Problemset - Codeforces

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Codeforces Round 940 (Div. 2) and CodeCraft-23
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bitmasks

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Problems

#	Name
1202A	You Are Given Two Binary Strings... bitmasks, greedy	1100	x8731
1658D1	388535 (Easy Version) bitmasks, math	1600	x8725
1152B	Neko Performs Cat Furrier Transform bitmasks, constructive algorithms, dfs and similar, math	1300	x8704
1225C	p-binary bitmasks, brute force, math	1600	x8632
1554C	Mikasa binary search, bitmasks, greedy, implementation	1800	x8480
242E	XOR on Segment bitmasks, data structures	2000	x8344
1557C	Moamen and XOR bitmasks, combinatorics, dp, math, matrices	1700	x8293
1801A	The Very Beautiful Blanket bitmasks, constructive algorithms	1600	x8054
1338B	Edge Weight Assignment bitmasks, constructive algorithms, dfs and similar, greedy, math, trees	1800	x8025
1332D	Walk on Matrix bitmasks, constructive algorithms, math	1700	x7803
913C	Party Lemonade bitmasks, dp, greedy	1600	x7730
1778C	Flexible String bitmasks, brute force, strings	1600	x7596
1592C	Bakry and Partitioning bitmasks, constructive algorithms, dfs and similar, dp, graphs, trees	1700	x7575
1340B	Nastya and Scoreboard bitmasks, dp, graphs, greedy	1700	x7562
1543D1	RPD and Rap Sheet (Easy Version) bitmasks, constructive algorithms, interactive, math	1700	x7417
1285D	Dr. Evil Underscores bitmasks, brute force, dfs and similar, divide and conquer, dp, greedy, strings, trees	1900	x7311
224B	Array bitmasks, implementation, two pointers	1500	x7137
1051D	Bicolorings bitmasks, dp	1700	x7084
1217C	The Number Of Good Substrings binary search, bitmasks, brute force	1700	x7078
1829H	Don't Blame Me bitmasks, combinatorics, dp, math	1700	x6955
1922E	Increasing Subsequences bitmasks, constructive algorithms, divide and conquer, greedy, math	1800	x6924
1466E	Apollo versus Pan bitmasks, brute force, math	1800	x6919
1950F	0, 1, 2, Tree! bitmasks, brute force, greedy, implementation, trees	1700	x6881
1491D	Zookeeper and The Infinite Zoo bitmasks, constructive algorithms, dp, greedy, math	1800	x6847
1883E	Look Back bitmasks, greedy	1700	x6832
1760G	SlavicG's Favorite Problem bitmasks, dfs and similar, graphs	1700	x6825
1303D	Fill The Bag bitmasks, greedy	1900	x6749
1552D	Array Differentiation bitmasks, brute force, constructive algorithms, dfs and similar, dp, graphs, math	1800	x6670
1288D	Minimax Problem binary search, bitmasks, dp	2000	x6650
570D	Tree Requests binary search, bitmasks, constructive algorithms, dfs and similar, graphs, trees	2200	x6608
888E	Maximum Subsequence bitmasks, divide and conquer, meet-in-the-middle	1800	x6556
1879D	Sum of XOR Functions bitmasks, combinatorics, divide and conquer, dp, math	1700	x6469
1556D	Take a Guess bitmasks, constructive algorithms, interactive, math	1800	x6440
1936A	Bitwise Operation Wizard bitmasks, constructive algorithms, greedy, interactive, math	1700	x6376
1868B1	Candy Party (Easy Version) bitmasks, constructive algorithms, graphs, greedy, implementation, math	1700	x6376
1329B	Dreamoon Likes Sequences bitmasks, combinatorics, math	1700	x6346
1205B	Shortest Cycle bitmasks, brute force, graphs, shortest paths	1900	x6278
677C	Vanya and Label bitmasks, combinatorics, implementation, strings	1500	x6266
1721D	Maximum AND bitmasks, dfs and similar, divide and conquer, greedy, sortings	1800	x6248
165E	Compatible Numbers bitmasks, brute force, dfs and similar, dp	2200	x6142
1470B	Strange Definition bitmasks, graphs, hashing, math, number theory	1900	x6127
1635D	Infinite Set bitmasks, dp, math, matrices, number theory, strings	1800	x5971
1492D	Genius's Gambit bitmasks, constructive algorithms, greedy, math	1900	x5918
1560F1	Nearest Beautiful Number (easy version) binary search, bitmasks, brute force, constructive algorithms, dfs and similar, greedy	1900	x5885
1792D	Fixed Prefix Permutations binary search, bitmasks, data structures, hashing, math, sortings	1700	x5842
1720D1	Xor-Subsequence (easy version) bitmasks, brute force, dp, strings, trees, two pointers	1800	x5695
1207E	XOR Guessing bitmasks, interactive, math	1900	x5586
1862F	Magic Will Save the World binary search, bitmasks, brute force, dp	1800	x5580
1732C1	Sheikh (Easy version) binary search, bitmasks, greedy, two pointers	1800	x5533
1895D	XOR Construction bitmasks, constructive algorithms, data structures, math, string suffix structures, trees	1900	x5497
1624G	MinOr Tree bitmasks, dfs and similar, dsu, graphs, greedy	1900	x5494
878A	Short Program bitmasks, constructive algorithms	1600	x5254
1851F	Lisa and the Martians bitmasks, greedy, math, strings, trees	1800	x5233
1582F1	Korney Korneevich and XOR (easy version) bitmasks, dp, greedy	1800	x5222
961C	Chessboard bitmasks, brute force, implementation	1400	x5214
1543C	Need for Pink Slips bitmasks, brute force, dfs and similar, implementation, math, probabilities	1900	x5178
510D	Fox And Jumping bitmasks, brute force, dp, math	1900	x5157
1415D	XOR-gun bitmasks, brute force, constructive algorithms	2000	x5147
620E	New Year Tree bitmasks, data structures, trees	2100	x5128
27B	Tournament bitmasks, brute force, dfs and similar, greedy	1300	x5122
895C	Square Subsets bitmasks, combinatorics, dp, math	2000	x5089
812B	Sagheer, the Hausmeister bitmasks, brute force, dp	1600	x5066
1903D1	Maximum And Queries (easy version) binary search, bitmasks, brute force, greedy	1700	x4985
1391D	505 bitmasks, brute force, constructive algorithms, dp, greedy, implementation	2000	x4912
1882D	Tree XOR bitmasks, dfs and similar, dp, greedy, trees	1900	x4899
1715D	2+ doors 2-sat, bitmasks, graphs, greedy	1900	x4886
1383B	GameGame bitmasks, constructive algorithms, dp, games, greedy, math	1900	x4736
1780D	Bit Guessing Game binary search, bitmasks, constructive algorithms, interactive	1800	x4625
1006F	Xor-Paths bitmasks, brute force, dp, meet-in-the-middle	2100	x4610
1174D	Ehab and the Expected XOR Problem bitmasks, constructive algorithms	1900	x4585
16E	Fish bitmasks, dp, probabilities	1900	x4585
868C	Qualification Rounds bitmasks, brute force, constructive algorithms, dp	1500	x4517
453B	Little Pony and Harmony Chest bitmasks, brute force, dp	2000	x4511
1747D	Yet Another Problem binary search, bitmasks, constructive algorithms, data structures	1900	x4455
11D	A Simple Task bitmasks, dp, graphs	2200	x4400
244B	Undoubtedly Lucky Numbers bitmasks, brute force, dfs and similar	1600	x4354
1360H	Binary Median binary search, bitmasks, brute force, constructive algorithms	2100	x4275
877E	Danil and a Part-time Job bitmasks, data structures, trees	2000	x4222
1560F2	Nearest Beautiful Number (hard version) bitmasks, brute force, constructive algorithms, dfs and similar, dp, greedy	2100	x4183
1451E1	Bitwise Queries (Easy Version) bitmasks, constructive algorithms, interactive, math	2000	x4176
1416C	XOR Inverse bitmasks, data structures, divide and conquer, dp, greedy, math, sortings, strings, trees	2000	x4154
1438D	Powerful Ksenia bitmasks, constructive algorithms, math	2200	x4051
449D	Jzzhu and Numbers bitmasks, combinatorics, dp	2400	x4036
1618F	Reverse bitmasks, constructive algorithms, dfs and similar, implementation, math, strings	2000	x4008
1846G	Rudolf and CodeVid-23 bitmasks, dp, graphs, greedy, shortest paths	1900	x3995
401D	Roman and Numbers bitmasks, brute force, combinatorics, dp, number theory	2000	x3956
1144E	Median String bitmasks, math, number theory, strings	1900	x3897
1322B	Present binary search, bitmasks, constructive algorithms, data structures, math, sortings	2100	x3881
888G	Xor-MST bitmasks, constructive algorithms, data structures	2300	x3853
960C	Subsequence Counting bitmasks, constructive algorithms, greedy, implementation	1700	x3805
243A	The Brand New Function bitmasks	1600	x3779
1946D	Birthday Gift bitmasks, brute force, constructive algorithms, greedy, implementation	1900	x3772
1600J	Robot Factory bitmasks, dfs and similar	1400	x3765
1220D	Alex and Julian bitmasks, math, number theory	1900	x3684
1665D	GCD Guess bitmasks, chinese remainder theorem, constructive algorithms, games, interactive, math, number theory	2000	x3670
1800F	Dasha and Nightmares bitmasks, hashing, meet-in-the-middle, strings	1900	x3656
1900D	Small GCD bitmasks, brute force, dp, math, number theory	2000	x3636
1680E	Moving Chips bitmasks, dp, greedy	2000	x3613
114B	PFAST Inc. bitmasks, brute force, graphs	1500	x3489
581D	Three Logos bitmasks, brute force, constructive algorithms, geometry, implementation, math	1700	x3406