Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round 941 (Div. 1)
37:29:29
Register now »

*has extra registration

Before contest
Codeforces Round 941 (Div. 2)
37:29:29
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

bitmasks

Add tag

Problems

#	Name
1773G	Game of Questions bitmasks, combinatorics, dp, fft, math, probabilities	2800	x319
1771F	Hossam and Range Minimum Query binary search, bitmasks, data structures, hashing, probabilities, strings, trees	2500	x954
1770F	Koxia and Sequence bitmasks, combinatorics, dp, math, number theory	3100	x599
1767E	Algebra Flash bitmasks, brute force, dp, graphs, math, meet-in-the-middle, trees	2500	x830
1765A	Access Levels bitmasks, dsu, flows, graph matchings	2400	x658
1763A	Absolute Maximization bitmasks, constructive algorithms, greedy, math	800	x15223
1760G	SlavicG's Favorite Problem bitmasks, dfs and similar, graphs	1700	x6845
1748F	Circular Xor Reversal bitmasks, constructive algorithms	3000	x322
1748D	ConstructOR bitmasks, chinese remainder theorem, combinatorics, constructive algorithms, math, number theory	2100	x2653
1747D	Yet Another Problem binary search, bitmasks, constructive algorithms, data structures	1900	x4463
1743G	Antifibonacci Cut bitmasks, combinatorics, constructive algorithms, data structures, dp, hashing, math	3000	x244
1742G	Orray bitmasks, brute force, greedy, math, sortings	1500	x9755
1741G	Kirill and Company bitmasks, brute force, dfs and similar, dp, flows, graphs, shortest paths	2200	x1410
1739F	Keyboard Design bitmasks, data structures, dp, string suffix structures, strings	2600	x508
1739E	Cleaning Robot bitmasks, dp	2400	x1165
1734F	Zeros and Ones bitmasks, divide and conquer, dp, math	2500	x765
1732C2	Sheikh (Hard Version) binary search, bitmasks, brute force, greedy, implementation, two pointers	2100	x2451
1732C1	Sheikh (Easy version) binary search, bitmasks, greedy, two pointers	1800	x5550
1731C	Even Subarrays bitmasks, brute force, hashing, math, number theory	1700	x8888
1730F	Almost Sorted bitmasks, data structures, dp	2700	x409
1728G	Illumination binary search, bitmasks, brute force, combinatorics, dp, math, two pointers	2700	x407
1726B	Mainak and Interesting Sequence bitmasks, constructive algorithms, math	1100	x14603
1725F	Field Photography bitmasks, data structures, sortings	2100	x935
1725D	Deducing Sortability binary search, bitmasks, math	2900	x117
1722G	Even-Odd XOR bitmasks, constructive algorithms, greedy	1500	x10263
1721D	Maximum AND bitmasks, dfs and similar, divide and conquer, greedy, sortings	1800	x6274
1720D2	Xor-Subsequence (hard version) bitmasks, data structures, dp, strings, trees	2400	x1723
1720D1	Xor-Subsequence (easy version) bitmasks, brute force, dp, strings, trees, two pointers	1800	x5706
1716E	Swap and Maximum Block bitmasks, data structures, dfs and similar, divide and conquer, dp	2500	x1020
1715D	2+ doors 2-sat, bitmasks, graphs, greedy	1900	x4900
1713F	Lost Array bitmasks, combinatorics, constructive algorithms, dp, math	2900	x506
1710C	XOR Triangle bitmasks, brute force, constructive algorithms, dp, greedy, math	2500	x1267
1709F	Multiset of Strings bitmasks, brute force, dp, fft, flows, graphs, math, meet-in-the-middle, trees	2500	x531
1709E	XOR Tree bitmasks, data structures, dfs and similar, dsu, greedy, trees	2400	x2426
1707F	Bugaboo bitmasks, constructive algorithms, dp, number theory	3500	x144
1705F	Mark and the Online Exam bitmasks, constructive algorithms, interactive, probabilities	2900	x572
1705E	Mark and Professor Koro binary search, bitmasks, brute force, combinatorics, data structures, greedy	2300	x1977
1703G	Good Key, Bad Key bitmasks, brute force, dp, greedy, math	1600	x9949
1699B	Almost Ternary Matrix bitmasks, constructive algorithms, matrices	900	x19136
1698G	Long Binary String bitmasks, math, matrices, meet-in-the-middle, number theory	2900	x300
1698A	XOR Mixup bitmasks, brute force	800	x27726
1696A	NIT orz! bitmasks, greedy	800	x18071
1689E	ANDfinity bitmasks, brute force, constructive algorithms, dfs and similar, dsu, graphs	2500	x1145
1688B	Patchouli's Magical Talisman bitmasks, constructive algorithms, greedy, sortings	800	x17835
1688A	Cirno's Perfect Bitmasks Classroom bitmasks, brute force	800	x20582
1682B	AND Sorting bitmasks, constructive algorithms, sortings	1100	x17095
1680E	Moving Chips bitmasks, dp, greedy	2000	x3621
1679F	Formalism for Formalism bitmasks, dp, math	2600	x494
1679E	Typical Party in Dorm bitmasks, combinatorics, dp, strings	2400	x1093
1673F	Anti-Theft Road Planning bitmasks, constructive algorithms, divide and conquer, greedy, interactive, math	2400	x766
1673E	Power or XOR? bitmasks, combinatorics, math, number theory	2500	x658
1670F	Jee, You See? bitmasks, combinatorics, dp	2400	x915
1670E	Hemose on the Tree bitmasks, constructive algorithms, dfs and similar, trees	2200	x1663
1669H	Maximal AND bitmasks, greedy, math	1300	x16048
1665E	MinimizOR bitmasks, brute force, data structures, divide and conquer, greedy, implementation, two pointers	2500	x1421
1665D	GCD Guess bitmasks, chinese remainder theorem, constructive algorithms, games, interactive, math, number theory	2000	x3676
1661B	Getting Zero bitmasks, brute force, dfs and similar, dp, graphs, greedy, shortest paths	1300	x16928
1659E	AND-MEX Walk bitmasks, brute force, constructive algorithms, dfs and similar, dsu, graphs	2200	x1456
1659B	Bit Flipping bitmasks, constructive algorithms, greedy, strings	1300	x10594
1658D2	388535 (Hard Version) bitmasks, brute force, data structures, math	2300	x2431
1658D1	388535 (Easy Version) bitmasks, math	1600	x8737
1654F	Minimal String Xoration bitmasks, data structures, divide and conquer, greedy, hashing, sortings, strings	2800	x1049
1646C	Factorials and Powers of Two bitmasks, brute force, constructive algorithms, dp, math	1500	x13089
1641D	Two Arrays bitmasks, brute force, combinatorics, greedy, hashing, math, two pointers	2700	x1040
1635D	Infinite Set bitmasks, dp, math, matrices, number theory, strings	1800	x5986
1635A	Min Or Sum bitmasks, greedy	800	x22025
1634B	Fortune Telling bitmasks, math	1400	x15581
1632C	Strange Test binary search, bitmasks, brute force, dp, math	1600	x12218
1632B	Roof Construction bitmasks, constructive algorithms	1000	x20751
1630A	And Matching bitmasks, constructive algorithms	1500	x14035
1625D	Binary Spiders bitmasks, data structures, implementation, math, sortings, trees	2300	x1963
1625A	Ancient Civilization bitmasks, greedy, math	800	x16933
1624G	MinOr Tree bitmasks, dfs and similar, dsu, graphs, greedy	1900	x5515
1622E	Math Test bitmasks, brute force, greedy	2200	x1829
1620G	Subsequences Galore bitmasks, combinatorics, dp	2400	x854
1618F	Reverse bitmasks, constructive algorithms, dfs and similar, implementation, math, strings	2000	x4015
1616H	Keep XOR Low bitmasks, combinatorics, data structures, divide and conquer, dp, math	3000	x778
1615D	X(or)-mas Tree bitmasks, dfs and similar, dsu, graphs, trees	2200	x1836
1615B	And It's Non-Zero bitmasks, greedy, math	1300	x15150
1614C	Divan and bitwise operations bitmasks, combinatorics, constructive algorithms, dp, math	1500	x9899
1609E	William The Oblivious bitmasks, data structures, dp, matrices	2400	x1835
1605D	Treelabeling bitmasks, constructive algorithms, dfs and similar, games, greedy, implementation, trees	2100	x2831
1601A	Array Elimination bitmasks, greedy, math, number theory	1300	x13124
1600J	Robot Factory bitmasks, dfs and similar	1400	x3769
1599J	Bob's Beautiful Array bitmasks, brute force, greedy	2600	x283
1598F	RBS binary search, bitmasks, brute force, data structures, dp	2400	x1322
1594B	Special Numbers bitmasks, math	1100	x18774
1592E	Bored Bakry bitmasks, greedy, math, two pointers	2400	x1542
1592C	Bakry and Partitioning bitmasks, constructive algorithms, dfs and similar, dp, graphs, trees	1700	x7582
1584F	Strange LCS bitmasks, dp, graphs, greedy, strings	2600	x836
1583F	Defender of Childhood Dreams bitmasks, constructive algorithms, divide and conquer	2500	x1219
1582F1	Korney Korneevich and XOR (easy version) bitmasks, dp, greedy	1800	x5237
1571E	Fix the String *special problem, bitmasks, dp, greedy	1700	x319
1569E	Playoff Restoration bitmasks, brute force, hashing, implementation, meet-in-the-middle	2600	x783
1567C	Carrying Conundrum bitmasks, combinatorics, dp, math	1600	x11817
1567B	MEXor Mixup bitmasks, greedy	1000	x21351
1566C	MAX-MEX Cut bitmasks, constructive algorithms, dp, greedy	1000	x16979
1566B	MIN-MEX Cut bitmasks, constructive algorithms, dp, greedy	800	x19057
1560F2	Nearest Beautiful Number (hard version) bitmasks, brute force, constructive algorithms, dfs and similar, dp, greedy	2100	x4186
1560F1	Nearest Beautiful Number (easy version) binary search, bitmasks, brute force, constructive algorithms, dfs and similar, greedy	1900	x5897