Problemset - Codeforces

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dsu

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Problems

#	Name
1620A	Equal or Not Equal constructive algorithms, dsu, implementation	800	x21209
217A	Ice Skating brute force, dfs and similar, dsu, graphs	1200	x20375
1249B1	Books Exchange (easy version) dsu, math	1000	x20126
977E	Cyclic Components dfs and similar, dsu, graphs	1500	x19251
1927D	Find the Different Ones! binary search, brute force, data structures, dp, dsu, greedy, two pointers	1300	x18250
1829E	The Lakes dfs and similar, dsu, graphs, implementation	1100	x18216
277A	Learning Languages dfs and similar, dsu	1400	x18112
1167C	News Distribution dfs and similar, dsu, graphs	1400	x17049
1249B2	Books Exchange (hard version) dfs and similar, dsu, math	1300	x16256
1365D	Solve The Maze constructive algorithms, dfs and similar, dsu, graphs, greedy, implementation, shortest paths	1700	x16154
1332C	K-Complete Word dfs and similar, dsu, greedy, implementation, strings	1500	x15665
501B	Misha and Changing Handles data structures, dsu, strings	1100	x15613
1592B	Hemose Shopping constructive algorithms, dsu, math, sortings	1200	x15583
771A	Bear and Friendship Condition dfs and similar, dsu, graphs	1500	x14635
1638C	Inversion Graph data structures, dsu, graphs, math	1300	x14368
1263D	Secret Passwords dfs and similar, dsu, graphs	1500	x13294
1559D1	Mocha and Diana (Easy Version) brute force, constructive algorithms, dsu, graphs, greedy, trees	1400	x13232
1292A	NEKO's Maze Game data structures, dsu, implementation	1400	x12936
356A	Knight Tournament data structures, dsu	1500	x12782
600E	Lomsat gelral data structures, dfs and similar, dsu, trees	2300	x12672
1534C	Little Alawn's Puzzle combinatorics, dp, dsu, graphs, math	1300	x12491
1702E	Split Into Two Sets dfs and similar, dsu, graphs	1600	x12344
1800E1	Unforgivable Curse (easy version) brute force, constructive algorithms, dsu, graphs, greedy, strings	1400	x12152
445B	DZY Loves Chemistry dfs and similar, dsu, greedy	1400	x12114
505B	Mr. Kitayuta's Colorful Graph dfs and similar, dp, dsu, graphs	1400	x12092
1726C	Jatayu's Balanced Bracket Sequence data structures, dsu, graphs, greedy	1300	x12074
1800E2	Unforgivable Curse (hard version) brute force, constructive algorithms, dfs and similar, dsu, graphs, greedy, strings	1500	x12051
1139C	Edgy Trees dfs and similar, dsu, graphs, math, trees	1500	x12029
755C	PolandBall and Forest dfs and similar, dsu, graphs, interactive, trees	1300	x11688
902B	Coloring a Tree dfs and similar, dsu, greedy	1200	x10475
1176E	Cover it! dfs and similar, dsu, graphs, shortest paths, trees	1700	x10439
25D	Roads not only in Berland dsu, graphs, trees	1900	x10369
1833E	Round Dance dfs and similar, dsu, graphs, shortest paths	1600	x10306
1383A	String Transformation 1 dsu, graphs, greedy, sortings, strings, trees, two pointers	1700	x10231
763A	Timofey and a tree dfs and similar, dp, dsu, graphs, implementation, trees	1600	x10114
1675E	Replace With the Previous, Minimize dsu, greedy, strings	1500	x10107
1909C	Heavy Intervals constructive algorithms, data structures, dsu, greedy, math, sortings	1400	x9946
1735C	Phase Shift dfs and similar, dsu, graphs, greedy, implementation, strings	1400	x9576
1670C	Where is the Pizza? data structures, dfs and similar, dsu, graphs, implementation, math	1400	x9514
1370D	Odd-Even Subsequence binary search, dp, dsu, greedy, implementation	2000	x9129
959B	Mahmoud and Ehab and the message dsu, greedy, implementation	1200	x9090
722C	Destroying Array data structures, dsu	1600	x8849
1253D	Harmonious Graph constructive algorithms, dfs and similar, dsu, graphs, greedy, sortings	1700	x8842
1209D	Cow and Snacks dfs and similar, dsu, graphs	1700	x8817
500B	New Year Permutation dfs and similar, dsu, graphs, greedy, math, sortings	1600	x8701
409H	A + B Strikes Back *special problem, brute force, constructive algorithms, dsu, implementation	1500	x8684
103B	Cthulhu dfs and similar, dsu, graphs	1500	x8529
1476D	Journey dfs and similar, dp, dsu, implementation	1700	x8382
1130C	Connect brute force, dfs and similar, dsu	1400	x8323
547B	Mike and Feet binary search, data structures, dp, dsu	1900	x8223
1620E	Replace the Numbers constructive algorithms, data structures, dsu, implementation	1900	x7772
1411C	Peaceful Rooks dfs and similar, dsu, graphs	1700	x7768
1850H	The Third Letter dfs and similar, dsu, graphs, greedy, implementation	1700	x7508
1779D	Boris and His Amazing Haircut constructive algorithms, data structures, dp, dsu, greedy, sortings	1700	x7501
515B	Drazil and His Happy Friends brute force, dsu, meet-in-the-middle, number theory	1300	x7363
659E	New Reform data structures, dfs and similar, dsu, graphs, greedy	1600	x7321
1845D	Rating System binary search, brute force, data structures, dp, dsu, greedy, math, two pointers	1800	x7319
939D	Love Rescue dfs and similar, dsu, graphs, greedy, strings	1600	x7135
1594D	The Number of Imposters constructive algorithms, dfs and similar, dp, dsu, graphs	1700	x7104
1242B	0-1 MST dfs and similar, dsu, graphs, sortings	1900	x6978
1609D	Social Network dsu, graphs, greedy, implementation, trees	1600	x6951
609E	Minimum spanning tree for each edge data structures, dfs and similar, dsu, graphs, trees	2100	x6950
1245D	Shichikuji and Power Grid dsu, graphs, greedy, shortest paths, trees	1900	x6908
723D	Lakes in Berland dfs and similar, dsu, graphs, greedy, implementation	1600	x6814
731C	Socks dfs and similar, dsu, graphs, greedy	1600	x6789
1213G	Path Queries divide and conquer, dsu, graphs, sortings, trees	1800	x6618
1873H	Mad City dfs and similar, dsu, games, graphs, shortest paths, trees	1700	x6589
1859D	Andrey and Escape from Capygrad binary search, data structures, dp, dsu, greedy, sortings	1800	x6546
1131F	Asya And Kittens constructive algorithms, dsu	1700	x6390
920F	SUM and REPLACE brute force, data structures, dsu, number theory	2000	x6229
490B	Queue dsu, implementation	1500	x5901
1095F	Make It Connected dsu, graphs, greedy	1900	x5851
920E	Connected Components? data structures, dfs and similar, dsu, graphs	2100	x5805
1872F	Selling a Menagerie dfs and similar, dsu, graphs, implementation, math	1800	x5802
1344B	Monopole Magnets constructive algorithms, dfs and similar, dsu, graphs	2000	x5773
698B	Fix a Tree constructive algorithms, dfs and similar, dsu, graphs, trees	1700	x5609
843A	Sorting by Subsequences dfs and similar, dsu, implementation, math, sortings	1400	x5547
1624G	MinOr Tree bitmasks, dfs and similar, dsu, graphs, greedy	1900	x5539
886C	Petya and Catacombs dsu, greedy, implementation, trees	1300	x5429
13E	Holes data structures, dsu	2700	x5371
371D	Vessels data structures, dsu, implementation, trees	1800	x5323
691D	Swaps in Permutation dfs and similar, dsu, math	1700	x5296
1922D	Berserk Monsters brute force, data structures, dsu, implementation, math	1900	x5225
875B	Sorting the Coins dsu, implementation, sortings, two pointers	1500	x5148
741B	Arpa's weak amphitheater and Mehrdad's valuable Hoses dfs and similar, dp, dsu	1600	x5140
455C	Civilization dfs and similar, dp, dsu, ternary search, trees	2100	x5133
1009F	Dominant Indices data structures, dsu, trees	2300	x5108
1920D	Array Repetition binary search, brute force, dsu, implementation, math	1900	x5089
1513D	GCD and MST constructive algorithms, dsu, graphs, greedy, number theory, sortings	2000	x5047
472D	Design Tutorial: Inverse the Problem dfs and similar, dsu, shortest paths, trees	1900	x5014
1833G	Ksyusha and Chinchilla constructive algorithms, dfs and similar, dp, dsu, greedy, implementation, trees	1800	x4946
1055B	Alice and Hairdresser dsu, implementation	1300	x4895
776D	The Door Problem 2-sat, dfs and similar, dsu, graphs	2000	x4819
1276B	Two Fairs combinatorics, dfs and similar, dsu, graphs	1900	x4667
17B	Hierarchy dfs and similar, dsu, greedy, shortest paths	1500	x4476
60B	Serial Time! dfs and similar, dsu	1400	x4441
28B	pSort dfs and similar, dsu, graphs	1600	x4407
817D	Imbalanced Array data structures, divide and conquer, dsu, sortings	1900	x4402
1442B	Identify the Operations combinatorics, data structures, dsu, greedy, implementation	1800	x4308
1857G	Counting Graphs combinatorics, divide and conquer, dsu, graphs, greedy, sortings, trees	2000	x4086

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