Problemset - Codeforces

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bitmasks

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Problems

#	Name
1748D	ConstructOR bitmasks, chinese remainder theorem, combinatorics, constructive algorithms, math, number theory	2100	x2654
817E	Choosing The Commander bitmasks, data structures, trees	2000	x2683
547C	Mike and Foam bitmasks, combinatorics, dp, math, number theory	2300	x2701
1166E	The LCMs Must be Large bitmasks, brute force, constructive algorithms, math, number theory	2100	x2704
1209E1	Rotate Columns (easy version) bitmasks, brute force, dp, greedy, sortings	2000	x2713
525E	Anya and Cubes binary search, bitmasks, brute force, dp, math, meet-in-the-middle	2100	x2722
1238E	Keyboard Purchase bitmasks, dp	2200	x2726
1088D	Ehab and another another xor problem bitmasks, constructive algorithms, implementation, interactive	2000	x2754
1466F	Euclid's nightmare bitmasks, dfs and similar, dsu, graphs, greedy, math, sortings	2100	x2790
766E	Mahmoud and a xor trip bitmasks, constructive algorithms, data structures, dfs and similar, dp, math, trees	2100	x2803
1451E2	Bitwise Queries (Hard Version) bitmasks, constructive algorithms, interactive, math	2300	x2825
1605D	Treelabeling bitmasks, constructive algorithms, dfs and similar, games, greedy, implementation, trees	2100	x2832
1956D	Nene and the Mex Operator bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math	2000	x2893
792D	Paths in a Complete Binary Tree bitmasks, trees	1900	x2897
1215E	Marbles bitmasks, dp	2200	x2909
1338C	Perfect Triples bitmasks, brute force, constructive algorithms, divide and conquer, math	2200	x2959
1030E	Vasya and Good Sequences bitmasks, dp	2000	x2967
900D	Unusual Sequences bitmasks, combinatorics, dp, math, number theory	2000	x2969
803F	Coprime Subsequences bitmasks, combinatorics, number theory	2000	x2983
1934D1	XOR Break --- Solo Version bitmasks, constructive algorithms, greedy	2100	x3019
1957D	A BIT of an Inequality bitmasks, brute force, dp, math		x3118
1331C	...And after happily lived ever they *special problem, bitmasks		x3131
981D	Bookshelves bitmasks, dp, greedy	1900	x3156
1777D	Score of a Tree bitmasks, combinatorics, dfs and similar, dp, math, probabilities, trees	1900	x3201
451E	Devu and Flowers bitmasks, combinatorics, number theory	2300	x3214
1392E	Omkar and Duck bitmasks, constructive algorithms, interactive, math	2100	x3234
8C	Looking for Order bitmasks, dp	2000	x3241
1950G	Shuffling Songs bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings	1900	x3274
959E	Mahmoud and Ehab and the xor-MST bitmasks, dp, graphs, implementation, math	1900	x3301
1854B	Earn or Unlock bitmasks, brute force, dp	2200	x3319
1017D	The Wu bitmasks, brute force, data structures	1900	x3332
282E	Sausage Maximization bitmasks, data structures, trees	2200	x3343
1446C	Xor Tree binary search, bitmasks, data structures, divide and conquer, dp, trees	2100	x3385
581D	Three Logos bitmasks, brute force, constructive algorithms, geometry, implementation, math	1700	x3411
1316E	Team Building bitmasks, dp, greedy, sortings	2300	x3442
1146C	Tree Diameter bitmasks, graphs, interactive	1700	x3493
114B	PFAST Inc. bitmasks, brute force, graphs	1500	x3516
1680E	Moving Chips bitmasks, dp, greedy	2000	x3623
1900D	Small GCD bitmasks, brute force, dp, math, number theory	2000	x3667
1800F	Dasha and Nightmares bitmasks, hashing, meet-in-the-middle, strings	1900	x3671
1665D	GCD Guess bitmasks, chinese remainder theorem, constructive algorithms, games, interactive, math, number theory	2000	x3677
1220D	Alex and Julian bitmasks, math, number theory	1900	x3684
1600J	Robot Factory bitmasks, dfs and similar	1400	x3770
243A	The Brand New Function bitmasks	1600	x3781
960C	Subsequence Counting bitmasks, constructive algorithms, greedy, implementation	1700	x3807
888G	Xor-MST bitmasks, constructive algorithms, data structures	2300	x3875
1946D	Birthday Gift bitmasks, brute force, constructive algorithms, greedy, implementation	1900	x3899
1322B	Present binary search, bitmasks, constructive algorithms, data structures, math, sortings	2100	x3900
401D	Roman and Numbers bitmasks, brute force, combinatorics, dp, number theory	2000	x3965
1144E	Median String bitmasks, math, number theory, strings	1900	x4012
1618F	Reverse bitmasks, constructive algorithms, dfs and similar, implementation, math, strings	2000	x4017
1846G	Rudolf and CodeVid-23 bitmasks, dp, graphs, greedy, shortest paths	1900	x4029
449D	Jzzhu and Numbers bitmasks, combinatorics, dp	2400	x4061
1438D	Powerful Ksenia bitmasks, constructive algorithms, math	2200	x4062
1416C	XOR Inverse bitmasks, data structures, divide and conquer, dp, greedy, math, sortings, strings, trees	2000	x4162
1451E1	Bitwise Queries (Easy Version) bitmasks, constructive algorithms, interactive, math	2000	x4182
1560F2	Nearest Beautiful Number (hard version) bitmasks, brute force, constructive algorithms, dfs and similar, dp, greedy	2100	x4186
877E	Danil and a Part-time Job bitmasks, data structures, trees	2000	x4232
1360H	Binary Median binary search, bitmasks, brute force, constructive algorithms	2100	x4276
244B	Undoubtedly Lucky Numbers bitmasks, brute force, dfs and similar	1600	x4364
11D	A Simple Task bitmasks, dp, graphs	2200	x4423
1747D	Yet Another Problem binary search, bitmasks, constructive algorithms, data structures	1900	x4465
453B	Little Pony and Harmony Chest bitmasks, brute force, dp	2000	x4517
868C	Qualification Rounds bitmasks, brute force, constructive algorithms, dp	1500	x4520
1174D	Ehab and the Expected XOR Problem bitmasks, constructive algorithms	1900	x4592
16E	Fish bitmasks, dp, probabilities	1900	x4606
1006F	Xor-Paths bitmasks, brute force, dp, meet-in-the-middle	2100	x4627
1780D	Bit Guessing Game binary search, bitmasks, constructive algorithms, interactive	1800	x4632
1383B	GameGame bitmasks, constructive algorithms, dp, games, greedy, math	1900	x4755
1715D	2+ doors 2-sat, bitmasks, graphs, greedy	1900	x4905
1391D	505 bitmasks, brute force, constructive algorithms, dp, greedy, implementation	2000	x4921
1882D	Tree XOR bitmasks, dfs and similar, dp, greedy, trees	1900	x4942
1903D1	Maximum And Queries (easy version) binary search, bitmasks, brute force, greedy	1700	x5022
812B	Sagheer, the Hausmeister bitmasks, brute force, dp	1600	x5068
895C	Square Subsets bitmasks, combinatorics, dp, math	2000	x5107
27B	Tournament bitmasks, brute force, dfs and similar, greedy	1300	x5133
1415D	XOR-gun bitmasks, brute force, constructive algorithms	2000	x5159
620E	New Year Tree bitmasks, data structures, trees	2100	x5167
510D	Fox And Jumping bitmasks, brute force, dp, math	1900	x5169
1543C	Need for Pink Slips bitmasks, brute force, dfs and similar, implementation, math, probabilities	1900	x5179
961C	Chessboard bitmasks, brute force, implementation	1400	x5215
1582F1	Korney Korneevich and XOR (easy version) bitmasks, dp, greedy	1800	x5237
878A	Short Program bitmasks, constructive algorithms	1600	x5263
1851F	Lisa and the Martians bitmasks, greedy, math, strings, trees	1800	x5270
1624G	MinOr Tree bitmasks, dfs and similar, dsu, graphs, greedy	1900	x5517
1895D	XOR Construction bitmasks, constructive algorithms, data structures, math, string suffix structures, trees	1900	x5532
1732C1	Sheikh (Easy version) binary search, bitmasks, greedy, two pointers	1800	x5552
1207E	XOR Guessing bitmasks, interactive, math	1900	x5596
1862F	Magic Will Save the World binary search, bitmasks, brute force, dp	1800	x5621
1720D1	Xor-Subsequence (easy version) bitmasks, brute force, dp, strings, trees, two pointers	1800	x5710
1792D	Fixed Prefix Permutations binary search, bitmasks, data structures, hashing, math, sortings	1700	x5861
1560F1	Nearest Beautiful Number (easy version) binary search, bitmasks, brute force, constructive algorithms, dfs and similar, greedy	1900	x5897
1492D	Genius's Gambit bitmasks, constructive algorithms, greedy, math	1900	x5921
1635D	Infinite Set bitmasks, dp, math, matrices, number theory, strings	1800	x5988
1470B	Strange Definition bitmasks, graphs, hashing, math, number theory	1900	x6139
165E	Compatible Numbers bitmasks, brute force, dfs and similar, dp	2200	x6166
677C	Vanya and Label bitmasks, combinatorics, implementation, strings	1500	x6271
1721D	Maximum AND bitmasks, dfs and similar, divide and conquer, greedy, sortings	1800	x6277
1205B	Shortest Cycle bitmasks, brute force, graphs, shortest paths	1900	x6282
1329B	Dreamoon Likes Sequences bitmasks, combinatorics, math	1700	x6351