Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round (Div. 1, Based on Zhili Cup 2026)
5 days
Register now »

*has extra registration

Before contest
Codeforces Round (Div. 2, Based on Zhili Cup 2026)
5 days
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

dsu

Add tag

Problems

#	Name
763E	Timofey and our friends animals data structures, divide and conquer, dsu	2900	x551
763A	Timofey and a tree dfs and similar, dp, dsu, graphs, implementation, trees	1600	x11864
755C	PolandBall and Forest dfs and similar, dsu, graphs, interactive, trees	1300	x14992
750H	New Year and Snowy Grid dfs and similar, dsu, graphs, interactive	3500	x239
741B	Arpa's weak amphitheater and Mehrdad's valuable Hoses dfs and similar, dp, dsu	1600	x5900
733F	Drivers Dissatisfaction data structures, dsu, graphs, trees	2200	x1321
731C	Socks dfs and similar, dsu, graphs, greedy	1600	x7857
723F	st-Spanning Tree dsu, graphs, greedy, implementation	2300	x1750
723D	Lakes in Berland dfs and similar, dsu, graphs, greedy, implementation	1600	x7504
722C	Destroying Array data structures, dsu	1600	x11462
715C	Digit Tree dfs and similar, divide and conquer, dsu, trees	2700	x2583
698B	Fix a Tree constructive algorithms, dfs and similar, dsu, graphs, trees	1700	x6180
696E	...Wait for it... data structures, dsu, trees	3000	x629
691D	Swaps in Permutation dfs and similar, dsu, math	1700	x6553
687D	Dividing Kingdom II brute force, data structures, dsu, graphs, sortings	2500	x1051
679C	Bear and Square Grid dfs and similar, dsu, implementation	2400	x1265
670E	Correct Bracket Sequence Editor data structures, dsu, strings	1700	x3464
659F	Polycarp and Hay dfs and similar, dsu, graphs, greedy, sortings	2000	x1954
659E	New Reform data structures, dfs and similar, dsu, graphs, greedy	1600	x7988
653E	Bear and Forgotten Tree 2 dfs and similar, dsu, graphs, trees	2400	x1738
652E	Pursuit For Artifacts dfs and similar, dsu, graphs, trees	2300	x2859
650E	Clockwork Bomb data structures, dfs and similar, dsu, greedy, trees	3200	x680
650C	Table Compression dfs and similar, dp, dsu, graphs, greedy	2200	x2179
627F	Island Puzzle dfs and similar, dsu, graphs, trees	3400	x251
609E	Minimum spanning tree for each edge data structures, dfs and similar, dsu, graphs, trees	2100	x10257
603E	Pastoral Oddities data structures, divide and conquer, dsu, math, trees	3000	x1543
603B	Moodular Arithmetic combinatorics, dfs and similar, dsu, math, number theory	1800	x2710
601D	Acyclic Organic Compounds data structures, dfs and similar, dsu, hashing, strings, trees	2400	x1245
600E	Lomsat gelral data structures, dfs and similar, dsu, trees	2300	x18361
571D	Campus binary search, data structures, dsu, trees	3100	x808
566D	Restructuring Company data structures, dsu	1900	x3944
553C	Love Triangles dfs and similar, dsu, graphs	2200	x1965
547B	Mike and Feet binary search, data structures, dp, dsu	1900	x10881
516D	Drazil and Morning Exercise dfs and similar, dp, dsu, trees, two pointers	2800	x1525
515B	Drazil and His Happy Friends brute force, dsu, meet-in-the-middle, number theory	1300	x7763
506D	Mr. Kitayuta's Colorful Graph brute force, dfs and similar, dsu, graphs	2400	x2533
505B	Mr. Kitayuta's Colorful Graph dfs and similar, dp, dsu, graphs	1400	x14970
501B	Misha and Changing Handles data structures, dsu, strings	1100	x19405
500E	New Year Domino data structures, dp, dsu	2300	x1582
500B	New Year Permutation dfs and similar, dsu, graphs, greedy, math, sortings	1600	x9598
490B	Queue dsu, implementation	1500	x6421
472D	Design Tutorial: Inverse the Problem dfs and similar, dsu, shortest paths, trees	1900	x6514
471E	MUH and Lots and Lots of Segments data structures, dsu	2700	x88
468B	Two Sets 2-sat, dfs and similar, dsu, graph matchings, greedy	2000	x5264
466E	Information Graph dfs and similar, dsu, graphs, trees	2100	x2616
461D	Appleman and Complicated Task dsu, math	2800	x401
455C	Civilization dfs and similar, dp, dsu, ternary search, trees	2100	x6462
452E	Three strings data structures, dsu, string suffix structures, strings	2400	x1197
445B	DZY Loves Chemistry dfs and similar, dsu, greedy	1400	x14745
444E	DZY Loves Planting binary search, dsu, trees	2700	x856
441D	Valera and Swaps constructive algorithms, dsu, graphs, implementation, math, string suffix structures	2100	x1199
437D	The Child and Zoo dsu, sortings	1900	x3667
436C	Dungeons and Candies dsu, graphs, greedy, trees	1800	x2886
433D	Nanami's Digital Board dsu, implementation	2000	x1317
409H	A + B Strikes Back *special problem, brute force, constructive algorithms, dsu, implementation	1500	x9486
400D	Dima and Bacteria dsu, graphs, shortest paths	2000	x3170
374E	Inna and Babies binary search, data structures, dsu, geometry, implementation	2600	x206
371D	Vessels data structures, dsu, implementation, trees	1800	x6471
366D	Dima and Trap Graph binary search, data structures, dfs and similar, dsu, shortest paths, two pointers	2000	x1722
362D	Fools and Foolproof Roads data structures, dfs and similar, dsu, graphs, greedy	2100	x1020
358E	Dima and Kicks brute force, dsu, graphs, implementation	2300	x432
356A	Knight Tournament data structures, dsu	1500	x16761
325E	The Red Button combinatorics, dfs and similar, dsu, graphs, greedy	2800	x949
325D	Reclamation dsu	2900	x579
313E	Ilya and Two Numbers constructive algorithms, data structures, dsu, greedy	2300	x599
292D	Connected Components data structures, dfs and similar, dp, dsu	1900	x2770
277A	Learning Languages dfs and similar, dsu	1400	x21554
260D	Black and White Tree constructive algorithms, dsu, graphs, greedy, trees	2100	x1665
228E	The Road to Berland is Paved With Good Intentions 2-sat, dfs and similar, dsu, graphs	1900	x2815
217E	Alien DNA data structures, dsu, trees	2800	x354
217A	Ice Skating brute force, dfs and similar, dsu, graphs	1200	x24305
212D	Cutting a Fence binary search, data structures, dsu	2500	x614
209C	Trails and Glades constructive algorithms, dsu, graphs, greedy	2400	x875
196E	Opening Portals dsu, graphs, shortest paths	2600	x1203
195E	Building Forest data structures, dsu, graphs	2000	x859
190E	Counter Attack data structures, dsu, graphs, hashing, sortings	2100	x1736
187C	Weak Memory dfs and similar, dsu	2000	x1578
177C2	Party brute force, dfs and similar, dsu, graphs	1500	x3009
177C1	Party dfs and similar, dsu, graphs	1500	x2997
165D	Beard Graph data structures, dsu, trees	2100	x1928
160D	Edges in MST dfs and similar, dsu, graphs, sortings	2300	x3350
141E	Clearing Up constructive algorithms, dp, dsu, graphs	2300	x1366
111C	Petya and Spiders bitmasks, dp, dsu	2100	x1582
109C	Lucky Tree dp, dsu, trees	1900	x4116
105D	Entertaining Geodetics brute force, dsu, implementation	2700	x145
103B	Cthulhu dfs and similar, dsu, graphs	1500	x10622
97E	Leaders dfs and similar, dsu, graphs, trees	2200	x429
95E	Lucky Country dp, dsu, graphs	2500	x1901
91C	Ski Base combinatorics, dsu, graphs	2300	x1011
87D	Beautiful Road dfs and similar, dp, dsu, graphs, implementation, sortings, trees	2300	x1055
85E	Guard Towers binary search, dsu, geometry, graphs, sortings	2600	x1102
81E	Pairs dfs and similar, dp, dsu, graphs, implementation, trees	2700	x399
77C	Beavermuncher-0xFF dfs and similar, dp, dsu, greedy, trees	2100	x1172
76A	Gift dsu, graphs, sortings, trees	2200	x2195
74C	Chessboard Billiard dfs and similar, dsu, graphs, number theory	2100	x1412
60D	Savior brute force, dsu, math	2500	x547
60B	Serial Time! dfs and similar, dsu	1400	x5306
46F	Hercule Poirot Problem dsu, graphs	2300	x358
45B	School dp, dsu	2200	x319
36E	Two Paths constructive algorithms, dsu, graphs, implementation	2600	x614

The only programming contests Web 2.0 platform

Server time: May/01/2026 19:15:04 (g2).

Desktop version, switch to mobile version.

Supported by