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bitmasks

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Problems

#	Name
437B	The Child and Set bitmasks, greedy, implementation, sortings	1500	x9184
1731C	Even Subarrays bitmasks, brute force, hashing, math, number theory	1700	x9005
1202A	You Are Given Two Binary Strings... bitmasks, greedy	1100	x9001
1152B	Neko Performs Cat Furrier Transform bitmasks, constructive algorithms, dfs and similar, math	1300	x8816
1658D1	388535 (Easy Version) bitmasks, math	1600	x8781
1225C	p-binary bitmasks, brute force, math	1600	x8656
1554C	Mikasa binary search, bitmasks, greedy, implementation	1800	x8547
242E	XOR on Segment bitmasks, data structures	2000	x8472
1557C	Moamen and XOR bitmasks, combinatorics, dp, math, matrices	1700	x8347
1801A	The Very Beautiful Blanket bitmasks, constructive algorithms	1600	x8139
1338B	Edge Weight Assignment bitmasks, constructive algorithms, dfs and similar, greedy, math, trees	1800	x8106
1332D	Walk on Matrix bitmasks, constructive algorithms, math	1700	x7876
913C	Party Lemonade bitmasks, dp, greedy	1600	x7749
1950F	0, 1, 2, Tree! bitmasks, brute force, greedy, implementation, trees	1700	x7724
1778C	Flexible String bitmasks, brute force, strings	1600	x7702
1592C	Bakry and Partitioning bitmasks, constructive algorithms, dfs and similar, dp, graphs, trees	1700	x7635
1340B	Nastya and Scoreboard bitmasks, dp, graphs, greedy	1700	x7575
1543D1	RPD and Rap Sheet (Easy Version) bitmasks, constructive algorithms, interactive, math	1700	x7450
1285D	Dr. Evil Underscores bitmasks, brute force, dfs and similar, divide and conquer, dp, greedy, strings, trees	1900	x7352
224B	Array bitmasks, implementation, two pointers	1500	x7165
1051D	Bicolorings bitmasks, dp	1700	x7154
1829H	Don't Blame Me bitmasks, combinatorics, dp, math	1700	x7132
1883E	Look Back bitmasks, greedy	1700	x7109
1217C	The Number Of Good Substrings binary search, bitmasks, brute force	1700	x7096
1922E	Increasing Subsequences bitmasks, constructive algorithms, divide and conquer, greedy, math	1800	x7085
1466E	Apollo versus Pan bitmasks, brute force, math	1800	x7012
1760G	SlavicG's Favorite Problem bitmasks, dfs and similar, graphs	1700	x6933
1491D	Zookeeper and The Infinite Zoo bitmasks, constructive algorithms, dp, greedy, math	1800	x6908
1303D	Fill The Bag bitmasks, greedy	1900	x6829
1552D	Array Differentiation bitmasks, brute force, constructive algorithms, dfs and similar, dp, graphs, math	1800	x6711
1288D	Minimax Problem binary search, bitmasks, dp	2000	x6703
570D	Tree Requests binary search, bitmasks, constructive algorithms, dfs and similar, graphs, trees	2200	x6700
888E	Maximum Subsequence bitmasks, divide and conquer, meet-in-the-middle	1800	x6663
1879D	Sum of XOR Functions bitmasks, combinatorics, divide and conquer, dp, math	1700	x6636
1936A	Bitwise Operation Wizard bitmasks, constructive algorithms, greedy, interactive, math	1700	x6619
1556D	Take a Guess bitmasks, constructive algorithms, interactive, math	1800	x6515
1868B1	Candy Party (Easy Version) bitmasks, constructive algorithms, graphs, greedy, implementation, math	1700	x6489
1329B	Dreamoon Likes Sequences bitmasks, combinatorics, math	1700	x6393
1205B	Shortest Cycle bitmasks, brute force, graphs, shortest paths	1900	x6365
1721D	Maximum AND bitmasks, dfs and similar, divide and conquer, greedy, sortings	1800	x6336
677C	Vanya and Label bitmasks, combinatorics, implementation, strings	1500	x6290
165E	Compatible Numbers bitmasks, brute force, dfs and similar, dp	2200	x6216
1470B	Strange Definition bitmasks, graphs, hashing, math, number theory	1900	x6156
1635D	Infinite Set bitmasks, dp, math, matrices, number theory, strings	1800	x6021
1492D	Genius's Gambit bitmasks, constructive algorithms, greedy, math	1900	x5941
1560F1	Nearest Beautiful Number (easy version) binary search, bitmasks, brute force, constructive algorithms, dfs and similar, greedy	1900	x5931
1792D	Fixed Prefix Permutations binary search, bitmasks, data structures, hashing, math, sortings	1700	x5911
1720D1	Xor-Subsequence (easy version) bitmasks, brute force, dp, strings, trees, two pointers	1800	x5739
1862F	Magic Will Save the World binary search, bitmasks, brute force, dp	1800	x5721
1207E	XOR Guessing bitmasks, interactive, math	1900	x5632
1895D	XOR Construction bitmasks, constructive algorithms, data structures, math, string suffix structures, trees	1900	x5598
1732C1	Sheikh (Easy version) binary search, bitmasks, greedy, two pointers	1800	x5585
1624G	MinOr Tree bitmasks, dfs and similar, dsu, graphs, greedy	1900	x5566
1851F	Lisa and the Martians bitmasks, greedy, math, strings, trees	1800	x5333
878A	Short Program bitmasks, constructive algorithms	1600	x5299
1582F1	Korney Korneevich and XOR (easy version) bitmasks, dp, greedy	1800	x5273
620E	New Year Tree bitmasks, data structures, trees	2100	x5237
961C	Chessboard bitmasks, brute force, implementation	1400	x5232
1415D	XOR-gun bitmasks, brute force, constructive algorithms	2000	x5192
1543C	Need for Pink Slips bitmasks, brute force, dfs and similar, implementation, math, probabilities	1900	x5189
510D	Fox And Jumping bitmasks, brute force, dp, math	1900	x5189
1965B	Missing Subsequence Sum bitmasks, constructive algorithms, greedy, number theory	1800	x5183
27B	Tournament bitmasks, brute force, dfs and similar, greedy	1300	x5158
895C	Square Subsets bitmasks, combinatorics, dp, math	2000	x5137
1903D1	Maximum And Queries (easy version) binary search, bitmasks, brute force, greedy	1700	x5129
812B	Sagheer, the Hausmeister bitmasks, brute force, dp	1600	x5077
1882D	Tree XOR bitmasks, dfs and similar, dp, greedy, trees	1900	x5000
1391D	505 bitmasks, brute force, constructive algorithms, dp, greedy, implementation	2000	x4941
1715D	2+ doors 2-sat, bitmasks, graphs, greedy	1900	x4937
1383B	GameGame bitmasks, constructive algorithms, dp, games, greedy, math	1900	x4776
1006F	Xor-Paths bitmasks, brute force, dp, meet-in-the-middle	2100	x4710
16E	Fish bitmasks, dp, probabilities	1900	x4672
1780D	Bit Guessing Game binary search, bitmasks, constructive algorithms, interactive	1800	x4662
1174D	Ehab and the Expected XOR Problem bitmasks, constructive algorithms	1900	x4603
868C	Qualification Rounds bitmasks, brute force, constructive algorithms, dp	1500	x4530
453B	Little Pony and Harmony Chest bitmasks, brute force, dp	2000	x4530
1747D	Yet Another Problem binary search, bitmasks, constructive algorithms, data structures	1900	x4497
11D	A Simple Task bitmasks, dp, graphs	2200	x4482
244B	Undoubtedly Lucky Numbers bitmasks, brute force, dfs and similar	1600	x4385
1360H	Binary Median binary search, bitmasks, brute force, constructive algorithms	2100	x4290
877E	Danil and a Part-time Job bitmasks, data structures, trees	2000	x4264
1560F2	Nearest Beautiful Number (hard version) bitmasks, brute force, constructive algorithms, dfs and similar, dp, greedy	2100	x4209
1451E1	Bitwise Queries (Easy Version) bitmasks, constructive algorithms, interactive, math	2000	x4206
1416C	XOR Inverse bitmasks, data structures, divide and conquer, dp, greedy, math, sortings, strings, trees	2000	x4191
449D	Jzzhu and Numbers bitmasks, combinatorics, dp	2400	x4096
1946D	Birthday Gift bitmasks, brute force, constructive algorithms, greedy, implementation	1900	x4084
1438D	Powerful Ksenia bitmasks, constructive algorithms, math	2200	x4071
1846G	Rudolf and CodeVid-23 bitmasks, dp, graphs, greedy, shortest paths	1900	x4069
1144E	Median String bitmasks, math, number theory, strings	1900	x4064
1618F	Reverse bitmasks, constructive algorithms, dfs and similar, implementation, math, strings	2000	x4047
401D	Roman and Numbers bitmasks, brute force, combinatorics, dp, number theory	2000	x3974
1322B	Present binary search, bitmasks, constructive algorithms, data structures, math, sortings	2100	x3953
888G	Xor-MST bitmasks, constructive algorithms, data structures	2300	x3901
960C	Subsequence Counting bitmasks, constructive algorithms, greedy, implementation	1700	x3862
243A	The Brand New Function bitmasks	1600	x3804
1600J	Robot Factory bitmasks, dfs and similar	1400	x3786
1900D	Small GCD bitmasks, brute force, dp, math, number theory	2000	x3738
1665D	GCD Guess bitmasks, chinese remainder theorem, constructive algorithms, games, interactive, math, number theory	2000	x3721
1800F	Dasha and Nightmares bitmasks, hashing, meet-in-the-middle, strings	1900	x3710
1957D	A BIT of an Inequality bitmasks, brute force, dp, math	1900	x3703