Problemset - Codeforces

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Codeforces Round (Div. 2)
5 days

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Problems

#	Name
1719B	Mathematical Circus constructive algorithms, math	800	x19173
1719A	Chip Game games, math	800	x26852
1718F	Burenka, an Array and Queries data structures, math, number theory	3300	x218
1718E	Impressionism constructive algorithms, graphs, implementation, math	3500	x180
1718D	Permutation for Burenka data structures, graph matchings, greedy, math, trees	3300	x420
1718C	Tonya and Burenka-179 data structures, greedy, math, number theory	2400	x1863
1718B	Fibonacci Strings greedy, implementation, math, number theory	2000	x3481
1718A2	Burenka and Traditions (hard version) data structures, dp, greedy	1900	x5927
1718A1	Burenka and Traditions (easy version) dp, greedy	1800	x6428
1717F	Madoka and The First Session constructive algorithms, flows, graph matchings, graphs, implementation	2500	x640
1717E	Madoka and The Best University math, number theory	2200	x3420
1717D	Madoka and The Corruption Scheme combinatorics, constructive algorithms, greedy, math	1900	x4880
1717C	Madoka and Formal Statement greedy	1300	x15931
1717B	Madoka and Underground Competitions constructive algorithms, implementation	1100	x15649
1717A	Madoka and Strange Thoughts math, number theory	800	x21003
1716F	Bags with Balls combinatorics, dp, math, number theory	2500	x1368
1716E	Swap and Maximum Block bitmasks, data structures, dfs and similar, divide and conquer, dp	2500	x1321
1716D	Chip Move brute force, dp, math	2000	x6152
1716C	Robot in a Hallway data structures, dp, greedy, implementation, ternary search	2000	x4600
1716B	Permutation Chain constructive algorithms, math	800	x21963
1716A	2-3 Moves greedy, math	800	x35975
1715F	Crop Squares constructive algorithms, geometry, interactive, math	2700	x591
1715E	Long Way Home data structures, divide and conquer, dp, geometry, graphs, greedy, shortest paths	2400	x2146
1715D	2+ doors 2-sat, bitmasks, graphs, greedy	1900	x6122
1715C	Monoblock combinatorics, data structures, implementation, math	1700	x10421
1715B	Beautiful Array constructive algorithms, greedy, math	1000	x34009
1715A	Crossmarket constructive algorithms, greedy, math	800	x24388
1714G	Path Prefixes binary search, data structures, dfs and similar, trees	1700	x9727
1714F	Build a Tree and That Is It constructive algorithms, implementation, trees	1900	x3683
1714E	Add Modulo 10 brute force, math, number theory	1400	x23746
1714D	Color with Occurrences brute force, data structures, dp, greedy, strings	1600	x10343
1714C	Minimum Varied Number greedy	800	x33463
1714B	Remove Prefix data structures, greedy, implementation	800	x33883
1714A	Everyone Loves to Sleep implementation, math	900	x32982
1713F	Lost Array bitmasks, combinatorics, constructive algorithms, dp, math	2900	x689
1713E	Cross Swapping 2-sat, data structures, dsu, greedy, matrices	2400	x1981
1713D	Tournament Countdown constructive algorithms, greedy, interactive, number theory, probabilities	1800	x6250
1713C	Build Permutation constructive algorithms, dp, math	1200	x18910
1713B	Optimal Reduction constructive algorithms, sortings	1000	x22731
1713A	Traveling Salesman Problem geometry, greedy, implementation	800	x22845
1712F	Triameter binary search, data structures, dfs and similar, trees	3200	x443
1712E2	LCM Sum (hard version) brute force, data structures, math, number theory, two pointers	2500	x1618
1712E1	LCM Sum (easy version) binary search, brute force, combinatorics, math, number theory, two pointers	2300	x2466
1712D	Empty Graph binary search, constructive algorithms, data structures, greedy, shortest paths	2000	x5124
1712C	Sort Zero greedy, sortings	1100	x21287
1712B	Woeful Permutation constructive algorithms, greedy, number theory	800	x22406
1712A	Wonderful Permutation greedy, implementation	800	x25098
1711B	Party brute force, graphs	1300	x14398
1711A	Perfect Permutation constructive algorithms	800	x26522
1710E	Two Arrays binary search, games, graph matchings	2400	x583
1710D	Recover the Tree constructive algorithms, trees	3400	x560
1710C	XOR Triangle bitmasks, brute force, constructive algorithms, dp, greedy, math	2500	x1631
1710B	Rain binary search, brute force, data structures, geometry, greedy, implementation, math	2100	x2800
1710A	Color the Picture constructive algorithms, greedy, math	1500	x11928
1709F	Multiset of Strings bitmasks, brute force, dp, fft, flows, graphs, math, meet-in-the-middle, trees	2500	x683
1709E	XOR Tree bitmasks, data structures, dfs and similar, dsu, greedy, trees	2400	x3980
1709D	Rorororobot binary search, data structures, greedy, math	1700	x10274
1709C	Recover an RBS constructive algorithms, greedy, implementation, strings	1800	x10321
1709B	Also Try Minecraft data structures, dp, implementation	900	x25945
1709A	Three Doors brute force, greedy, implementation, math	800	x31632
1708B	Difference of GCDs constructive algorithms, math	1100	x28682
1708A	Difference Operations greedy, math	800	x22593
1707F	Bugaboo bitmasks, constructive algorithms, dp, number theory	3500	x175
1707E	Replace binary search, data structures	3500	x936
1707D	Partial Virtual Trees combinatorics, dfs and similar, dp, math, trees	3000	x894
1707C	DFS Trees dfs and similar, dsu, graphs, greedy, sortings, trees	2400	x1921
1707B	Difference Array brute force, data structures, implementation, sortings	1900	x6424
1707A	Doremy's IQ binary search, constructive algorithms, greedy, implementation	1600	x15473
1706E	Qpwoeirut and Vertices binary search, data structures, dfs and similar, divide and conquer, dsu, greedy, trees	2300	x3764
1706D2	Chopping Carrots (Hard Version) brute force, constructive algorithms, data structures, dp, greedy, math, number theory, two pointers	2400	x1942
1706D1	Chopping Carrots (Easy Version) binary search, brute force, constructive algorithms, greedy, number theory	1700	x7729
1706C	Qpwoeirut And The City dp, flows, greedy, implementation	1400	x16162
1706B	Making Towers dp, greedy, math	1100	x17501
1706A	Another String Minimization Problem 2-sat, constructive algorithms, greedy, string suffix structures, strings	800	x24268
1705F	Mark and the Online Exam bitmasks, constructive algorithms, interactive, probabilities	2900	x696
1705E	Mark and Professor Koro binary search, bitmasks, brute force, combinatorics, data structures, greedy	2300	x2465
1705D	Mark and Lightbulbs combinatorics, constructive algorithms, greedy, math, sortings	1800	x7179
1705C	Mark and His Unfinished Essay brute force, implementation	1400	x14615
1705B	Mark the Dust Sweeper constructive algorithms, greedy, implementation	900	x25509
1705A	Mark the Photographer greedy, sortings	800	x26612
1704H2	Game of AI (hard version) combinatorics, fft, math	3500	x112
1704H1	Game of AI (easy version) combinatorics, constructive algorithms, dp, fft, math	3200	x239
1704G	Mio and Lucky Array constructive algorithms, fft, math, strings	3500	x134
1704F	Colouring Game constructive algorithms, dp, games	2600	x1309
1704E	Count Seconds brute force, constructive algorithms, dp, graphs, implementation, math	2200	x2687
1704D	Magical Array constructive algorithms, hashing, implementation, math	1900	x5385
1704C	Virus greedy, implementation, sortings	1200	x25121
1704B	Luke is a Foodie brute force, greedy, implementation	1000	x30328
1704A	Two 0-1 Sequences constructive algorithms, greedy	800	x16666
1703G	Good Key, Bad Key bitmasks, brute force, dp, greedy, math	1600	x12788
1703F	Yet Another Problem About Pairs Satisfying an Inequality binary search, data structures, dp, greedy, sortings	1300	x30329
1703E	Mirror Grid implementation	1200	x27888
1703D	Double Strings brute force, data structures, strings	1100	x29261
1703C	Cypher brute force, implementation, strings	800	x40958
1703B	ICPC Balloons data structures, implementation	800	x66532
1703A	YES or YES? brute force, implementation, strings	800	x97945
1702G2	Passable Paths (hard version) data structures, dfs and similar, trees	2000	x5837
1702G1	Passable Paths (easy version) dfs and similar, trees	1900	x6393
1702F	Equate Multisets constructive algorithms, data structures, greedy, math, number theory	1700	x9503
1702E	Split Into Two Sets dfs and similar, dsu, graphs	1600	x18039

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