Problemset - Codeforces

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bitmasks

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Problems

#	Name
1973B	Cat, Fox and the Lonely Array binary search, bitmasks, data structures, greedy, math, two pointers	1300	x10138
1965B	Missing Subsequence Sum bitmasks, constructive algorithms, greedy, number theory	1800	x5241
1957D	A BIT of an Inequality bitmasks, brute force, dp, math	1900	x3735
1957B	A BIT of a Construction bitmasks, constructive algorithms, greedy, implementation	1100	x15369
1956D	Nene and the Mex Operator bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math	2000	x3309
1950G	Shuffling Songs bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings	1900	x3581
1950F	0, 1, 2, Tree! bitmasks, brute force, greedy, implementation, trees	1700	x7765
1946D	Birthday Gift bitmasks, brute force, constructive algorithms, greedy, implementation	1900	x4104
1944B	Equal XOR bitmasks, constructive algorithms	1100	x14453
1936A	Bitwise Operation Wizard bitmasks, constructive algorithms, greedy, interactive, math	1700	x6641
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x10198
1926D	Vlad and Division bitmasks, greedy	1300	x13768
1922E	Increasing Subsequences bitmasks, constructive algorithms, divide and conquer, greedy, math	1800	x7098
1918C	XOR-distance bitmasks, greedy, implementation, math	1400	x12671
1915B	Not Quite Latin Square bitmasks, brute force, implementation	800	x38849
1915A	Odd One Out bitmasks, implementation	800	x50314
1913C	Game with Multiset binary search, bitmasks, brute force, greedy	1300	x13794
1912K	Kim's Quest bitmasks, combinatorics, dp	1800	x2071
1909B	Make Almost Equal With Mod bitmasks, constructive algorithms, math, number theory	1200	x14134
1903D1	Maximum And Queries (easy version) binary search, bitmasks, brute force, greedy	1700	x5145
1903B	StORage room bitmasks, brute force, constructive algorithms, greedy	1200	x11495
1900D	Small GCD bitmasks, brute force, dp, math, number theory	2000	x3749
1895D	XOR Construction bitmasks, constructive algorithms, data structures, math, string suffix structures, trees	1900	x5601
1883E	Look Back bitmasks, greedy	1700	x7126
1882D	Tree XOR bitmasks, dfs and similar, dp, greedy, trees	1900	x5006
1882B	Sets and Union bitmasks, brute force, constructive algorithms, greedy	1300	x14377
1879D	Sum of XOR Functions bitmasks, combinatorics, divide and conquer, dp, math	1700	x6645
1878E	Iva & Pav binary search, bitmasks, data structures, greedy	1400	x11235
1875C	Jellyfish and Green Apple bitmasks, greedy, math, number theory	1400	x10861
1872E	Data Structures Fan binary search, bitmasks, data structures, dp	1500	x12147
1870B	Friendly Arrays bitmasks, greedy, math	1200	x13418
1868B1	Candy Party (Easy Version) bitmasks, constructive algorithms, graphs, greedy, implementation, math	1700	x6497
1867B	XOR Palindromes bitmasks, constructive algorithms, strings	1100	x15913
1864C	Divisor Chain bitmasks, constructive algorithms, math, number theory	1300	x12680
1862F	Magic Will Save the World binary search, bitmasks, brute force, dp	1800	x5732
1851F	Lisa and the Martians bitmasks, greedy, math, strings, trees	1800	x5347
1847C	Vampiric Powers, anyone? bitmasks, brute force, dp, greedy	1400	x12273
1847B	Hamon Odyssey bitmasks, greedy, two pointers	1000	x19173
1846G	Rudolf and CodeVid-23 bitmasks, dp, graphs, greedy, shortest paths	1900	x4070
1843C	Sum in Binary Tree bitmasks, combinatorics, math, trees	800	x31239
1842B	Tenzing and Books bitmasks, greedy, math	1100	x15775
1840B	Binary Cafe bitmasks, combinatorics, math	1100	x21585
1829H	Don't Blame Me bitmasks, combinatorics, dp, math	1700	x7138
1829C	Mr. Perfectly Fine bitmasks, greedy, implementation	800	x27244
1807G2	Subsequence Addition (Hard Version) bitmasks, dp, greedy, implementation, sortings	1100	x17806
1805A	We Need the Zero bitmasks, brute force	800	x21254
1801A	The Very Beautiful Blanket bitmasks, constructive algorithms	1600	x8149
1800F	Dasha and Nightmares bitmasks, hashing, meet-in-the-middle, strings	1900	x3712
1792D	Fixed Prefix Permutations binary search, bitmasks, data structures, hashing, math, sortings	1700	x5915
1790E	Vlad and a Pair of Numbers bitmasks, constructive algorithms	1400	x14257
1780D	Bit Guessing Game binary search, bitmasks, constructive algorithms, interactive	1800	x4671
1778C	Flexible String bitmasks, brute force, strings	1600	x7709
1777D	Score of a Tree bitmasks, combinatorics, dfs and similar, dp, math, probabilities, trees	1900	x3234
1775C	Interesting Sequence bitmasks, math	1600	x9720
1775B	Gardener and the Array bitmasks, constructive algorithms	1300	x12649
1763A	Absolute Maximization bitmasks, constructive algorithms, greedy, math	800	x15313
1760G	SlavicG's Favorite Problem bitmasks, dfs and similar, graphs	1700	x6948
1747D	Yet Another Problem binary search, bitmasks, constructive algorithms, data structures	1900	x4501
1742G	Orray bitmasks, brute force, greedy, math, sortings	1500	x9951
1732C1	Sheikh (Easy version) binary search, bitmasks, greedy, two pointers	1800	x5590
1731C	Even Subarrays bitmasks, brute force, hashing, math, number theory	1700	x9014
1726B	Mainak and Interesting Sequence bitmasks, constructive algorithms, math	1100	x14688
1722G	Even-Odd XOR bitmasks, constructive algorithms, greedy	1500	x10456
1721D	Maximum AND bitmasks, dfs and similar, divide and conquer, greedy, sortings	1800	x6339
1720D1	Xor-Subsequence (easy version) bitmasks, brute force, dp, strings, trees, two pointers	1800	x5744
1715D	2+ doors 2-sat, bitmasks, graphs, greedy	1900	x4940
1703G	Good Key, Bad Key bitmasks, brute force, dp, greedy, math	1600	x10080
1699B	Almost Ternary Matrix bitmasks, constructive algorithms, matrices	900	x19212
1698A	XOR Mixup bitmasks, brute force	800	x27951
1696A	NIT orz! bitmasks, greedy	800	x18369
1688B	Patchouli's Magical Talisman bitmasks, constructive algorithms, greedy, sortings	800	x17886
1688A	Cirno's Perfect Bitmasks Classroom bitmasks, brute force	800	x20881
1682B	AND Sorting bitmasks, constructive algorithms, sortings	1100	x17330
1680E	Moving Chips bitmasks, dp, greedy	2000	x3642
1669H	Maximal AND bitmasks, greedy, math	1300	x16549
1665D	GCD Guess bitmasks, chinese remainder theorem, constructive algorithms, games, interactive, math, number theory	2000	x3722
1661B	Getting Zero bitmasks, brute force, dfs and similar, dp, graphs, greedy, shortest paths	1300	x17054
1659B	Bit Flipping bitmasks, constructive algorithms, greedy, strings	1300	x10651
1658D1	388535 (Easy Version) bitmasks, math	1600	x8785
1646C	Factorials and Powers of Two bitmasks, brute force, constructive algorithms, dp, math	1500	x13268
1635D	Infinite Set bitmasks, dp, math, matrices, number theory, strings	1800	x6025
1635A	Min Or Sum bitmasks, greedy	800	x22182
1634B	Fortune Telling bitmasks, math	1400	x15738
1632C	Strange Test binary search, bitmasks, brute force, dp, math	1600	x12288
1632B	Roof Construction bitmasks, constructive algorithms	1000	x20976
1630A	And Matching bitmasks, constructive algorithms	1500	x14112
1625A	Ancient Civilization bitmasks, greedy, math	800	x16971
1624G	MinOr Tree bitmasks, dfs and similar, dsu, graphs, greedy	1900	x5571
1618F	Reverse bitmasks, constructive algorithms, dfs and similar, implementation, math, strings	2000	x4049
1615B	And It's Non-Zero bitmasks, greedy, math	1300	x15263
1614C	Divan and bitwise operations bitmasks, combinatorics, constructive algorithms, dp, math	1500	x9941
1601A	Array Elimination bitmasks, greedy, math, number theory	1300	x13335
1600J	Robot Factory bitmasks, dfs and similar	1400	x3786
1594B	Special Numbers bitmasks, math	1100	x18982
1592C	Bakry and Partitioning bitmasks, constructive algorithms, dfs and similar, dp, graphs, trees	1700	x7640
1582F1	Korney Korneevich and XOR (easy version) bitmasks, dp, greedy	1800	x5278
1571E	Fix the String *special problem, bitmasks, dp, greedy	1700	x325
1567C	Carrying Conundrum bitmasks, combinatorics, dp, math	1600	x11867
1567B	MEXor Mixup bitmasks, greedy	1000	x21607
1566C	MAX-MEX Cut bitmasks, constructive algorithms, dp, greedy	1000	x17056

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