bitmasks - Problem Set - HFOJ

	ID	Problem Show tags Hide tags	AC / Tried	Difficulty
	940	P1705F Mark and the Online Exam bitmasks constructive algorithms interactive probabilities *2900	0 / 0	10
	928	P1707F Bugaboo bitmasks constructive algorithms dp number theory *3500	0 / 0	10
	921	P1709E XOR Tree bitmasks data structures dfs and similar dsu greedy trees *2400	0 / 0	9
	920	P1709F Multiset of Strings bitmasks brute force dp fft flows graphs math meet-in-the-middle trees *2500	0 / 0	9
	917	P1710C XOR Triangle bitmasks brute force constructive algorithms dp greedy math *2500	0 / 0	9
	900	P1713F Lost Array bitmasks combinatorics constructive algorithms dp math *2900	0 / 0	10
	889	P1715D 2+ doors 2-sat bitmasks graphs greedy *1900	0 / 0	6
	882	P1716E Swap and Maximum Block bitmasks data structures dfs and similar divide and conquer dp *2500	0 / 0	9
	861	P1720D1 Xor-Subsequence (easy version) bitmasks brute force dp strings trees two pointers *1800	0 / 0	6
	860	P1720D2 Xor-Subsequence (hard version) bitmasks data structures dp strings trees *2400	0 / 0	9
	855	P1721D Maximum AND bitmasks dfs and similar divide and conquer greedy sortings *1800	0 / 0	6
	846	P1722G Even-Odd XOR bitmasks constructive algorithms greedy *1500	0 / 0	5
	842	P1725D Deducing Sortability binary search bitmasks math *2900	0 / 0	10
	840	P1725F Field Photography bitmasks data structures sortings *2100	0 / 0	7
	831	P1726B Mainak and Interesting Sequence bitmasks constructive algorithms math *1100	0 / 0	3
	818	P1728G Illumination binary search bitmasks brute force combinatorics dp math two pointers *2700	0 / 0	10
	805	P1730F Almost Sorted bitmasks data structures dp *2700	0 / 0	10
	802	P1731C Even Subarrays bitmasks brute force hashing math number theory *1700	0 / 0	5
	796	P1732C1 Sheikh (Easy version) binary search bitmasks greedy two pointers *1800	0 / 0	6
	795	P1732C2 Sheikh (Hard Version) binary search bitmasks brute force greedy implementation two pointers *2100	0 / 0	7
	780	P1734F Zeros and Ones bitmasks divide and conquer dp math *2500	0 / 0	9
	741	P1739E Cleaning Robot bitmasks dp *2400	0 / 0	9
	740	P1739F Keyboard Design bitmasks data structures dp string suffix structures strings *2600	0 / 0	10
	720	P1741G Kirill and Company bitmasks brute force dfs and similar dp flows graphs shortest paths *2200	0 / 0	8
	705	P1742G Orray bitmasks brute force greedy math sortings *1500	0 / 0	5
	691	P1743G Antifibonacci Cut bitmasks combinatorics constructive algorithms data structures dp hashing math *3000	0 / 0	10
	662	P1747D Yet Another Problem binary search bitmasks constructive algorithms data structures *1900	0 / 0	6
	651	P1748D ConstructOR bitmasks chinese remainder theorem combinatorics constructive algorithms math number theory *2100	0 / 0	7
	649	P1748F Circular Xor Reversal bitmasks constructive algorithms *3000	0 / 0	10
	566	P1760G SlavicG's Favorite Problem bitmasks dfs and similar graphs *1700	0 / 0	5
	545	P1763A Absolute Maximization bitmasks constructive algorithms greedy math *800	0 / 0	3
	515	P1765A Access Levels bitmasks dsu flows graph matchings *2400	0 / 0	9
	475	P1767E Algebra Flash bitmasks brute force dp graphs math meet-in-the-middle trees *2500	0 / 0	9
	453	P1770F Koxia and Sequence bitmasks combinatorics dp math number theory *3100	0 / 0	10
	438	P1771F Hossam and Range Minimum Query binary search bitmasks data structures hashing probabilities strings trees *2500	0 / 0	9
	429	P1773G Game of Questions bitmasks combinatorics dp fft math probabilities *2800	0 / 0	10
	403	P1775B Gardener and the Array bitmasks constructive algorithms *1300	0 / 0	4
	402	P1775C Interesting Sequence bitmasks math *1600	0 / 0	5
	370	P1777D Score of a Tree bitmasks combinatorics dfs and similar dp math probabilities trees *1900	0 / 0	6
	367	P1777F Comfortably Numb bitmasks data structures divide and conquer strings trees *2400	0 / 0	9
	363	P1778C Flexible String bitmasks brute force strings *1600	0 / 0	5
	360	P1778E The Tree Has Fallen! bitmasks dfs and similar math trees *2500	0 / 0	9
	349	P1779F Xorcerer's Stones bitmasks constructive algorithms dp trees *2500	0 / 0	9
	341	P1780D Bit Guessing Game binary search bitmasks constructive algorithms interactive *1800	0 / 0	6
	339	P1780F Three Chairs bitmasks brute force combinatorics data structures dp number theory sortings *2300	0 / 0	8
	298	P1787E The Harmonization of XOR bitmasks constructive algorithms greedy math *2100	0 / 0	7
	283	P1788F XOR, Tree, and Queries bitmasks constructive algorithms dfs and similar dsu graphs greedy implementation trees *2500	0 / 0	9
	278	P1789D Serval and Shift-Shift-Shift bitmasks brute force constructive algorithms implementation *2200	0 / 0	8
	276	P1789F Serval and Brain Power bitmasks brute force dp greedy implementation strings *2700	0 / 0	10
	270	P1790E Vlad and a Pair of Numbers bitmasks constructive algorithms *1400	0 / 0	4
	252	P1792D Fixed Prefix Permutations binary search bitmasks data structures hashing math sortings *1700	0 / 0	5
	221	P1795G Removal Sequences bitmasks dfs and similar graphs *2700	0 / 0	10
	180	P1799H Tree Cutting bitmasks dfs and similar dp *3200	0 / 0	10
	168	P1800F Dasha and Nightmares bitmasks hashing meet-in-the-middle strings *1900	0 / 0	6
	165	P1801A The Very Beautiful Blanket bitmasks constructive algorithms *1600	0 / 0	5
	145	P1804E Routing bitmasks brute force dfs and similar dp graphs *2400	0 / 0	9
	142	P1804H Code Lock bitmasks dp *3300	0 / 0	10
	141	P1805A We Need the Zero bitmasks brute force *800	0 / 0	3
	112	P1807G2 Subsequence Addition (Hard Version) bitmasks dp greedy implementation sortings *1100	0 / 0	3
	43	P1815D XOR Counting bitmasks combinatorics dp math *2600	0 / 0	10
	9791	P1824C LuoTianyi and XOR-Tree bitmasks data structures dfs and similar dp dsu greedy trees	0 / 0	(None)
	9782	P1826E Walk the Runway bitmasks brute force data structures dp graphs implementation sortings	0 / 0	(None)
	9775	P1829C Mr bitmasks greedy implementation	0 / 0	(None)
	9767	P1829H Don't Blame Me bitmasks combinatorics dp math	0 / 0	(None)
	9937	P1835C Twin Clusters bitmasks brute force constructive algorithms math probabilities *2600	0 / 0	10
	9934	P1835F Good Graph bitmasks dfs and similar graph matchings graphs implementation *3500	0 / 0	10
	9860	P1840B Binary Cafe bitmasks combinatorics math *1100	0 / 0	3
	9930	P1842B Tenzing and Books bitmasks greedy math *1100	0 / 0	3
	9924	P1842H Tenzing and Random Real Numbers bitmasks dp graphs math probabilities *3000	0 / 0	10
	9920	P1843C Sum in Binary Tree bitmasks combinatorics math trees *800	0 / 0	3
	9908	P1844G Tree Weights bitmasks constructive algorithms data structures dfs and similar implementation math matrices number theory trees *3000	0 / 0	10
	9893	P1846G Rudolf and CodeVid-23 bitmasks dp graphs greedy shortest paths *1900	0 / 0	6
	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
	9887	P1847F The Boss's Identity binary search bitmasks data structures dfs and similar greedy math sortings *2500	0 / 0	9
	9881	P1848F Vika and Wiki binary search bitmasks combinatorics divide and conquer dp math *2400	0 / 0	9
	9957	P1849F XOR Partition binary search bitmasks data structures divide and conquer greedy trees	0 / 0	(None)
	9951	P1851F Lisa and the Martians bitmasks greedy math strings trees	0 / 0	(None)
	10001	P1854B Earn or Unlock bitmasks brute force dp *2200	0 / 0	8
	9989	P1856E2 PermuTree (hard version) bitmasks dfs and similar dp fft greedy implementation math trees *2700	0 / 0	10
	10042	P1861F Four Suits binary search bitmasks flows greedy	0 / 0	(None)
	10036	P1862F Magic Will Save the World binary search bitmasks brute force dp	0 / 0	(None)
	10029	P1863F Divide, XOR, and Conquer bitmasks dp math	0 / 0	(None)
	10023	P1864C Divisor Chain bitmasks constructive algorithms math number theory	0 / 0	(None)
	10021	P1864E Guess Game bitmasks data structures games math probabilities sortings strings trees	0 / 0	(None)
	10069	P1867B XOR Palindromes bitmasks constructive algorithms strings	0 / 0	(None)
	10062	P1868B1 Candy Party (Easy Version) bitmasks constructive algorithms graphs greedy implementation math	0 / 0	(None)
	10061	P1868B2 Candy Party (Hard Version) bitmasks constructive algorithms dp graphs greedy implementation math	0 / 0	(None)
	10129	P1870B Friendly Arrays bitmasks greedy math *1200	0 / 0	4
	10126	P1870E Another MEX Problem bitmasks brute force dp shortest paths *2300	0 / 0	8
	10050	P1872E Data Structures Fan binary search bitmasks data structures dp	0 / 0	(None)
	10113	P1874B Jellyfish and Math bitmasks brute force dfs and similar dp graphs shortest paths	0 / 0	(None)
	10106	P1875C Jellyfish and Green Apple bitmasks greedy math number theory	0 / 0	(None)
	10091	P1878E Iva & Pav binary search bitmasks data structures greedy	0 / 0	(None)
	10089	P1878G wxhtzdy ORO Tree binary search bitmasks brute force data structures dfs and similar implementation trees	0 / 0	(None)
	10085	P1879D Sum of XOR Functions bitmasks combinatorics divide and conquer dp math *1700	0 / 0	5
	10081	P1882B Sets and Union bitmasks brute force constructive algorithms greedy	0 / 0	(None)
	10079	P1882D Tree XOR bitmasks dfs and similar dp greedy trees	0 / 0	(None)
	10159	P1883E Look Back bitmasks greedy	0 / 0	(None)
	10072	P1886E I Wanna be the Team Leader bitmasks divide and conquer dp two pointers	0 / 0	(None)

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