Problemset - Codeforces

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Codeforces Round 940 (Div. 2)
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dsu

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Problems

#	Name
977E	Cyclic Components dfs and similar, dsu, graphs	1500	x19071
962G	Visible Black Areas data structures, dsu, geometry, trees	2800	x124
959B	Mahmoud and Ehab and the message dsu, greedy, implementation	1200	x9057
939D	Love Rescue dfs and similar, dsu, graphs, greedy, strings	1600	x7068
938G	Shortest Path Queries bitmasks, data structures, dsu, graphs	2900	x851
936E	Iqea data structures, dfs and similar, divide and conquer, dsu, shortest paths, trees	3400	x181
920F	SUM and REPLACE brute force, data structures, dsu, number theory	2000	x6164
920E	Connected Components? data structures, dfs and similar, dsu, graphs	2100	x5737
915F	Imbalance Value of a Tree data structures, dsu, graphs, trees	2400	x2288
902B	Coloring a Tree dfs and similar, dsu, greedy	1200	x10430
901C	Bipartite Segments binary search, data structures, dfs and similar, dsu, graphs, two pointers	2300	x1128
899E	Segments Removal data structures, dsu, flows, implementation, two pointers	2000	x2722
896E	Welcome home, Chtholly data structures, dsu	3100	x1955
891C	Envy data structures, dsu, graphs	2300	x2205
886C	Petya and Catacombs dsu, greedy, implementation, trees	1300	x5421
884E	Binary Matrix dsu	2500	x662
875F	Royal Questions dsu, graphs, greedy	2500	x1238
875B	Sorting the Coins dsu, implementation, sortings, two pointers	1500	x5111
873F	Forbidden Indices dsu, string suffix structures, strings	2400	x1284
870E	Points, Lines and Ready-made Titles dfs and similar, dsu, graphs, trees	2300	x971
859E	Desk Disorder combinatorics, dfs and similar, dsu, graphs, trees	2100	x1636
843A	Sorting by Subsequences dfs and similar, dsu, implementation, math, sortings	1400	x5518
817D	Imbalanced Array data structures, divide and conquer, dsu, sortings	1900	x4376
813F	Bipartite Checking data structures, dsu, graphs	2500	x1204
811E	Vladik and Entertaining Flags data structures, dsu, graphs	2600	x784
788B	Weird journey combinatorics, constructive algorithms, dfs and similar, dsu, graphs	2100	x2276
778C	Peterson Polyglot brute force, dfs and similar, dsu, hashing, strings, trees	2500	x845
776D	The Door Problem 2-sat, dfs and similar, dsu, graphs	2000	x4765
771A	Bear and Friendship Condition dfs and similar, dsu, graphs	1500	x14554
766D	Mahmoud and a Dictionary data structures, dfs and similar, dp, dsu, graphs	2000	x3257
765D	Artsem and Saunders constructive algorithms, dsu, math	1700	x2392
763E	Timofey and our friends animals data structures, divide and conquer, dsu	2900	x472
763A	Timofey and a tree dfs and similar, dp, dsu, graphs, implementation, trees	1600	x10065
755C	PolandBall and Forest dfs and similar, dsu, graphs, interactive, trees	1300	x11362
750H	New Year and Snowy Grid dfs and similar, dsu, graphs, interactive	3500	x186
741B	Arpa's weak amphitheater and Mehrdad's valuable Hoses dfs and similar, dp, dsu	1600	x5121
733F	Drivers Dissatisfaction data structures, dsu, graphs, trees	2200	x1087
731C	Socks dfs and similar, dsu, graphs, greedy	1600	x6715
723F	st-Spanning Tree dsu, graphs, greedy, implementation	2300	x1436
723D	Lakes in Berland dfs and similar, dsu, graphs, greedy, implementation	1600	x6796
722C	Destroying Array data structures, dsu	1600	x8767
715C	Digit Tree dfs and similar, divide and conquer, dsu, trees	2700	x1895
698B	Fix a Tree constructive algorithms, dfs and similar, dsu, graphs, trees	1700	x5598
696E	...Wait for it... data structures, dsu, trees	3000	x461
691D	Swaps in Permutation dfs and similar, dsu, math	1700	x5226
687D	Dividing Kingdom II brute force, data structures, dsu, graphs, sortings	2500	x848
679C	Bear and Square Grid dfs and similar, dsu, implementation	2400	x1128
670E	Correct Bracket Sequence Editor data structures, dsu, strings	1700	x3137
659F	Polycarp and Hay dfs and similar, dsu, graphs, greedy, sortings	2000	x1747
659E	New Reform data structures, dfs and similar, dsu, graphs, greedy	1600	x7286
653E	Bear and Forgotten Tree 2 dfs and similar, dsu, graphs, trees	2400	x1373
652E	Pursuit For Artifacts dfs and similar, dsu, graphs, trees	2300	x1941
650E	Clockwork Bomb data structures, dfs and similar, dsu, greedy, trees	3200	x583
650C	Table Compression dfs and similar, dp, dsu, graphs, greedy	2200	x1937
627F	Island Puzzle dfs and similar, dsu, graphs, trees	3400	x228
609E	Minimum spanning tree for each edge data structures, dfs and similar, dsu, graphs, trees	2100	x6882
603E	Pastoral Oddities data structures, divide and conquer, dsu, math, trees	3000	x1147
603B	Moodular Arithmetic combinatorics, dfs and similar, dsu, math, number theory	1800	x2532
601D	Acyclic Organic Compounds data structures, dfs and similar, dsu, hashing, strings, trees	2400	x1081
600E	Lomsat gelral data structures, dfs and similar, dsu, trees	2300	x12529
571D	Campus binary search, data structures, dsu, trees	3100	x646
566D	Restructuring Company data structures, dsu	1900	x3082
553C	Love Triangles dfs and similar, dsu, graphs	2200	x1724
547B	Mike and Feet binary search, data structures, dp, dsu	1900	x8167
516D	Drazil and Morning Exercise dfs and similar, dp, dsu, trees, two pointers	2800	x1219
515B	Drazil and His Happy Friends brute force, dsu, meet-in-the-middle, number theory	1300	x7352
506D	Mr. Kitayuta's Colorful Graph brute force, dfs and similar, dsu, graphs	2400	x2011
505B	Mr. Kitayuta's Colorful Graph dfs and similar, dp, dsu, graphs	1400	x11985
501B	Misha and Changing Handles data structures, dsu, strings	1100	x15525
500E	New Year Domino data structures, dp, dsu	2300	x1387
500B	New Year Permutation dfs and similar, dsu, graphs, greedy, math, sortings	1600	x8672
490B	Queue dsu, implementation	1500	x5883
472D	Design Tutorial: Inverse the Problem dfs and similar, dsu, shortest paths, trees	1900	x4974
471E	MUH and Lots and Lots of Segments data structures, dsu	2700	x79
468B	Two Sets 2-sat, dfs and similar, dsu, graph matchings, greedy	2000	x3757
466E	Information Graph dfs and similar, dsu, graphs, trees	2100	x2050
461D	Appleman and Complicated Task dsu, math	2800	x354
455C	Civilization dfs and similar, dp, dsu, ternary search, trees	2100	x5111
452E	Three strings data structures, dsu, string suffix structures, strings	2400	x1021
445B	DZY Loves Chemistry dfs and similar, dsu, greedy	1400	x11963
444E	DZY Loves Planting binary search, dsu, trees	2700	x732
441D	Valera and Swaps constructive algorithms, dsu, graphs, implementation, math, string suffix structures	2100	x1057
437D	The Child and Zoo dsu, sortings	1900	x3129
436C	Dungeons and Candies dsu, graphs, greedy, trees	1800	x2577
433D	Nanami's Digital Board dsu, implementation	2000	x1034
409H	A + B Strikes Back *special problem, brute force, constructive algorithms, dsu, implementation	1500	x8616
400D	Dima and Bacteria dsu, graphs, shortest paths	2000	x2788
374E	Inna and Babies binary search, data structures, dsu, geometry, implementation	2600	x175
371D	Vessels data structures, dsu, implementation, trees	1800	x5208
366D	Dima and Trap Graph binary search, data structures, dfs and similar, dsu, shortest paths, two pointers	2000	x1266
362D	Fools and Foolproof Roads data structures, dfs and similar, dsu, graphs, greedy	2100	x891
358E	Dima and Kicks brute force, dsu, graphs, implementation	2300	x383
356A	Knight Tournament data structures, dsu	1500	x12690
325E	The Red Button combinatorics, dfs and similar, dsu, graphs, greedy	2800	x741
325D	Reclamation dsu	2900	x483
313E	Ilya and Two Numbers constructive algorithms, data structures, dsu, greedy	2300	x538
292D	Connected Components data structures, dfs and similar, dp, dsu	1900	x2302
277A	Learning Languages dfs and similar, dsu	1400	x18003
260D	Black and White Tree constructive algorithms, dsu, graphs, greedy, trees	2100	x1307
228E	The Road to Berland is Paved With Good Intentions 2-sat, dfs and similar, dsu, graphs	1900	x2303