Problemset - Codeforces

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Rayan Programming Contest 2024 - Selection (Codeforces Round, Div. 1 + Div. 2)
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bitmasks

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Problems

#	Name
2041C	Cube bitmasks, dp	2000	x644
2039C2	Shohag Loves XOR (Hard Version) bitmasks, brute force, math, number theory	1800	x2933
2039C1	Shohag Loves XOR (Easy Version) bitmasks, brute force, math, number theory	1200	x7240
2037G	Natlan Exploring bitmasks, combinatorics, data structures, dp, math, number theory	2000	x2002
2036F	XORificator 3000 bitmasks, dp, number theory, two pointers	1900	x3347
2035C	Alya and Permutation bitmasks, constructive algorithms, math	1400	x7974
2020E	Expected Power bitmasks, dp, math, probabilities	2000	x2999
2020C	Bitwise Balancing bitmasks, hashing, implementation, math, schedules, ternary search	1400	x14407
2020A	Find Minimum Operations bitmasks, brute force, greedy, math, number theory	800	x21876
2009F	Firefly's Queries bitmasks, data structures, flows, math	1700	x6533
1994E	Wooden Game bitmasks, greedy, math, trees	2000	x4531
1994B	Fun Game bitmasks, constructive algorithms, greedy, math	1100	x16591
1991D	Prime XOR Coloring bitmasks, constructive algorithms, graphs, greedy, math, number theory	1900	x6688
1991B	AND Reconstruction bitmasks, constructive algorithms, greedy	1100	x16415
1990D	Grid Puzzle bitmasks, brute force, dp, greedy, implementation	1800	x6340
1988C	Increasing Sequence with Fixed OR bitmasks, constructive algorithms, greedy	1300	x16645
1981C	Turtle and an Incomplete Sequence bitmasks, brute force, constructive algorithms, greedy, implementation, math	1800	x5375
1981B	Turtle and an Infinite Sequence bitmasks, math	1300	x13786
1979D	Fixing a Binary String bitmasks, brute force, constructive algorithms, dp, greedy, hashing, strings	1800	x6675
1979B	XOR Sequences bitmasks, greedy	1000	x22693
1977B	Binary Colouring bitmasks, constructive algorithms, greedy, math	1100	x17701
1973B	Cat, Fox and the Lonely Array binary search, bitmasks, data structures, greedy, math, two pointers	1300	x14177
1965B	Missing Subsequence Sum bitmasks, constructive algorithms, greedy, number theory	1800	x6783
1957D	A BIT of an Inequality bitmasks, brute force, dp, math	1900	x4554
1957B	A BIT of a Construction bitmasks, constructive algorithms, greedy, implementation	1100	x18030
1956D	Nene and the Mex Operator bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math	2000	x3958
1950G	Shuffling Songs bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings	1900	x4440
1950F	0, 1, 2, Tree! bitmasks, brute force, greedy, implementation, trees	1700	x9252
1946D	Birthday Gift bitmasks, brute force, constructive algorithms, greedy, implementation	1900	x4778
1944B	Equal XOR bitmasks, constructive algorithms	1100	x16305
1936A	Bitwise Operation Wizard bitmasks, constructive algorithms, greedy, interactive, math	1700	x7536
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x12109
1926D	Vlad and Division bitmasks, greedy	1300	x15751
1922E	Increasing Subsequences bitmasks, constructive algorithms, divide and conquer, greedy, math	1800	x7819
1918C	XOR-distance bitmasks, greedy, implementation, math	1400	x14228
1915B	Not Quite Latin Square bitmasks, brute force, implementation	800	x42908
1915A	Odd One Out bitmasks, implementation	800	x58912
1913C	Game with Multiset binary search, bitmasks, brute force, greedy	1300	x15222
1912K	Kim's Quest bitmasks, combinatorics, dp	1800	x2585
1909B	Make Almost Equal With Mod bitmasks, constructive algorithms, math, number theory	1200	x17509
1903D1	Maximum And Queries (easy version) binary search, bitmasks, brute force, greedy	1700	x5837
1903B	StORage room bitmasks, brute force, constructive algorithms, greedy	1200	x12973
1900D	Small GCD bitmasks, brute force, dp, math, number theory	2000	x4327
1895D	XOR Construction bitmasks, constructive algorithms, data structures, math, string suffix structures, trees	1900	x6145
1883E	Look Back bitmasks, greedy	1700	x8253
1882D	Tree XOR bitmasks, dfs and similar, dp, greedy, trees	1900	x5605
1882B	Sets and Union bitmasks, brute force, constructive algorithms, greedy	1300	x15622
1879D	Sum of XOR Functions bitmasks, combinatorics, divide and conquer, dp, math	1700	x7581
1878E	Iva & Pav binary search, bitmasks, data structures, greedy	1400	x13200
1875C	Jellyfish and Green Apple bitmasks, greedy, math, number theory	1400	x11922
1872E	Data Structures Fan binary search, bitmasks, data structures, dp	1500	x14005
1870B	Friendly Arrays bitmasks, greedy, math	1200	x14322
1868B1	Candy Party (Easy Version) bitmasks, constructive algorithms, graphs, greedy, implementation, math	1700	x7098
1867B	XOR Palindromes bitmasks, constructive algorithms, strings	1100	x16884
1864C	Divisor Chain bitmasks, constructive algorithms, math, number theory	1300	x13662
1862F	Magic Will Save the World binary search, bitmasks, brute force, dp	1800	x6382
1851F	Lisa and the Martians bitmasks, greedy, math, strings, trees	1800	x5964
1847C	Vampiric Powers, anyone? bitmasks, brute force, dp, greedy	1400	x13022
1847B	Hamon Odyssey bitmasks, greedy, two pointers	1000	x20184
1846G	Rudolf and CodeVid-23 bitmasks, dp, graphs, greedy, shortest paths	1900	x4477
1843C	Sum in Binary Tree bitmasks, combinatorics, math, trees	800	x33716
1842B	Tenzing and Books bitmasks, greedy, math	1100	x17431
1840B	Binary Cafe bitmasks, combinatorics, math	1100	x22620
1829H	Don't Blame Me bitmasks, combinatorics, dp, math	1700	x7909
1829C	Mr. Perfectly Fine bitmasks, greedy, implementation	800	x28927
1807G2	Subsequence Addition (Hard Version) bitmasks, dp, greedy, implementation, sortings	1100	x19749
1805A	We Need the Zero bitmasks, brute force	800	x24336
1801A	The Very Beautiful Blanket bitmasks, constructive algorithms	1600	x8675
1800F	Dasha and Nightmares bitmasks, hashing, meet-in-the-middle, strings	1900	x3967
1792D	Fixed Prefix Permutations binary search, bitmasks, data structures, hashing, math, sortings	1700	x6336
1790E	Vlad and a Pair of Numbers bitmasks, constructive algorithms	1400	x15347
1780D	Bit Guessing Game binary search, bitmasks, constructive algorithms, interactive	1800	x5012
1778C	Flexible String bitmasks, brute force, strings	1600	x8370
1777D	Score of a Tree bitmasks, combinatorics, dfs and similar, dp, math, probabilities, trees	1900	x3561
1775C	Interesting Sequence bitmasks, math	1600	x10664
1775B	Gardener and the Array bitmasks, constructive algorithms	1300	x14181
1763A	Absolute Maximization bitmasks, constructive algorithms, greedy, math	800	x15774
1760G	SlavicG's Favorite Problem bitmasks, dfs and similar, graphs	1700	x7461
1747D	Yet Another Problem binary search, bitmasks, constructive algorithms, data structures	1900	x4726
1742G	Orray bitmasks, brute force, greedy, math, sortings	1500	x10932
1732C1	Sheikh (Easy version) binary search, bitmasks, greedy, two pointers	1800	x5997
1731C	Even Subarrays bitmasks, brute force, hashing, math, number theory	1700	x9725
1726B	Mainak and Interesting Sequence bitmasks, constructive algorithms, math	1100	x15240
1722G	Even-Odd XOR bitmasks, constructive algorithms, greedy	1500	x11503
1721D	Maximum AND bitmasks, dfs and similar, divide and conquer, greedy, sortings	1800	x6728
1720D1	Xor-Subsequence (easy version) bitmasks, brute force, dp, strings, trees, two pointers	1800	x6067
1715D	2+ doors 2-sat, bitmasks, graphs, greedy	1900	x5206
1703G	Good Key, Bad Key bitmasks, brute force, dp, greedy, math	1600	x10856
1699B	Almost Ternary Matrix bitmasks, constructive algorithms, matrices	900	x19901
1698A	XOR Mixup bitmasks, brute force	800	x29431
1696A	NIT orz! bitmasks, greedy	800	x18895
1688B	Patchouli's Magical Talisman bitmasks, constructive algorithms, greedy, sortings	800	x18339
1688A	Cirno's Perfect Bitmasks Classroom bitmasks, brute force	800	x21792
1682B	AND Sorting bitmasks, constructive algorithms, sortings	1100	x18919
1680E	Moving Chips bitmasks, dp, greedy	2000	x3826
1669H	Maximal AND bitmasks, greedy, math	1300	x19124
1665D	GCD Guess bitmasks, chinese remainder theorem, constructive algorithms, games, interactive, math, number theory	2000	x4032
1661B	Getting Zero bitmasks, brute force, dfs and similar, dp, graphs, greedy, shortest paths	1300	x18014
1659B	Bit Flipping bitmasks, constructive algorithms, greedy, strings	1300	x11007
1658D1	388535 (Easy Version) bitmasks, math	1600	x9169

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