Problemset - Codeforces

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Codeforces Round 950 (Div. 3)
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bitmasks

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Problems

#	Name
1981C	Turtle and an Incomplete Sequence bitmasks, constructive algorithms, implementation, math, shortest paths		x2375
1981B	Turtle and an Infinite Sequence bitmasks, math		x7635
1977D	XORificator bitmasks, brute force, greedy, hashing	2300	x1097
1977B	Binary Colouring bitmasks, constructive algorithms, greedy, math	1100	x13569
1975F	Set bitmasks, brute force, combinatorics, dfs and similar, divide and conquer, dp, math	2600	x512
1973F	Maximum GCD Sum Queries bitmasks, brute force, dp, implementation, number theory	3100	x135
1973B	Cat, Fox and the Lonely Array binary search, bitmasks, data structures, greedy, math, two pointers	1300	x11317
1970G3	Min-Fund Prison (Hard) bitmasks, dfs and similar, dp, graphs, trees	2400	x206
1967C	Fenwick Tree bitmasks, brute force, combinatorics, data structures, dp, math, trees	2300	x1393
1965B	Missing Subsequence Sum bitmasks, constructive algorithms, greedy, number theory	1800	x5458
1957D	A BIT of an Inequality bitmasks, brute force, dp, math	1900	x3832
1957B	A BIT of a Construction bitmasks, constructive algorithms, greedy, implementation	1100	x15782
1956D	Nene and the Mex Operator bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math	2000	x3377
1955H	The Most Reckless Defense bitmasks, brute force, constructive algorithms, dp, flows, graph matchings, shortest paths	2300	x1072
1952I	Dark Matter bitmasks, geometry		x379
1950G	Shuffling Songs bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings	1900	x3643
1950F	0, 1, 2, Tree! bitmasks, brute force, greedy, implementation, trees	1700	x7885
1948G	MST with Matching bitmasks, brute force, dsu, graph matchings, trees	3100	x629
1946D	Birthday Gift bitmasks, brute force, constructive algorithms, greedy, implementation	1900	x4168
1944B	Equal XOR bitmasks, constructive algorithms	1100	x14643
1936D	Bitwise Paradox binary search, bitmasks, data structures, greedy, two pointers	3100	x428
1936A	Bitwise Operation Wizard bitmasks, constructive algorithms, greedy, interactive, math	1700	x6690
1935E	Distance Learning Courses in MAC bitmasks, brute force, data structures, greedy, math	2400	x1195
1934D2	XOR Break --- Game Version bitmasks, games, greedy, interactive	2400	x1220
1934D1	XOR Break --- Solo Version bitmasks, constructive algorithms, greedy	2100	x3138
1933G	Turtle Magic: Royal Turtle Shell Pattern bitmasks, brute force, combinatorics, constructive algorithms, dfs and similar, math	2300	x894
1930F	Maximize the Difference bitmasks, brute force, dfs and similar	2700	x621
1930D2	Sum over all Substrings (Hard Version) bitmasks, divide and conquer, dp, dsu, greedy, implementation, strings	2100	x2400
1929E	Sasha and the Happy Tree Cutting bitmasks, brute force, dfs and similar, dp, graphs, greedy, math, trees	2300	x1540
1926F	Vlad and Avoiding X bitmasks, brute force, dfs and similar, dp, implementation	2200	x1529
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x10361
1926D	Vlad and Division bitmasks, greedy	1300	x13923
1922E	Increasing Subsequences bitmasks, constructive algorithms, divide and conquer, greedy, math	1800	x7159
1918C	XOR-distance bitmasks, greedy, implementation, math	1400	x12772
1917F	Construct Tree bitmasks, constructive algorithms, dp, trees	2500	x908
1915B	Not Quite Latin Square bitmasks, brute force, implementation	800	x39080
1915A	Odd One Out bitmasks, implementation	800	x50780
1913C	Game with Multiset binary search, bitmasks, brute force, greedy	1300	x13909
1912K	Kim's Quest bitmasks, combinatorics, dp	1800	x2097
1909E	Multiple Lamps bitmasks, brute force, constructive algorithms, math, number theory	2400	x1266
1909B	Make Almost Equal With Mod bitmasks, constructive algorithms, math, number theory	1200	x14345
1906B	Button Pressing bitmasks, constructive algorithms, hashing	2600	x460
1903D2	Maximum And Queries (hard version) bitmasks, divide and conquer, dp, greedy	2500	x716
1903D1	Maximum And Queries (easy version) binary search, bitmasks, brute force, greedy	1700	x5183
1903B	StORage room bitmasks, brute force, constructive algorithms, greedy	1200	x11572
1900D	Small GCD bitmasks, brute force, dp, math, number theory	2000	x3768
1895D	XOR Construction bitmasks, constructive algorithms, data structures, math, string suffix structures, trees	1900	x5633
1886E	I Wanna be the Team Leader bitmasks, constructive algorithms, dp, greedy, math, sortings, two pointers	2400	x1348
1883E	Look Back bitmasks, greedy	1700	x7197
1882D	Tree XOR bitmasks, dfs and similar, dp, greedy, trees	1900	x5040
1882B	Sets and Union bitmasks, brute force, constructive algorithms, greedy	1300	x14459
1879D	Sum of XOR Functions bitmasks, combinatorics, divide and conquer, dp, math	1700	x6701
1878G	wxhtzdy ORO Tree binary search, bitmasks, brute force, data structures, dfs and similar, implementation, trees	2300	x1105
1878E	Iva & Pav binary search, bitmasks, data structures, greedy	1400	x11344
1875C	Jellyfish and Green Apple bitmasks, greedy, math, number theory	1400	x10924
1874B	Jellyfish and Math bitmasks, brute force, dfs and similar, dp, graphs, shortest paths	2400	x1075
1872E	Data Structures Fan binary search, bitmasks, data structures, dp	1500	x12239
1870E	Another MEX Problem bitmasks, brute force, dp, shortest paths	2300	x2225
1870B	Friendly Arrays bitmasks, greedy, math	1200	x13503
1868B2	Candy Party (Hard Version) bitmasks, constructive algorithms, dp, greedy, implementation, math	2100	x2293
1868B1	Candy Party (Easy Version) bitmasks, constructive algorithms, graphs, greedy, implementation, math	1700	x6536
1867B	XOR Palindromes bitmasks, constructive algorithms, strings	1100	x15989
1864E	Guess Game bitmasks, data structures, games, math, probabilities, sortings, strings, trees	2100	x2480
1864C	Divisor Chain bitmasks, constructive algorithms, math, number theory	1300	x12742
1863F	Divide, XOR, and Conquer bitmasks, dp, math	2600	x1044
1862F	Magic Will Save the World binary search, bitmasks, brute force, dp	1800	x5765
1861F	Four Suits binary search, bitmasks, flows, greedy	3200	x149
1856E2	PermuTree (hard version) bitmasks, dfs and similar, dp, fft, greedy, implementation, math, trees	2700	x1321
1854B	Earn or Unlock bitmasks, brute force, dp	2200	x3373
1851F	Lisa and the Martians bitmasks, greedy, math, strings, trees	1800	x5385
1849F	XOR Partition binary search, bitmasks, data structures, divide and conquer, greedy, trees	2700	x666
1848F	Vika and Wiki binary search, bitmasks, combinatorics, divide and conquer, dp, math	2400	x1466
1847F	The Boss's Identity binary search, bitmasks, data structures, dfs and similar, greedy, math, sortings	2500	x860
1847C	Vampiric Powers, anyone? bitmasks, brute force, dp, greedy	1400	x12304
1847B	Hamon Odyssey bitmasks, greedy, two pointers	1000	x19227
1846G	Rudolf and CodeVid-23 bitmasks, dp, graphs, greedy, shortest paths	1900	x4103
1844G	Tree Weights bitmasks, constructive algorithms, data structures, dfs and similar, implementation, math, matrices, number theory, trees	3000	x654
1843C	Sum in Binary Tree bitmasks, combinatorics, math, trees	800	x31352
1842H	Tenzing and Random Real Numbers bitmasks, dp, graphs, math, probabilities	3000	x568
1842B	Tenzing and Books bitmasks, greedy, math	1100	x15885
1840B	Binary Cafe bitmasks, combinatorics, math	1100	x21638
1835F	Good Graph bitmasks, dfs and similar, graph matchings, graphs, implementation	3500	x152
1835C	Twin Clusters bitmasks, brute force, constructive algorithms, math, probabilities	2600	x946
1829H	Don't Blame Me bitmasks, combinatorics, dp, math	1700	x7166
1829C	Mr. Perfectly Fine bitmasks, greedy, implementation	800	x27330
1826E	Walk the Runway bitmasks, brute force, data structures, dp, graphs, implementation, sortings	2400	x1517
1815D	XOR Counting bitmasks, combinatorics, dp, math	2600	x1060
1807G2	Subsequence Addition (Hard Version) bitmasks, dp, greedy, implementation, sortings	1100	x17893
1805A	We Need the Zero bitmasks, brute force	800	x21396
1804H	Code Lock bitmasks, dp	3300	x170
1804E	Routing bitmasks, brute force, dfs and similar, dp, graphs	2400	x1374
1801A	The Very Beautiful Blanket bitmasks, constructive algorithms	1600	x8188
1800F	Dasha and Nightmares bitmasks, hashing, meet-in-the-middle, strings	1900	x3724
1799H	Tree Cutting bitmasks, dfs and similar, dp	3200	x273
1795G	Removal Sequences bitmasks, dfs and similar, graphs	2700	x658
1792D	Fixed Prefix Permutations binary search, bitmasks, data structures, hashing, math, sortings	1700	x5947
1790E	Vlad and a Pair of Numbers bitmasks, constructive algorithms	1400	x14319
1789F	Serval and Brain Power bitmasks, brute force, dp, greedy, implementation, strings	2700	x523
1789D	Serval and Shift-Shift-Shift bitmasks, brute force, constructive algorithms, implementation	2200	x1590
1788F	XOR, Tree, and Queries bitmasks, constructive algorithms, dfs and similar, dsu, graphs, greedy, implementation, trees	2500	x801

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