Problemset - Codeforces

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Codeforces Round 977 (Div. 2, based on COMPFEST 16 - Final Round)
00:05:32

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bitmasks

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Problems

#	Name
2020E	Expected Power bitmasks, dp, math, probabilities	2000	x2291
2020C	Bitwise Balancing bitmasks, implementation, math	1400	x9623
2020A	Find Minimum Operations bitmasks, brute force, greedy, math	800	x18386
2009F	Firefly's Queries bitmasks, data structures, flows, math	1700	x5915
1994E	Wooden Game bitmasks, greedy, math, trees	2000	x4321
1994B	Fun Game bitmasks, constructive algorithms, greedy, math	1100	x16132
1991D	Prime XOR Coloring bitmasks, constructive algorithms, graphs, greedy, math, number theory	1900	x6389
1991B	AND Reconstruction bitmasks, constructive algorithms, greedy	1100	x15851
1990D	Grid Puzzle bitmasks, brute force, dp, greedy, implementation	1800	x6063
1988C	Increasing Sequence with Fixed OR bitmasks, constructive algorithms, greedy	1300	x16038
1981C	Turtle and an Incomplete Sequence bitmasks, brute force, constructive algorithms, greedy, implementation, math	1800	x5178
1981B	Turtle and an Infinite Sequence bitmasks, math	1300	x13420
1979D	Fixing a Binary String bitmasks, brute force, constructive algorithms, dp, greedy, hashing, strings	1800	x6448
1979B	XOR Sequences bitmasks, greedy	1000	x22128
1977B	Binary Colouring bitmasks, constructive algorithms, greedy, math	1100	x17382
1973B	Cat, Fox and the Lonely Array binary search, bitmasks, data structures, greedy, math, two pointers	1300	x13734
1965B	Missing Subsequence Sum bitmasks, constructive algorithms, greedy, number theory	1800	x6571
1957D	A BIT of an Inequality bitmasks, brute force, dp, math	1900	x4412
1957B	A BIT of a Construction bitmasks, constructive algorithms, greedy, implementation	1100	x17700
1956D	Nene and the Mex Operator bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math	2000	x3850
1950G	Shuffling Songs bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings	1900	x4279
1950F	0, 1, 2, Tree! bitmasks, brute force, greedy, implementation, trees	1700	x9001
1946D	Birthday Gift bitmasks, brute force, constructive algorithms, greedy, implementation	1900	x4656
1944B	Equal XOR bitmasks, constructive algorithms	1100	x16055
1936A	Bitwise Operation Wizard bitmasks, constructive algorithms, greedy, interactive, math	1700	x7378
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x11783
1926D	Vlad and Division bitmasks, greedy	1300	x15391
1922E	Increasing Subsequences bitmasks, constructive algorithms, divide and conquer, greedy, math	1800	x7657
1918C	XOR-distance bitmasks, greedy, implementation, math	1400	x13899
1915B	Not Quite Latin Square bitmasks, brute force, implementation	800	x41931
1915A	Odd One Out bitmasks, implementation	800	x56747
1913C	Game with Multiset binary search, bitmasks, brute force, greedy	1300	x14941
1912K	Kim's Quest bitmasks, combinatorics, dp	1800	x2433
1909B	Make Almost Equal With Mod bitmasks, constructive algorithms, math, number theory	1200	x16876
1903D1	Maximum And Queries (easy version) binary search, bitmasks, brute force, greedy	1700	x5682
1903B	StORage room bitmasks, brute force, constructive algorithms, greedy	1200	x12745
1900D	Small GCD bitmasks, brute force, dp, math, number theory	2000	x4173
1895D	XOR Construction bitmasks, constructive algorithms, data structures, math, string suffix structures, trees	1900	x6043
1883E	Look Back bitmasks, greedy	1700	x8083
1882D	Tree XOR bitmasks, dfs and similar, dp, greedy, trees	1900	x5454
1882B	Sets and Union bitmasks, brute force, constructive algorithms, greedy	1300	x15392
1879D	Sum of XOR Functions bitmasks, combinatorics, divide and conquer, dp, math	1700	x7380
1878E	Iva & Pav binary search, bitmasks, data structures, greedy	1400	x12784
1875C	Jellyfish and Green Apple bitmasks, greedy, math, number theory	1400	x11719
1872E	Data Structures Fan binary search, bitmasks, data structures, dp	1500	x13558
1870B	Friendly Arrays bitmasks, greedy, math	1200	x14153
1868B1	Candy Party (Easy Version) bitmasks, constructive algorithms, graphs, greedy, implementation, math	1700	x6968
1867B	XOR Palindromes bitmasks, constructive algorithms, strings	1100	x16731
1864C	Divisor Chain bitmasks, constructive algorithms, math, number theory	1300	x13488
1862F	Magic Will Save the World binary search, bitmasks, brute force, dp	1800	x6249
1851F	Lisa and the Martians bitmasks, greedy, math, strings, trees	1800	x5833
1847C	Vampiric Powers, anyone? bitmasks, brute force, dp, greedy	1400	x12882
1847B	Hamon Odyssey bitmasks, greedy, two pointers	1000	x19983
1846G	Rudolf and CodeVid-23 bitmasks, dp, graphs, greedy, shortest paths	1900	x4387
1843C	Sum in Binary Tree bitmasks, combinatorics, math, trees	800	x33029
1842B	Tenzing and Books bitmasks, greedy, math	1100	x17083
1840B	Binary Cafe bitmasks, combinatorics, math	1100	x22446
1829H	Don't Blame Me bitmasks, combinatorics, dp, math	1700	x7746
1829C	Mr. Perfectly Fine bitmasks, greedy, implementation	800	x28516
1807G2	Subsequence Addition (Hard Version) bitmasks, dp, greedy, implementation, sortings	1100	x19323
1805A	We Need the Zero bitmasks, brute force	800	x23528
1801A	The Very Beautiful Blanket bitmasks, constructive algorithms	1600	x8569
1800F	Dasha and Nightmares bitmasks, hashing, meet-in-the-middle, strings	1900	x3890
1792D	Fixed Prefix Permutations binary search, bitmasks, data structures, hashing, math, sortings	1700	x6261
1790E	Vlad and a Pair of Numbers bitmasks, constructive algorithms	1400	x15125
1780D	Bit Guessing Game binary search, bitmasks, constructive algorithms, interactive	1800	x4945
1778C	Flexible String bitmasks, brute force, strings	1600	x8226
1777D	Score of a Tree bitmasks, combinatorics, dfs and similar, dp, math, probabilities, trees	1900	x3485
1775C	Interesting Sequence bitmasks, math	1600	x10460
1775B	Gardener and the Array bitmasks, constructive algorithms	1300	x13893
1763A	Absolute Maximization bitmasks, constructive algorithms, greedy, math	800	x15673
1760G	SlavicG's Favorite Problem bitmasks, dfs and similar, graphs	1700	x7350
1747D	Yet Another Problem binary search, bitmasks, constructive algorithms, data structures	1900	x4661
1742G	Orray bitmasks, brute force, greedy, math, sortings	1500	x10741
1732C1	Sheikh (Easy version) binary search, bitmasks, greedy, two pointers	1800	x5902
1731C	Even Subarrays bitmasks, brute force, hashing, math, number theory	1700	x9540
1726B	Mainak and Interesting Sequence bitmasks, constructive algorithms, math	1100	x15155
1722G	Even-Odd XOR bitmasks, constructive algorithms, greedy	1500	x11310
1721D	Maximum AND bitmasks, dfs and similar, divide and conquer, greedy, sortings	1800	x6624
1720D1	Xor-Subsequence (easy version) bitmasks, brute force, dp, strings, trees, two pointers	1800	x5995
1715D	2+ doors 2-sat, bitmasks, graphs, greedy	1900	x5143
1703G	Good Key, Bad Key bitmasks, brute force, dp, greedy, math	1600	x10674
1699B	Almost Ternary Matrix bitmasks, constructive algorithms, matrices	900	x19740
1698A	XOR Mixup bitmasks, brute force	800	x29033
1696A	NIT orz! bitmasks, greedy	800	x18770
1688B	Patchouli's Magical Talisman bitmasks, constructive algorithms, greedy, sortings	800	x18263
1688A	Cirno's Perfect Bitmasks Classroom bitmasks, brute force	800	x21615
1682B	AND Sorting bitmasks, constructive algorithms, sortings	1100	x18569
1680E	Moving Chips bitmasks, dp, greedy	2000	x3791
1669H	Maximal AND bitmasks, greedy, math	1300	x18606
1665D	GCD Guess bitmasks, chinese remainder theorem, constructive algorithms, games, interactive, math, number theory	2000	x3958
1661B	Getting Zero bitmasks, brute force, dfs and similar, dp, graphs, greedy, shortest paths	1300	x17726
1659B	Bit Flipping bitmasks, constructive algorithms, greedy, strings	1300	x10931
1658D1	388535 (Easy Version) bitmasks, math	1600	x9072
1646C	Factorials and Powers of Two bitmasks, brute force, constructive algorithms, dp, math	1500	x14122
1635D	Infinite Set bitmasks, dp, math, matrices, number theory, strings	1800	x6254
1635A	Min Or Sum bitmasks, greedy	800	x22911
1634B	Fortune Telling bitmasks, math	1400	x16607
1632C	Strange Test binary search, bitmasks, brute force, dp, math	1600	x12728
1632B	Roof Construction bitmasks, constructive algorithms	1000	x22303

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