Problemset - Codeforces

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Codeforces Round (Div. 2)
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bitmasks

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Problems

#	Name
938G	Shortest Path Queries bitmasks, data structures, dsu, graphs	2900	x865
938F	Erasing Substrings bitmasks, dp, greedy	2700	x474
920G	List Of Integers binary search, bitmasks, brute force, combinatorics, math, number theory	2200	x1696
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	x904
914F	Substrings in a String bitmasks, brute force, data structures, string suffix structures, strings	3000	x1475
914E	Palindromes in a Tree bitmasks, data structures, divide and conquer, trees	2400	x1425
913E	Logical Expression bitmasks, dp, shortest paths	2400	x761
913C	Party Lemonade bitmasks, dp, greedy	1600	x7780
912B	New Year's Eve bitmasks, constructive algorithms, number theory	1300	x11657
908E	New Year and Entity Enumeration bitmasks, combinatorics, dp, math	2500	x745
906C	Party bitmasks, brute force, dp, graphs	2400	x1187
903F	Clear The Matrix bitmasks, dp	2200	x627
900D	Unusual Sequences bitmasks, combinatorics, dp, math, number theory	2000	x3042
895C	Square Subsets bitmasks, combinatorics, dp, math	2000	x5223
888G	Xor-MST bitmasks, constructive algorithms, data structures	2300	x4027
888E	Maximum Subsequence bitmasks, divide and conquer, meet-in-the-middle	1800	x6808
878D	Magic Breeding bitmasks	2900	x645
878A	Short Program bitmasks, constructive algorithms	1600	x5338
877E	Danil and a Part-time Job bitmasks, data structures, trees	2000	x4300
875D	High Cry binary search, bitmasks, combinatorics, data structures, divide and conquer	2200	x2075
868D	Huge Strings bitmasks, brute force, dp, implementation, strings	2200	x894
868C	Qualification Rounds bitmasks, brute force, constructive algorithms, dp	1500	x4571
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	x1669
850E	Random Elections bitmasks, brute force, divide and conquer, fft, math	2800	x382
850C	Arpa and a game with Mojtaba bitmasks, dp, games	2200	x1389
845F	Guards In The Storehouse bitmasks, dp	2500	x427
817E	Choosing The Commander bitmasks, data structures, trees	2000	x2754
812B	Sagheer, the Hausmeister bitmasks, brute force, dp	1600	x5123
803F	Coprime Subsequences bitmasks, combinatorics, number theory	2000	x3093
796F	Sequence Recovery bitmasks, data structures, greedy	2800	x173
792D	Paths in a Complete Binary Tree bitmasks, trees	1900	x2922
780F	Axel and Marston in Bitland bitmasks, dp, graphs, matrices	2400	x1030
778B	Bitwise Formula bitmasks, brute force, dfs and similar, expression parsing, implementation	1800	x2278
776G	Sherlock and the Encrypted Data bitmasks, combinatorics, dp	2900	x334
772D	Varying Kibibits bitmasks, dp	2700	x575
769D	k-Interesting Pairs Of Integers *special problem, bitmasks, brute force, meet-in-the-middle	1700	x2256
768E	Game of Stones bitmasks, dp, games	2100	x2713
766E	Mahmoud and a xor trip bitmasks, constructive algorithms, data structures, dfs and similar, dp, math, trees	2100	x2895
757D	Felicity's Big Secret Revealed bitmasks, dp	2200	x1279
755F	PolandBall and Gifts bitmasks, dp, greedy	2600	x1290
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	x1027
744B	Hongcow's Game bitmasks, divide and conquer, interactive	1900	x1710
743E	Vladik and cards binary search, bitmasks, brute force, dp	2200	x1484
743B	Chloe and the sequence binary search, bitmasks, constructive algorithms, implementation	1200	x14389
734F	Anton and School bitmasks, constructive algorithms, implementation, math	2500	x1283
724G	Xor-matic Number of the Graph bitmasks, graphs, math, number theory, trees	2600	x1009
718E	Matvey's Birthday bitmasks, graphs	3300	x350
707D	Persistent Bookcase bitmasks, data structures, dfs and similar, implementation	2200	x2622
706D	Vasiliy's Multiset binary search, bitmasks, data structures, trees	1800	x9642
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	x1991
677C	Vanya and Label bitmasks, combinatorics, implementation, strings	1500	x6323
662C	Binary Table bitmasks, brute force, divide and conquer, dp, fft, math	2600	x1974
662A	Gambling Nim bitmasks, math, matrices, probabilities	2400	x430
633G	Yash And Trees bitmasks, data structures, dfs and similar, math, number theory	2800	x763
620E	New Year Tree bitmasks, data structures, trees	2100	x5338
611B	New Year and Old Property bitmasks, brute force, implementation	1300	x9891
599E	Sandy and Nuts bitmasks, dp, trees	2600	x626
582E	Boolean Function bitmasks, dp, expression parsing	3000	x481
581D	Three Logos bitmasks, brute force, constructive algorithms, geometry, implementation, math	1700	x3507
580D	Kefa and Dishes bitmasks, dp	1800	x9356
579A	Raising Bacteria bitmasks	1000	x58047
575C	Party bitmasks, brute force, graph matchings	2700	x218
570D	Tree Requests binary search, bitmasks, constructive algorithms, dfs and similar, graphs, trees	2200	x6796
566E	Restoring Map bitmasks, constructive algorithms, trees	3200	x603
550B	Preparing Olympiad bitmasks, brute force	1400	x20048
547C	Mike and Foam bitmasks, combinatorics, dp, math, number theory	2300	x2748
543C	Remembering Strings bitmasks, dp	2500	x1369
535B	Tavas and SaDDas bitmasks, brute force, combinatorics, implementation	1100	x21986
534F	Simplified Nonogram bitmasks, dp, hashing, meet-in-the-middle	2400	x445
528D	Fuzzy Search bitmasks, brute force, fft	2500	x2098
525E	Anya and Cubes binary search, bitmasks, brute force, dp, math, meet-in-the-middle	2100	x2877
513C	Second price auction bitmasks, probabilities	2000	x1526
513B2	Permutations bitmasks, divide and conquer, math	1800	x2571
510D	Fox And Jumping bitmasks, brute force, dp, math	1900	x5235
504D	Misha and XOR bitmasks	2700	x300
484A	Bits bitmasks, constructive algorithms	1700	x10921
482C	Game with Strings bitmasks, dp, probabilities	2600	x886
476B	Dreamoon and WiFi bitmasks, brute force, combinatorics, dp, math, probabilities	1300	x29630
472G	Design Tutorial: Increase the Constraints bitmasks, data structures, fft	2800	x394
467B	Fedor and New Game bitmasks, brute force, constructive algorithms, implementation	1100	x36636
453B	Little Pony and Harmony Chest bitmasks, brute force, dp	2000	x4582
451E	Devu and Flowers bitmasks, combinatorics, number theory	2300	x3371
449D	Jzzhu and Numbers bitmasks, combinatorics, dp	2400	x4169
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	x9290
431D	Random Task binary search, bitmasks, combinatorics, dp, math	2100	x2285
429C	Guess the Tree bitmasks, constructive algorithms, dp, greedy, trees	2300	x931
425B	Sereja and Table bitmasks, greedy	2200	x1284
417D	Cunning Gena bitmasks, dp, greedy, sortings	1900	x2391
413D	2048 bitmasks, dp	2000	x777
401D	Roman and Numbers bitmasks, brute force, combinatorics, dp, number theory	2000	x4016
400E	Inna and Binary Logic binary search, bitmasks, data structures	2100	x938