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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		x9891
1970G3	Min-Fund Prison (Hard) bitmasks, dfs and similar, dp, graphs, trees	2400	x185
1967C	Fenwick Tree bitmasks, brute force, combinatorics, data structures, dp, math, trees	2300	x1296
1965B	Missing Subsequence Sum bitmasks, constructive algorithms, greedy, number theory	1800	x5182
1957D	A BIT of an Inequality bitmasks, brute force, dp, math	1900	x3702
1957B	A BIT of a Construction bitmasks, constructive algorithms, greedy, implementation	1100	x15268
1956D	Nene and the Mex Operator bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math	2000	x3283
1955H	The Most Reckless Defense bitmasks, brute force, constructive algorithms, dp, flows, graph matchings, shortest paths	2300	x1044
1952I	Dark Matter bitmasks, geometry		x356
1950G	Shuffling Songs bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings	1900	x3560
1950F	0, 1, 2, Tree! bitmasks, brute force, greedy, implementation, trees	1700	x7724
1948G	MST with Matching bitmasks, brute force, dsu, graph matchings, trees	3100	x619
1946D	Birthday Gift bitmasks, brute force, constructive algorithms, greedy, implementation	1900	x4082
1944B	Equal XOR bitmasks, constructive algorithms	1100	x14413
1936D	Bitwise Paradox binary search, bitmasks, data structures, greedy, two pointers	3100	x419
1936A	Bitwise Operation Wizard bitmasks, constructive algorithms, greedy, interactive, math	1700	x6619
1935E	Distance Learning Courses in MAC bitmasks, brute force, data structures, greedy, math	2400	x1177
1934D2	XOR Break --- Game Version bitmasks, games, greedy, interactive	2400	x1208
1934D1	XOR Break --- Solo Version bitmasks, constructive algorithms, greedy	2100	x3101
1933G	Turtle Magic: Royal Turtle Shell Pattern bitmasks, brute force, combinatorics, constructive algorithms, dfs and similar, math	2300	x878
1930F	Maximize the Difference bitmasks, brute force, dfs and similar	2700	x616
1930D2	Sum over all Substrings (Hard Version) bitmasks, divide and conquer, dp, dsu, greedy, implementation, strings	2100	x2379
1929E	Sasha and the Happy Tree Cutting bitmasks, brute force, dfs and similar, dp, graphs, greedy, math, trees	2300	x1518
1926F	Vlad and Avoiding X bitmasks, brute force, dfs and similar, dp, implementation	2200	x1509
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x10170
1926D	Vlad and Division bitmasks, greedy	1300	x13735
1922E	Increasing Subsequences bitmasks, constructive algorithms, divide and conquer, greedy, math	1800	x7085
1918C	XOR-distance bitmasks, greedy, implementation, math	1400	x12649
1917F	Construct Tree bitmasks, constructive algorithms, dp, trees	2500	x901
1915B	Not Quite Latin Square bitmasks, brute force, implementation	800	x38808
1915A	Odd One Out bitmasks, implementation	800	x50227
1913C	Game with Multiset binary search, bitmasks, brute force, greedy	1300	x13765
1912K	Kim's Quest bitmasks, combinatorics, dp	1800	x2066
1909E	Multiple Lamps bitmasks, brute force, constructive algorithms, math, number theory	2400	x1259
1909B	Make Almost Equal With Mod bitmasks, constructive algorithms, math, number theory	1200	x14067
1906B	Button Pressing bitmasks, constructive algorithms, hashing	2600	x456
1903D2	Maximum And Queries (hard version) bitmasks, divide and conquer, dp, greedy	2500	x712
1903D1	Maximum And Queries (easy version) binary search, bitmasks, brute force, greedy	1700	x5129
1903B	StORage room bitmasks, brute force, constructive algorithms, greedy	1200	x11477
1900D	Small GCD bitmasks, brute force, dp, math, number theory	2000	x3738
1895D	XOR Construction bitmasks, constructive algorithms, data structures, math, string suffix structures, trees	1900	x5598
1886E	I Wanna be the Team Leader bitmasks, constructive algorithms, dp, greedy, math, sortings, two pointers	2400	x1339
1883E	Look Back bitmasks, greedy	1700	x7109
1882D	Tree XOR bitmasks, dfs and similar, dp, greedy, trees	1900	x5000
1882B	Sets and Union bitmasks, brute force, constructive algorithms, greedy	1300	x14352
1879D	Sum of XOR Functions bitmasks, combinatorics, divide and conquer, dp, math	1700	x6636
1878G	wxhtzdy ORO Tree binary search, bitmasks, brute force, data structures, dfs and similar, implementation, trees	2300	x1099
1878E	Iva & Pav binary search, bitmasks, data structures, greedy	1400	x11204
1875C	Jellyfish and Green Apple bitmasks, greedy, math, number theory	1400	x10844
1874B	Jellyfish and Math bitmasks, brute force, dfs and similar, dp, graphs, shortest paths	2400	x1069
1872E	Data Structures Fan binary search, bitmasks, data structures, dp	1500	x12122
1870E	Another MEX Problem bitmasks, brute force, dp, shortest paths	2300	x2216
1870B	Friendly Arrays bitmasks, greedy, math	1200	x13387
1868B2	Candy Party (Hard Version) bitmasks, constructive algorithms, dp, greedy, implementation, math	2100	x2281
1868B1	Candy Party (Easy Version) bitmasks, constructive algorithms, graphs, greedy, implementation, math	1700	x6489
1867B	XOR Palindromes bitmasks, constructive algorithms, strings	1100	x15903
1864E	Guess Game bitmasks, data structures, games, math, probabilities, sortings, strings, trees	2100	x2471
1864C	Divisor Chain bitmasks, constructive algorithms, math, number theory	1300	x12657
1863F	Divide, XOR, and Conquer bitmasks, dp, math	2600	x1031
1862F	Magic Will Save the World binary search, bitmasks, brute force, dp	1800	x5720
1861F	Four Suits binary search, bitmasks, flows, greedy	3200	x147
1856E2	PermuTree (hard version) bitmasks, dfs and similar, dp, fft, greedy, implementation, math, trees	2700	x1317
1854B	Earn or Unlock bitmasks, brute force, dp	2200	x3356
1851F	Lisa and the Martians bitmasks, greedy, math, strings, trees	1800	x5331
1849F	XOR Partition binary search, bitmasks, data structures, divide and conquer, greedy, trees	2700	x658
1848F	Vika and Wiki binary search, bitmasks, combinatorics, divide and conquer, dp, math	2400	x1454
1847F	The Boss's Identity binary search, bitmasks, data structures, dfs and similar, greedy, math, sortings	2500	x858
1847C	Vampiric Powers, anyone? bitmasks, brute force, dp, greedy	1400	x12262
1847B	Hamon Odyssey bitmasks, greedy, two pointers	1000	x19155
1846G	Rudolf and CodeVid-23 bitmasks, dp, graphs, greedy, shortest paths	1900	x4069
1844G	Tree Weights bitmasks, constructive algorithms, data structures, dfs and similar, implementation, math, matrices, number theory, trees	3000	x645
1843C	Sum in Binary Tree bitmasks, combinatorics, math, trees	800	x31214
1842H	Tenzing and Random Real Numbers bitmasks, dp, graphs, math, probabilities	3000	x564
1842B	Tenzing and Books bitmasks, greedy, math	1100	x15747
1840B	Binary Cafe bitmasks, combinatorics, math	1100	x21572
1835F	Good Graph bitmasks, dfs and similar, graph matchings, graphs, implementation	3500	x144
1835C	Twin Clusters bitmasks, brute force, constructive algorithms, math, probabilities	2600	x940
1829H	Don't Blame Me bitmasks, combinatorics, dp, math	1700	x7132
1829C	Mr. Perfectly Fine bitmasks, greedy, implementation	800	x27227
1826E	Walk the Runway bitmasks, brute force, data structures, dp, graphs, implementation, sortings	2400	x1508
1815D	XOR Counting bitmasks, combinatorics, dp, math	2600	x1047
1807G2	Subsequence Addition (Hard Version) bitmasks, dp, greedy, implementation, sortings	1100	x17787
1805A	We Need the Zero bitmasks, brute force	800	x21215
1804H	Code Lock bitmasks, dp	3300	x169
1804E	Routing bitmasks, brute force, dfs and similar, dp, graphs	2400	x1367
1801A	The Very Beautiful Blanket bitmasks, constructive algorithms	1600	x8139
1800F	Dasha and Nightmares bitmasks, hashing, meet-in-the-middle, strings	1900	x3710
1799H	Tree Cutting bitmasks, dfs and similar, dp	3200	x271
1795G	Removal Sequences bitmasks, dfs and similar, graphs	2700	x655
1792D	Fixed Prefix Permutations binary search, bitmasks, data structures, hashing, math, sortings	1700	x5911
1790E	Vlad and a Pair of Numbers bitmasks, constructive algorithms	1400	x14243
1789F	Serval and Brain Power bitmasks, brute force, dp, greedy, implementation, strings	2700	x521
1789D	Serval and Shift-Shift-Shift bitmasks, brute force, constructive algorithms, implementation	2200	x1580
1788F	XOR, Tree, and Queries bitmasks, constructive algorithms, dfs and similar, dsu, graphs, greedy, implementation, trees	2500	x796
1787E	The Harmonization of XOR bitmasks, constructive algorithms, greedy, math	2100	x2188
1780F	Three Chairs bitmasks, brute force, combinatorics, data structures, dp, number theory, sortings	2300	x1381
1780D	Bit Guessing Game binary search, bitmasks, constructive algorithms, interactive	1800	x4662
1779F	Xorcerer's Stones bitmasks, constructive algorithms, dp, trees	2500	x1222
1778E	The Tree Has Fallen! bitmasks, dfs and similar, math, trees	2500	x824
1778C	Flexible String bitmasks, brute force, strings	1600	x7702

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