Problemset - Codeforces

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bitmasks

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Problems

#	Name
1202A	You Are Given Two Binary Strings... bitmasks, greedy	1100	x8965
1731C	Even Subarrays bitmasks, brute force, hashing, math, number theory	1700	x8942
1152B	Neko Performs Cat Furrier Transform bitmasks, constructive algorithms, dfs and similar, math	1300	x8811
1658D1	388535 (Easy Version) bitmasks, math	1600	x8763
1225C	p-binary bitmasks, brute force, math	1600	x8645
1554C	Mikasa binary search, bitmasks, greedy, implementation	1800	x8533
242E	XOR on Segment bitmasks, data structures	2000	x8430
1557C	Moamen and XOR bitmasks, combinatorics, dp, math, matrices	1700	x8331
1801A	The Very Beautiful Blanket bitmasks, constructive algorithms	1600	x8112
1338B	Edge Weight Assignment bitmasks, constructive algorithms, dfs and similar, greedy, math, trees	1800	x8082
1332D	Walk on Matrix bitmasks, constructive algorithms, math	1700	x7867
913C	Party Lemonade bitmasks, dp, greedy	1600	x7743
1778C	Flexible String bitmasks, brute force, strings	1600	x7667
1592C	Bakry and Partitioning bitmasks, constructive algorithms, dfs and similar, dp, graphs, trees	1700	x7612
1340B	Nastya and Scoreboard bitmasks, dp, graphs, greedy	1700	x7572
1950F	0, 1, 2, Tree! bitmasks, brute force, greedy, implementation, trees	1700	x7533
1543D1	RPD and Rap Sheet (Easy Version) bitmasks, constructive algorithms, interactive, math	1700	x7437
1285D	Dr. Evil Underscores bitmasks, brute force, dfs and similar, divide and conquer, dp, greedy, strings, trees	1900	x7338
224B	Array bitmasks, implementation, two pointers	1500	x7159
1051D	Bicolorings bitmasks, dp	1700	x7136
1217C	The Number Of Good Substrings binary search, bitmasks, brute force	1700	x7090
1829H	Don't Blame Me bitmasks, combinatorics, dp, math	1700	x7070
1883E	Look Back bitmasks, greedy	1700	x7053
1922E	Increasing Subsequences bitmasks, constructive algorithms, divide and conquer, greedy, math	1800	x7040
1466E	Apollo versus Pan bitmasks, brute force, math	1800	x6982
1491D	Zookeeper and The Infinite Zoo bitmasks, constructive algorithms, dp, greedy, math	1800	x6892
1760G	SlavicG's Favorite Problem bitmasks, dfs and similar, graphs	1700	x6884
1303D	Fill The Bag bitmasks, greedy	1900	x6822
1552D	Array Differentiation bitmasks, brute force, constructive algorithms, dfs and similar, dp, graphs, math	1800	x6688
1288D	Minimax Problem binary search, bitmasks, dp	2000	x6683
570D	Tree Requests binary search, bitmasks, constructive algorithms, dfs and similar, graphs, trees	2200	x6673
888E	Maximum Subsequence bitmasks, divide and conquer, meet-in-the-middle	1800	x6635
1879D	Sum of XOR Functions bitmasks, combinatorics, divide and conquer, dp, math	1700	x6583
1936A	Bitwise Operation Wizard bitmasks, constructive algorithms, greedy, interactive, math	1700	x6552
1556D	Take a Guess bitmasks, constructive algorithms, interactive, math	1800	x6487
1868B1	Candy Party (Easy Version) bitmasks, constructive algorithms, graphs, greedy, implementation, math	1700	x6443
1329B	Dreamoon Likes Sequences bitmasks, combinatorics, math	1700	x6377
1205B	Shortest Cycle bitmasks, brute force, graphs, shortest paths	1900	x6322
1721D	Maximum AND bitmasks, dfs and similar, divide and conquer, greedy, sortings	1800	x6298
677C	Vanya and Label bitmasks, combinatorics, implementation, strings	1500	x6281
165E	Compatible Numbers bitmasks, brute force, dfs and similar, dp	2200	x6196
1470B	Strange Definition bitmasks, graphs, hashing, math, number theory	1900	x6147
1635D	Infinite Set bitmasks, dp, math, matrices, number theory, strings	1800	x5999
1492D	Genius's Gambit bitmasks, constructive algorithms, greedy, math	1900	x5929
1560F1	Nearest Beautiful Number (easy version) binary search, bitmasks, brute force, constructive algorithms, dfs and similar, greedy	1900	x5914
1792D	Fixed Prefix Permutations binary search, bitmasks, data structures, hashing, math, sortings	1700	x5882
1720D1	Xor-Subsequence (easy version) bitmasks, brute force, dp, strings, trees, two pointers	1800	x5723
1862F	Magic Will Save the World binary search, bitmasks, brute force, dp	1800	x5669
1207E	XOR Guessing bitmasks, interactive, math	1900	x5605
1895D	XOR Construction bitmasks, constructive algorithms, data structures, math, string suffix structures, trees	1900	x5567
1732C1	Sheikh (Easy version) binary search, bitmasks, greedy, two pointers	1800	x5564
1624G	MinOr Tree bitmasks, dfs and similar, dsu, graphs, greedy	1900	x5538
1851F	Lisa and the Martians bitmasks, greedy, math, strings, trees	1800	x5301
878A	Short Program bitmasks, constructive algorithms	1600	x5268
1582F1	Korney Korneevich and XOR (easy version) bitmasks, dp, greedy	1800	x5252
961C	Chessboard bitmasks, brute force, implementation	1400	x5228
620E	New Year Tree bitmasks, data structures, trees	2100	x5197
510D	Fox And Jumping bitmasks, brute force, dp, math	1900	x5182
1543C	Need for Pink Slips bitmasks, brute force, dfs and similar, implementation, math, probabilities	1900	x5181
1415D	XOR-gun bitmasks, brute force, constructive algorithms	2000	x5177
27B	Tournament bitmasks, brute force, dfs and similar, greedy	1300	x5145
895C	Square Subsets bitmasks, combinatorics, dp, math	2000	x5124
812B	Sagheer, the Hausmeister bitmasks, brute force, dp	1600	x5071
1903D1	Maximum And Queries (easy version) binary search, bitmasks, brute force, greedy	1700	x5065
1882D	Tree XOR bitmasks, dfs and similar, dp, greedy, trees	1900	x4972
1391D	505 bitmasks, brute force, constructive algorithms, dp, greedy, implementation	2000	x4932
1715D	2+ doors 2-sat, bitmasks, graphs, greedy	1900	x4920
1383B	GameGame bitmasks, constructive algorithms, dp, games, greedy, math	1900	x4763
1965B	Missing Subsequence Sum bitmasks, constructive algorithms, greedy, number theory	1800	x4740
1006F	Xor-Paths bitmasks, brute force, dp, meet-in-the-middle	2100	x4672
16E	Fish bitmasks, dp, probabilities	1900	x4646
1780D	Bit Guessing Game binary search, bitmasks, constructive algorithms, interactive	1800	x4644
1174D	Ehab and the Expected XOR Problem bitmasks, constructive algorithms	1900	x4597
868C	Qualification Rounds bitmasks, brute force, constructive algorithms, dp	1500	x4524
453B	Little Pony and Harmony Chest bitmasks, brute force, dp	2000	x4523
1747D	Yet Another Problem binary search, bitmasks, constructive algorithms, data structures	1900	x4488
11D	A Simple Task bitmasks, dp, graphs	2200	x4459
244B	Undoubtedly Lucky Numbers bitmasks, brute force, dfs and similar	1600	x4378
1360H	Binary Median binary search, bitmasks, brute force, constructive algorithms	2100	x4283
877E	Danil and a Part-time Job bitmasks, data structures, trees	2000	x4249
1560F2	Nearest Beautiful Number (hard version) bitmasks, brute force, constructive algorithms, dfs and similar, dp, greedy	2100	x4198
1451E1	Bitwise Queries (Easy Version) bitmasks, constructive algorithms, interactive, math	2000	x4194
1416C	XOR Inverse bitmasks, data structures, divide and conquer, dp, greedy, math, sortings, strings, trees	2000	x4181
449D	Jzzhu and Numbers bitmasks, combinatorics, dp	2400	x4088
1438D	Powerful Ksenia bitmasks, constructive algorithms, math	2200	x4067
1144E	Median String bitmasks, math, number theory, strings	1900	x4054
1846G	Rudolf and CodeVid-23 bitmasks, dp, graphs, greedy, shortest paths	1900	x4051
1618F	Reverse bitmasks, constructive algorithms, dfs and similar, implementation, math, strings	2000	x4029
1946D	Birthday Gift bitmasks, brute force, constructive algorithms, greedy, implementation	1900	x4001
401D	Roman and Numbers bitmasks, brute force, combinatorics, dp, number theory	2000	x3970
1322B	Present binary search, bitmasks, constructive algorithms, data structures, math, sortings	2100	x3947
888G	Xor-MST bitmasks, constructive algorithms, data structures	2300	x3886
960C	Subsequence Counting bitmasks, constructive algorithms, greedy, implementation	1700	x3813
243A	The Brand New Function bitmasks	1600	x3787
1600J	Robot Factory bitmasks, dfs and similar	1400	x3775
1900D	Small GCD bitmasks, brute force, dp, math, number theory	2000	x3696
1665D	GCD Guess bitmasks, chinese remainder theorem, constructive algorithms, games, interactive, math, number theory	2000	x3693
1800F	Dasha and Nightmares bitmasks, hashing, meet-in-the-middle, strings	1900	x3691
1220D	Alex and Julian bitmasks, math, number theory	1900	x3688
1680E	Moving Chips bitmasks, dp, greedy	2000	x3632