Problemset - Codeforces

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Codeforces Round (Div. 1 + Div. 2)
13 days

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Problems

#	Name
1721B	Deadly Laser implementation	1000	x24124
1721A	Image greedy, implementation	800	x28489
1720E	Misha and Paintings constructive algorithms, data structures, greedy, implementation, math	2700	x1089
1720D2	Xor-Subsequence (hard version) bitmasks, data structures, dp, strings, trees	2400	x2313
1720D1	Xor-Subsequence (easy version) bitmasks, brute force, dp, strings, trees, two pointers	1800	x6832
1720C	Corners greedy, implementation	1200	x18442
1720B	Interesting Sum brute force, data structures, greedy, math, sortings	800	x22606
1720A	Burenka Plays with Fractions math, number theory	900	x24695
1719C	Fighting Tournament binary search, data structures, implementation, two pointers	1400	x14516
1719B	Mathematical Circus constructive algorithms, math	800	x19249
1719A	Chip Game games, math	800	x26982
1718F	Burenka, an Array and Queries data structures, math, number theory	3300	x275
1718E	Impressionism constructive algorithms, graphs, implementation, math	3500	x255
1718D	Permutation for Burenka data structures, graph matchings, greedy, math, trees	3300	x457
1718C	Tonya and Burenka-179 data structures, greedy, math, number theory	2400	x1920
1718B	Fibonacci Strings greedy, implementation, math, number theory	2000	x3591
1718A2	Burenka and Traditions (hard version) data structures, dp, greedy	1900	x6021
1718A1	Burenka and Traditions (easy version) dp, greedy	1800	x6519
1717F	Madoka and The First Session constructive algorithms, flows, graph matchings, graphs, implementation	2500	x799
1717E	Madoka and The Best University math, number theory	2200	x3643
1717D	Madoka and The Corruption Scheme combinatorics, constructive algorithms, greedy, math	1900	x4959
1717C	Madoka and Formal Statement greedy	1300	x16078
1717B	Madoka and Underground Competitions constructive algorithms, implementation	1100	x15755
1717A	Madoka and Strange Thoughts math, number theory	800	x21275
1716F	Bags with Balls combinatorics, dp, math, number theory	2500	x1487
1716E	Swap and Maximum Block bitmasks, data structures, dfs and similar, divide and conquer, dp	2500	x1395
1716D	Chip Move brute force, dp, math	2000	x6332
1716C	Robot in a Hallway data structures, dp, greedy, implementation, ternary search	2000	x4691
1716B	Permutation Chain constructive algorithms, math	800	x22143
1716A	2-3 Moves greedy, math	800	x36578
1715F	Crop Squares constructive algorithms, geometry, interactive, math	2700	x611
1715E	Long Way Home data structures, divide and conquer, dp, geometry, graphs, greedy, shortest paths	2400	x2460
1715D	2+ doors 2-sat, bitmasks, graphs, greedy	1900	x6331
1715C	Monoblock combinatorics, data structures, implementation, math	1700	x10805
1715B	Beautiful Array constructive algorithms, greedy, math	1000	x37031
1715A	Crossmarket constructive algorithms, greedy, math	800	x24529
1714G	Path Prefixes binary search, data structures, dfs and similar, trees	1700	x9945
1714F	Build a Tree and That Is It constructive algorithms, implementation, trees	1900	x3783
1714E	Add Modulo 10 brute force, math, number theory	1400	x25421
1714D	Color with Occurrences brute force, data structures, dp, greedy, strings	1600	x10560
1714C	Minimum Varied Number greedy	800	x33866
1714B	Remove Prefix data structures, greedy, implementation	800	x34648
1714A	Everyone Loves to Sleep implementation, math	900	x33729
1713F	Lost Array bitmasks, combinatorics, constructive algorithms, dp, math	2900	x792
1713E	Cross Swapping 2-sat, data structures, dsu, greedy, matrices	2400	x2066
1713D	Tournament Countdown constructive algorithms, greedy, interactive, number theory, probabilities	1800	x6339
1713C	Build Permutation constructive algorithms, dp, math	1200	x19090
1713B	Optimal Reduction constructive algorithms, sortings	1000	x22940
1713A	Traveling Salesman Problem geometry, greedy, implementation	800	x22930
1712F	Triameter binary search, data structures, dfs and similar, trees	3200	x530
1712E2	LCM Sum (hard version) brute force, data structures, math, number theory, two pointers	2500	x1699
1712E1	LCM Sum (easy version) binary search, brute force, combinatorics, math, number theory, two pointers	2300	x2560
1712D	Empty Graph binary search, constructive algorithms, data structures, greedy, shortest paths	2000	x5226
1712C	Sort Zero greedy, sortings	1100	x21466
1712B	Woeful Permutation constructive algorithms, greedy, number theory	800	x22507
1712A	Wonderful Permutation greedy, implementation	800	x25256
1711B	Party brute force, graphs	1300	x14717
1711A	Perfect Permutation constructive algorithms	800	x26725
1710E	Two Arrays binary search, games, graph matchings	2400	x592
1710D	Recover the Tree constructive algorithms, trees	3400	x569
1710C	XOR Triangle bitmasks, brute force, constructive algorithms, dp, greedy, math	2500	x1693
1710B	Rain binary search, brute force, data structures, geometry, greedy, implementation, math	2100	x2855
1710A	Color the Picture constructive algorithms, greedy, math	1500	x12024
1709F	Multiset of Strings bitmasks, brute force, dp, fft, flows, graphs, math, meet-in-the-middle, trees	2500	x733
1709E	XOR Tree bitmasks, data structures, dfs and similar, dsu, greedy, trees	2400	x4398
1709D	Rorororobot binary search, data structures, greedy, math	1700	x10809
1709C	Recover an RBS constructive algorithms, greedy, implementation, strings	1800	x10753
1709B	Also Try Minecraft data structures, dp, implementation	900	x26600
1709A	Three Doors brute force, greedy, implementation, math	800	x32053
1708B	Difference of GCDs constructive algorithms, math	1100	x30706
1708A	Difference Operations greedy, math	800	x22734
1707F	Bugaboo bitmasks, constructive algorithms, dp, number theory	3500	x187
1707E	Replace binary search, data structures	3500	x954
1707D	Partial Virtual Trees combinatorics, dfs and similar, dp, math, trees	3000	x1038
1707C	DFS Trees dfs and similar, dsu, graphs, greedy, sortings, trees	2400	x1989
1707B	Difference Array brute force, data structures, implementation, sortings	1900	x6510
1707A	Doremy's IQ binary search, constructive algorithms, greedy, implementation	1600	x15788
1706E	Qpwoeirut and Vertices binary search, data structures, dfs and similar, divide and conquer, dsu, greedy, trees	2300	x4158
1706D2	Chopping Carrots (Hard Version) brute force, constructive algorithms, data structures, dp, greedy, math, number theory, two pointers	2400	x1988
1706D1	Chopping Carrots (Easy Version) binary search, brute force, constructive algorithms, greedy, number theory	1700	x7834
1706C	Qpwoeirut And The City dp, flows, greedy, implementation	1400	x16343
1706B	Making Towers dp, greedy, math	1100	x17659
1706A	Another String Minimization Problem 2-sat, constructive algorithms, greedy, string suffix structures, strings	800	x24395
1705F	Mark and the Online Exam bitmasks, constructive algorithms, interactive, probabilities	2900	x731
1705E	Mark and Professor Koro binary search, bitmasks, brute force, combinatorics, data structures, greedy	2300	x2562
1705D	Mark and Lightbulbs combinatorics, constructive algorithms, greedy, math, sortings	1800	x7272
1705C	Mark and His Unfinished Essay brute force, implementation	1400	x14740
1705B	Mark the Dust Sweeper constructive algorithms, greedy, implementation	900	x25906
1705A	Mark the Photographer greedy, sortings	800	x26782
1704H2	Game of AI (hard version) combinatorics, fft, math	3500	x120
1704H1	Game of AI (easy version) combinatorics, constructive algorithms, dp, fft, math	3200	x401
1704G	Mio and Lucky Array constructive algorithms, fft, math, strings	3500	x186
1704F	Colouring Game constructive algorithms, dp, games	2600	x1389
1704E	Count Seconds brute force, constructive algorithms, dp, graphs, implementation, math	2200	x2764
1704D	Magical Array constructive algorithms, hashing, implementation, math	1900	x5433
1704C	Virus greedy, implementation, sortings	1200	x27426
1704B	Luke is a Foodie brute force, greedy, implementation	1000	x33378
1704A	Two 0-1 Sequences constructive algorithms, greedy	800	x16770
1703G	Good Key, Bad Key bitmasks, brute force, dp, greedy, math	1600	x13161
1703F	Yet Another Problem About Pairs Satisfying an Inequality binary search, data structures, dp, greedy, sortings	1300	x33033

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