Problemset - Codeforces

→ Pay attention

Before contest
Refact.ai Match 1 (Codeforces Round 985)
4 days
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

bitmasks

Add tag

Problems

#	Name
2036F	XORificator 3000 bitmasks, dp, number theory, two pointers		x2519
2027E2	Bit Game (Hard Version) bitmasks, dp, math	3100	x37
2020E	Expected Power bitmasks, dp, math, probabilities	2000	x2881
1995D	Cases bitmasks, brute force, dp, strings	2300	x2331
1994G	Minecraft bitmasks, brute force, dp, graphs, math	2600	x1249
1993E	Xor-Grid Problem bitmasks, constructive algorithms, dp, implementation	2700	x534
1991H	Prime Split Game bitmasks, dp, fft, games, math, number theory	3300	x501
1990D	Grid Puzzle bitmasks, brute force, dp, greedy, implementation	1800	x6252
1983G	Your Loss bitmasks, brute force, dp, trees	3000	x209
1982E	Number of k-good subarrays bitmasks, brute force, combinatorics, divide and conquer, dp, math, meet-in-the-middle	2300	x1585
1979D	Fixing a Binary String bitmasks, brute force, constructive algorithms, dp, greedy, hashing, strings	1800	x6591
1975F	Set bitmasks, brute force, combinatorics, dfs and similar, divide and conquer, dp, math	2600	x822
1973F	Maximum GCD Sum Queries bitmasks, brute force, dp, implementation, number theory	3100	x224
1970G3	Min-Fund Prison (Hard) bitmasks, dfs and similar, dp, graphs, trees	2400	x334
1967C	Fenwick Tree bitmasks, brute force, combinatorics, data structures, dp, math, trees	2300	x1768
1957D	A BIT of an Inequality bitmasks, brute force, dp, math	1900	x4486
1956D	Nene and the Mex Operator bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math	2000	x3920
1955H	The Most Reckless Defense bitmasks, brute force, constructive algorithms, dp, flows, graph matchings, shortest paths	2300	x1257
1950G	Shuffling Songs bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings	1900	x4386
1930D2	Sum over all Substrings (Hard Version) bitmasks, divide and conquer, dp, dsu, greedy, implementation, strings	2100	x2641
1929E	Sasha and the Happy Tree Cutting bitmasks, brute force, dfs and similar, dp, graphs, greedy, math, trees	2300	x1699
1926F	Vlad and Avoiding X bitmasks, brute force, dfs and similar, dp, implementation	2200	x1716
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x12022
1917F	Construct Tree bitmasks, constructive algorithms, dp, trees	2500	x974
1912K	Kim's Quest bitmasks, combinatorics, dp	1800	x2513
1903D2	Maximum And Queries (hard version) bitmasks, divide and conquer, dp, greedy	2500	x785
1900D	Small GCD bitmasks, brute force, dp, math, number theory	2000	x4271
1886E	I Wanna be the Team Leader bitmasks, constructive algorithms, dp, greedy, math, sortings, two pointers	2400	x1486
1882D	Tree XOR bitmasks, dfs and similar, dp, greedy, trees	1900	x5559
1879D	Sum of XOR Functions bitmasks, combinatorics, divide and conquer, dp, math	1700	x7515
1874B	Jellyfish and Math bitmasks, brute force, dfs and similar, dp, graphs, shortest paths	2400	x1157
1872E	Data Structures Fan binary search, bitmasks, data structures, dp	1500	x13888
1870E	Another MEX Problem bitmasks, brute force, dp, shortest paths	2300	x2387
1868B2	Candy Party (Hard Version) bitmasks, constructive algorithms, dp, greedy, implementation, math	2100	x2420
1863F	Divide, XOR, and Conquer bitmasks, dp, math	2600	x1146
1862F	Magic Will Save the World binary search, bitmasks, brute force, dp	1800	x6331
1856E2	PermuTree (hard version) bitmasks, dfs and similar, dp, fft, greedy, implementation, math, trees	2700	x1426
1854B	Earn or Unlock bitmasks, brute force, dp	2200	x3570
1848F	Vika and Wiki binary search, bitmasks, combinatorics, divide and conquer, dp, math	2400	x1634
1847C	Vampiric Powers, anyone? bitmasks, brute force, dp, greedy	1400	x12972
1846G	Rudolf and CodeVid-23 bitmasks, dp, graphs, greedy, shortest paths	1900	x4446
1842H	Tenzing and Random Real Numbers bitmasks, dp, graphs, math, probabilities	3000	x682
1829H	Don't Blame Me bitmasks, combinatorics, dp, math	1700	x7871
1826E	Walk the Runway bitmasks, brute force, data structures, dp, graphs, implementation, sortings	2400	x1617
1815D	XOR Counting bitmasks, combinatorics, dp, math	2600	x1184
1807G2	Subsequence Addition (Hard Version) bitmasks, dp, greedy, implementation, sortings	1100	x19610
1804H	Code Lock bitmasks, dp	3300	x190
1804E	Routing bitmasks, brute force, dfs and similar, dp, graphs	2400	x1473
1799H	Tree Cutting bitmasks, dfs and similar, dp	3200	x283
1789F	Serval and Brain Power bitmasks, brute force, dp, greedy, implementation, strings	2700	x720
1780F	Three Chairs bitmasks, brute force, combinatorics, data structures, dp, number theory, sortings	2300	x1503
1779F	Xorcerer's Stones bitmasks, constructive algorithms, dp, trees	2500	x1264
1777D	Score of a Tree bitmasks, combinatorics, dfs and similar, dp, math, probabilities, trees	1900	x3532
1773G	Game of Questions bitmasks, combinatorics, dp, fft, math, probabilities	2800	x375
1770F	Koxia and Sequence bitmasks, combinatorics, dp, math, number theory	3100	x675
1767E	Algebra Flash bitmasks, brute force, dp, graphs, math, meet-in-the-middle, trees	2500	x938
1743G	Antifibonacci Cut bitmasks, combinatorics, constructive algorithms, data structures, dp, hashing, math	3000	x257
1741G	Kirill and Company bitmasks, brute force, dfs and similar, dp, flows, graphs, shortest paths	2200	x1514
1739F	Keyboard Design bitmasks, data structures, dp, string suffix structures, strings	2600	x542
1739E	Cleaning Robot bitmasks, dp	2400	x1235
1734F	Zeros and Ones bitmasks, divide and conquer, dp, math	2500	x815
1730F	Almost Sorted bitmasks, data structures, dp	2700	x553
1728G	Illumination binary search, bitmasks, brute force, combinatorics, dp, math, two pointers	2700	x468
1720D2	Xor-Subsequence (hard version) bitmasks, data structures, dp, strings, trees	2400	x1863
1720D1	Xor-Subsequence (easy version) bitmasks, brute force, dp, strings, trees, two pointers	1800	x6039
1716E	Swap and Maximum Block bitmasks, data structures, dfs and similar, divide and conquer, dp	2500	x1101
1713F	Lost Array bitmasks, combinatorics, constructive algorithms, dp, math	2900	x545
1710C	XOR Triangle bitmasks, brute force, constructive algorithms, dp, greedy, math	2500	x1386
1709F	Multiset of Strings bitmasks, brute force, dp, fft, flows, graphs, math, meet-in-the-middle, trees	2500	x553
1707F	Bugaboo bitmasks, constructive algorithms, dp, number theory	3500	x152
1703G	Good Key, Bad Key bitmasks, brute force, dp, greedy, math	1600	x10790
1680E	Moving Chips bitmasks, dp, greedy	2000	x3811
1679F	Formalism for Formalism bitmasks, dp, math	2600	x544
1679E	Typical Party in Dorm bitmasks, combinatorics, dp, strings	2400	x1194
1670F	Jee, You See? bitmasks, combinatorics, dp	2400	x984
1661B	Getting Zero bitmasks, brute force, dfs and similar, dp, graphs, greedy, shortest paths	1300	x17863
1646C	Factorials and Powers of Two bitmasks, brute force, constructive algorithms, dp, math	1500	x14286
1635D	Infinite Set bitmasks, dp, math, matrices, number theory, strings	1800	x6289
1632C	Strange Test binary search, bitmasks, brute force, dp, math	1600	x12796
1620G	Subsequences Galore bitmasks, combinatorics, dp	2400	x902
1616H	Keep XOR Low bitmasks, combinatorics, data structures, divide and conquer, dp, math	3000	x980
1614C	Divan and bitwise operations bitmasks, combinatorics, constructive algorithms, dp, math	1500	x10294
1609E	William The Oblivious bitmasks, data structures, dp, matrices	2400	x2130
1598F	RBS binary search, bitmasks, brute force, data structures, dp	2400	x1442
1592C	Bakry and Partitioning bitmasks, constructive algorithms, dfs and similar, dp, graphs, trees	1700	x8059
1584F	Strange LCS bitmasks, dp, graphs, greedy, strings	2600	x980
1582F1	Korney Korneevich and XOR (easy version) bitmasks, dp, greedy	1800	x5650
1571E	Fix the String *special problem, bitmasks, dp, greedy	1700	x340
1567C	Carrying Conundrum bitmasks, combinatorics, dp, math	1600	x12214
1566C	MAX-MEX Cut bitmasks, constructive algorithms, dp, greedy	1000	x17630
1566B	MIN-MEX Cut bitmasks, constructive algorithms, dp, greedy	800	x19679
1560F2	Nearest Beautiful Number (hard version) bitmasks, brute force, constructive algorithms, dfs and similar, dp, greedy	2100	x4414
1557C	Moamen and XOR bitmasks, combinatorics, dp, math, matrices	1700	x8645
1556F	Sports Betting bitmasks, combinatorics, dp, graphs, math, probabilities	2500	x1254
1553C	Penalty bitmasks, brute force, dp, greedy	1200	x17970
1552D	Array Differentiation bitmasks, brute force, constructive algorithms, dfs and similar, dp, graphs, math	1800	x7063
1550E	Stringforces binary search, bitmasks, brute force, dp, strings, two pointers	2500	x1541
1533H	Submatrices *special problem, bitmasks, data structures, dp		x84
1530F	Bingo bitmasks, combinatorics, dp, math, probabilities	2600	x801
1523F	Favorite Game bitmasks, dp	3300	x431

←