Problem Set - HFOJ

	ID	Problem Show tags Hide tags	AC / Tried	Difficulty
	9901	P1845F Swimmers in the Pool dp fft math number theory *2800	0 / 0	10
	9900	P1846A Rudolph and Cut the Rope implementation math *800	0 / 0	3
	9899	P1846B Rudolph and Tic-Tac-Toe brute force implementation strings *800	0 / 0	3
	9898	P1846C Rudolf and the Another Competition constructive algorithms data structures dp greedy sortings *1200	0 / 0	4
	9897	P1846D Rudolph and Christmas Tree constructive algorithms geometry math *1200	0 / 0	4
	9896	P1846E1 Rudolf and Snowflakes (simple version) brute force implementation math *1300	0 / 0	4
	9895	P1846E2 Rudolf and Snowflakes (hard version) binary search brute force implementation math *1800	0 / 0	6
	9894	P1846F Rudolph and Mimic constructive algorithms implementation interactive *1800	0 / 0	6
	9893	P1846G Rudolf and CodeVid-23 bitmasks dp graphs greedy shortest paths *1900	0 / 0	6
	9892	P1847A The Man who became a God greedy sortings *800	0 / 0	3
	9891	P1847B Hamon Odyssey bitmasks greedy two pointers *1000	0 / 0	3
	9890	P1847C Vampiric Powers, anyone? bitmasks brute force dp greedy *1400	0 / 0	4
	9889	P1847D Professor Higashikata data structures dsu greedy implementation strings *1900	0 / 0	6
	9888	P1847E Triangle Platinum? brute force combinatorics implementation interactive math probabilities *2900	0 / 0	10
	9887	P1847F The Boss's Identity binary search bitmasks data structures dfs and similar greedy math sortings *2500	0 / 0	9
	9886	P1848A Vika and Her Friends games math *900	0 / 0	3
	9885	P1848B Vika and the Bridge binary search data structures greedy implementation math sortings *1200	0 / 0	4
	9884	P1848C Vika and Price Tags math number theory *1800	0 / 0	6
	9883	P1848D Vika and Bonuses binary search brute force math ternary search *2200	0 / 0	8
	9882	P1848E Vika and Stone Skipping brute force implementation math number theory *2600	0 / 0	10
	9881	P1848F Vika and Wiki binary search bitmasks combinatorics divide and conquer dp math *2400	0 / 0	9
	9962	P1849A Morning Sandwich implementation math	0 / 0	(None)
	9961	P1849B Monsters greedy math sortings	0 / 0	(None)
	9960	P1849C Binary String Copying binary search brute force data structures hashing strings	0 / 0	(None)
	9959	P1849D Array Painting brute force constructive algorithms dp greedy implementation two pointers	0 / 0	(None)
	9958	P1849E Max to the Right of Min binary search data structures divide and conquer dp dsu two pointers	0 / 0	(None)
	9957	P1849F XOR Partition binary search bitmasks data structures divide and conquer greedy trees	0 / 0	(None)
	9880	P1850A To My Critics implementation sortings	0 / 0	(None)
	9879	P1850B Ten Words of Wisdom implementation sortings	0 / 0	(None)
	9878	P1850C Word on the Paper implementation strings	0 / 0	(None)
	9877	P1850D Balanced Round brute force greedy implementation sortings	0 / 0	(None)
	9876	P1850E Cardboard for Pictures binary search implementation math	0 / 0	(None)
	9875	P1850F We Were Both Children brute force implementation math number theory	0 / 0	(None)
	9874	P1850G The Morning Star data structures geometry implementation math sortings	0 / 0	(None)
	9873	P1850H The Third Letter dfs and similar graphs greedy implementation	0 / 0	(None)
	9956	P1851A Escalator Conversations brute force constructive algorithms math	0 / 0	(None)
	9955	P1851B Parity Sort greedy sortings two pointers	0 / 0	(None)
	9954	P1851C Tiles Comeback greedy	0 / 0	(None)
	9953	P1851D Prefix Permutation Sums implementation math	0 / 0	(None)
	9952	P1851E Nastya and Potions dfs and similar dp graphs sortings	0 / 0	(None)
	9951	P1851F Lisa and the Martians bitmasks greedy math strings trees	0 / 0	(None)
	9950	P1851G Vlad and the Mountains binary search data structures dsu graphs implementation sortings trees two pointers	0 / 0	(None)
	9949	P1852A Ntarsis' Set binary search math number theory *1800	0 / 0	6
	9948	P1852B Imbalanced Arrays constructive algorithms graphs greedy math sortings two pointers *1800	0 / 0	6
	9947	P1852C Ina of the Mountain data structures dp greedy math *2400	0 / 0	9
	9946	P1852D Miriany and Matchstick constructive algorithms dp greedy *2800	0 / 0	10
	9945	P1852E Rivalries constructive algorithms data structures greedy *3400	0 / 0	10
	9944	P1852F Panda Meetups data structures dp flows *3500	0 / 0	10
	9943	P1853A Desorting brute force greedy math *800	0 / 0	3
	9942	P1853B Fibonaccharsis binary search brute force math *1200	0 / 0	4
	10003	P1854A1 Dual (Easy Version) constructive algorithms math *1400	0 / 0	4
	10002	P1854A2 Dual (Hard Version) constructive algorithms math *1900	0 / 0	6
	10001	P1854B Earn or Unlock bitmasks brute force dp *2200	0 / 0	8
	10000	P1854C Expected Destruction combinatorics dp math probabilities *2500	0 / 0	9
	9999	P1854D Michael and Hotel binary search interactive trees *3000	0 / 0	10
	9998	P1854E Game Bundles brute force constructive algorithms dp greedy math *3000	0 / 0	10
	9997	P1854F Mark and Spaceship brute force dp *3500	0 / 0	10
	9996	P1855A Dalton the Teacher greedy math *800	0 / 0	3
	9995	P1855B Longest Divisors Interval brute force combinatorics greedy math number theory *900	0 / 0	3
	9994	P1856A Tales of a Sort implementation *800	0 / 0	3
	9993	P1856B Good Arrays implementation math *900	0 / 0	3
	9992	P1856C To Become Max binary search brute force data structures dp *1600	0 / 0	5
	9991	P1856D More Wrong divide and conquer interactive *2100	0 / 0	7
	9990	P1856E1 PermuTree (easy version) dfs and similar dp trees *1800	0 / 0	6
	9989	P1856E2 PermuTree (hard version) bitmasks dfs and similar dp fft greedy implementation math trees *2700	0 / 0	10
	9988	P1857A Array Coloring greedy math *800	0 / 0	3
	9987	P1857B Maximum Rounding greedy implementation math *1100	0 / 0	3
	9986	P1857C Assembly via Minimums greedy sortings *1200	0 / 0	4
	9985	P1857D Strong Vertices math sortings trees *1300	0 / 0	4
	9984	P1857E Power of Points math sortings *1500	0 / 0	5
	9983	P1857F Sum and Product binary search data structures math *1600	0 / 0	5
	9982	P1857G Counting Graphs combinatorics divide and conquer dsu graphs greedy sortings trees *2000	0 / 0	7
	9981	P1858A Buttons games greedy math *800	0 / 0	3
	9980	P1858B The Walkway brute force dp greedy math number theory *1500	0 / 0	5
	9979	P1858C Yet Another Permutation Problem constructive algorithms greedy math number theory *1000	0 / 0	3
	9978	P1858D Trees and Segments brute force data structures dp greedy two pointers *2200	0 / 0	8
	9977	P1858E1 Rollbacks (Easy Version) brute force data structures dfs and similar trees *2500	0 / 0	9
	9976	P1858E2 Rollbacks (Hard Version) data structures interactive trees *2600	0 / 0	10
	9975	P1859A United We Stand constructive algorithms math number theory *800	0 / 0	3
	9974	P1859B Olya and Game with Arrays constructive algorithms greedy math sortings *1000	0 / 0	3
	9973	P1859C Another Permutation Problem brute force dp greedy math *1200	0 / 0	4
	9972	P1859D Andrey and Escape from Capygrad binary search data structures dp dsu greedy sortings *1800	0 / 0	6
	9971	P1859E Maximum Monogonosity brute force dp math *2500	0 / 0	9
	9970	P1859F Teleportation in Byteland data structures dfs and similar divide and conquer graphs shortest paths trees *3200	0 / 0	10
	9969	P1860A Not a Substring constructive algorithms strings	0 / 0	(None)
	9968	P1860B Fancy Coins binary search brute force greedy math	0 / 0	(None)
	9967	P1860C Game on Permutation data structures dp games greedy	0 / 0	(None)
	9966	P1860D Balanced String dp	0 / 0	(None)
	9965	P1860E Fast Travel Text Editor data structures dfs and similar graphs shortest paths	0 / 0	(None)
	9964	P1860F Evaluate RBS data structures geometry implementation math sortings	0 / 0	(None)
	10047	P1861A Prime Deletion constructive algorithms math	19 / 44	5
	10046	P1861B Two Binary Strings constructive algorithms dp greedy	17 / 41	5
	10045	P1861C Queries for the Array data structures dfs and similar implementation strings trees	9 / 31	7
	10044	P1861D Sorting By Multiplication dp greedy	6 / 26	8
	10043	P1861E Non-Intersecting Subpermutations combinatorics dp implementation math	3 / 8	10
	10042	P1861F Four Suits binary search bitmasks flows greedy	0 / 0	(None)
	10041	P1862A Gift Carpet dp greedy implementation strings	0 / 0	(None)
	10040	P1862B Sequence Game constructive algorithms	0 / 0	(None)
	10039	P1862C Flower City Fence binary search data structures implementation sortings	0 / 0	(None)
	10038	P1862D Ice Cream Balls binary search combinatorics constructive algorithms math	0 / 0	(None)

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