math - Problem Set - HFOJ

	ID	Problem Show tags Hide tags	AC / Tried	Difficulty
	9940	P1834F Typewriter brute force math *2500	0 / 0	9
	9939	P1835A k-th equality brute force implementation math *1700	0 / 0	5
	9938	P1835B Lottery binary search brute force greedy math two pointers *2500	0 / 0	9
	9937	P1835C Twin Clusters bitmasks brute force constructive algorithms math probabilities *2600	0 / 0	10
	9936	P1835D Doctor's Brown Hypothesis dfs and similar graphs math number theory *2900	0 / 0	10
	9932	P1836B Astrophysicists greedy math *1100	0 / 0	3
	9832	P1837A Grasshopper on a Line constructive algorithms math	0 / 0	(None)
	9872	P1838A Blackboard List constructive algorithms math *800	0 / 0	3
	9871	P1838B Minimize Permutation Subarrays constructive algorithms math *1100	0 / 0	3
	9870	P1838C No Prime Differences constructive algorithms math number theory *1400	0 / 0	4
	9868	P1838E Count Supersequences combinatorics dp math *2500	0 / 0	9
	9866	P1839A The Good Array greedy implementation math *800	0 / 0	3
	9860	P1840B Binary Cafe bitmasks combinatorics math *1100	0 / 0	3
	9859	P1840C Ski Resort combinatorics math two pointers *1000	0 / 0	3
	9855	P1840G1 In Search of Truth (Easy Version) constructive algorithms interactive math meet-in-the-middle probabilities *2200	0 / 0	8
	9854	P1840G2 In Search of Truth (Hard Version) constructive algorithms interactive math meet-in-the-middle probabilities *2500	0 / 0	9
	9851	P1841C Ranom Numbers brute force dp greedy math strings	0 / 8	10
	9849	P1841E Fill the Matrix binary search data structures greedy math string suffix structures	0 / 0	(None)
	9931	P1842A Tenzing and Tsondu games math *800	0 / 0	3
	9930	P1842B Tenzing and Books bitmasks greedy math *1100	0 / 0	3
	9927	P1842E Tenzing and Triangle data structures dp geometry greedy math *2300	0 / 0	8
	9925	P1842G Tenzing and Random Operations combinatorics dp math probabilities *2800	0 / 0	10
	9924	P1842H Tenzing and Random Real Numbers bitmasks dp graphs math probabilities *3000	0 / 0	10
	9921	P1843B Long Long greedy math two pointers *800	0 / 0	3
	9920	P1843C Sum in Binary Tree bitmasks combinatorics math trees *800	0 / 0	3
	9919	P1843D Apple Tree combinatorics dfs and similar dp math trees *1200	0 / 0	4
	9917	P1843F1 Omsk Metro (simple version) data structures dfs and similar dp graphs greedy math trees *1800	0 / 0	6
	9916	P1843F2 Omsk Metro (hard version) data structures dfs and similar divide and conquer dp math trees *2300	0 / 0	8
	9914	P1844B Permutations & Primes constructive algorithms math *1000	0 / 0	3
	9913	P1844C Particles dp greedy implementation math *1300	0 / 0	4
	9912	P1844D Row Major constructive algorithms greedy math number theory strings *1400	0 / 0	4
	9910	P1844F1 Min Cost Permutation (Easy Version) brute force constructive algorithms greedy math *2600	0 / 0	10
	9909	P1844F2 Min Cost Permutation (Hard Version) binary search constructive algorithms data structures greedy math sortings *2800	0 / 0	10
	9908	P1844G Tree Weights bitmasks constructive algorithms data structures dfs and similar implementation math matrices number theory trees *3000	0 / 0	10
	9907	P1844H Multiple of Three Cycles combinatorics data structures dp dsu math *3400	0 / 0	10
	9906	P1845A Forbidden Integer constructive algorithms implementation math number theory *800	0 / 0	3
	9905	P1845B Come Together geometry implementation math *900	0 / 0	3
	9903	P1845D Rating System binary search brute force data structures dp dsu greedy math two pointers *1800	0 / 0	6
	9902	P1845E Boxes and Balls dp implementation math *2500	0 / 0	9
	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
	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
	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)
	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)
	9956	P1851A Escalator Conversations brute force constructive algorithms math	0 / 0	(None)
	9953	P1851D Prefix Permutation Sums implementation math	0 / 0	(None)
	9951	P1851F Lisa and the Martians bitmasks greedy math strings trees	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
	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
	10000	P1854C Expected Destruction combinatorics dp math probabilities *2500	0 / 0	9
	9998	P1854E Game Bundles brute force constructive algorithms dp greedy math *3000	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
	9993	P1856B Good Arrays implementation math *900	0 / 0	3
	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
	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
	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
	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
	9971	P1859E Maximum Monogonosity brute force dp math *2500	0 / 0	9
	9968	P1860B Fancy Coins binary search brute force greedy math	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
	10043	P1861E Non-Intersecting Subpermutations combinatorics dp implementation math	3 / 8	10
	10038	P1862D Ice Cream Balls binary search combinatorics constructive algorithms math	0 / 0	(None)
	10035	P1862G The Great Equalizer binary search data structures math sortings	0 / 0	(None)
	10033	P1863B Split Sort greedy math sortings	0 / 0	(None)
	10032	P1863C MEX Repetition implementation math	0 / 0	(None)
	10030	P1863E Speedrun brute force dfs and similar dp graphs greedy math sortings two pointers	0 / 0	(None)
	10029	P1863F Divide, XOR, and Conquer bitmasks dp math	0 / 0	(None)
	10028	P1863G Swaps combinatorics dp graphs math	0 / 0	(None)
	10025	P1864A Increasing and Decreasing constructive algorithms greedy implementation math	0 / 0	(None)
	10023	P1864C Divisor Chain bitmasks constructive algorithms math number theory	0 / 0	(None)
	10022	P1864D Matrix Cascade brute force constructive algorithms data structures dp greedy math	0 / 0	(None)
	10021	P1864E Guess Game bitmasks data structures games math probabilities sortings strings trees	0 / 0	(None)

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