Problemset - Codeforces

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Codeforces Round (Div. 2)
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constructive algorithms

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Problems

#	Name
2205F	Simons and Reconstructing His Roads constructive algorithms, constructive algorithms, constructive algorithms, constructive algorithms, data structures, data structures, dsu, graphs	2400	x759
2205A	Simons and Making It Beautiful brute force, constructive algorithms, constructive algorithms, constructive algorithms, constructive algorithms, constructive algorithms, constructive algorithms	800	x19057
2204E	Sum of Digits (and Again) brute force, constructive algorithms, math	1800	x5419
2204D	Alternating Path constructive algorithms, dfs and similar, graph matchings, graphs, graphs, graphs, graphs	1400	x10510
2201G	Codeforces Heuristic Contest 1001 constructive algorithms	3500	x94
2201F2	Monotone Monochrome Matrices (Hard Version) constructive algorithms, data structures, hashing, math	2800	x489
2201B	Recollect Numbers constructive algorithms	1700	x5677
2199C	Minesweeper *special problem, constructive algorithms, greedy	1600	x593
2196F	Indivisible brute force, constructive algorithms, graphs	3300	x145
2195H	Codeforces Heuristic Contest 001 brute force, constructive algorithms, geometry, implementation	2400	x552
2194D	Table Cut constructive algorithms, greedy, implementation	1600	x9070
2192E	Swap to Rearrange constructive algorithms, dfs and similar, graph matchings, graphs, graphs, graphs, greedy, strings	2100	x2381
2192B	Flipping Binary String constructive algorithms, strings	1000	x16474
2191B	MEX Reordering constructive algorithms, sortings	1000	x21447
2191A	Array Coloring constructive algorithms	800	x29277
2190B1	Sub-RBS (Easy Version) combinatorics, constructive algorithms, dp, greedy, strings, two pointers	1400	x11898
2190A	Sorting Game constructive algorithms, games, greedy	1200	x18858
2189E	Majority Wins? constructive algorithms, greedy, math, strings	2600	x932
2189C2	XOR-convenience (Hard Version) bitmasks, constructive algorithms, math	1800	x6694
2189C1	XOR Convenience (Easy Version) bitmasks, constructive algorithms, math	1300	x15141
2189B	The Curse of the Frog constructive algorithms, greedy, math	1200	x16699
2188A	Divisible Permutation constructive algorithms	800	x27118
2187B	Shortest Statement Ever bitmasks, constructive algorithms, dp, greedy	1800	x5842
2185A	Perfect Root constructive algorithms, math	800	x47760
2183I2	Pairs Flipping (Hard Version) constructive algorithms	3500	x96
2183I1	Pairs Flipping (Easy Version) constructive algorithms	3500	x105
2183G	Snake Instructions constructive algorithms, greedy, interactive	3200	x256
2183D2	Tree Coloring (Hard Version) combinatorics, constructive algorithms, data structures, dfs and similar, greedy, implementation, trees	2100	x2661
2183D1	Tree Coloring (Easy Version) constructive algorithms, dfs and similar, greedy, trees	1500	x9641
2183B	Yet Another MEX Problem constructive algorithms, greedy	1100	x16990
2182A	New Year String constructive algorithms, greedy, implementation, strings	800	x26717
2181K	Knit the Grid 2-sat, constructive algorithms, graphs, matrices	3500	x97
2181E	Elevator Against Humanity brute force, constructive algorithms, greedy, sortings	2900	x172
2181C	Cacti Classification binary search, constructive algorithms, interactive, math	3200	x180
2180C	XOR-factorization bitmasks, constructive algorithms, dp, greedy, number theory	1900	x6909
2179F	Blackslex and Another RGB Walking communication, constructive algorithms, graphs, interactive, number theory, trees	2000	x3018
2179E	Blackslex and Girls constructive algorithms, geometry, math	1800	x6218
2179D	Blackslex and Penguin Civilization bitmasks, constructive algorithms, greedy, math	1300	x14513
2178D	Xmas or Hysteria constructive algorithms, greedy, implementation, math	1700	x7140
2175B	XOR Array constructive algorithms, math	1300	x13463
2174E1	Game of Scientists (Version 1) chinese remainder theorem, constructive algorithms, interactive, math	3100	x168
2173E	Shiro's Mirror Duel constructive algorithms, greedy, interactive, probabilities, sortings	2200	x1679
2173C	Kanade's Perfect Multiples brute force, constructive algorithms, greedy, number theory	1400	x13609
2172N	New Kingdom constructive algorithms, graphs, implementation	2800	x184
2171F	Rae Taylor and Trees (hard version) binary search, constructive algorithms, data structures, dp, dsu, greedy, implementation, trees	1600	x7939
2171E	Anisphia Wynn Palettia and Good Permutations constructive algorithms, greedy, number theory	2000	x3912
2170D	Almost Roman constructive algorithms, greedy, implementation	2200	x1809
2168C	Intercepting Butterflies bitmasks, communication, constructive algorithms, graphs, interactive		x946
2168B	Locate binary search, combinatorics, communication, constructive algorithms, greedy, interactive		x1677
2168A1	Encode and Decode (Easy Version) communication, constructive algorithms, interactive		x5482
2167C	Isamatdin and His Magic Wand! constructive algorithms, greedy, implementation, sortings	800	x38083
2165E	Rainbow Branch constructive algorithms, dp, greedy, trees	3200	x628
2165A	Cyclic Merging constructive algorithms, greedy	1300	x17272
2164G	Pointless Machine constructive algorithms, graphs, interactive, trees	3300	x356
2163B	Siga ta Kymata constructive algorithms, greedy, implementation, math	1700	x9748
2162G	Beautiful Tree constructive algorithms, math, probabilities, trees	2200	x2983
2162F	Beautiful Intervals constructive algorithms, greedy	2100	x3102
2162E	Beautiful Palindromes constructive algorithms, greedy, schedules	1600	x10080
2162C	Beautiful XOR bitmasks, constructive algorithms, greedy	1100	x22772
2162B	Beautiful String brute force, constructive algorithms	1000	x29439
2161C	Loyalty constructive algorithms, greedy, sortings, two pointers	1200	x13826
2159A	MAD Interactive Problem constructive algorithms, implementation, interactive	1700	x9736
2158F2	Distinct GCDs (Hard Version) combinatorics, constructive algorithms, graphs, math, number theory, number theory	3000	x327
2158F1	Distinct GCDs (Easy Version) constructive algorithms, graphs, math, number theory	2600	x491
2158D	Palindrome Flipping brute force, constructive algorithms, graphs, implementation, shortest paths, strings	2000	x3574
2158B	Split constructive algorithms, greedy, math	1200	x15184
2158A	Suspension constructive algorithms, greedy, math	800	x24676
2157H	Keygen 3 brute force, combinatorics, constructive algorithms, dfs and similar, math	3300	x571
2157G	Isaac's Queries bitmasks, brute force, constructive algorithms, dfs and similar, divide and conquer, dp, greedy, interactive, math, probabilities	2800	x996
2157F	Git Gud brute force, constructive algorithms, divide and conquer, math, ternary search	2400	x1902
2157C	Meximum Array 2 constructive algorithms, greedy, implementation, math	1400	x12071
2156D	Find the Last Number binary search, bitmasks, constructive algorithms, interactive	1900	x5666
2156A	Pizza Time brute force, constructive algorithms, greedy	800	x28063
2155D	Batteries brute force, constructive algorithms, graph matchings, graphs, interactive, math	1800	x6365
2155B	Abraham's Great Escape constructive algorithms, graphs	1100	x18209
2154F1	Bombing (Easy Version) brute force, combinatorics, constructive algorithms, implementation, math	2700	x619
2154D	Catshock constructive algorithms, dfs and similar, graphs, trees, two pointers	1900	x5260
2154B	Make it Zigzag constructive algorithms, greedy	1000	x21058
2153C	Symmetrical Polygons constructive algorithms, geometry, greedy, implementation, sortings	1500	x12593
2152E	Monotone Subsequence constructive algorithms, graphs, greedy, interactive, math	2100	x4823
2150F	Cycle Closing constructive algorithms, graphs, implementation, shortest paths, trees	3000	x328
2148D	Destruction of the Dandelion Fields constructive algorithms, greedy, sortings	1000	x28519
2147I2	Longest Increasing Path (Hard Version) constructive algorithms, math	3500	x187
2147I1	Longest Increasing Path (Easy Version) constructive algorithms, math	3300	x209
2147H	Maxflow GCD Coloring constructive algorithms, flows, graphs	3500	x569
2147C	Rabbits constructive algorithms, dp, greedy, implementation	1500	x12530
2147B	Multiple Construction constructive algorithms	1000	x19990
2147A	Shortest Increasing Path constructive algorithms, greedy	800	x21426
2146E	Yet Another MEX Problem brute force, constructive algorithms, data structures, divide and conquer, greedy, hashing	2300	x2231
2146D2	Max Sum OR (Hard Version) bitmasks, constructive algorithms, divide and conquer, greedy	2000	x4349
2146D1	Max Sum OR (Easy Version) bitmasks, constructive algorithms, divide and conquer, greedy, trees	1500	x11480
2146C	Wrong Binary Search binary search, constructive algorithms	1300	x14272
2145D	Inversion Value of a Permutation constructive algorithms, dfs and similar, dp	1800	x7198
2144F	Bracket Groups brute force, constructive algorithms, dp, string suffix structures, strings	2700	x1136
2144B	Maximum Cost Permutation constructive algorithms, greedy	1000	x19624
2144A	Cut the Array brute force, constructive algorithms, math, number theory	800	x22613
2143E	Make Good constructive algorithms, greedy, math, strings	2400	x2145
2143C	Max Tree constructive algorithms, dfs and similar, graphs, greedy	1300	x15303
2140B	Another Divisibility Problem constructive algorithms, math, number theory	900	x23776
2138F	Ode to the Bridge Builder constructive algorithms, geometry	3500	x100

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