Problemset - Codeforces

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Codeforces Round (Div. 2)
7 days

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Problems

#	Name
1706B	Making Towers dp, greedy, math	1100	x16553
1706A	Another String Minimization Problem 2-sat, constructive algorithms, greedy, string suffix structures, strings	800	x22956
1705F	Mark and the Online Exam bitmasks, constructive algorithms, interactive, probabilities	2900	x607
1705E	Mark and Professor Koro binary search, bitmasks, brute force, combinatorics, data structures, greedy	2300	x2071
1705D	Mark and Lightbulbs combinatorics, constructive algorithms, greedy, math, sortings	1800	x6341
1705C	Mark and His Unfinished Essay brute force, implementation	1400	x13341
1705B	Mark the Dust Sweeper constructive algorithms, greedy, implementation	900	x22985
1705A	Mark the Photographer greedy, sortings	800	x25247
1704H2	Game of AI (hard version) combinatorics, fft, math	3500	x85
1704H1	Game of AI (easy version) combinatorics, constructive algorithms, dp, fft, math	3200	x180
1704G	Mio and Lucky Array constructive algorithms, fft, math, strings	3500	x113
1704F	Colouring Game constructive algorithms, dp, games	2600	x1039
1704E	Count Seconds brute force, constructive algorithms, dp, graphs, implementation, math	2200	x2345
1704D	Magical Array constructive algorithms, hashing, implementation, math	1900	x5024
1704C	Virus greedy, implementation, sortings	1200	x15800
1704B	Luke is a Foodie brute force, greedy, implementation	1000	x18056
1704A	Two 0-1 Sequences constructive algorithms, greedy	800	x16019
1703G	Good Key, Bad Key bitmasks, brute force, dp, greedy, math	1600	x10676
1703F	Yet Another Problem About Pairs Satisfying an Inequality binary search, data structures, dp, greedy, sortings	1300	x20044
1703E	Mirror Grid implementation	1200	x18351
1703D	Double Strings brute force, data structures, strings	1100	x25626
1703C	Cypher brute force, implementation, strings	800	x35550
1703B	ICPC Balloons data structures, implementation	800	x49036
1703A	YES or YES? brute force, implementation, strings	800	x69377
1702G2	Passable Paths (hard version) data structures, dfs and similar, trees	2000	x4652
1702G1	Passable Paths (easy version) dfs and similar, trees	1900	x5440
1702F	Equate Multisets constructive algorithms, data structures, greedy, math, number theory	1700	x8387
1702E	Split Into Two Sets dfs and similar, dsu, graphs	1600	x13310
1702D	Not a Cheap String greedy	1000	x23687
1702C	Train and Queries data structures, greedy	1100	x22237
1702B	Polycarp Writes a String from Memory greedy	800	x27586
1702A	Round Down the Price constructive algorithms	800	x34765
1701F	Points combinatorics, data structures, implementation, math, matrices	2500	x935
1701E	Text Editor brute force, dp, greedy, strings	2500	x1124
1701D	Permutation Restoration binary search, data structures, greedy, math, sortings, two pointers	1900	x5682
1701C	Schedule Management binary search, greedy, implementation, two pointers	1400	x17027
1701B	Permutation greedy	800	x20195
1701A	Grass Field implementation	800	x26268
1700F	Puzzle constructive algorithms, dp, greedy	2600	x935
1700E	Serega the Pirate brute force, constructive algorithms	2600	x853
1700D	River Locks binary search, dp, greedy, math	1900	x6100
1700C	Helping the Nature constructive algorithms, data structures, greedy	1700	x10926
1700B	Palindromic Numbers constructive algorithms, implementation, math	1100	x18727
1700A	Optimal Path constructive algorithms, greedy, math	800	x22871
1699E	Three Days Grace data structures, dp, greedy, math, number theory, two pointers	2600	x1164
1699D	Almost Triple Deletions data structures, dp, greedy	2300	x3144
1699C	The Third Problem combinatorics, constructive algorithms, math	1700	x9766
1699B	Almost Ternary Matrix bitmasks, constructive algorithms, matrices	900	x19743
1699A	The Third Three Number Problem constructive algorithms, math	800	x23998
1698G	Long Binary String bitmasks, math, matrices, meet-in-the-middle, number theory	2900	x315
1698F	Equal Reversal constructive algorithms, graphs, implementation, math	2800	x623
1698E	PermutationForces II brute force, combinatorics, greedy, sortings, trees, two pointers	2300	x1640
1698D	Fixed Point Guessing binary search, constructive algorithms, interactive	1600	x9303
1698C	3SUM Closure brute force, data structures	1300	x18502
1698B	Rising Sand constructive algorithms, greedy, implementation	800	x20908
1698A	XOR Mixup bitmasks, brute force	800	x29034
1697F	Too Many Constraints 2-sat, constructive algorithms, graphs, implementation	2800	x561
1697E	Coloring brute force, combinatorics, constructive algorithms, dp, geometry, graphs, greedy, implementation, math	2400	x1209
1697D	Guess The String binary search, constructive algorithms, interactive	1900	x4442
1697C	awoo's Favorite Problem binary search, constructive algorithms, data structures, greedy, implementation, strings, two pointers	1400	x14357
1697B	Promo greedy, sortings	900	x26584
1697A	Parkway Walk greedy, implementation	800	x25729
1696H	Maximum Product? brute force, combinatorics, dp, greedy, implementation, math, two pointers	3500	x161
1696G	Fishingprince Plays With Array Again brute force, data structures, geometry, math	3300	x276
1696F	Tree Recovery brute force, constructive algorithms, dfs and similar, dsu, graphs, trees	2600	x884
1696E	Placing Jinas combinatorics, math	2000	x4045
1696D	Permutation Graph binary search, constructive algorithms, data structures, divide and conquer, greedy, shortest paths	1900	x5457
1696C	Fishingprince Plays With Array constructive algorithms, greedy, implementation, math	1400	x11630
1696B	NIT Destroys the Universe greedy	900	x21341
1696A	NIT orz! bitmasks, greedy	800	x18772
1695E	Ambiguous Dominoes constructive algorithms, dfs and similar, graphs	2700	x448
1695D2	Tree Queries (Hard Version) constructive algorithms, dfs and similar, dp, greedy, trees	2300	x1998
1695D1	Tree Queries (Easy Version) brute force, constructive algorithms, dfs and similar, dp, greedy, trees	2200	x2176
1695C	Zero Path brute force, data structures, dp, graphs, greedy, shortest paths	1700	x10939
1695B	Circle Game games, greedy	1000	x18473
1695A	Subrectangle Guess games	800	x16338
1694B	Paranoid String constructive algorithms, greedy	1200	x19126
1694A	Creep greedy, implementation	800	x22655
1693F	I Might Be Wrong binary search, greedy, two pointers	3400	x409
1693E	Outermost Maximums data structures, greedy	3400	x422
1693D	Decinc Dividing brute force, data structures, divide and conquer, dp, greedy	2800	x839
1693C	Keshi in Search of AmShZ graphs, greedy, shortest paths	2300	x2583
1693B	Fake Plastic Trees dfs and similar, dp, greedy, trees	1700	x8471
1693A	Directional Increase greedy	1300	x16144
1692H	Gambling data structures, dp, greedy, math	1700	x7468
1692G	2^Sort data structures, dp, sortings, two pointers	1400	x17735
1692F	3SUM brute force, math	1300	x22816
1692E	Binary Deque binary search, implementation, two pointers	1200	x21980
1692D	The Clock brute force, implementation	1100	x19416
1692C	Where's the Bishop? implementation	800	x34128
1692B	All Distinct greedy, sortings	800	x34152
1692A	Marathon implementation	800	x65059
1691F	K-Set Tree combinatorics, dfs and similar, dp, math, trees	2500	x972
1691E	Number of Groups data structures, dfs and similar, dsu, graphs, greedy, sortings	2300	x1830
1691D	Max GEQ Sum binary search, constructive algorithms, data structures, divide and conquer, implementation, two pointers	1800	x5814
1691C	Sum of Substrings brute force, constructive algorithms, greedy, math, strings	1400	x15656
1691B	Shoe Shuffling constructive algorithms, greedy, implementation, two pointers	1000	x23084
1691A	Beat The Odds brute force, greedy, math	800	x30521
1690G	Count the Trains binary search, data structures, greedy, sortings	2000	x3388
1690F	Shifting String graphs, math, number theory, strings	1700	x7164