Problemset - Codeforces

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Codeforces Round (Div. 2)
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bitmasks

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Problems

#	Name
959F	Mahmoud and Ehab and yet another xor task bitmasks, dp, math, matrices	2400	x2000
959E	Mahmoud and Ehab and the xor-MST bitmasks, dp, graphs, implementation, math	1900	x3343
938G	Shortest Path Queries bitmasks, data structures, dsu, graphs	2900	x870
938F	Erasing Substrings bitmasks, dp, greedy	2700	x474
920G	List Of Integers binary search, bitmasks, brute force, combinatorics, math, number theory	2200	x1708
916B	Jamie and Binary Sequence (changed after round) bitmasks, greedy, math	2000	x1733
914G	Sum the Fibonacci bitmasks, divide and conquer, dp, fft, math	2600	x905
914F	Substrings in a String bitmasks, brute force, data structures, string suffix structures, strings	3000	x1476
914E	Palindromes in a Tree bitmasks, data structures, divide and conquer, trees	2400	x1435
913E	Logical Expression bitmasks, dp, shortest paths	2400	x761
913C	Party Lemonade bitmasks, dp, greedy	1600	x7803
912B	New Year's Eve bitmasks, constructive algorithms, number theory	1300	x11709
908E	New Year and Entity Enumeration bitmasks, combinatorics, dp, math	2500	x746
906C	Party bitmasks, brute force, dp, graphs	2400	x1189
903F	Clear The Matrix bitmasks, dp	2200	x627
900D	Unusual Sequences bitmasks, combinatorics, dp, math, number theory	2000	x3064
895C	Square Subsets bitmasks, combinatorics, dp, math	2000	x5249
888G	Xor-MST bitmasks, constructive algorithms, data structures	2300	x4045
888E	Maximum Subsequence bitmasks, divide and conquer, meet-in-the-middle	1800	x6853
878D	Magic Breeding bitmasks	2900	x645
878A	Short Program bitmasks, constructive algorithms	1600	x5340
877E	Danil and a Part-time Job bitmasks, data structures, trees	2000	x4319
875D	High Cry binary search, bitmasks, combinatorics, data structures, divide and conquer	2200	x2085
868D	Huge Strings bitmasks, brute force, dp, implementation, strings	2200	x895
868C	Qualification Rounds bitmasks, brute force, constructive algorithms, dp	1500	x4574
865F	Egg Roulette bitmasks, brute force, divide and conquer, math, meet-in-the-middle	3300	x68
865E	Hex Dyslexia bitmasks, brute force, dp, graphs	3300	x120
855E	Salazar Slytherin's Locket bitmasks, dp	2200	x1678
850E	Random Elections bitmasks, brute force, divide and conquer, fft, math	2800	x382
850C	Arpa and a game with Mojtaba bitmasks, dp, games	2200	x1395
845F	Guards In The Storehouse bitmasks, dp	2500	x428
817E	Choosing The Commander bitmasks, data structures, trees	2000	x2763
812B	Sagheer, the Hausmeister bitmasks, brute force, dp	1600	x5130
803F	Coprime Subsequences bitmasks, combinatorics, number theory	2000	x3105
796F	Sequence Recovery bitmasks, data structures, greedy	2800	x175
792D	Paths in a Complete Binary Tree bitmasks, trees	1900	x2929
780F	Axel and Marston in Bitland bitmasks, dp, graphs, matrices	2400	x1032
778B	Bitwise Formula bitmasks, brute force, dfs and similar, expression parsing, implementation	1800	x2284
776G	Sherlock and the Encrypted Data bitmasks, combinatorics, dp	2900	x335
772D	Varying Kibibits bitmasks, dp	2700	x580
769D	k-Interesting Pairs Of Integers *special problem, bitmasks, brute force, meet-in-the-middle	1700	x2262
768E	Game of Stones bitmasks, dp, games	2100	x2775
766E	Mahmoud and a xor trip bitmasks, constructive algorithms, data structures, dfs and similar, dp, math, trees	2100	x2909
757D	Felicity's Big Secret Revealed bitmasks, dp	2200	x1280
755F	PolandBall and Gifts bitmasks, dp, greedy	2600	x1297
754E	Dasha and cyclic table bitmasks, brute force, fft, strings, trees	2600	x486
750G	New Year and Binary Tree Paths bitmasks, brute force, combinatorics, dp	3200	x444
744C	Hongcow Buys a Deck of Cards bitmasks, brute force, dp	2400	x1037
744B	Hongcow's Game bitmasks, divide and conquer, interactive	1900	x1711
743E	Vladik and cards binary search, bitmasks, brute force, dp	2200	x1484
743B	Chloe and the sequence binary search, bitmasks, constructive algorithms, implementation	1200	x14432
734F	Anton and School bitmasks, constructive algorithms, implementation, math	2500	x1285
724G	Xor-matic Number of the Graph bitmasks, graphs, math, number theory, trees	2600	x1012
718E	Matvey's Birthday bitmasks, graphs	3300	x351
707D	Persistent Bookcase bitmasks, data structures, dfs and similar, implementation	2200	x2628
706D	Vasiliy's Multiset binary search, bitmasks, data structures, trees	1800	x9704
698C	LRU bitmasks, dp, math, probabilities	2400	x1284
685E	Travelling Through the Snow Queen's Kingdom bitmasks, brute force, divide and conquer, graphs	2800	x506
678E	Another Sith Tournament bitmasks, dp, math, probabilities	2200	x2127
677C	Vanya and Label bitmasks, combinatorics, implementation, strings	1500	x6331
662C	Binary Table bitmasks, brute force, divide and conquer, dp, fft, math	2600	x1981
662A	Gambling Nim bitmasks, math, matrices, probabilities	2400	x450
633G	Yash And Trees bitmasks, data structures, dfs and similar, math, number theory	2800	x765
620E	New Year Tree bitmasks, data structures, trees	2100	x5354
611B	New Year and Old Property bitmasks, brute force, implementation	1300	x9926
599E	Sandy and Nuts bitmasks, dp, trees	2600	x627
582E	Boolean Function bitmasks, dp, expression parsing	3000	x481
581D	Three Logos bitmasks, brute force, constructive algorithms, geometry, implementation, math	1700	x3533
580D	Kefa and Dishes bitmasks, dp	1800	x9380
579A	Raising Bacteria bitmasks	1000	x58332
575C	Party bitmasks, brute force, graph matchings	2700	x219
570D	Tree Requests binary search, bitmasks, constructive algorithms, dfs and similar, graphs, trees	2200	x6812
566E	Restoring Map bitmasks, constructive algorithms, trees	3200	x603
550B	Preparing Olympiad bitmasks, brute force	1400	x20206
547C	Mike and Foam bitmasks, combinatorics, dp, math, number theory	2300	x2762
543C	Remembering Strings bitmasks, dp	2500	x1369
535B	Tavas and SaDDas bitmasks, brute force, combinatorics, implementation	1100	x22058
534F	Simplified Nonogram bitmasks, dp, hashing, meet-in-the-middle	2400	x446
528D	Fuzzy Search bitmasks, brute force, fft	2500	x2104
525E	Anya and Cubes binary search, bitmasks, brute force, dp, math, meet-in-the-middle	2100	x3026
513C	Second price auction bitmasks, probabilities	2000	x1527
513B2	Permutations bitmasks, divide and conquer, math	1800	x2575
510D	Fox And Jumping bitmasks, brute force, dp, math	1900	x5245
504D	Misha and XOR bitmasks	2700	x300
484A	Bits bitmasks, constructive algorithms	1700	x10969
482C	Game with Strings bitmasks, dp, probabilities	2600	x887
476B	Dreamoon and WiFi bitmasks, brute force, combinatorics, dp, math, probabilities	1300	x29750
472G	Design Tutorial: Increase the Constraints bitmasks, data structures, fft	2800	x395
467B	Fedor and New Game bitmasks, brute force, constructive algorithms, implementation	1100	x36776
453B	Little Pony and Harmony Chest bitmasks, brute force, dp	2000	x4603
451E	Devu and Flowers bitmasks, combinatorics, number theory	2300	x3397
449D	Jzzhu and Numbers bitmasks, combinatorics, dp	2400	x4206
442A	Borya and Hanabi bitmasks, brute force, implementation	1700	x2098
441E	Valera and Number bitmasks, dp, math, probabilities	2400	x682
437B	The Child and Set bitmasks, greedy, implementation, sortings	1500	x9309
431D	Random Task binary search, bitmasks, combinatorics, dp, math	2100	x2287
429C	Guess the Tree bitmasks, constructive algorithms, dp, greedy, trees	2300	x933
425B	Sereja and Table bitmasks, greedy	2200	x1284
417D	Cunning Gena bitmasks, dp, greedy, sortings	1900	x2394
413D	2048 bitmasks, dp	2000	x777