Problemset - Codeforces

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Codeforces Round (Div. 3)
4 days

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Difficulty: —

constructive algorithms

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Problems

#	Name
1714F	Build a Tree and That Is It constructive algorithms, implementation, trees	1900	x3139
1713F	Lost Array bitmasks, combinatorics, constructive algorithms, dp, math	2900	x520
1713D	Tournament Countdown constructive algorithms, greedy, interactive, number theory, probabilities	1800	x5548
1713C	Build Permutation constructive algorithms, dp, math	1200	x17009
1713B	Optimal Reduction constructive algorithms, sortings	1000	x20924
1712D	Empty Graph binary search, constructive algorithms, data structures, greedy, shortest paths	2000	x4368
1712B	Woeful Permutation constructive algorithms, greedy, number theory	800	x21391
1711A	Perfect Permutation constructive algorithms	800	x24930
1710D	Recover the Tree constructive algorithms, trees	3400	x413
1710C	XOR Triangle bitmasks, brute force, constructive algorithms, dp, greedy, math	2500	x1298
1710A	Color the Picture constructive algorithms, greedy, math	1500	x10732
1709C	Recover an RBS constructive algorithms, greedy, implementation, strings	1800	x8646
1708B	Difference of GCDs constructive algorithms, math	1100	x19996
1707F	Bugaboo bitmasks, constructive algorithms, dp, number theory	3500	x146
1707A	Doremy's IQ binary search, constructive algorithms, greedy, implementation	1600	x13165
1706D2	Chopping Carrots (Hard Version) brute force, constructive algorithms, data structures, dp, greedy, math, number theory, two pointers	2400	x1664
1706D1	Chopping Carrots (Easy Version) binary search, brute force, constructive algorithms, greedy, number theory	1700	x6767
1706A	Another String Minimization Problem 2-sat, constructive algorithms, greedy, string suffix structures, strings	800	x22679
1705F	Mark and the Online Exam bitmasks, constructive algorithms, interactive, probabilities	2900	x588
1705D	Mark and Lightbulbs combinatorics, constructive algorithms, greedy, math, sortings	1800	x6201
1705B	Mark the Dust Sweeper constructive algorithms, greedy, implementation	900	x22414
1704H1	Game of AI (easy version) combinatorics, constructive algorithms, dp, fft, math	3200	x176
1704G	Mio and Lucky Array constructive algorithms, fft, math, strings	3500	x99
1704F	Colouring Game constructive algorithms, dp, games	2600	x948
1704E	Count Seconds brute force, constructive algorithms, dp, graphs, implementation, math	2200	x2250
1704D	Magical Array constructive algorithms, hashing, implementation, math	1900	x4925
1704A	Two 0-1 Sequences constructive algorithms, greedy	800	x15876
1702F	Equate Multisets constructive algorithms, data structures, greedy, math, number theory	1700	x8130
1702A	Round Down the Price constructive algorithms	800	x33984
1700F	Puzzle constructive algorithms, dp, greedy	2600	x866
1700E	Serega the Pirate brute force, constructive algorithms	2600	x835
1700C	Helping the Nature constructive algorithms, data structures, greedy	1700	x10643
1700B	Palindromic Numbers constructive algorithms, implementation, math	1100	x18450
1700A	Optimal Path constructive algorithms, greedy, math	800	x22681
1699C	The Third Problem combinatorics, constructive algorithms, math	1700	x9537
1699B	Almost Ternary Matrix bitmasks, constructive algorithms, matrices	900	x19392
1699A	The Third Three Number Problem constructive algorithms, math	800	x23772
1698F	Equal Reversal constructive algorithms, graphs, implementation, math	2800	x598
1698D	Fixed Point Guessing binary search, constructive algorithms, interactive	1600	x8892
1698B	Rising Sand constructive algorithms, greedy, implementation	800	x20745
1697F	Too Many Constraints 2-sat, constructive algorithms, graphs, implementation	2800	x540
1697E	Coloring brute force, combinatorics, constructive algorithms, dp, geometry, graphs, greedy, implementation, math	2400	x1152
1697D	Guess The String binary search, constructive algorithms, interactive	1900	x4333
1697C	awoo's Favorite Problem binary search, constructive algorithms, data structures, greedy, implementation, strings, two pointers	1400	x14099
1696F	Tree Recovery brute force, constructive algorithms, dfs and similar, dsu, graphs, trees	2600	x857
1696D	Permutation Graph binary search, constructive algorithms, data structures, divide and conquer, greedy, shortest paths	1900	x5264
1696C	Fishingprince Plays With Array constructive algorithms, greedy, implementation, math	1400	x11406
1695E	Ambiguous Dominoes constructive algorithms, dfs and similar, graphs	2700	x436
1695D2	Tree Queries (Hard Version) constructive algorithms, dfs and similar, dp, greedy, trees	2300	x1945
1695D1	Tree Queries (Easy Version) brute force, constructive algorithms, dfs and similar, dp, greedy, trees	2200	x2122
1694B	Paranoid String constructive algorithms, greedy	1200	x18760
1691D	Max GEQ Sum binary search, constructive algorithms, data structures, divide and conquer, implementation, two pointers	1800	x5619
1691C	Sum of Substrings brute force, constructive algorithms, greedy, math, strings	1400	x15297
1691B	Shoe Shuffling constructive algorithms, greedy, implementation, two pointers	1000	x21990
1690A	Print a Pedestal (Codeforces logo?) constructive algorithms, greedy	800	x32889
1689E	ANDfinity bitmasks, brute force, constructive algorithms, dfs and similar, dsu, graphs	2500	x1173
1688C	Manipulating History constructive algorithms, greedy, strings	1700	x8016
1688B	Patchouli's Magical Talisman bitmasks, constructive algorithms, greedy, sortings	800	x18013
1687E	Become Big For Me combinatorics, constructive algorithms, greedy, math, number theory	3500	x222
1687B	Railway System constructive algorithms, graphs, greedy, interactive, sortings	1700	x3531
1685D2	Permutation Weight (Hard Version) constructive algorithms, greedy	3500	x105
1685D1	Permutation Weight (Easy Version) constructive algorithms, dfs and similar, dsu	2800	x433
1685C	Bring Balance brute force, constructive algorithms, greedy	2600	x952
1685A	Circular Local MiniMax constructive algorithms, greedy, sortings	1100	x16721
1684H	Hard Cut constructive algorithms, dfs and similar, divide and conquer, math	3400	x236
1684G	Euclid Guess constructive algorithms, flows, graph matchings, math, number theory	2800	x585
1684E	MEX vs DIFF binary search, brute force, constructive algorithms, data structures, greedy, two pointers	2100	x3087
1684D	Traps constructive algorithms, greedy, sortings	1700	x9453
1684C	Column Swapping brute force, constructive algorithms, greedy, implementation, sortings	1400	x12149
1684B	Z mod X = C constructive algorithms, math	800	x20800
1684A	Digit Minimization constructive algorithms, games, math, strings	800	x23654
1682E	Unordered Swaps constructive algorithms, dfs and similar, graphs, greedy, math, sortings, trees	2700	x573
1682D	Circular Spanning Tree constructive algorithms, implementation, trees	2000	x3228
1682C	LIS or Reverse LIS? constructive algorithms, greedy, implementation, math	1400	x14403
1682B	AND Sorting bitmasks, constructive algorithms, sortings	1100	x17807
1677C	Tokitsukaze and Two Colorful Tapes constructive algorithms, dfs and similar, graphs, greedy	1900	x3486
1674E	Breaking the Wall binary search, brute force, constructive algorithms, greedy, math	2000	x6245
1674D	A-B-C Sort constructive algorithms, implementation, sortings	1200	x15975
1674A	Number Transformation constructive algorithms, math	800	x25932
1673F	Anti-Theft Road Planning bitmasks, constructive algorithms, divide and conquer, greedy, interactive, math	2400	x785
1672H	Zigu Zagu constructive algorithms, data structures, greedy	2700	x922
1672G	Cross Xor constructive algorithms, graphs, math, matrices	3200	x319
1672F2	Checker for Array Shuffling constructive algorithms, dfs and similar, graphs	2800	x784
1672F1	Array Shuffling constructive algorithms, graphs, greedy	2000	x3020
1672E	notepad.exe binary search, constructive algorithms, greedy, interactive	2200	x2110
1672D	Cyclic Rotation constructive algorithms, greedy, implementation, two pointers	1700	x6120
1672C	Unequal Array constructive algorithms, greedy, implementation	1100	x13066
1672B	I love AAAB constructive algorithms, implementation	800	x15687
1671D	Insert a Progression brute force, constructive algorithms, greedy	1600	x7460
1670E	Hemose on the Tree bitmasks, constructive algorithms, dfs and similar, trees	2200	x1704
1667D	Edge Elimination constructive algorithms, dfs and similar, dp, trees	2900	x650
1667C	Half Queen Cover constructive algorithms, math	2400	x1541
1666J	Job Lookup constructive algorithms, dp, shortest paths, trees	2100	x1302
1666I	Interactive Treasure Hunt brute force, constructive algorithms, geometry, interactive, math	2200	x1395
1666E	Even Split binary search, constructive algorithms, greedy, math	2500	x690
1666C	Connect the Points brute force, constructive algorithms, geometry	1800	x3117
1665D	GCD Guess bitmasks, chinese remainder theorem, constructive algorithms, games, interactive, math, number theory	2000	x3776
1665B	Array Cloning Technique constructive algorithms, greedy, sortings	900	x19339
1665A	GCD vs LCM constructive algorithms, math	800	x23202
1663H	Cross-Language Program *special problem, constructive algorithms		x1273