Problemset - Codeforces

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Rayan Programming Contest 2024 - Selection (Codeforces Round 989, Div. 1 + Div. 2)
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Problems

#	Name
1718F	Burenka, an Array and Queries data structures, math, number theory	3300	x163
1718E	Impressionism constructive algorithms, graphs, implementation, math	3500	x120
1718D	Permutation for Burenka data structures, graph matchings, greedy, math, trees	3300	x315
1718C	Tonya and Burenka-179 data structures, greedy, math, number theory	2400	x1639
1718B	Fibonacci Strings greedy, implementation, math, number theory	2000	x3050
1718A2	Burenka and Traditions (hard version) data structures, dp, greedy	1900	x5334
1718A1	Burenka and Traditions (easy version) dp, greedy	1800	x5854
1717F	Madoka and The First Session constructive algorithms, flows, graph matchings, graphs, implementation	2500	x532
1717E	Madoka and The Best University math, number theory	2200	x2766
1717D	Madoka and The Corruption Scheme combinatorics, constructive algorithms, greedy, math	1900	x4438
1716F	Bags with Balls combinatorics, dp, math, number theory	2500	x1084
1716E	Swap and Maximum Block bitmasks, data structures, dfs and similar, divide and conquer, dp	2500	x1105
1716D	Chip Move brute force, dp, math	2000	x5329
1716C	Robot in a Hallway data structures, dp, greedy, implementation, ternary search	2000	x4239
1715F	Crop Squares constructive algorithms, geometry, interactive, math	2700	x531
1715E	Long Way Home data structures, divide and conquer, dp, geometry, graphs, greedy, shortest paths	2400	x1753
1715D	2+ doors 2-sat, bitmasks, graphs, greedy	1900	x5208
1715C	Monoblock combinatorics, data structures, implementation, math	1700	x8713
1714G	Path Prefixes binary search, data structures, dfs and similar, trees	1700	x7714
1714F	Build a Tree and That Is It constructive algorithms, implementation, trees	1900	x3281
1714D	Color with Occurrences brute force, data structures, dp, greedy, strings	1600	x9187
1713F	Lost Array bitmasks, combinatorics, constructive algorithms, dp, math	2900	x546
1713E	Cross Swapping 2-sat, data structures, dsu, greedy, matrices	2400	x1733
1713D	Tournament Countdown constructive algorithms, greedy, interactive, number theory, probabilities	1800	x5726
1712F	Triameter binary search, data structures, dfs and similar, trees	3200	x337
1712E2	LCM Sum (hard version) brute force, data structures, math, number theory, two pointers	2500	x1372
1712E1	LCM Sum (easy version) binary search, brute force, combinatorics, math, number theory, two pointers	2300	x2202
1712D	Empty Graph binary search, constructive algorithms, data structures, greedy, shortest paths	2000	x4577
1710E	Two Arrays binary search, games, graph matchings	2400	x507
1710D	Recover the Tree constructive algorithms, trees	3400	x423
1710C	XOR Triangle bitmasks, brute force, constructive algorithms, dp, greedy, math	2500	x1395
1710B	Rain binary search, brute force, data structures, geometry, greedy, implementation, math	2100	x2501
1709F	Multiset of Strings bitmasks, brute force, dp, fft, flows, graphs, math, meet-in-the-middle, trees	2500	x559
1709E	XOR Tree bitmasks, data structures, dfs and similar, dsu, greedy, trees	2400	x2799
1709D	Rorororobot binary search, data structures, greedy, math	1700	x8498
1709C	Recover an RBS constructive algorithms, greedy, implementation, strings	1800	x8922
1707F	Bugaboo bitmasks, constructive algorithms, dp, number theory	3500	x154
1707E	Replace binary search, data structures	3500	x728
1707D	Partial Virtual Trees combinatorics, dfs and similar, dp, math, trees	3000	x662
1707C	DFS Trees dfs and similar, dsu, graphs, greedy, sortings, trees	2400	x1567
1707B	Difference Array brute force, data structures, implementation, sortings	1900	x5810
1707A	Doremy's IQ binary search, constructive algorithms, greedy, implementation	1600	x13748
1706E	Qpwoeirut and Vertices binary search, data structures, dfs and similar, divide and conquer, dsu, greedy, trees	2300	x2784
1706D2	Chopping Carrots (Hard Version) brute force, constructive algorithms, data structures, dp, greedy, math, number theory, two pointers	2400	x1726
1706D1	Chopping Carrots (Easy Version) binary search, brute force, constructive algorithms, greedy, number theory	1700	x7042
1705F	Mark and the Online Exam bitmasks, constructive algorithms, interactive, probabilities	2900	x620
1705E	Mark and Professor Koro binary search, bitmasks, brute force, combinatorics, data structures, greedy	2300	x2111
1705D	Mark and Lightbulbs combinatorics, constructive algorithms, greedy, math, sortings	1800	x6384
1704H2	Game of AI (hard version) combinatorics, fft, math	3500	x93
1704H1	Game of AI (easy version) combinatorics, constructive algorithms, dp, fft, math	3200	x186
1704G	Mio and Lucky Array constructive algorithms, fft, math, strings	3500	x115
1704F	Colouring Game constructive algorithms, dp, games	2600	x1064
1704E	Count Seconds brute force, constructive algorithms, dp, graphs, implementation, math	2200	x2385
1704D	Magical Array constructive algorithms, hashing, implementation, math	1900	x5073
1703G	Good Key, Bad Key bitmasks, brute force, dp, greedy, math	1600	x10860
1702G2	Passable Paths (hard version) data structures, dfs and similar, trees	2000	x4733
1702G1	Passable Paths (easy version) dfs and similar, trees	1900	x5513
1702F	Equate Multisets constructive algorithms, data structures, greedy, math, number theory	1700	x8472
1702E	Split Into Two Sets dfs and similar, dsu, graphs	1600	x13550
1701F	Points combinatorics, data structures, implementation, math, matrices	2500	x953
1701E	Text Editor brute force, dp, greedy, strings	2500	x1156
1701D	Permutation Restoration binary search, data structures, greedy, math, sortings, two pointers	1900	x5730
1700F	Puzzle constructive algorithms, dp, greedy	2600	x948
1700E	Serega the Pirate brute force, constructive algorithms	2600	x878
1700D	River Locks binary search, dp, greedy, math	1900	x6165
1700C	Helping the Nature constructive algorithms, data structures, greedy	1700	x11015
1699E	Three Days Grace data structures, dp, greedy, math, number theory, two pointers	2600	x1215
1699D	Almost Triple Deletions data structures, dp, greedy	2300	x3173
1699C	The Third Problem combinatorics, constructive algorithms, math	1700	x9844
1698G	Long Binary String bitmasks, math, matrices, meet-in-the-middle, number theory	2900	x319
1698F	Equal Reversal constructive algorithms, graphs, implementation, math	2800	x645
1698E	PermutationForces II brute force, combinatorics, greedy, sortings, trees, two pointers	2300	x1659
1698D	Fixed Point Guessing binary search, constructive algorithms, interactive	1600	x9465
1697F	Too Many Constraints 2-sat, constructive algorithms, graphs, implementation	2800	x573
1697E	Coloring brute force, combinatorics, constructive algorithms, dp, geometry, graphs, greedy, implementation, math	2400	x1243
1697D	Guess The String binary search, constructive algorithms, interactive	1900	x4495
1696H	Maximum Product? brute force, combinatorics, dp, greedy, implementation, math, two pointers	3500	x164
1696G	Fishingprince Plays With Array Again brute force, data structures, geometry, math	3300	x278
1696F	Tree Recovery brute force, constructive algorithms, dfs and similar, dsu, graphs, trees	2600	x891
1696E	Placing Jinas combinatorics, math	2000	x4120
1696D	Permutation Graph binary search, constructive algorithms, data structures, divide and conquer, greedy, shortest paths	1900	x5504
1695E	Ambiguous Dominoes constructive algorithms, dfs and similar, graphs	2700	x453
1695D2	Tree Queries (Hard Version) constructive algorithms, dfs and similar, dp, greedy, trees	2300	x2033
1695D1	Tree Queries (Easy Version) brute force, constructive algorithms, dfs and similar, dp, greedy, trees	2200	x2200
1695C	Zero Path brute force, data structures, dp, graphs, greedy, shortest paths	1700	x11045
1693F	I Might Be Wrong binary search, greedy, two pointers	3400	x420
1693E	Outermost Maximums data structures, greedy	3400	x431
1693D	Decinc Dividing brute force, data structures, divide and conquer, dp, greedy	2800	x855
1693C	Keshi in Search of AmShZ graphs, greedy, shortest paths	2300	x2657
1693B	Fake Plastic Trees dfs and similar, dp, greedy, trees	1700	x8583
1692H	Gambling data structures, dp, greedy, math	1700	x7558
1691F	K-Set Tree combinatorics, dfs and similar, dp, math, trees	2500	x998
1691E	Number of Groups data structures, dfs and similar, dsu, graphs, greedy, sortings	2300	x1858
1691D	Max GEQ Sum binary search, constructive algorithms, data structures, divide and conquer, implementation, two pointers	1800	x5878
1690G	Count the Trains binary search, data structures, greedy, sortings	2000	x3437
1690F	Shifting String graphs, math, number theory, strings	1700	x7232
1689E	ANDfinity bitmasks, brute force, constructive algorithms, dfs and similar, dsu, graphs	2500	x1232
1689D	Lena and Matrix data structures, dp, geometry, shortest paths	1900	x4253
1689C	Infected Tree dfs and similar, dp, trees	1600	x11400
1688C	Manipulating History constructive algorithms, greedy, strings	1700	x8201