Problemset - Codeforces

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bitmasks

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Problems

#	Name
1994G	Minecraft bitmasks, brute force, dp, math		x514
1994E	Wooden Game bitmasks, greedy, math, sortings, trees		x2705
1994B	Fun Game bitmasks, constructive algorithms, greedy, math		x12784
1990D	Grid Puzzle bitmasks, dp, greedy, math		x3038
1988C	Increasing Sequence with Fixed OR bitmasks, constructive algorithms, greedy	1300	x13057
1983G	Your Loss bitmasks, brute force, dp, trees	3000	x161
1983F	array-value binary search, bitmasks, data structures, greedy, two pointers	2500	x930
1982E	Number of k-good subarrays bitmasks, brute force, combinatorics, divide and conquer, dp, math, meet-in-the-middle	2300	x1331
1981C	Turtle and an Incomplete Sequence bitmasks, brute force, constructive algorithms, greedy, implementation, math	1800	x4546
1981B	Turtle and an Infinite Sequence bitmasks, math	1300	x12247
1980G	Yasya and the Mysterious Tree bitmasks, data structures, dfs and similar, graphs, greedy, strings, trees	2300	x1013
1979D	Fixing a Binary String bitmasks, brute force, constructive algorithms, dp, greedy, hashing, strings	1800	x5819
1979B	XOR Sequences bitmasks, greedy	1000	x20807
1977D	XORificator bitmasks, brute force, greedy, hashing	2300	x1603
1977B	Binary Colouring bitmasks, constructive algorithms, greedy, math	1100	x16353
1975F	Set bitmasks, brute force, combinatorics, dfs and similar, divide and conquer, dp, math	2600	x717
1973F	Maximum GCD Sum Queries bitmasks, brute force, dp, implementation, number theory	3100	x181
1973B	Cat, Fox and the Lonely Array binary search, bitmasks, data structures, greedy, math, two pointers	1300	x12805
1970G3	Min-Fund Prison (Hard) bitmasks, dfs and similar, dp, graphs, trees	2400	x271
1967C	Fenwick Tree bitmasks, brute force, combinatorics, data structures, dp, math, trees	2300	x1514
1965B	Missing Subsequence Sum bitmasks, constructive algorithms, greedy, number theory	1800	x6025
1957D	A BIT of an Inequality bitmasks, brute force, dp, math	1900	x4131
1957B	A BIT of a Construction bitmasks, constructive algorithms, greedy, implementation	1100	x16882
1956D	Nene and the Mex Operator bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math	2000	x3592
1955H	The Most Reckless Defense bitmasks, brute force, constructive algorithms, dp, flows, graph matchings, shortest paths	2300	x1159
1952I	Dark Matter bitmasks, geometry		x411
1950G	Shuffling Songs bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings	1900	x3972
1950F	0, 1, 2, Tree! bitmasks, brute force, greedy, implementation, trees	1700	x8439
1948G	MST with Matching bitmasks, brute force, dsu, graph matchings, trees	3100	x661
1946D	Birthday Gift bitmasks, brute force, constructive algorithms, greedy, implementation	1900	x4380
1944B	Equal XOR bitmasks, constructive algorithms	1100	x15418
1936D	Bitwise Paradox binary search, bitmasks, data structures, greedy, two pointers	3100	x463
1936A	Bitwise Operation Wizard bitmasks, constructive algorithms, greedy, interactive, math	1700	x6978
1935E	Distance Learning Courses in MAC bitmasks, brute force, data structures, greedy, math	2400	x1268
1934D2	XOR Break --- Game Version bitmasks, games, greedy, interactive	2400	x1271
1934D1	XOR Break --- Solo Version bitmasks, constructive algorithms, greedy	2100	x3263
1933G	Turtle Magic: Royal Turtle Shell Pattern bitmasks, brute force, combinatorics, constructive algorithms, dfs and similar, math	2300	x919
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	x2499
1929E	Sasha and the Happy Tree Cutting bitmasks, brute force, dfs and similar, dp, graphs, greedy, math, trees	2300	x1592
1926F	Vlad and Avoiding X bitmasks, brute force, dfs and similar, dp, implementation	2200	x1598
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x11089
1926D	Vlad and Division bitmasks, greedy	1300	x14639
1922E	Increasing Subsequences bitmasks, constructive algorithms, divide and conquer, greedy, math	1800	x7348
1918C	XOR-distance bitmasks, greedy, implementation, math	1400	x13304
1917F	Construct Tree bitmasks, constructive algorithms, dp, trees	2500	x927
1915B	Not Quite Latin Square bitmasks, brute force, implementation	800	x40350
1915A	Odd One Out bitmasks, implementation	800	x53098
1913C	Game with Multiset binary search, bitmasks, brute force, greedy	1300	x14343
1912K	Kim's Quest bitmasks, combinatorics, dp	1800	x2228
1909E	Multiple Lamps bitmasks, brute force, constructive algorithms, math, number theory	2400	x1308
1909B	Make Almost Equal With Mod bitmasks, constructive algorithms, math, number theory	1200	x15402
1906B	Button Pressing bitmasks, constructive algorithms, hashing	2600	x475
1903D2	Maximum And Queries (hard version) bitmasks, divide and conquer, dp, greedy	2500	x742
1903D1	Maximum And Queries (easy version) binary search, bitmasks, brute force, greedy	1700	x5375
1903B	StORage room bitmasks, brute force, constructive algorithms, greedy	1200	x12090
1900D	Small GCD bitmasks, brute force, dp, math, number theory	2000	x3943
1895D	XOR Construction bitmasks, constructive algorithms, data structures, math, string suffix structures, trees	1900	x5798
1886E	I Wanna be the Team Leader bitmasks, constructive algorithms, dp, greedy, math, sortings, two pointers	2400	x1390
1883E	Look Back bitmasks, greedy	1700	x7586
1882D	Tree XOR bitmasks, dfs and similar, dp, greedy, trees	1900	x5197
1882B	Sets and Union bitmasks, brute force, constructive algorithms, greedy	1300	x14975
1879D	Sum of XOR Functions bitmasks, combinatorics, divide and conquer, dp, math	1700	x7019
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	x11951
1875C	Jellyfish and Green Apple bitmasks, greedy, math, number theory	1400	x11262
1874B	Jellyfish and Math bitmasks, brute force, dfs and similar, dp, graphs, shortest paths	2400	x1109
1872E	Data Structures Fan binary search, bitmasks, data structures, dp	1500	x12813
1870E	Another MEX Problem bitmasks, brute force, dp, shortest paths	2300	x2277
1870B	Friendly Arrays bitmasks, greedy, math	1200	x13844
1868B2	Candy Party (Hard Version) bitmasks, constructive algorithms, dp, greedy, implementation, math	2100	x2341
1868B1	Candy Party (Easy Version) bitmasks, constructive algorithms, graphs, greedy, implementation, math	1700	x6747
1867B	XOR Palindromes bitmasks, constructive algorithms, strings	1100	x16391
1864E	Guess Game bitmasks, data structures, games, math, probabilities, sortings, strings, trees	2100	x2520
1864C	Divisor Chain bitmasks, constructive algorithms, math, number theory	1300	x13079
1863F	Divide, XOR, and Conquer bitmasks, dp, math	2600	x1070
1862F	Magic Will Save the World binary search, bitmasks, brute force, dp	1800	x5990
1861F	Four Suits binary search, bitmasks, flows, greedy	3200	x189
1856E2	PermuTree (hard version) bitmasks, dfs and similar, dp, fft, greedy, implementation, math, trees	2700	x1347
1854B	Earn or Unlock bitmasks, brute force, dp	2200	x3434
1851F	Lisa and the Martians bitmasks, greedy, math, strings, trees	1800	x5576
1849F	XOR Partition binary search, bitmasks, data structures, divide and conquer, greedy, trees	2700	x689
1848F	Vika and Wiki binary search, bitmasks, combinatorics, divide and conquer, dp, math	2400	x1500
1847F	The Boss's Identity binary search, bitmasks, data structures, dfs and similar, greedy, math, sortings	2500	x871
1847C	Vampiric Powers, anyone? bitmasks, brute force, dp, greedy	1400	x12554
1847B	Hamon Odyssey bitmasks, greedy, two pointers	1000	x19616
1846G	Rudolf and CodeVid-23 bitmasks, dp, graphs, greedy, shortest paths	1900	x4230
1844G	Tree Weights bitmasks, constructive algorithms, data structures, dfs and similar, implementation, math, matrices, number theory, trees	3000	x684
1843C	Sum in Binary Tree bitmasks, combinatorics, math, trees	800	x32145
1842H	Tenzing and Random Real Numbers bitmasks, dp, graphs, math, probabilities	3000	x586
1842B	Tenzing and Books bitmasks, greedy, math	1100	x16416
1840B	Binary Cafe bitmasks, combinatorics, math	1100	x22049
1835F	Good Graph bitmasks, dfs and similar, graph matchings, graphs, implementation	3500	x158
1835C	Twin Clusters bitmasks, brute force, constructive algorithms, math, probabilities	2600	x956
1829H	Don't Blame Me bitmasks, combinatorics, dp, math	1700	x7439
1829C	Mr. Perfectly Fine bitmasks, greedy, implementation	800	x27858
1826E	Walk the Runway bitmasks, brute force, data structures, dp, graphs, implementation, sortings	2400	x1553
1815D	XOR Counting bitmasks, combinatorics, dp, math	2600	x1085
1807G2	Subsequence Addition (Hard Version) bitmasks, dp, greedy, implementation, sortings	1100	x18478
1805A	We Need the Zero bitmasks, brute force	800	x22154

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