Problemset - Codeforces

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Codeforces Round (Div. 2)
5 days

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Problems

#	Name
2170C	Quotient and Remainder binary search, greedy, two pointers	1300	x11373
2170B	Addition on a Segment greedy, math	1200	x14488
2170A	Maximum Neighborhood bitmasks, brute force, greedy, implementation, math	800	x20120
2169F	Subsequence Problem combinatorics, dp, fft, math	2700	x342
2169E	Points Selection dp, greedy	2400	x1083
2169D2	Removal of a Sequence (Hard Version) binary search, divide and conquer, greedy, implementation, math, number theory	2100	x2302
2169D1	Removal of a Sequence (Easy Version) binary search, implementation, math, number theory	1500	x8646
2169C	Range Operation dp, greedy, math, two pointers	1300	x12818
2169B	Drifting Away greedy, implementation	1100	x16265
2169A	Alice and Bob greedy, implementation	900	x19290
2168C	Intercepting Butterflies bitmasks, communication, constructive algorithms, graphs, interactive		x881
2168B	Locate binary search, combinatorics, communication, constructive algorithms, greedy, interactive		x1566
2168A2	Encode and Decode (Hard Version) bitmasks, communication, interactive, math		x3389
2168A1	Encode and Decode (Easy Version) communication, constructive algorithms, interactive		x5082
2167G	Mukhammadali and the Smooth Array data structures, dp	1600	x11133
2167F	Tree, TREE!!! dfs and similar, dp, math, trees	1600	x7219
2167E	khba Loves to Sleep! binary search, data structures, geometry, greedy, implementation	1600	x9180
2167D	Yet Another Array Problem brute force, implementation, math, number theory	1000	x30490
2167C	Isamatdin and His Magic Wand! constructive algorithms, greedy, implementation, sortings	800	x36293
2167B	Your Name sortings, strings	800	x52404
2167A	Square? math, sortings	800	x59188
2166B	Tab Closing math	900	x18303
2166A	Same Difference brute force, greedy, strings	800	x23056
2165F	Arctic Acquisition data structures, greedy	3500	x196
2165E	Rainbow Branch constructive algorithms, dp, greedy, trees	3200	x303
2165D	Path Split graph matchings, greedy	2500	x906
2165C	Binary Wine bitmasks, greedy, math	2000	x3844
2165B	Marble Council dp, math, sortings	1900	x4808
2165A	Cyclic Merging constructive algorithms, greedy	1300	x14466
2164H	PalindromePalindrome data structures, strings	3400	x45
2164G	Pointless Machine constructive algorithms, graphs, interactive, trees	3300	x214
2164F2	Chain Prefix Rank (Hard Version) binary search, combinatorics, data structures, dfs and similar, dp, graphs, math, trees	2900	x485
2164F1	Chain Prefix Rank (Easy Version) combinatorics, dfs and similar, dp, math, trees	2600	x738
2164E	Journey data structures, dfs and similar, dsu, graphs, greedy	2300	x1897
2164D	Copy String greedy, implementation, strings, two pointers	1800	x5239
2164C	Dungeon binary search, brute force, data structures, greedy, sortings	1400	x11046
2164B	Even Modulo Pair brute force, math, number theory	1000	x18650
2164A	Sequence Game brute force, sortings	800	x21197
2163E	Plegma bitmasks, combinatorics, communication, interactive	2700	x641
2163D2	Diadrash (Hard Version) binary search, interactive, math, sortings	2500	x1516
2163D1	Diadrash (Easy Version) binary search, brute force, divide and conquer, implementation, interactive	2100	x2752
2163C	Monopati brute force, combinatorics, dp, math, two pointers	1500	x9138
2163B	Siga ta Kymata constructive algorithms, greedy, implementation, math	1700	x9218
2163A	Souvlaki VS. Kalamaki brute force, greedy, math, sortings	800	x19698
2162H	Beautiful Problem dp	2900	x317
2162G	Beautiful Tree constructive algorithms, math, probabilities, trees	2200	x2825
2162F	Beautiful Intervals constructive algorithms, greedy	2100	x2938
2162E	Beautiful Palindromes constructive algorithms, greedy, schedules	1600	x9442
2162D	Beautiful Permutation binary search, interactive	1400	x12467
2162C	Beautiful XOR bitmasks, constructive algorithms, greedy	1100	x21503
2162B	Beautiful String brute force, constructive algorithms	1000	x28104
2162A	Beautiful Average brute force, greedy	800	x41861
2161H	Cycle Sort data structures	3500	x67
2161G	Bitwise And Equals bitmasks, greedy	3500	x92
2161F	SubMST combinatorics, graphs, trees	3000	x351
2161E	Left is Always Right combinatorics, implementation, math	2400	x788
2161D	Locked Out binary search, data structures, dp, greedy	2100	x2798
2161C	Loyalty constructive algorithms, greedy, sortings, two pointers	1200	x12714
2161B	Make Connected brute force, implementation	1700	x5414
2161A	Round Trip games, greedy, implementation, math	800	x15783
2160C	Reverse XOR bitmasks	1300	x15288
2160B	Distinct Elements greedy, math	1100	x17893
2160A	MEX Partition math	800	x22562
2159F	Grand Finale: Snakes binary search, interactive, ternary search	3500	x414
2159E	Super-Short-Polynomial-San math, meet-in-the-middle	3500	x359
2159D2	Inverse Minimum Partition (Hard Version) dp, greedy, math	3200	x398
2159D1	Inverse Minimum Partition (Easy Version) binary search, brute force, dp, geometry, greedy, math, two pointers	2500	x1101
2159C	Twin Polynomials combinatorics, graph matchings, math	2300	x1888
2159B	Rectangles brute force, data structures, dp, dsu, greedy, implementation, two pointers	2100	x2548
2159A	MAD Interactive Problem constructive algorithms, implementation, interactive	1700	x8345
2158F2	Distinct GCDs (Hard Version) combinatorics, constructive algorithms, graphs, math, number theory, number theory	3000	x258
2158F1	Distinct GCDs (Easy Version) constructive algorithms, graphs, math, number theory	2600	x415
2158E	Sink data structures, divide and conquer, dsu, graphs, implementation	2600	x638
2158D	Palindrome Flipping brute force, constructive algorithms, graphs, implementation, shortest paths, strings	2000	x3321
2158C	Annoying Game dp, games, greedy	1400	x11235
2158B	Split constructive algorithms, greedy, math	1200	x14131
2158A	Suspension constructive algorithms, greedy, math	800	x23571
2157I	Hyper Smawk Bros dp, dp, games	3500	x173
2157H	Keygen 3 brute force, combinatorics, constructive algorithms, dfs and similar, math	3200	x128
2157G	Isaac's Queries bitmasks, brute force, constructive algorithms, dfs and similar, divide and conquer, dp, greedy, interactive, math, probabilities	2800	x456
2157F	Git Gud brute force, constructive algorithms, divide and conquer, math, ternary search	2400	x1366
2157E	Adjusting Drones binary search, brute force, data structures, dp, dsu, greedy, implementation, sortings	1900	x3751
2157D	Billion Players Game binary search, greedy, math, sortings, ternary search, two pointers	1600	x6315
2157C	Meximum Array 2 constructive algorithms, greedy, implementation, math	1400	x9640
2157B	Expansion Plan 2 implementation, math	900	x13290
2157A	Dungeon Equilibrium greedy, implementation, sortings	800	x16900
2156F2	Strange Operation (Hard Version) data structures, greedy, trees	3000	x249
2156F1	Strange Operation (Easy Version) brute force, data structures, greedy, implementation, sortings	2200	x1628
2156E	Best Time to Buy and Sell Stock binary search, brute force, data structures, dp, games, graphs, greedy	2500	x966
2156D	Find the Last Number binary search, bitmasks, constructive algorithms, interactive	1900	x5410
2156C	Maximum GCD on Whiteboard greedy, math, number theory	1400	x12393
2156B	Strange Machine binary search, brute force, greedy, implementation	1000	x20930
2156A	Pizza Time brute force, constructive algorithms, greedy	800	x27009
2155F	Juan's Colorful Tree data structures, dfs and similar, dfs and similar, dsu, graphs, graphs, meet-in-the-middle, trees	2800	x660
2155E	Mimo & Yuyu games, greedy, math	2200	x2886
2155D	Batteries brute force, constructive algorithms, graph matchings, graphs, interactive, math	1800	x5944
2155C	The Ancient Wizards' Capes brute force, greedy, implementation	1500	x10380
2155B	Abraham's Great Escape constructive algorithms, graphs	1100	x17155
2155A	El fucho implementation, math	800	x25324
2154F2	Bombing (Hard Version) combinatorics, dp	3300	x176

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