Problemset - Codeforces

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Ethflow Round 1 (Codeforces Round, Div. 1 + Div. 2)
3 days

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Difficulty: —

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Problems

#	Name
2063C	Remove Exactly Two brute force, data structures, dp, fft, graphs, greedy, sortings, trees		x6668
2063B	Subsequence Update data structures, greedy, sortings		x13822
2061G	Kevin and Teams 2-sat, binary search, bitmasks, brute force, chinese remainder theorem, combinatorics, constructive algorithms, data structures, dfs and similar, divide and conquer, dp, dsu, expression parsing, fft, flows, games, geometry, graph matchings, graphs, greedy, hashing, implementation, interactive, math, matrices, meet-in-the-middle, number theory, probabilities, schedules, shortest paths, sortings, string suffix structures, strings, ternary search, trees, two pointers		x226
2061F2	Kevin and Binary String (Hard Version) 2-sat, binary search, bitmasks, brute force, chinese remainder theorem, combinatorics, constructive algorithms, data structures, dfs and similar, divide and conquer, dp, dsu, expression parsing, fft, flows, games, geometry, graph matchings, graphs, greedy, hashing, implementation, interactive, math, matrices, meet-in-the-middle, number theory, probabilities, schedules, shortest paths, sortings, string suffix structures, strings, ternary search, trees, two pointers		x49
2061F1	Kevin and Binary String (Easy Version) 2-sat, binary search, bitmasks, brute force, chinese remainder theorem, combinatorics, constructive algorithms, data structures, dfs and similar, divide and conquer, dp, dsu, expression parsing, fft, flows, games, geometry, graph matchings, graphs, greedy, hashing, implementation, interactive, math, matrices, meet-in-the-middle, number theory, probabilities, schedules, shortest paths, sortings, string suffix structures, strings, ternary search, trees, two pointers		x1317
2061E	Kevin and And 2-sat, binary search, bitmasks, brute force, chinese remainder theorem, combinatorics, constructive algorithms, data structures, dfs and similar, divide and conquer, dp, dsu, expression parsing, fft, flows, games, geometry, graph matchings, graphs, greedy, hashing, implementation, interactive, math, matrices, meet-in-the-middle, number theory, probabilities, schedules, shortest paths, sortings, string suffix structures, strings, ternary search, trees, two pointers		x2168
2061D	Kevin and Numbers 2-sat, binary search, bitmasks, brute force, chinese remainder theorem, combinatorics, constructive algorithms, data structures, dfs and similar, divide and conquer, dp, dsu, expression parsing, fft, flows, games, geometry, graph matchings, graphs, greedy, hashing, implementation, interactive, math, matrices, meet-in-the-middle, number theory, probabilities, schedules, shortest paths, sortings, string suffix structures, strings, ternary search, trees, two pointers		x6198
2061C	Kevin and Puzzle 2-sat, binary search, bitmasks, brute force, chinese remainder theorem, combinatorics, constructive algorithms, data structures, dfs and similar, divide and conquer, dp, dsu, expression parsing, fft, flows, games, geometry, graph matchings, graphs, greedy, hashing, implementation, interactive, math, matrices, meet-in-the-middle, number theory, probabilities, schedules, shortest paths, sortings, string suffix structures, strings, ternary search, trees, two pointers		x5582
2061B	Kevin and Geometry 2-sat, binary search, bitmasks, brute force, chinese remainder theorem, combinatorics, constructive algorithms, data structures, dfs and similar, divide and conquer, dp, dsu, expression parsing, fft, flows, games, geometry, graph matchings, graphs, greedy, hashing, implementation, interactive, math, matrices, meet-in-the-middle, number theory, probabilities, schedules, shortest paths, sortings, string suffix structures, strings, ternary search, trees, two pointers		x9794
2061A	Kevin and Arithmetic 2-sat, binary search, bitmasks, brute force, chinese remainder theorem, combinatorics, constructive algorithms, data structures, dfs and similar, divide and conquer, dp, dsu, expression parsing, fft, flows, games, geometry, graph matchings, graphs, greedy, hashing, implementation, interactive, math, matrices, meet-in-the-middle, number theory, probabilities, schedules, shortest paths, sortings, string suffix structures, strings, ternary search, trees, two pointers		x15332
2060G	Bugged Sort dp, greedy, sortings		x489
2060C	Game of Mathletes games, greedy, sortings, two pointers		x21246
2060B	Farmer John's Card Game greedy, sortings		x19912
2057F	Formation binary search, data structures, dp, sortings, two pointers	3300	x171
2057E2	Another Exercise on Graphs (hard version) binary search, dfs and similar, dp, dsu, graphs, shortest paths, sortings	2500	x1308
2057E1	Another Exercise on Graphs (Easy Version) binary search, brute force, dp, dsu, graphs, shortest paths, sortings	2300	x1849
2057B	Gorilla and the Exam greedy, sortings	1000	x17872
2056B	Find the Permutation brute force, dfs and similar, graphs, implementation, sortings		x13068
2055E	Haystacks brute force, constructive algorithms, data structures, greedy, sortings		x256
2055B	Crafting constructive algorithms, greedy, sortings		x20950
2053D	Refined Product Optimality binary search, data structures, greedy, math, schedules, sortings	1700	x5991
2052J	Judicious Watching binary search, greedy, sortings	2000	x885
2051E	Best Price binary search, brute force, data structures, greedy, sortings	1600	x8107
2051D	Counting Pairs binary search, sortings, two pointers	1200	x16591
2048D	Kevin and Competition Memories binary search, brute force, data structures, greedy, sortings, two pointers	1600	x6397
2046C	Adventurers binary search, data structures, greedy, sortings, ternary search, two pointers	2100	x1680
2046B	Move Back at a Cost binary search, data structures, greedy, sortings	1600	x7654
2046A	Swap Columns and Find a Path greedy, sortings	1200	x12493
2045H	Missing Separators dp, sortings, string suffix structures, strings	2200	x478
2042D	Recommendations data structures, implementation, sortings, two pointers	1900	x3494
2042A	Greedy Monocarp greedy, sortings	800	x17596
2041I	Auto Complete binary search, data structures, hashing, implementation, sortings, strings, trees	2300	x461
2041A	The Bento Box Adventure implementation, sortings	1300	x7577
2039H2	Cool Swap Walk (Hard Version) constructive algorithms, constructive algorithms, constructive algorithms, implementation, sortings	3500	x48
2039H1	Cool Swap Walk (Easy Version) constructive algorithms, implementation, sortings	3500	x69
2038F	Alternative Platforms combinatorics, data structures, fft, math, sortings	2500	x376
2038C	DIY data structures, geometry, greedy, sortings	1400	x4557
2037F	Ardent Flames binary search, data structures, math, sortings, two pointers	2100	x2128
2036B	Startup greedy, sortings	800	x25473
2034G1	Simurgh's Watch (Easy Version) constructive algorithms, greedy, implementation, sortings	3500	x43
2034F2	Khayyam's Royal Decree (Hard Version) combinatorics, dp, math, sortings	2800	x379
2034F1	Khayyam's Royal Decree (Easy Version) combinatorics, dp, math, sortings	2500	x646
2034D	Darius' Wisdom constructive algorithms, greedy, implementation, sortings	1600	x4903
2032C	Trinity binary search, math, sortings, two pointers	1400	x12803
2031E	Penchick and Chloe's Trees data structures, dfs and similar, dp, greedy, implementation, math, sortings, trees	2100	x2128
2031B	Penchick and Satay Sticks brute force, greedy, sortings	900	x16827
2030D	QED's Favorite Permutation data structures, implementation, sortings	1700	x6776
2030A	A Gift From Orangutan constructive algorithms, greedy, math, sortings	800	x24745
2025C	New Game binary search, brute force, greedy, implementation, sortings, two pointers	1300	x15516
2024B	Buying Lemonade binary search, constructive algorithms, sortings	1100	x14267
2023A	Concatenation of Arrays constructive algorithms, greedy, math, sortings	1300	x13266
2021C2	Adjust The Presentation (Hard Version) constructive algorithms, data structures, greedy, implementation, sortings	1900	x3763
2021A	Meaning Mean data structures, greedy, math, sortings	800	x19326
2018E2	Complex Segments (Hard Version) binary search, data structures, divide and conquer, dsu, greedy, math, sortings	3400	x118
2018E1	Complex Segments (Easy Version) binary search, data structures, divide and conquer, dsu, greedy, math, sortings	3300	x161
2018D	Max Plus Min Plus Size data structures, dp, dsu, greedy, implementation, matrices, sortings	2200	x1720
2018C	Tree Pruning brute force, dfs and similar, greedy, sortings, trees	1700	x6522
2014D	Robert Hood and Mrs Hood brute force, data structures, greedy, sortings	1400	x12806
2005B2	The Strict Teacher (Hard Version) binary search, greedy, math, sortings	1200	x18224
2005B1	The Strict Teacher (Easy Version) greedy, math, sortings	1000	x21266
2004C	Splitting Items games, greedy, sortings	1100	x24089
2003C	Turtle and Good Pairs constructive algorithms, greedy, sortings, strings	1200	x19040
2003B	Turtle and Piggy Are Playing a Game 2 games, greedy, sortings	800	x25767
1996C	Sort dp, greedy, sortings, strings	1200	x23966
1995B2	Bouquet (Hard Version) binary search, data structures, greedy, math, sortings, two pointers	1700	x9056
1995B1	Bouquet (Easy Version) binary search, brute force, greedy, sortings, two pointers	1100	x18543
1992B	Angry Monk greedy, math, sortings	800	x35051
1992A	Only Pluses brute force, constructive algorithms, greedy, math, sortings	800	x42845
1991F	Triangle Formation brute force, greedy, implementation, math, sortings	2200	x2442
1990A	Submission Bait brute force, games, greedy, sortings	900	x23625
1989D	Smithing Skill brute force, data structures, dp, greedy, math, sortings, two pointers	1900	x6196
1986E	Beautiful Array greedy, math, number theory, sortings	1700	x9179
1986C	Update Queries data structures, greedy, sortings	1100	x23423
1986B	Matrix Stabilization brute force, data structures, greedy, sortings	1000	x27314
1986A	X Axis brute force, geometry, math, sortings	800	x42179
1984G	Magic Trick II constructive algorithms, implementation, sortings	3200	x265
1983D	Swap Dilemma constructive algorithms, data structures, divide and conquer, greedy, math, sortings	1700	x8566
1982F	Sorting Problem Again binary search, data structures, sortings	2600	x989
1982A	Soccer greedy, implementation, math, sortings	800	x25710
1980F2	Field Division (hard version) math, sortings	2400	x1051
1980F1	Field Division (easy version) data structures, math, sortings	1900	x3878
1980E	Permutation of Rows and Columns constructive algorithms, data structures, greedy, hashing, implementation, math, matrices, sortings	1600	x10950
1980B	Choosing Cubes sortings, sortings	800	x35512
1978A	Alice and Books constructive algorithms, greedy, sortings	800	x26325
1977C	Nikita and LCM brute force, data structures, dp, greedy, math, number theory, sortings	1900	x6967
1976F	Remove Bridges data structures, dfs and similar, dp, greedy, sortings, trees	2800	x638
1976A	Verify Password implementation, sortings, strings	800	x29451
1975B	378QAQ and Mocha's Array brute force, greedy, math, sortings	1000	x18556
1975A	Bazoka and Mocha's Array brute force, greedy, implementation, sortings	800	x19181
1974G	Money Buys Less Happiness Now data structures, greedy, sortings	2000	x4538
1974F	Cutting Game binary search, brute force, data structures, implementation, sortings, two pointers	1900	x3696
1974B	Symmetric Encoding implementation, sortings, strings	800	x31156
1973E	Cat, Fox and Swaps graphs, math, sortings	2500	x841
1973C	Cat, Fox and Double Maximum constructive algorithms, greedy, implementation, math, sortings	1700	x8665
1971G	XOUR data structures, dsu, sortings	1700	x9646
1971E	Find the Car binary search, math, sortings	1500	x15047
1971D	Binary Cut dp, greedy, implementation, sortings, strings	1100	x26812
1971A	My First Sorting Problem implementation, sortings	800	x48311
1970A1	Balanced Shuffle (Easy) implementation, sortings	1000	x5363
1969D	Shop Game data structures, greedy, math, sortings	1900	x4831

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