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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
2716
579
1008
Image Encoding
USTU PhysTech Cup 2000
4281
367
1016
Cube on the Walk
USU Local Contest. 1999
1901
822
1022
Genealogical Tree
Autumn School Contest 2000
11052
142
1033
Labyrinth
Ural Championship 1999
6599
237
1035
Cross-stitch
Ural Championship 1999
1131
1369
1040
Airline Company
USU Championship 2000
1540
1000
1045
Funny Game
USU Local Contest. March 2000
2934
521
1056
Centers of the Net
NEERC 2000 Central Subregional
2769
550
1065
Frontier
NEERC 2000
1014
1413
1069
Prufer Code
USU Personal Contest 2001
2723
515
1072
Routing
USU Personal Contest 2001
2793
502
1076
Trash
1959
710
1077
Travelling Tours
1271
395
1080
Map Coloring
Winter Mathematical Festival Varna 2001
7337
189
1085
Meeting
Spring School Contest 2001
2195
625
1096
Get the Right Route Plate!
USU Local Contest. March 2001
1846
706
1099
Work Scheduling
1029
1141
1106
Two Teams
Tetrahedron Team Online Contest May 2001
6828
74
1109
Conference
Bulgarian Online Contest September 2001
2015
250
1119
Metro
Autumn School Contest 2001
7226
70
1124
Mosaic
USU Championship 2001
1693
298
1128
Partition into Groups
USU Championship 2001
1219
412
1129
Door Painting
USU Championship 2001
1237
406
1136
Parliament
NEERC 2001 Central Subregional
5069
100
1137
Bus Routes
NEERC 2001 Central Subregional
1562
322
1145
Rope in the Labyrinth
DSAP Vietnam Online Contest November 2001
1443
349
1156
Two Rounds
Ural Championship 2001. Round 2
1547
326
1160
Network
NEERC 2001 Northern Subregional
3502
146
1162
Currency Exchange
NEERC 2001 Northern Subregional
2578
196
1176
Hyperchannels
USU Personal Contest 2002
1511
334
1182
Team Them Up!
NEERC 2001
993
508
1198
Jobbery
1074
487
1199
Mouse
115
3877
1205
By the Underground or by Foot?
USU Local Contest. March 2002
2156
235
1208
Legendary Teams Contest
USU Local Contest. March 2002
2374
214
1210
Kind Spirits
Autumn School Contest 2002
3003
170
1218
Episode N-th: The Jedi Tournament
USU Championship 2002
1581
322
1227
Rally Championship
NEERC 2002 Central Subregional
1693
301
1237
Evacuation Plan
NEERC 2002
513
983
1242
Werewolf
USU Personal Contest 2003
2938
175
1250
Sea Burial
USU Local Contest. March 2003
702
724
1254
Die Hard
USU Local Contest. March 2003
789
645
1270
Unicube
USU Championship 2003
218
2277
1271
Sailing Directions
USU Championship 2003
105
4514
1272
Non-Yekaterinburg Subway
USU Championship 2003
3513
147
1277
Cops and Thieves
NEERC 2003 Central Subregional
589
867
1280
Topological Sorting
NEERC 2003 Central Subregional
3661
141
1281
River Basin
NEERC 2003 Central Subregional
277
1809
1291
Gear-wheels
Spring School Contest 2004
1354
382
1301
Cube in Labyrinth
Ural Championship 1998
690
745
1314
Chase in Subway
Ural Championship 2004. Round 1
884
584
1315
MDPAR and MIIAR
Ural Championship 2004. Round 1
275
1831
1320
Graph Decomposition
Ural Championship 2004. Round 2
1809
287
1323
Classmates
Ural Championship 2004. Round 2
619
830
1325
Dirt
Ural Championship 2004. Round 2
967
534
1329
Galactic History
Autumn School Contest 2004
1139
456
1337
Bureaucracy
Autumn School Contest 2004
333
1529
1338
Automobiles
USU Championship 2004
292
1742
1339
Babies
USU Championship 2004
605
855
1358
Cables
Spring School Contest 2005
966
539
1361
Spaceology vs. Chronistics
Ural Championship 2005. Round 2
269
1888
1367
Top Secret
Ural Championship 2005. Round 2
167
2976
1379
Cups Transportation
Ural Championship 2005. Round 1
866
603
1392
Dreaming of Stars
682
763
1399
Economical Director
42
9318
1400
Cellular Characters
Autumn School Contest 2005
952
549
1416
Confidential
USU Championship 2005
1333
392
1419
Maps of the Island Worlds
USU Championship 2005
425
1211
1421
Credit Operations
Timus Top Coders: First Challenge
942
542
1434
Buses in Vasyuki
USU Personal Contest 2006
574
881
1441
From the History of Gringotts Bank
Ural Championship 2006
439
1140
1447
Portkey Network
Ural Championship 2006
514
977
1449
Credit Operations 2
Timus Top Coders: Second Challenge
334
1480
1450
Russian Pipelines
Timus Top Coders: Second Challenge
3335
152
1479
Scheduled Checking
Petrozavodsk Summer 2006. Ural+Orel Contest
109
4151
1487
Chinese Football
USU Championship 2006
384
1251
1500
Pass Licenses
NEERC 2006 Eastern Subregional
756
641
1505
Oil Transfer
NEERC 2006 Eastern Subregional
161
2870
1527
Bad Roads
Petrozavodsk Winter 2007. D.Gozman Contest
412
1138
1533
Fat Hobbits
USU Personal Contest 2007
480
977
1544
Classmates 3
Ural Championship 2007
368
1255
1557
Network Attack
Petrozavodsk Summer 2007. NSU Contest
251
1764
1569
Networking the “Iset”
USU Championship 2007
492
915
1575
Yekaterinburg Subway 2
Autumn School Contest 2007
522
862
1580
Dean's Debts
Autumn School Contest 2007
510
882
1610
Cactuses
Ural Championship 2008
211
2007
1623
Fractal Labyrinth
Petrozavodsk Winter 2008. ITMO Contest
129
3104
1630
Talisman
USU Championship 2008
416
1002
1641
Duties
Autumn School Contest 2008
832
506
1643
Attack of the Dark Fortress
Autumn School Contest 2008
992
425
1651
Shortest Subchain
NEERC 2008 Eastern Subregional
1222
345
1652
Banking Crisis
NEERC 2008 Eastern Subregional
149
2673
1664
Pipeline Transportation
Petrozavodsk Winter 2008. USU Contest
205
1958
1676
Mortal Kombat
Petrozavodsk Summer 2008. USU Contest
233
1725
1691
Algorithm Complexity
Petrozavodsk Winter 2009. USU Contest
129
2978
1699
Turning Turtles
Petrozavodsk Winter 2009. USU Contest
375
1075
1709
Penguin-Avia
Ural Championship 2009
2659
154
1721
Two Sides of the Same Coin
NEERC 2009 Eastern Subregional
679
576
1742
Team building
Petrozavodsk Summer 2009. Ufa SATU Contest
1245
310
1770
The Party of Ural Champions
Ural Championship 2010
210
1738
1806
Mobile Telegraphs
NEERC 2010 Eastern Subregional
1915
190
1833
Hopes of Rowing
Ural Championship 2011
165
2016
1837
Isenbaev's Number
Ural Championship 2011
5907
60
1847
Zamkadye
Petrozavodsk Summer 2010. USU Contest
74
4076
1882
Old Nokia
Ural Regional School Programming Contest 2011
116
2698
1888
Pilot Work Experience
NEERC 2011 Eastern Subregional
730
459
1905
Travel in Time
Ural Championship 2012
268
1130
1912
Titan Ruins: Passing through Walls
NEERC 2012 Eastern Subregional
237
1270
1930
Ivan's Car
Ural Regional School Programming Contest 2012
1891
165
1934
Black Spot
Ural FU Championship 2012
867
356
1966
Cycling Roads
Ural FU Personal Contest 2013
429
676
1980
Road to Investor
Ural Championship 2013
454
633
1982
Electrification Plan
Ural FU Championship 2013
2167
133
2013
Neither shaken nor stirred
NEERC 2014 Eastern Subregional
271
941
2017
Best of a bad lot
NEERC 2014 Eastern Subregional
187
1343
2030
Awesome Backup System
Ural Regional School Programming Contest 2014
506
511
2034
Caravans
Ural Regional School Programming Contest 2014
913
286
2038
Minimum Vertex Cover
Petrozavodsk Summer 2014. Ural FU Contest
100
2384
2055
Urban Geography
Ural Championship 2015
161
1469
2093
All Roads Lead to Snowdrift
Ural FU Personal Contest 2014
154
1364
2113
Survive the flood
University-Academy Olympiad 2019
376
422
2127
Determinant of a Graph
Petrozavodsk Summer 2018. umnik_team contest
37
3426
2128
Rubina's Solitaire
Later is better than never
149
985
2132
Graph Decomposition. Version 2
Later is better than never
95
1492
2140
BitMazeCraft
Ural School Programming Contest 2019
122
1150
2147
City Building
Ural School Programming Contest 2019
72
1851
2155
Quadrocopter
Ural School Programming Contest 2020
119
975
2159
Essay
Ural School Programming Contest 2021
48
1325
2169
City Building 2
Ural School Programming Contest 2022
33
1786
2174
Dualism of Numbers
Ural School Programming Contest 2023
45
890
2180
Need More Tasks
Ural School Programming Contest 2023
23
1483
2187
Need More Gold
Ural School Programming Contest 2024
20
1631
2192
My Grandfather
ICPC Ural Regional Contest Qualifier 2022
40
980
2195
Binary Trees
ICPC Ural Regional Contest Qualifier 2023
16
1884
2198
Deep Understanding
ICPC Ural Regional Contest Qualifier 2024
27
1321
2200
He is not a knight for you 2
University-Academy Olympiad 2020
10
1438
2219
Philosophical Question
ICPC Ural Regional Contest Qualifier 2025
16
1104
2226
County of Squirrels
Ural Championship 2025
17
1064
Solved problems:
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