Problemset - Codeforces

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bitmasks

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Problems

#	Name
1995E2	Let Me Teach You a Lesson (Hard Version) bitmasks, data structures, dp, graphs, matrices, two pointers		x122
1995D	Cases bitmasks, brute force, dp, strings		x1225
1994G	Minecraft bitmasks, brute force, dp, graphs, math		x616
1994E	Wooden Game bitmasks, greedy, math, trees		x3040
1994B	Fun Game bitmasks, constructive algorithms, greedy, math		x13236
1990D	Grid Puzzle bitmasks, brute force, dp, greedy, implementation		x4294
1988C	Increasing Sequence with Fixed OR bitmasks, constructive algorithms, greedy	1300	x13737
1983G	Your Loss bitmasks, brute force, dp, trees	3000	x171
1983F	array-value binary search, bitmasks, data structures, greedy, two pointers	2500	x963
1982E	Number of k-good subarrays bitmasks, brute force, combinatorics, divide and conquer, dp, math, meet-in-the-middle	2300	x1359
1981C	Turtle and an Incomplete Sequence bitmasks, brute force, constructive algorithms, greedy, implementation, math	1800	x4615
1981B	Turtle and an Infinite Sequence bitmasks, math	1300	x12382
1980G	Yasya and the Mysterious Tree bitmasks, data structures, dfs and similar, graphs, greedy, strings, trees	2300	x1036
1979D	Fixing a Binary String bitmasks, brute force, constructive algorithms, dp, greedy, hashing, strings	1800	x5890
1979B	XOR Sequences bitmasks, greedy	1000	x20981
1977D	XORificator bitmasks, brute force, greedy, hashing	2300	x1627
1977B	Binary Colouring bitmasks, constructive algorithms, greedy, math	1100	x16492
1975F	Set bitmasks, brute force, combinatorics, dfs and similar, divide and conquer, dp, math	2600	x723
1973F	Maximum GCD Sum Queries bitmasks, brute force, dp, implementation, number theory	3100	x185
1973B	Cat, Fox and the Lonely Array binary search, bitmasks, data structures, greedy, math, two pointers	1300	x12900
1970G3	Min-Fund Prison (Hard) bitmasks, dfs and similar, dp, graphs, trees	2400	x275
1967C	Fenwick Tree bitmasks, brute force, combinatorics, data structures, dp, math, trees	2300	x1530
1965B	Missing Subsequence Sum bitmasks, constructive algorithms, greedy, number theory	1800	x6076
1957D	A BIT of an Inequality bitmasks, brute force, dp, math	1900	x4154
1957B	A BIT of a Construction bitmasks, constructive algorithms, greedy, implementation	1100	x16979
1956D	Nene and the Mex Operator bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math	2000	x3612
1955H	The Most Reckless Defense bitmasks, brute force, constructive algorithms, dp, flows, graph matchings, shortest paths	2300	x1162
1952I	Dark Matter bitmasks, geometry		x414
1950G	Shuffling Songs bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings	1900	x4007
1950F	0, 1, 2, Tree! bitmasks, brute force, greedy, implementation, trees	1700	x8492
1948G	MST with Matching bitmasks, brute force, dsu, graph matchings, trees	3100	x662
1946D	Birthday Gift bitmasks, brute force, constructive algorithms, greedy, implementation	1900	x4397
1944B	Equal XOR bitmasks, constructive algorithms	1100	x15475
1936D	Bitwise Paradox binary search, bitmasks, data structures, greedy, two pointers	3100	x466
1936A	Bitwise Operation Wizard bitmasks, constructive algorithms, greedy, interactive, math	1700	x7008
1935E	Distance Learning Courses in MAC bitmasks, brute force, data structures, greedy, math	2400	x1280
1934D2	XOR Break --- Game Version bitmasks, games, greedy, interactive	2400	x1282
1934D1	XOR Break --- Solo Version bitmasks, constructive algorithms, greedy	2100	x3273
1933G	Turtle Magic: Royal Turtle Shell Pattern bitmasks, brute force, combinatorics, constructive algorithms, dfs and similar, math	2300	x920
1930F	Maximize the Difference bitmasks, brute force, dfs and similar	2700	x666
1930D2	Sum over all Substrings (Hard Version) bitmasks, divide and conquer, dp, dsu, greedy, implementation, strings	2100	x2508
1929E	Sasha and the Happy Tree Cutting bitmasks, brute force, dfs and similar, dp, graphs, greedy, math, trees	2300	x1603
1926F	Vlad and Avoiding X bitmasks, brute force, dfs and similar, dp, implementation	2200	x1603
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x11149
1926D	Vlad and Division bitmasks, greedy	1300	x14690
1922E	Increasing Subsequences bitmasks, constructive algorithms, divide and conquer, greedy, math	1800	x7381
1918C	XOR-distance bitmasks, greedy, implementation, math	1400	x13350
1917F	Construct Tree bitmasks, constructive algorithms, dp, trees	2500	x932
1915B	Not Quite Latin Square bitmasks, brute force, implementation	800	x40469
1915A	Odd One Out bitmasks, implementation	800	x53292
1913C	Game with Multiset binary search, bitmasks, brute force, greedy	1300	x14377
1912K	Kim's Quest bitmasks, combinatorics, dp	1800	x2241
1909E	Multiple Lamps bitmasks, brute force, constructive algorithms, math, number theory	2400	x1313
1909B	Make Almost Equal With Mod bitmasks, constructive algorithms, math, number theory	1200	x15520
1906B	Button Pressing bitmasks, constructive algorithms, hashing	2600	x487
1903D2	Maximum And Queries (hard version) bitmasks, divide and conquer, dp, greedy	2500	x743
1903D1	Maximum And Queries (easy version) binary search, bitmasks, brute force, greedy	1700	x5392
1903B	StORage room bitmasks, brute force, constructive algorithms, greedy	1200	x12139
1900D	Small GCD bitmasks, brute force, dp, math, number theory	2000	x3955
1895D	XOR Construction bitmasks, constructive algorithms, data structures, math, string suffix structures, trees	1900	x5816
1886E	I Wanna be the Team Leader bitmasks, constructive algorithms, dp, greedy, math, sortings, two pointers	2400	x1395
1883E	Look Back bitmasks, greedy	1700	x7672
1882D	Tree XOR bitmasks, dfs and similar, dp, greedy, trees	1900	x5211
1882B	Sets and Union bitmasks, brute force, constructive algorithms, greedy	1300	x15006
1879D	Sum of XOR Functions bitmasks, combinatorics, divide and conquer, dp, math	1700	x7047
1878G	wxhtzdy ORO Tree binary search, bitmasks, brute force, data structures, dfs and similar, implementation, trees	2300	x1141
1878E	Iva & Pav binary search, bitmasks, data structures, greedy	1400	x11999
1875C	Jellyfish and Green Apple bitmasks, greedy, math, number theory	1400	x11296
1874B	Jellyfish and Math bitmasks, brute force, dfs and similar, dp, graphs, shortest paths	2400	x1114
1872E	Data Structures Fan binary search, bitmasks, data structures, dp	1500	x12864
1870E	Another MEX Problem bitmasks, brute force, dp, shortest paths	2300	x2289
1870B	Friendly Arrays bitmasks, greedy, math	1200	x13864
1868B2	Candy Party (Hard Version) bitmasks, constructive algorithms, dp, greedy, implementation, math	2100	x2345
1868B1	Candy Party (Easy Version) bitmasks, constructive algorithms, graphs, greedy, implementation, math	1700	x6764
1867B	XOR Palindromes bitmasks, constructive algorithms, strings	1100	x16428
1864E	Guess Game bitmasks, data structures, games, math, probabilities, sortings, strings, trees	2100	x2525
1864C	Divisor Chain bitmasks, constructive algorithms, math, number theory	1300	x13108
1863F	Divide, XOR, and Conquer bitmasks, dp, math	2600	x1083
1862F	Magic Will Save the World binary search, bitmasks, brute force, dp	1800	x6009
1861F	Four Suits binary search, bitmasks, flows, greedy	3200	x190
1856E2	PermuTree (hard version) bitmasks, dfs and similar, dp, fft, greedy, implementation, math, trees	2700	x1350
1854B	Earn or Unlock bitmasks, brute force, dp	2200	x3439
1851F	Lisa and the Martians bitmasks, greedy, math, strings, trees	1800	x5599
1849F	XOR Partition binary search, bitmasks, data structures, divide and conquer, greedy, trees	2700	x692
1848F	Vika and Wiki binary search, bitmasks, combinatorics, divide and conquer, dp, math	2400	x1501
1847F	The Boss's Identity binary search, bitmasks, data structures, dfs and similar, greedy, math, sortings	2500	x872
1847C	Vampiric Powers, anyone? bitmasks, brute force, dp, greedy	1400	x12580
1847B	Hamon Odyssey bitmasks, greedy, two pointers	1000	x19643
1846G	Rudolf and CodeVid-23 bitmasks, dp, graphs, greedy, shortest paths	1900	x4244
1844G	Tree Weights bitmasks, constructive algorithms, data structures, dfs and similar, implementation, math, matrices, number theory, trees	3000	x690
1843C	Sum in Binary Tree bitmasks, combinatorics, math, trees	800	x32211
1842H	Tenzing and Random Real Numbers bitmasks, dp, graphs, math, probabilities	3000	x622
1842B	Tenzing and Books bitmasks, greedy, math	1100	x16450
1840B	Binary Cafe bitmasks, combinatorics, math	1100	x22082
1835F	Good Graph bitmasks, dfs and similar, graph matchings, graphs, implementation	3500	x159
1835C	Twin Clusters bitmasks, brute force, constructive algorithms, math, probabilities	2600	x959
1829H	Don't Blame Me bitmasks, combinatorics, dp, math	1700	x7460
1829C	Mr. Perfectly Fine bitmasks, greedy, implementation	800	x27908
1826E	Walk the Runway bitmasks, brute force, data structures, dp, graphs, implementation, sortings	2400	x1562
1815D	XOR Counting bitmasks, combinatorics, dp, math	2600	x1088

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