Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round 945 (Div. 2)
3 days
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

dsu

Add tag

Problems

#	Name
979D	Kuro and GCD and XOR and SUM binary search, bitmasks, brute force, data structures, dp, dsu, greedy, math, number theory, strings, trees	2200	x1685
977E	Cyclic Components dfs and similar, dsu, graphs	1500	x19277
962G	Visible Black Areas data structures, dsu, geometry, trees	2800	x125
959B	Mahmoud and Ehab and the message dsu, greedy, implementation	1200	x9096
939D	Love Rescue dfs and similar, dsu, graphs, greedy, strings	1600	x7138
938G	Shortest Path Queries bitmasks, data structures, dsu, graphs	2900	x860
936E	Iqea data structures, dfs and similar, divide and conquer, dsu, shortest paths, trees	3400	x182
920F	SUM and REPLACE brute force, data structures, dsu, number theory	2000	x6231
920E	Connected Components? data structures, dfs and similar, dsu, graphs	2100	x5812
915F	Imbalance Value of a Tree data structures, dsu, graphs, trees	2400	x2312
902B	Coloring a Tree dfs and similar, dsu, greedy	1200	x10483
901C	Bipartite Segments binary search, data structures, dfs and similar, dsu, graphs, two pointers	2300	x1132
899E	Segments Removal data structures, dsu, flows, implementation, two pointers	2000	x2738
896E	Welcome home, Chtholly data structures, dsu	3100	x1968
891C	Envy data structures, dsu, graphs	2300	x2221
886C	Petya and Catacombs dsu, greedy, implementation, trees	1300	x5430
884E	Binary Matrix dsu	2500	x669
875F	Royal Questions dsu, graphs, greedy	2500	x1251
875B	Sorting the Coins dsu, implementation, sortings, two pointers	1500	x5148
873F	Forbidden Indices dsu, string suffix structures, strings	2400	x1293
870E	Points, Lines and Ready-made Titles dfs and similar, dsu, graphs, trees	2300	x975
859E	Desk Disorder combinatorics, dfs and similar, dsu, graphs, trees	2100	x1647
843A	Sorting by Subsequences dfs and similar, dsu, implementation, math, sortings	1400	x5558
817D	Imbalanced Array data structures, divide and conquer, dsu, sortings	1900	x4404
813F	Bipartite Checking data structures, dsu, graphs	2500	x1219
811E	Vladik and Entertaining Flags data structures, dsu, graphs	2600	x841
788B	Weird journey combinatorics, constructive algorithms, dfs and similar, dsu, graphs	2100	x2283
778C	Peterson Polyglot brute force, dfs and similar, dsu, hashing, strings, trees	2500	x863
776D	The Door Problem 2-sat, dfs and similar, dsu, graphs	2000	x4834
771A	Bear and Friendship Condition dfs and similar, dsu, graphs	1500	x14647
766D	Mahmoud and a Dictionary data structures, dfs and similar, dp, dsu, graphs	2000	x3268
765D	Artsem and Saunders constructive algorithms, dsu, math	1700	x2443
763E	Timofey and our friends animals data structures, divide and conquer, dsu	2900	x475
763A	Timofey and a tree dfs and similar, dp, dsu, graphs, implementation, trees	1600	x10129
755C	PolandBall and Forest dfs and similar, dsu, graphs, interactive, trees	1300	x11700
750H	New Year and Snowy Grid dfs and similar, dsu, graphs, interactive	3500	x187
741B	Arpa's weak amphitheater and Mehrdad's valuable Hoses dfs and similar, dp, dsu	1600	x5140
733F	Drivers Dissatisfaction data structures, dsu, graphs, trees	2200	x1088
731C	Socks dfs and similar, dsu, graphs, greedy	1600	x6792
723F	st-Spanning Tree dsu, graphs, greedy, implementation	2300	x1440
723D	Lakes in Berland dfs and similar, dsu, graphs, greedy, implementation	1600	x6815
722C	Destroying Array data structures, dsu	1600	x8855
715C	Digit Tree dfs and similar, divide and conquer, dsu, trees	2700	x1927
698B	Fix a Tree constructive algorithms, dfs and similar, dsu, graphs, trees	1700	x5609
696E	...Wait for it... data structures, dsu, trees	3000	x485
691D	Swaps in Permutation dfs and similar, dsu, math	1700	x5301
687D	Dividing Kingdom II brute force, data structures, dsu, graphs, sortings	2500	x854
679C	Bear and Square Grid dfs and similar, dsu, implementation	2400	x1132
670E	Correct Bracket Sequence Editor data structures, dsu, strings	1700	x3155
659F	Polycarp and Hay dfs and similar, dsu, graphs, greedy, sortings	2000	x1750
659E	New Reform data structures, dfs and similar, dsu, graphs, greedy	1600	x7324
653E	Bear and Forgotten Tree 2 dfs and similar, dsu, graphs, trees	2400	x1378
652E	Pursuit For Artifacts dfs and similar, dsu, graphs, trees	2300	x1960
650E	Clockwork Bomb data structures, dfs and similar, dsu, greedy, trees	3200	x586
650C	Table Compression dfs and similar, dp, dsu, graphs, greedy	2200	x1940
627F	Island Puzzle dfs and similar, dsu, graphs, trees	3400	x233
609E	Minimum spanning tree for each edge data structures, dfs and similar, dsu, graphs, trees	2100	x6958
603E	Pastoral Oddities data structures, divide and conquer, dsu, math, trees	3000	x1157
603B	Moodular Arithmetic combinatorics, dfs and similar, dsu, math, number theory	1800	x2535
601D	Acyclic Organic Compounds data structures, dfs and similar, dsu, hashing, strings, trees	2400	x1088
600E	Lomsat gelral data structures, dfs and similar, dsu, trees	2300	x12694
571D	Campus binary search, data structures, dsu, trees	3100	x648
566D	Restructuring Company data structures, dsu	1900	x3097
553C	Love Triangles dfs and similar, dsu, graphs	2200	x1735
547B	Mike and Feet binary search, data structures, dp, dsu	1900	x8230
516D	Drazil and Morning Exercise dfs and similar, dp, dsu, trees, two pointers	2800	x1224
515B	Drazil and His Happy Friends brute force, dsu, meet-in-the-middle, number theory	1300	x7364
506D	Mr. Kitayuta's Colorful Graph brute force, dfs and similar, dsu, graphs	2400	x2030
505B	Mr. Kitayuta's Colorful Graph dfs and similar, dp, dsu, graphs	1400	x12099
501B	Misha and Changing Handles data structures, dsu, strings	1100	x15628
500E	New Year Domino data structures, dp, dsu	2300	x1394
500B	New Year Permutation dfs and similar, dsu, graphs, greedy, math, sortings	1600	x8706
490B	Queue dsu, implementation	1500	x5901
472D	Design Tutorial: Inverse the Problem dfs and similar, dsu, shortest paths, trees	1900	x5023
471E	MUH and Lots and Lots of Segments data structures, dsu	2700	x80
468B	Two Sets 2-sat, dfs and similar, dsu, graph matchings, greedy	2000	x3947
466E	Information Graph dfs and similar, dsu, graphs, trees	2100	x2059
461D	Appleman and Complicated Task dsu, math	2800	x355
455C	Civilization dfs and similar, dp, dsu, ternary search, trees	2100	x5145
452E	Three strings data structures, dsu, string suffix structures, strings	2400	x1037
445B	DZY Loves Chemistry dfs and similar, dsu, greedy	1400	x12120
444E	DZY Loves Planting binary search, dsu, trees	2700	x744
441D	Valera and Swaps constructive algorithms, dsu, graphs, implementation, math, string suffix structures	2100	x1060
437D	The Child and Zoo dsu, sortings	1900	x3135
436C	Dungeons and Candies dsu, graphs, greedy, trees	1800	x2580
433D	Nanami's Digital Board dsu, implementation	2000	x1036
409H	A + B Strikes Back *special problem, brute force, constructive algorithms, dsu, implementation	1500	x8689
400D	Dima and Bacteria dsu, graphs, shortest paths	2000	x2800
374E	Inna and Babies binary search, data structures, dsu, geometry, implementation	2600	x178
371D	Vessels data structures, dsu, implementation, trees	1800	x5331
366D	Dima and Trap Graph binary search, data structures, dfs and similar, dsu, shortest paths, two pointers	2000	x1270
362D	Fools and Foolproof Roads data structures, dfs and similar, dsu, graphs, greedy	2100	x895
358E	Dima and Kicks brute force, dsu, graphs, implementation	2300	x386
356A	Knight Tournament data structures, dsu	1500	x12794
325E	The Red Button combinatorics, dfs and similar, dsu, graphs, greedy	2800	x752
325D	Reclamation dsu	2900	x484
313E	Ilya and Two Numbers constructive algorithms, data structures, dsu, greedy	2300	x540
292D	Connected Components data structures, dfs and similar, dp, dsu	1900	x2310
277A	Learning Languages dfs and similar, dsu	1400	x18123
260D	Black and White Tree constructive algorithms, dsu, graphs, greedy, trees	2100	x1314