Problemset - Codeforces

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Before contest
Codeforces Round 941 (Div. 1)
4 days

Before contest
Codeforces Round 941 (Div. 2)
4 days

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bitmasks

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Problems

#	Name
865F	Egg Roulette bitmasks, brute force, divide and conquer, math, meet-in-the-middle	3300	x67
1302F	Keep talking and nobody explodes -- easy bitmasks, brute force, expression parsing		x72
1533H	Submatrices *special problem, bitmasks, data structures, dp		x80
1097H	Mateusz and an Infinite Sequence bitmasks, brute force, dp, strings	3400	x92
1423I	Lookup Tables bitmasks	3000	x101
336E	Vasily the Bear and Painting Square bitmasks, combinatorics, dp, implementation	2700	x109
1725D	Deducing Sortability binary search, bitmasks, math	2900	x117
865E	Hex Dyslexia bitmasks, brute force, dp, graphs	3300	x118
1835F	Good Graph bitmasks, dfs and similar, graph matchings, graphs, implementation	3500	x137
1707F	Bugaboo bitmasks, constructive algorithms, dp, number theory	3500	x144
1861F	Four Suits binary search, bitmasks, flows, greedy	3200	x146
1804H	Code Lock bitmasks, dp	3300	x168
796F	Sequence Recovery bitmasks, data structures, greedy	2800	x169
1515H	Phoenix and Bits bitmasks, brute force, data structures, sortings	3500	x209
575C	Party bitmasks, brute force, graph matchings	2700	x211
1439E	Cheat and Win bitmasks, data structures, games, trees	3500	x214
1450G	Communism bitmasks, dp, trees	3500	x227
97D	Robot in Basement bitmasks, brute force, implementation	2700	x229
1743G	Antifibonacci Cut bitmasks, combinatorics, constructive algorithms, data structures, dp, hashing, math	3000	x244
217D	Bitonix' Patrol bitmasks, brute force, combinatorics, dfs and similar, math	2900	x244
1016G	Appropriate Team bitmasks, math, number theory	2700	x253
76C	Mutation bitmasks, dp, math	2700	x267
1799H	Tree Cutting bitmasks, dfs and similar, dp	3200	x270
1214G	Feeling Good bitmasks, data structures	3200	x279
1599J	Bob's Beautiful Array bitmasks, brute force, greedy	2600	x283
1336E2	Chiori and Doll Picking (hard version) bitmasks, brute force, combinatorics, math	3500	x283
1027G	X-mouse in the Campus bitmasks, math, number theory	2600	x293
1292F	Nora's Toy Boxes bitmasks, combinatorics, dp	3500	x297
504D	Misha and XOR bitmasks	2700	x297
1698G	Long Binary String bitmasks, math, matrices, meet-in-the-middle, number theory	2900	x300
1556G	Gates to Another World bitmasks, data structures, dsu, two pointers	3300	x302
1952I	Dark Matter bitmasks, geometry		x308
1773G	Game of Questions bitmasks, combinatorics, dp, fft, math, probabilities	2800	x318
1571E	Fix the String *special problem, bitmasks, dp, greedy	1700	x319
212B	Polycarpus is Looking for Good Substrings bitmasks, hashing, implementation	2300	x321
1748F	Circular Xor Reversal bitmasks, constructive algorithms	3000	x322
776G	Sherlock and the Encrypted Data bitmasks, combinatorics, dp	2900	x327
718E	Matvey's Birthday bitmasks, graphs	3300	x332
1334G	Substring Search bitmasks, brute force, fft	2900	x353
1036G	Sources and Sinks bitmasks, brute force, dfs and similar	2700	x360
107C	Arrangement bitmasks, dp	2400	x361
1033F	Boolean Computer bitmasks, brute force, fft, math	2800	x364
1261F	Xor-Set bitmasks, divide and conquer, math	3100	x370
1493F	Enchanted Matrix bitmasks, interactive, number theory	2600	x373
850E	Random Elections bitmasks, brute force, divide and conquer, fft, math	2800	x378
1519F	Chests and Keys bitmasks, brute force, dfs and similar, dp, flows	3200	x383
201D	Brand New Problem bitmasks, brute force, dp	2600	x388
472G	Design Tutorial: Increase the Constraints bitmasks, data structures, fft	2800	x390
1543E	The Final Pursuit bitmasks, constructive algorithms, divide and conquer, graphs, greedy, math	2700	x393
1523F	Favorite Game bitmasks, dp	3300	x394
1103D	Professional layer bitmasks, dp	3100	x394
1936D	Bitwise Paradox binary search, bitmasks, data structures, greedy, two pointers	3100	x397
1327G	Letters and Question Marks bitmasks, dp, string suffix structures	2800	x401
1728G	Illumination binary search, bitmasks, brute force, combinatorics, dp, math, two pointers	2700	x407
1730F	Almost Sorted bitmasks, data structures, dp	2700	x409
1299D	Around the World bitmasks, combinatorics, dfs and similar, dp, graphs, graphs, math, trees	3000	x414
845F	Guards In The Storehouse bitmasks, dp	2500	x414
1386C	Joker *special problem, bitmasks, data structures, divide and conquer, dsu	2800	x427
662A	Gambling Nim bitmasks, math, matrices, probabilities	2400	x429
534F	Simplified Nonogram bitmasks, dp, hashing, meet-in-the-middle	2400	x438
750G	New Year and Binary Tree Paths bitmasks, brute force, combinatorics, dp	3200	x439
1392G	Omkar and Pies bitmasks, dfs and similar, dp, math, shortest paths	2900	x441
251D	Two Sets bitmasks, math	2700	x441
1552G	A Serious Referee bitmasks, brute force, dfs and similar, sortings	3000	x446
354B	Game with Strings bitmasks, dp, games	2400	x448
83E	Two Subsequences bitmasks, dp	2800	x450
1906B	Button Pressing bitmasks, constructive algorithms, hashing	2600	x452
1326F2	Wise Men (Hard Version) bitmasks, dp, math	3200	x456
152E	Garden bitmasks, dp, graphs, trees	2500	x459
938F	Erasing Substrings bitmasks, dp, greedy	2700	x466
375C	Circling Round Treasures bitmasks, shortest paths	2600	x470
582E	Boolean Function bitmasks, dp, expression parsing	3000	x475
754E	Dasha and cyclic table bitmasks, brute force, fft, strings, trees	2600	x479
342D	Xenia and Dominoes bitmasks, dfs and similar, dp	2100	x487
1679F	Formalism for Formalism bitmasks, dp, math	2600	x493
685E	Travelling Through the Snow Queen's Kingdom bitmasks, brute force, divide and conquer, graphs	2800	x502
1713F	Lost Array bitmasks, combinatorics, constructive algorithms, dp, math	2900	x505
1739F	Keyboard Design bitmasks, data structures, dp, string suffix structures, strings	2600	x506
1789F	Serval and Brain Power bitmasks, brute force, dp, greedy, implementation, strings	2700	x510
1152F1	Neko Rules the Catniverse (Small Version) bitmasks, dp, matrices	2800	x510
1117F	Crisp String bitmasks, dp	2500	x513
1221G	Graph And Numbers bitmasks, brute force, combinatorics, dp, meet-in-the-middle	2900	x518
1225G	To Make 1 bitmasks, constructive algorithms, dp, greedy, number theory	3100	x521
1709F	Multiset of Strings bitmasks, brute force, dp, fft, flows, graphs, math, meet-in-the-middle, trees	2500	x526
1463F	Max Correct Set bitmasks, dp, math	3100	x550
1842H	Tenzing and Random Real Numbers bitmasks, dp, graphs, math, probabilities	3000	x555
1383C	String Transformation 2 bitmasks, dp, graphs, trees	3100	x556
1948G	MST with Matching bitmasks, brute force, dsu, graph matchings, trees	3100	x564
772D	Varying Kibibits bitmasks, dp	2700	x565
1705F	Mark and the Online Exam bitmasks, constructive algorithms, interactive, probabilities	2900	x570
1411G	No Game No Life bitmasks, games, math, matrices	2700	x576
1034E	Little C Loves 3 III bitmasks, dp, math	3200	x585
1152F2	Neko Rules the Catniverse (Large Version) bitmasks, dp, matrices	3000	x589
1930F	Maximize the Difference bitmasks, brute force, dfs and similar	2700	x596
1770F	Koxia and Sequence bitmasks, combinatorics, dp, math, number theory	3100	x596
566E	Restoring Map bitmasks, constructive algorithms, trees	3200	x600
599E	Sandy and Nuts bitmasks, dp, trees	2600	x616
367D	Sereja and Sets bitmasks, dfs and similar	2400	x616
1430G	Yet Another DAG Problem bitmasks, dfs and similar, dp, flows, graphs, math	2600	x617
903F	Clear The Matrix bitmasks, dp	2200	x622

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