Problemset - Codeforces

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Codeforces Round 941 (Div. 1)
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Codeforces Round 941 (Div. 2)
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bitmasks

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Problems

#	Name
1731C	Even Subarrays bitmasks, brute force, hashing, math, number theory	1700	x8887
1152B	Neko Performs Cat Furrier Transform bitmasks, constructive algorithms, dfs and similar, math	1300	x8799
1202A	You Are Given Two Binary Strings... bitmasks, greedy	1100	x8766
1658D1	388535 (Easy Version) bitmasks, math	1600	x8735
1225C	p-binary bitmasks, brute force, math	1600	x8638
1554C	Mikasa binary search, bitmasks, greedy, implementation	1800	x8496
242E	XOR on Segment bitmasks, data structures	2000	x8368
1557C	Moamen and XOR bitmasks, combinatorics, dp, math, matrices	1700	x8302
1801A	The Very Beautiful Blanket bitmasks, constructive algorithms	1600	x8076
1338B	Edge Weight Assignment bitmasks, constructive algorithms, dfs and similar, greedy, math, trees	1800	x8033
1332D	Walk on Matrix bitmasks, constructive algorithms, math	1700	x7807
913C	Party Lemonade bitmasks, dp, greedy	1600	x7733
1778C	Flexible String bitmasks, brute force, strings	1600	x7624
1592C	Bakry and Partitioning bitmasks, constructive algorithms, dfs and similar, dp, graphs, trees	1700	x7582
1340B	Nastya and Scoreboard bitmasks, dp, graphs, greedy	1700	x7565
1543D1	RPD and Rap Sheet (Easy Version) bitmasks, constructive algorithms, interactive, math	1700	x7422
1285D	Dr. Evil Underscores bitmasks, brute force, dfs and similar, divide and conquer, dp, greedy, strings, trees	1900	x7321
224B	Array bitmasks, implementation, two pointers	1500	x7145
1051D	Bicolorings bitmasks, dp	1700	x7112
1950F	0, 1, 2, Tree! bitmasks, brute force, greedy, implementation, trees	1700	x7110
1217C	The Number Of Good Substrings binary search, bitmasks, brute force	1700	x7082
1829H	Don't Blame Me bitmasks, combinatorics, dp, math	1700	x6990
1922E	Increasing Subsequences bitmasks, constructive algorithms, divide and conquer, greedy, math	1800	x6959
1883E	Look Back bitmasks, greedy	1700	x6954
1466E	Apollo versus Pan bitmasks, brute force, math	1800	x6931
1491D	Zookeeper and The Infinite Zoo bitmasks, constructive algorithms, dp, greedy, math	1800	x6867
1760G	SlavicG's Favorite Problem bitmasks, dfs and similar, graphs	1700	x6843
1303D	Fill The Bag bitmasks, greedy	1900	x6795
1552D	Array Differentiation bitmasks, brute force, constructive algorithms, dfs and similar, dp, graphs, math	1800	x6673
1288D	Minimax Problem binary search, bitmasks, dp	2000	x6656
570D	Tree Requests binary search, bitmasks, constructive algorithms, dfs and similar, graphs, trees	2200	x6620
888E	Maximum Subsequence bitmasks, divide and conquer, meet-in-the-middle	1800	x6573
1879D	Sum of XOR Functions bitmasks, combinatorics, divide and conquer, dp, math	1700	x6511
1556D	Take a Guess bitmasks, constructive algorithms, interactive, math	1800	x6456
1936A	Bitwise Operation Wizard bitmasks, constructive algorithms, greedy, interactive, math	1700	x6443
1868B1	Candy Party (Easy Version) bitmasks, constructive algorithms, graphs, greedy, implementation, math	1700	x6400
1329B	Dreamoon Likes Sequences bitmasks, combinatorics, math	1700	x6350
1205B	Shortest Cycle bitmasks, brute force, graphs, shortest paths	1900	x6280
1721D	Maximum AND bitmasks, dfs and similar, divide and conquer, greedy, sortings	1800	x6271
677C	Vanya and Label bitmasks, combinatorics, implementation, strings	1500	x6270
165E	Compatible Numbers bitmasks, brute force, dfs and similar, dp	2200	x6160
1470B	Strange Definition bitmasks, graphs, hashing, math, number theory	1900	x6137
1635D	Infinite Set bitmasks, dp, math, matrices, number theory, strings	1800	x5984
1492D	Genius's Gambit bitmasks, constructive algorithms, greedy, math	1900	x5919
1560F1	Nearest Beautiful Number (easy version) binary search, bitmasks, brute force, constructive algorithms, dfs and similar, greedy	1900	x5897
1792D	Fixed Prefix Permutations binary search, bitmasks, data structures, hashing, math, sortings	1700	x5857
1720D1	Xor-Subsequence (easy version) bitmasks, brute force, dp, strings, trees, two pointers	1800	x5704
1862F	Magic Will Save the World binary search, bitmasks, brute force, dp	1800	x5604
1207E	XOR Guessing bitmasks, interactive, math	1900	x5594
1732C1	Sheikh (Easy version) binary search, bitmasks, greedy, two pointers	1800	x5547
1895D	XOR Construction bitmasks, constructive algorithms, data structures, math, string suffix structures, trees	1900	x5526
1624G	MinOr Tree bitmasks, dfs and similar, dsu, graphs, greedy	1900	x5515
1851F	Lisa and the Martians bitmasks, greedy, math, strings, trees	1800	x5263
878A	Short Program bitmasks, constructive algorithms	1600	x5257
1582F1	Korney Korneevich and XOR (easy version) bitmasks, dp, greedy	1800	x5237
961C	Chessboard bitmasks, brute force, implementation	1400	x5214
1543C	Need for Pink Slips bitmasks, brute force, dfs and similar, implementation, math, probabilities	1900	x5179
510D	Fox And Jumping bitmasks, brute force, dp, math	1900	x5165
620E	New Year Tree bitmasks, data structures, trees	2100	x5163
1415D	XOR-gun bitmasks, brute force, constructive algorithms	2000	x5155
27B	Tournament bitmasks, brute force, dfs and similar, greedy	1300	x5125
895C	Square Subsets bitmasks, combinatorics, dp, math	2000	x5102
812B	Sagheer, the Hausmeister bitmasks, brute force, dp	1600	x5068
1903D1	Maximum And Queries (easy version) binary search, bitmasks, brute force, greedy	1700	x5015
1882D	Tree XOR bitmasks, dfs and similar, dp, greedy, trees	1900	x4933
1391D	505 bitmasks, brute force, constructive algorithms, dp, greedy, implementation	2000	x4920
1715D	2+ doors 2-sat, bitmasks, graphs, greedy	1900	x4900
1383B	GameGame bitmasks, constructive algorithms, dp, games, greedy, math	1900	x4751
1780D	Bit Guessing Game binary search, bitmasks, constructive algorithms, interactive	1800	x4628
1006F	Xor-Paths bitmasks, brute force, dp, meet-in-the-middle	2100	x4621
16E	Fish bitmasks, dp, probabilities	1900	x4602
1174D	Ehab and the Expected XOR Problem bitmasks, constructive algorithms	1900	x4590
868C	Qualification Rounds bitmasks, brute force, constructive algorithms, dp	1500	x4520
453B	Little Pony and Harmony Chest bitmasks, brute force, dp	2000	x4516
1747D	Yet Another Problem binary search, bitmasks, constructive algorithms, data structures	1900	x4462
11D	A Simple Task bitmasks, dp, graphs	2200	x4420
244B	Undoubtedly Lucky Numbers bitmasks, brute force, dfs and similar	1600	x4363
1360H	Binary Median binary search, bitmasks, brute force, constructive algorithms	2100	x4276
877E	Danil and a Part-time Job bitmasks, data structures, trees	2000	x4230
1560F2	Nearest Beautiful Number (hard version) bitmasks, brute force, constructive algorithms, dfs and similar, dp, greedy	2100	x4186
1451E1	Bitwise Queries (Easy Version) bitmasks, constructive algorithms, interactive, math	2000	x4181
1416C	XOR Inverse bitmasks, data structures, divide and conquer, dp, greedy, math, sortings, strings, trees	2000	x4161
1438D	Powerful Ksenia bitmasks, constructive algorithms, math	2200	x4058
449D	Jzzhu and Numbers bitmasks, combinatorics, dp	2400	x4051
1846G	Rudolf and CodeVid-23 bitmasks, dp, graphs, greedy, shortest paths	1900	x4017
1618F	Reverse bitmasks, constructive algorithms, dfs and similar, implementation, math, strings	2000	x4014
1144E	Median String bitmasks, math, number theory, strings	1900	x3975
401D	Roman and Numbers bitmasks, brute force, combinatorics, dp, number theory	2000	x3963
1322B	Present binary search, bitmasks, constructive algorithms, data structures, math, sortings	2100	x3889
888G	Xor-MST bitmasks, constructive algorithms, data structures	2300	x3871
1946D	Birthday Gift bitmasks, brute force, constructive algorithms, greedy, implementation	1900	x3859
960C	Subsequence Counting bitmasks, constructive algorithms, greedy, implementation	1700	x3806
243A	The Brand New Function bitmasks	1600	x3781
1600J	Robot Factory bitmasks, dfs and similar	1400	x3768
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	x3676
1800F	Dasha and Nightmares bitmasks, hashing, meet-in-the-middle, strings	1900	x3667
1900D	Small GCD bitmasks, brute force, dp, math, number theory	2000	x3660
1680E	Moving Chips bitmasks, dp, greedy	2000	x3620
114B	PFAST Inc. bitmasks, brute force, graphs	1500	x3511