Problemset - Codeforces

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Codeforces Round 941 (Div. 1)
28:12:33
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Before contest
Codeforces Round 941 (Div. 2)
28:12:33
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bitmasks

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Problems

#	Name
1322B	Present binary search, bitmasks, constructive algorithms, data structures, math, sortings	2100	x3893
1560F2	Nearest Beautiful Number (hard version) bitmasks, brute force, constructive algorithms, dfs and similar, dp, greedy	2100	x4186
1360H	Binary Median binary search, bitmasks, brute force, constructive algorithms	2100	x4276
1006F	Xor-Paths bitmasks, brute force, dp, meet-in-the-middle	2100	x4624
620E	New Year Tree bitmasks, data structures, trees	2100	x5164
63E	Sweets Game bitmasks, dfs and similar, dp, games, implementation	2000	x713
413D	2048 bitmasks, dp	2000	x749
379D	New Year Letter bitmasks, brute force, dp	2000	x1482
513C	Second price auction bitmasks, probabilities	2000	x1516
916B	Jamie and Binary Sequence (changed after round) bitmasks, greedy, math	2000	x1668
1102F	Elongated Matrix binary search, bitmasks, brute force, dp, graphs	2000	x1899
817E	Choosing The Commander bitmasks, data structures, trees	2000	x2681
1209E1	Rotate Columns (easy version) bitmasks, brute force, dp, greedy, sortings	2000	x2713
1088D	Ehab and another another xor problem bitmasks, constructive algorithms, implementation, interactive	2000	x2754
1956D	Nene and the Mex Operator bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math	2000	x2832
1030E	Vasya and Good Sequences bitmasks, dp	2000	x2967
900D	Unusual Sequences bitmasks, combinatorics, dp, math, number theory	2000	x2969
803F	Coprime Subsequences bitmasks, combinatorics, number theory	2000	x2981
8C	Looking for Order bitmasks, dp	2000	x3240
1680E	Moving Chips bitmasks, dp, greedy	2000	x3621
1900D	Small GCD bitmasks, brute force, dp, math, number theory	2000	x3664
1665D	GCD Guess bitmasks, chinese remainder theorem, constructive algorithms, games, interactive, math, number theory	2000	x3677
401D	Roman and Numbers bitmasks, brute force, combinatorics, dp, number theory	2000	x3965
1618F	Reverse bitmasks, constructive algorithms, dfs and similar, implementation, math, strings	2000	x4015
1416C	XOR Inverse bitmasks, data structures, divide and conquer, dp, greedy, math, sortings, strings, trees	2000	x4161
1451E1	Bitwise Queries (Easy Version) bitmasks, constructive algorithms, interactive, math	2000	x4182
877E	Danil and a Part-time Job bitmasks, data structures, trees	2000	x4231
453B	Little Pony and Harmony Chest bitmasks, brute force, dp	2000	x4516
1391D	505 bitmasks, brute force, constructive algorithms, dp, greedy, implementation	2000	x4920
895C	Square Subsets bitmasks, combinatorics, dp, math	2000	x5104
1415D	XOR-gun bitmasks, brute force, constructive algorithms	2000	x5158
1288D	Minimax Problem binary search, bitmasks, dp	2000	x6657
242E	XOR on Segment bitmasks, data structures	2000	x8374
309C	Memory for Arrays binary search, bitmasks, greedy	1900	x1286
232B	Table bitmasks, combinatorics, dp, math	1900	x1386
285D	Permutation Sum bitmasks, combinatorics, dp, implementation, meet-in-the-middle	1900	x1506
744B	Hongcow's Game bitmasks, divide and conquer, interactive	1900	x1706
993B	Open Communication bitmasks, brute force	1900	x1928
417D	Cunning Gena bitmasks, dp, greedy, sortings	1900	x2372
388B	Fox and Minimal path bitmasks, constructive algorithms, graphs, implementation, math	1900	x2431
792D	Paths in a Complete Binary Tree bitmasks, trees	1900	x2897
981D	Bookshelves bitmasks, dp, greedy	1900	x3156
1777D	Score of a Tree bitmasks, combinatorics, dfs and similar, dp, math, probabilities, trees	1900	x3199
1950G	Shuffling Songs bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings	1900	x3254
959E	Mahmoud and Ehab and the xor-MST bitmasks, dp, graphs, implementation, math	1900	x3301
1017D	The Wu bitmasks, brute force, data structures	1900	x3330
1800F	Dasha and Nightmares bitmasks, hashing, meet-in-the-middle, strings	1900	x3670
1220D	Alex and Julian bitmasks, math, number theory	1900	x3684
1946D	Birthday Gift bitmasks, brute force, constructive algorithms, greedy, implementation	1900	x3877
1144E	Median String bitmasks, math, number theory, strings	1900	x3991
1846G	Rudolf and CodeVid-23 bitmasks, dp, graphs, greedy, shortest paths	1900	x4021
1747D	Yet Another Problem binary search, bitmasks, constructive algorithms, data structures	1900	x4463
1174D	Ehab and the Expected XOR Problem bitmasks, constructive algorithms	1900	x4592
16E	Fish bitmasks, dp, probabilities	1900	x4603
1383B	GameGame bitmasks, constructive algorithms, dp, games, greedy, math	1900	x4753
1715D	2+ doors 2-sat, bitmasks, graphs, greedy	1900	x4901
1882D	Tree XOR bitmasks, dfs and similar, dp, greedy, trees	1900	x4935
510D	Fox And Jumping bitmasks, brute force, dp, math	1900	x5167
1543C	Need for Pink Slips bitmasks, brute force, dfs and similar, implementation, math, probabilities	1900	x5179
1624G	MinOr Tree bitmasks, dfs and similar, dsu, graphs, greedy	1900	x5515
1895D	XOR Construction bitmasks, constructive algorithms, data structures, math, string suffix structures, trees	1900	x5528
1207E	XOR Guessing bitmasks, interactive, math	1900	x5595
1560F1	Nearest Beautiful Number (easy version) binary search, bitmasks, brute force, constructive algorithms, dfs and similar, greedy	1900	x5897
1492D	Genius's Gambit bitmasks, constructive algorithms, greedy, math	1900	x5921
1470B	Strange Definition bitmasks, graphs, hashing, math, number theory	1900	x6139
1205B	Shortest Cycle bitmasks, brute force, graphs, shortest paths	1900	x6282
1303D	Fill The Bag bitmasks, greedy	1900	x6797
1285D	Dr. Evil Underscores bitmasks, brute force, dfs and similar, divide and conquer, dp, greedy, strings, trees	1900	x7323
1912K	Kim's Quest bitmasks, combinatorics, dp	1800	x1977
778B	Bitwise Formula bitmasks, brute force, dfs and similar, expression parsing, implementation	1800	x2253
513B2	Permutations bitmasks, divide and conquer, math	1800	x2561
1780D	Bit Guessing Game binary search, bitmasks, constructive algorithms, interactive	1800	x4628
1582F1	Korney Korneevich and XOR (easy version) bitmasks, dp, greedy	1800	x5237
1851F	Lisa and the Martians bitmasks, greedy, math, strings, trees	1800	x5265
1732C1	Sheikh (Easy version) binary search, bitmasks, greedy, two pointers	1800	x5550
1862F	Magic Will Save the World binary search, bitmasks, brute force, dp	1800	x5611
1720D1	Xor-Subsequence (easy version) bitmasks, brute force, dp, strings, trees, two pointers	1800	x5707
1635D	Infinite Set bitmasks, dp, math, matrices, number theory, strings	1800	x5986
1721D	Maximum AND bitmasks, dfs and similar, divide and conquer, greedy, sortings	1800	x6275
1556D	Take a Guess bitmasks, constructive algorithms, interactive, math	1800	x6458
888E	Maximum Subsequence bitmasks, divide and conquer, meet-in-the-middle	1800	x6580
1552D	Array Differentiation bitmasks, brute force, constructive algorithms, dfs and similar, dp, graphs, math	1800	x6674
1491D	Zookeeper and The Infinite Zoo bitmasks, constructive algorithms, dp, greedy, math	1800	x6869
1466E	Apollo versus Pan bitmasks, brute force, math	1800	x6933
1922E	Increasing Subsequences bitmasks, constructive algorithms, divide and conquer, greedy, math	1800	x6964
1338B	Edge Weight Assignment bitmasks, constructive algorithms, dfs and similar, greedy, math, trees	1800	x8039
1554C	Mikasa binary search, bitmasks, greedy, implementation	1800	x8498
580D	Kefa and Dishes bitmasks, dp	1800	x9123
706D	Vasiliy's Multiset binary search, bitmasks, data structures, trees	1800	x9234
1571E	Fix the String *special problem, bitmasks, dp, greedy	1700	x319
442A	Borya and Hanabi bitmasks, brute force, implementation	1700	x2092
769D	k-Interesting Pairs Of Integers *special problem, bitmasks, brute force, meet-in-the-middle	1700	x2208
581D	Three Logos bitmasks, brute force, constructive algorithms, geometry, implementation, math	1700	x3411
1146C	Tree Diameter bitmasks, graphs, interactive	1700	x3464
960C	Subsequence Counting bitmasks, constructive algorithms, greedy, implementation	1700	x3807
1903D1	Maximum And Queries (easy version) binary search, bitmasks, brute force, greedy	1700	x5016
1792D	Fixed Prefix Permutations binary search, bitmasks, data structures, hashing, math, sortings	1700	x5858
1329B	Dreamoon Likes Sequences bitmasks, combinatorics, math	1700	x6350
1868B1	Candy Party (Easy Version) bitmasks, constructive algorithms, graphs, greedy, implementation, math	1700	x6405
1936A	Bitwise Operation Wizard bitmasks, constructive algorithms, greedy, interactive, math	1700	x6456