Problemset - Codeforces

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Codeforces Round (Div. 3)
7 days

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Problems

#	Name
1399A	Remove Smallest greedy, sortings	800	x63658
1398G	Running Competition bitmasks, fft, math, number theory	2600	x779
1398F	Controversial Rounds binary search, data structures, dp, greedy, two pointers	2500	x1071
1398E	Two Types of Spells binary search, data structures, greedy, implementation, math, sortings	2200	x2183
1398D	Colored Rectangles dp, greedy, sortings	1800	x11073
1398C	Good Subarrays data structures, dp, math	1600	x24629
1398B	Substring Removal Game games, greedy, sortings	800	x24151
1398A	Bad Triangle geometry, math	800	x27103
1397B	Power Sequence brute force, math, number theory, sortings	1500	x14417
1397A	Juggling Letters greedy, strings	800	x28224
1396E	Distance Matching constructive algorithms, dfs and similar, trees	3200	x332
1396D	Rainbow Rectangles data structures, sortings, two pointers	3300	x299
1396C	Monster Invaders dp, greedy, implementation	2300	x2402
1396B	Stoned Game brute force, constructive algorithms, games, greedy	1800	x10977
1396A	Multiples of Length constructive algorithms, greedy, number theory	1600	x15053
1395C	Boboniu and Bit Operations bitmasks, brute force, dp, greedy	1600	x13609
1395B	Boboniu Plays Chess constructive algorithms	1100	x15797
1395A	Boboniu Likes to Color Balls brute force, math	1000	x23578
1394E	Boboniu and Banknote Collection strings	3500	x138
1394D	Boboniu and Jianghu dp, greedy, sortings, trees	2800	x812
1394C	Boboniu and String binary search, geometry, ternary search	2600	x906
1394B	Boboniu Walks on Graph brute force, dfs and similar, graphs, hashing	2300	x1796
1394A	Boboniu Chats with Du dp, greedy, sortings, two pointers	1800	x6486
1393E2	Twilight and Ancient Scroll (harder version) dp, hashing, implementation, string suffix structures, strings, two pointers	3200	x353
1393E1	Twilight and Ancient Scroll (easier version) dp, hashing, implementation, string suffix structures, strings	2800	x375
1393D	Rarity and New Dress dfs and similar, dp, implementation, shortest paths	2100	x3784
1393C	Pinkie Pie Eats Patty-cakes constructive algorithms, greedy, math, sortings	1700	x10302
1393B	Applejack and Storages constructive algorithms, data structures, greedy, implementation	1400	x16331
1393A	Rainbow Dash, Fluttershy and Chess Coloring greedy, math	800	x20244
1392I	Kevin and Grid fft, graphs, math	3300	x204
1392H	ZS Shuffles Cards combinatorics, dp, math, probabilities	3000	x682
1392G	Omkar and Pies bitmasks, dfs and similar, dp, math, shortest paths	2900	x452
1392F	Omkar and Landslide binary search, constructive algorithms, data structures, greedy, math	2400	x1948
1392E	Omkar and Duck bitmasks, constructive algorithms, interactive, math	2100	x3278
1392D	Omkar and Bed Wars dp, greedy	1700	x8506
1392C	Omkar and Waterslide greedy, implementation	1200	x18370
1392B	Omkar and Infinity Clock implementation, math	800	x18414
1392A	Omkar and Password greedy, math	800	x20262
1391E	Pairs of Pairs constructive algorithms, dfs and similar, graphs, greedy, trees	2600	x1459
1391D	505 bitmasks, brute force, constructive algorithms, dp, greedy, implementation	2000	x4967
1391C	Cyclic Permutations combinatorics, dp, graphs, math	1500	x14615
1391B	Fix You brute force, greedy, implementation	800	x26303
1391A	Suborrays constructive algorithms, math	800	x24048
1389G	Directing Edges dfs and similar, dp, graphs, trees	2800	x384
1389F	Bicolored Segments data structures, dp, graph matchings, sortings	2600	x951
1389E	Calendar Ambiguity math, number theory	2200	x3125
1389D	Segment Intersections brute force, greedy, implementation, math	2100	x4042
1389C	Good String brute force, dp, greedy, two pointers	1500	x18509
1389B	Array Walk brute force, dp, greedy	1600	x16002
1389A	LCM Problem constructive algorithms, greedy, math, number theory	800	x39045
1388E	Uncle Bogdan and Projections data structures, geometry, sortings	2700	x400
1388D	Captain Flint and Treasure data structures, dfs and similar, graphs, greedy, implementation, trees	2000	x6154
1388C	Uncle Bogdan and Country Happiness dfs and similar, greedy, math, trees	1800	x9405
1388B	Captain Flint and a Long Voyage greedy, math	1000	x21968
1388A	Captain Flint and Crew Recruitment brute force, greedy, math, number theory	800	x24601
1387C	Viruses *special problem, dp, shortest paths, string suffix structures	2900	x127
1387B2	Village (Maximum) *special problem, dfs and similar, trees	2500	x825
1387B1	Village (Minimum) *special problem, dp, greedy, trees	2100	x1349
1387A	Graph *special problem, binary search, dfs and similar, dp, math, ternary search	2100	x676
1386C	Joker *special problem, bitmasks, data structures, divide and conquer, dsu	2800	x440
1386B	Mixture *special problem, data structures, geometry, math, sortings	2900	x120
1386A	Colors *special problem, binary search, constructive algorithms, interactive	2700	x254
1385G	Columns Swaps 2-sat, dfs and similar, dsu, graphs, implementation	2300	x1332
1385F	Removing Leaves data structures, greedy, implementation, trees	2300	x2268
1385E	Directing Edges constructive algorithms, dfs and similar, graphs	2000	x6908
1385D	a-Good String bitmasks, brute force, divide and conquer, dp, implementation	1500	x18523
1385C	Make It Good greedy	1200	x26317
1385B	Restore the Permutation by Merger greedy	800	x36457
1385A	Three Pairwise Maximums math	800	x37926
1384B2	Koa and the Beach (Hard Version) constructive algorithms, dp, greedy, implementation	2200	x2473
1384B1	Koa and the Beach (Easy Version) brute force, dp, greedy	1900	x3859
1384A	Common Prefixes constructive algorithms, greedy, strings	1200	x18430
1383F	Special Edges flows, graphs	3200	x327
1383E	Strange Operation combinatorics, data structures, dp	2800	x757
1383D	Rearrange brute force, constructive algorithms, graphs, greedy, sortings	2800	x659
1383C	String Transformation 2 bitmasks, dp, graphs, trees	3100	x564
1383B	GameGame bitmasks, constructive algorithms, dp, games, greedy, math	1900	x4787
1383A	String Transformation 1 dsu, graphs, greedy, sortings, strings, trees, two pointers	1700	x10271
1382B	Sequential Nim dp, games	1100	x24059
1382A	Common Subsequence brute force	800	x26124
1381E	Origami geometry, math, sortings	3300	x102
1381D	The Majestic Brown Tree Snake dfs and similar, dp, greedy, trees, two pointers	3000	x455
1381C	Mastermind constructive algorithms, graph matchings, greedy, implementation, sortings, two pointers	2500	x1396
1381B	Unmerge dp	1800	x8539
1381A2	Prefix Flip (Hard Version) constructive algorithms, data structures, implementation, strings, two pointers	1700	x12811
1381A1	Prefix Flip (Easy Version) constructive algorithms, data structures, strings	1300	x19919
1380G	Circular Dungeon greedy, math, probabilities	2600	x776
1380F	Strange Addition data structures, dp, matrices	2600	x766
1380E	Merging Towers data structures, dsu, implementation, trees	2300	x1924
1380D	Berserk And Fireball constructive algorithms, greedy, implementation, math, two pointers	2000	x4645
1380C	Create The Teams brute force, dp, greedy, implementation, sortings	1400	x20047
1380B	Universal Solution greedy	1400	x14277
1380A	Three Indices brute force, data structures	900	x24018
1379F2	Chess Strikes Back (hard version) data structures, divide and conquer	2800	x473
1379F1	Chess Strikes Back (easy version) binary search, data structures	2700	x578
1379E	Inverse Genealogy constructive algorithms, divide and conquer, dp, math, trees	2800	x406
1379D	New Passenger Trams binary search, brute force, data structures, sortings, two pointers	2300	x1063
1379C	Choosing flowers binary search, brute force, data structures, dfs and similar, dp, greedy, sortings, two pointers	2000	x5448
1379B	Dubious Cyrpto binary search, brute force, math, number theory	1500	x12525
1379A	Acacius and String brute force, implementation, strings	1500	x11634