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Problem set. Graph Theory Problems
Solved problems:
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ID
Title
Source
Authors
Difficulty
1004
Sightseeing Trip
Central European Olympiad in Informatics 1999
2733
580
1008
Image Encoding
USTU PhysTech Cup 2000
4326
366
1016
Cube on the Walk
USU Local Contest. 1999
1910
825
1022
Genealogical Tree
Autumn School Contest 2000
11123
142
1033
Labyrinth
Ural Championship 1999
6646
237
1035
Cross-stitch
Ural Championship 1999
1142
1366
1040
Airline Company
USU Championship 2000
1546
1004
1045
Funny Game
USU Local Contest. March 2000
2943
523
1056
Centers of the Net
NEERC 2000 Central Subregional
2784
551
1065
Frontier
NEERC 2000
1018
1419
1069
Prufer Code
USU Personal Contest 2001
2754
513
1072
Routing
USU Personal Contest 2001
2805
503
1076
Trash
1968
712
1077
Travelling Tours
1280
396
1080
Map Coloring
Winter Mathematical Festival Varna 2001
7519
186
1085
Meeting
Spring School Contest 2001
2200
629
1096
Get the Right Route Plate!
USU Local Contest. March 2001
1851
710
1099
Work Scheduling
1039
1139
1106
Two Teams
Tetrahedron Team Online Contest May 2001
6883
74
1109
Conference
Bulgarian Online Contest September 2001
2036
249
1119
Metro
Autumn School Contest 2001
7286
70
1124
Mosaic
USU Championship 2001
1712
296
1128
Partition into Groups
USU Championship 2001
1229
412
1129
Door Painting
USU Championship 2001
1340
378
1136
Parliament
NEERC 2001 Central Subregional
5097
100
1137
Bus Routes
NEERC 2001 Central Subregional
1604
316
1145
Rope in the Labyrinth
DSAP Vietnam Online Contest November 2001
1475
344
1156
Two Rounds
Ural Championship 2001. Round 2
1590
320
1160
Network
NEERC 2001 Northern Subregional
3676
140
1162
Currency Exchange
NEERC 2001 Northern Subregional
2759
185
1176
Hyperchannels
USU Personal Contest 2002
1518
335
1182
Team Them Up!
NEERC 2001
1001
507
1198
Jobbery
1077
489
1199
Mouse
125
3619
1205
By the Underground or by Foot?
USU Local Contest. March 2002
2181
234
1208
Legendary Teams Contest
USU Local Contest. March 2002
2430
210
1210
Kind Spirits
Autumn School Contest 2002
3047
169
1218
Episode N-th: The Jedi Tournament
USU Championship 2002
1588
323
1227
Rally Championship
NEERC 2002 Central Subregional
1706
301
1237
Evacuation Plan
NEERC 2002
515
987
1242
Werewolf
USU Personal Contest 2003
2957
175
1250
Sea Burial
USU Local Contest. March 2003
708
723
1254
Die Hard
USU Local Contest. March 2003
793
647
1270
Unicube
USU Championship 2003
223
2244
1271
Sailing Directions
USU Championship 2003
112
4285
1272
Non-Yekaterinburg Subway
USU Championship 2003
3611
144
1277
Cops and Thieves
NEERC 2003 Central Subregional
597
862
1280
Topological Sorting
NEERC 2003 Central Subregional
3711
141
1281
River Basin
NEERC 2003 Central Subregional
283
1785
1291
Gear-wheels
Spring School Contest 2004
1362
383
1301
Cube in Labyrinth
Ural Championship 1998
718
721
1314
Chase in Subway
Ural Championship 2004. Round 1
924
563
1315
MDPAR and MIIAR
Ural Championship 2004. Round 1
287
1769
1320
Graph Decomposition
Ural Championship 2004. Round 2
1831
285
1323
Classmates
Ural Championship 2004. Round 2
624
829
1325
Dirt
Ural Championship 2004. Round 2
974
534
1329
Galactic History
Autumn School Contest 2004
1155
453
1337
Bureaucracy
Autumn School Contest 2004
336
1526
1338
Automobiles
USU Championship 2004
296
1731
1339
Babies
USU Championship 2004
611
853
1358
Cables
Spring School Contest 2005
971
540
1361
Spaceology vs. Chronistics
Ural Championship 2005. Round 2
274
1868
1367
Top Secret
Ural Championship 2005. Round 2
180
2792
1379
Cups Transportation
Ural Championship 2005. Round 1
902
583
1392
Dreaming of Stars
685
765
1399
Economical Director
48
8423
1400
Cellular Characters
Autumn School Contest 2005
956
551
1416
Confidential
USU Championship 2005
1366
385
1419
Maps of the Island Worlds
USU Championship 2005
429
1208
1421
Credit Operations
Timus Top Coders: First Challenge
953
540
1434
Buses in Vasyuki
USU Personal Contest 2006
584
873
1441
From the History of Gringotts Bank
Ural Championship 2006
445
1133
1447
Portkey Network
Ural Championship 2006
520
973
1449
Credit Operations 2
Timus Top Coders: Second Challenge
340
1465
1450
Russian Pipelines
Timus Top Coders: Second Challenge
3431
149
1479
Scheduled Checking
Petrozavodsk Summer 2006. Ural+Orel Contest
115
3984
1487
Chinese Football
USU Championship 2006
390
1242
1500
Pass Licenses
NEERC 2006 Eastern Subregional
762
641
1505
Oil Transfer
NEERC 2006 Eastern Subregional
166
2811
1527
Bad Roads
Petrozavodsk Winter 2007. D.Gozman Contest
418
1131
1533
Fat Hobbits
USU Personal Contest 2007
483
980
1544
Classmates 3
Ural Championship 2007
372
1253
1557
Network Attack
Petrozavodsk Summer 2007. NSU Contest
262
1708
1569
Networking the “Iset”
USU Championship 2007
513
886
1575
Yekaterinburg Subway 2
Autumn School Contest 2007
525
865
1580
Dean's Debts
Autumn School Contest 2007
515
881
1610
Cactuses
Ural Championship 2008
214
2000
1623
Fractal Labyrinth
Petrozavodsk Winter 2008. ITMO Contest
134
3027
1630
Talisman
USU Championship 2008
419
1005
1641
Duties
Autumn School Contest 2008
832
511
1643
Attack of the Dark Fortress
Autumn School Contest 2008
1000
426
1651
Shortest Subchain
NEERC 2008 Eastern Subregional
1230
346
1652
Banking Crisis
NEERC 2008 Eastern Subregional
153
2635
1664
Pipeline Transportation
Petrozavodsk Winter 2008. USU Contest
216
1883
1676
Mortal Kombat
Petrozavodsk Summer 2008. USU Contest
238
1708
1691
Algorithm Complexity
Petrozavodsk Winter 2009. USU Contest
139
2809
1699
Turning Turtles
Petrozavodsk Winter 2009. USU Contest
379
1076
1709
Penguin-Avia
Ural Championship 2009
2703
154
1721
Two Sides of the Same Coin
NEERC 2009 Eastern Subregional
681
581
1742
Team building
Petrozavodsk Summer 2009. Ufa SATU Contest
1252
312
1770
The Party of Ural Champions
Ural Championship 2010
214
1728
1806
Mobile Telegraphs
NEERC 2010 Eastern Subregional
2082
178
1833
Hopes of Rowing
Ural Championship 2011
166
2034
1837
Isenbaev's Number
Ural Championship 2011
5962
60
1847
Zamkadye
Petrozavodsk Summer 2010. USU Contest
81
3819
1882
Old Nokia
Ural Regional School Programming Contest 2011
123
2594
1888
Pilot Work Experience
NEERC 2011 Eastern Subregional
736
462
1905
Travel in Time
Ural Championship 2012
272
1133
1912
Titan Ruins: Passing through Walls
NEERC 2012 Eastern Subregional
242
1266
1930
Ivan's Car
Ural Regional School Programming Contest 2012
1953
162
1934
Black Spot
Ural FU Championship 2012
874
359
1966
Cycling Roads
Ural FU Personal Contest 2013
433
682
1980
Road to Investor
Ural Championship 2013
460
637
1982
Electrification Plan
Ural FU Championship 2013
2291
128
2013
Neither shaken nor stirred
NEERC 2014 Eastern Subregional
278
938
2017
Best of a bad lot
NEERC 2014 Eastern Subregional
193
1331
2030
Awesome Backup System
Ural Regional School Programming Contest 2014
512
516
2034
Caravans
Ural Regional School Programming Contest 2014
941
283
2038
Minimum Vertex Cover
Petrozavodsk Summer 2014. Ural FU Contest
104
2351
2055
Urban Geography
Ural Championship 2015
165
1469
2093
All Roads Lead to Snowdrift
Ural FU Personal Contest 2014
158
1367
2113
Survive the flood
University-Academy Olympiad 2019
384
430
2127
Determinant of a Graph
Petrozavodsk Summer 2018. umnik_team contest
42
3222
2128
Rubina's Solitaire
Later is better than never
154
995
2132
Graph Decomposition. Version 2
Later is better than never
109
1371
2140
BitMazeCraft
Ural School Programming Contest 2019
131
1123
2147
City Building
Ural School Programming Contest 2019
80
1760
2155
Quadrocopter
Ural School Programming Contest 2020
129
954
2159
Essay
Ural School Programming Contest 2021
54
1313
2169
City Building 2
Ural School Programming Contest 2022
38
1749
2174
Dualism of Numbers
Ural School Programming Contest 2023
53
894
2180
Need More Tasks
Ural School Programming Contest 2023
34
1280
2187
Need More Gold
Ural School Programming Contest 2024
31
1374
2192
My Grandfather
ICPC Ural Regional Contest Qualifier 2022
52
909
2195
Binary Trees
ICPC Ural Regional Contest Qualifier 2023
26
1566
2198
Deep Understanding
ICPC Ural Regional Contest Qualifier 2024
35
1251
2200
He is not a knight for you 2
University-Academy Olympiad 2020
25
1038
2219
Philosophical Question
ICPC Ural Regional Contest Qualifier 2025
33
843
2226
County of Squirrels
Ural Championship 2025
39
740
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