	0 / 0	(无)
	3819	P799A Carrot Cakes brute force implementation *1100	0 / 0	(无)
	3816	P799D Field expansion brute force dp meet-in-the-middle *2100	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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