Problemset - Codeforces

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Codeforces Round 961 (Div. 2)
15:23:32
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bitmasks

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Problems

#	Name
1988C	Increasing Sequence with Fixed OR bitmasks, constructive algorithms, greedy	1300	x13290
1981C	Turtle and an Incomplete Sequence bitmasks, brute force, constructive algorithms, greedy, implementation, math	1800	x4570
1981B	Turtle and an Infinite Sequence bitmasks, math	1300	x12285
1979D	Fixing a Binary String bitmasks, brute force, constructive algorithms, dp, greedy, hashing, strings	1800	x5842
1979B	XOR Sequences bitmasks, greedy	1000	x20856
1977B	Binary Colouring bitmasks, constructive algorithms, greedy, math	1100	x16389
1973B	Cat, Fox and the Lonely Array binary search, bitmasks, data structures, greedy, math, two pointers	1300	x12834
1965B	Missing Subsequence Sum bitmasks, constructive algorithms, greedy, number theory	1800	x6039
1957D	A BIT of an Inequality bitmasks, brute force, dp, math	1900	x4137
1957B	A BIT of a Construction bitmasks, constructive algorithms, greedy, implementation	1100	x16913
1956D	Nene and the Mex Operator bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math	2000	x3596
1950G	Shuffling Songs bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings	1900	x3980
1950F	0, 1, 2, Tree! bitmasks, brute force, greedy, implementation, trees	1700	x8458
1946D	Birthday Gift bitmasks, brute force, constructive algorithms, greedy, implementation	1900	x4384
1944B	Equal XOR bitmasks, constructive algorithms	1100	x15437
1936A	Bitwise Operation Wizard bitmasks, constructive algorithms, greedy, interactive, math	1700	x6987
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x11111
1926D	Vlad and Division bitmasks, greedy	1300	x14651
1922E	Increasing Subsequences bitmasks, constructive algorithms, divide and conquer, greedy, math	1800	x7356
1918C	XOR-distance bitmasks, greedy, implementation, math	1400	x13317
1915B	Not Quite Latin Square bitmasks, brute force, implementation	800	x40388
1915A	Odd One Out bitmasks, implementation	800	x53149
1913C	Game with Multiset binary search, bitmasks, brute force, greedy	1300	x14349
1912K	Kim's Quest bitmasks, combinatorics, dp	1800	x2229
1909B	Make Almost Equal With Mod bitmasks, constructive algorithms, math, number theory	1200	x15432
1903D1	Maximum And Queries (easy version) binary search, bitmasks, brute force, greedy	1700	x5380
1903B	StORage room bitmasks, brute force, constructive algorithms, greedy	1200	x12103
1900D	Small GCD bitmasks, brute force, dp, math, number theory	2000	x3946
1895D	XOR Construction bitmasks, constructive algorithms, data structures, math, string suffix structures, trees	1900	x5802
1883E	Look Back bitmasks, greedy	1700	x7599
1882D	Tree XOR bitmasks, dfs and similar, dp, greedy, trees	1900	x5204
1882B	Sets and Union bitmasks, brute force, constructive algorithms, greedy	1300	x14980
1879D	Sum of XOR Functions bitmasks, combinatorics, divide and conquer, dp, math	1700	x7029
1878E	Iva & Pav binary search, bitmasks, data structures, greedy	1400	x11963
1875C	Jellyfish and Green Apple bitmasks, greedy, math, number theory	1400	x11276
1872E	Data Structures Fan binary search, bitmasks, data structures, dp	1500	x12824
1870B	Friendly Arrays bitmasks, greedy, math	1200	x13853
1868B1	Candy Party (Easy Version) bitmasks, constructive algorithms, graphs, greedy, implementation, math	1700	x6752
1867B	XOR Palindromes bitmasks, constructive algorithms, strings	1100	x16404
1864C	Divisor Chain bitmasks, constructive algorithms, math, number theory	1300	x13083
1862F	Magic Will Save the World binary search, bitmasks, brute force, dp	1800	x5995
1851F	Lisa and the Martians bitmasks, greedy, math, strings, trees	1800	x5581
1847C	Vampiric Powers, anyone? bitmasks, brute force, dp, greedy	1400	x12566
1847B	Hamon Odyssey bitmasks, greedy, two pointers	1000	x19624
1846G	Rudolf and CodeVid-23 bitmasks, dp, graphs, greedy, shortest paths	1900	x4234
1843C	Sum in Binary Tree bitmasks, combinatorics, math, trees	800	x32161
1842B	Tenzing and Books bitmasks, greedy, math	1100	x16426
1840B	Binary Cafe bitmasks, combinatorics, math	1100	x22056
1829H	Don't Blame Me bitmasks, combinatorics, dp, math	1700	x7446
1829C	Mr. Perfectly Fine bitmasks, greedy, implementation	800	x27869
1807G2	Subsequence Addition (Hard Version) bitmasks, dp, greedy, implementation, sortings	1100	x18486
1805A	We Need the Zero bitmasks, brute force	800	x22183
1801A	The Very Beautiful Blanket bitmasks, constructive algorithms	1600	x8371
1800F	Dasha and Nightmares bitmasks, hashing, meet-in-the-middle, strings	1900	x3794
1792D	Fixed Prefix Permutations binary search, bitmasks, data structures, hashing, math, sortings	1700	x6061
1790E	Vlad and a Pair of Numbers bitmasks, constructive algorithms	1400	x14679
1780D	Bit Guessing Game binary search, bitmasks, constructive algorithms, interactive	1800	x4788
1778C	Flexible String bitmasks, brute force, strings	1600	x7962
1777D	Score of a Tree bitmasks, combinatorics, dfs and similar, dp, math, probabilities, trees	1900	x3373
1775C	Interesting Sequence bitmasks, math	1600	x10104
1775B	Gardener and the Array bitmasks, constructive algorithms	1300	x13292
1763A	Absolute Maximization bitmasks, constructive algorithms, greedy, math	800	x15542
1760G	SlavicG's Favorite Problem bitmasks, dfs and similar, graphs	1700	x7151
1747D	Yet Another Problem binary search, bitmasks, constructive algorithms, data structures	1900	x4575
1742G	Orray bitmasks, brute force, greedy, math, sortings	1500	x10345
1732C1	Sheikh (Easy version) binary search, bitmasks, greedy, two pointers	1800	x5733
1731C	Even Subarrays bitmasks, brute force, hashing, math, number theory	1700	x9268
1726B	Mainak and Interesting Sequence bitmasks, constructive algorithms, math	1100	x14916
1722G	Even-Odd XOR bitmasks, constructive algorithms, greedy	1500	x10874
1721D	Maximum AND bitmasks, dfs and similar, divide and conquer, greedy, sortings	1800	x6492
1720D1	Xor-Subsequence (easy version) bitmasks, brute force, dp, strings, trees, two pointers	1800	x5850
1715D	2+ doors 2-sat, bitmasks, graphs, greedy	1900	x5034
1703G	Good Key, Bad Key bitmasks, brute force, dp, greedy, math	1600	x10362
1699B	Almost Ternary Matrix bitmasks, constructive algorithms, matrices	900	x19438
1698A	XOR Mixup bitmasks, brute force	800	x28528
1696A	NIT orz! bitmasks, greedy	800	x18590
1688B	Patchouli's Magical Talisman bitmasks, constructive algorithms, greedy, sortings	800	x18059
1688A	Cirno's Perfect Bitmasks Classroom bitmasks, brute force	800	x21267
1682B	AND Sorting bitmasks, constructive algorithms, sortings	1100	x17928
1680E	Moving Chips bitmasks, dp, greedy	2000	x3692
1669H	Maximal AND bitmasks, greedy, math	1300	x17544
1665D	GCD Guess bitmasks, chinese remainder theorem, constructive algorithms, games, interactive, math, number theory	2000	x3823
1661B	Getting Zero bitmasks, brute force, dfs and similar, dp, graphs, greedy, shortest paths	1300	x17381
1659B	Bit Flipping bitmasks, constructive algorithms, greedy, strings	1300	x10795
1658D1	388535 (Easy Version) bitmasks, math	1600	x8934
1646C	Factorials and Powers of Two bitmasks, brute force, constructive algorithms, dp, math	1500	x13697
1635D	Infinite Set bitmasks, dp, math, matrices, number theory, strings	1800	x6139
1635A	Min Or Sum bitmasks, greedy	800	x22630
1634B	Fortune Telling bitmasks, math	1400	x16120
1632C	Strange Test binary search, bitmasks, brute force, dp, math	1600	x12524
1632B	Roof Construction bitmasks, constructive algorithms	1000	x21626
1630A	And Matching bitmasks, constructive algorithms	1500	x14329
1625A	Ancient Civilization bitmasks, greedy, math	800	x17089
1624G	MinOr Tree bitmasks, dfs and similar, dsu, graphs, greedy	1900	x5762
1618F	Reverse bitmasks, constructive algorithms, dfs and similar, implementation, math, strings	2000	x4141
1615B	And It's Non-Zero bitmasks, greedy, math	1300	x15570
1614C	Divan and bitwise operations bitmasks, combinatorics, constructive algorithms, dp, math	1500	x10098
1601A	Array Elimination bitmasks, greedy, math, number theory	1300	x13986
1600J	Robot Factory bitmasks, dfs and similar	1400	x3837
1594B	Special Numbers bitmasks, math	1100	x19571

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