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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
2711
580
1008
Image Encoding
USTU PhysTech Cup 2000
4279
367
1016
Cube on the Walk
USU Local Contest. 1999
1898
823
1022
Genealogical Tree
Autumn School Contest 2000
11049
142
1033
Labyrinth
Ural Championship 1999
6594
237
1035
Cross-stitch
Ural Championship 1999
1129
1370
1040
Airline Company
USU Championship 2000
1539
1000
1045
Funny Game
USU Local Contest. March 2000
2927
521
1056
Centers of the Net
NEERC 2000 Central Subregional
2767
550
1065
Frontier
NEERC 2000
1013
1413
1069
Prufer Code
USU Personal Contest 2001
2712
516
1072
Routing
USU Personal Contest 2001
2790
502
1076
Trash
1956
711
1077
Travelling Tours
1270
395
1080
Map Coloring
Winter Mathematical Festival Varna 2001
7298
190
1085
Meeting
Spring School Contest 2001
2194
625
1096
Get the Right Route Plate!
USU Local Contest. March 2001
1842
707
1099
Work Scheduling
1026
1143
1106
Two Teams
Tetrahedron Team Online Contest May 2001
6814
74
1109
Conference
Bulgarian Online Contest September 2001
2015
250
1119
Metro
Autumn School Contest 2001
7222
70
1124
Mosaic
USU Championship 2001
1689
298
1128
Partition into Groups
USU Championship 2001
1217
413
1129
Door Painting
USU Championship 2001
1237
406
1136
Parliament
NEERC 2001 Central Subregional
5066
100
1137
Bus Routes
NEERC 2001 Central Subregional
1562
322
1145
Rope in the Labyrinth
DSAP Vietnam Online Contest November 2001
1424
353
1156
Two Rounds
Ural Championship 2001. Round 2
1543
326
1160
Network
NEERC 2001 Northern Subregional
3492
147
1162
Currency Exchange
NEERC 2001 Northern Subregional
2567
197
1176
Hyperchannels
USU Personal Contest 2002
1510
334
1182
Team Them Up!
NEERC 2001
988
510
1198
Jobbery
1074
487
1199
Mouse
114
3904
1205
By the Underground or by Foot?
USU Local Contest. March 2002
2153
235
1208
Legendary Teams Contest
USU Local Contest. March 2002
2372
214
1210
Kind Spirits
Autumn School Contest 2002
3003
170
1218
Episode N-th: The Jedi Tournament
USU Championship 2002
1579
323
1227
Rally Championship
NEERC 2002 Central Subregional
1692
301
1237
Evacuation Plan
NEERC 2002
511
986
1242
Werewolf
USU Personal Contest 2003
2909
176
1250
Sea Burial
USU Local Contest. March 2003
700
725
1254
Die Hard
USU Local Contest. March 2003
789
644
1270
Unicube
USU Championship 2003
217
2285
1271
Sailing Directions
USU Championship 2003
104
4549
1272
Non-Yekaterinburg Subway
USU Championship 2003
3508
147
1277
Cops and Thieves
NEERC 2003 Central Subregional
589
866
1280
Topological Sorting
NEERC 2003 Central Subregional
3661
141
1281
River Basin
NEERC 2003 Central Subregional
276
1814
1291
Gear-wheels
Spring School Contest 2004
1352
382
1301
Cube in Labyrinth
Ural Championship 1998
689
745
1314
Chase in Subway
Ural Championship 2004. Round 1
882
584
1315
MDPAR and MIIAR
Ural Championship 2004. Round 1
274
1835
1320
Graph Decomposition
Ural Championship 2004. Round 2
1809
287
1323
Classmates
Ural Championship 2004. Round 2
618
830
1325
Dirt
Ural Championship 2004. Round 2
965
535
1329
Galactic History
Autumn School Contest 2004
1138
456
1337
Bureaucracy
Autumn School Contest 2004
332
1532
1338
Automobiles
USU Championship 2004
291
1746
1339
Babies
USU Championship 2004
605
855
1358
Cables
Spring School Contest 2005
965
539
1361
Spaceology vs. Chronistics
Ural Championship 2005. Round 2
266
1907
1367
Top Secret
Ural Championship 2005. Round 2
166
2991
1379
Cups Transportation
Ural Championship 2005. Round 1
863
604
1392
Dreaming of Stars
681
764
1399
Economical Director
41
9490
1400
Cellular Characters
Autumn School Contest 2005
952
548
1416
Confidential
USU Championship 2005
1331
392
1419
Maps of the Island Worlds
USU Championship 2005
425
1210
1421
Credit Operations
Timus Top Coders: First Challenge
939
543
1434
Buses in Vasyuki
USU Personal Contest 2006
572
883
1441
From the History of Gringotts Bank
Ural Championship 2006
438
1141
1447
Portkey Network
Ural Championship 2006
513
978
1449
Credit Operations 2
Timus Top Coders: Second Challenge
333
1483
1450
Russian Pipelines
Timus Top Coders: Second Challenge
3326
152
1479
Scheduled Checking
Petrozavodsk Summer 2006. Ural+Orel Contest
107
4218
1487
Chinese Football
USU Championship 2006
382
1256
1500
Pass Licenses
NEERC 2006 Eastern Subregional
755
641
1505
Oil Transfer
NEERC 2006 Eastern Subregional
160
2884
1527
Bad Roads
Petrozavodsk Winter 2007. D.Gozman Contest
412
1136
1533
Fat Hobbits
USU Personal Contest 2007
479
978
1544
Classmates 3
Ural Championship 2007
368
1254
1557
Network Attack
Petrozavodsk Summer 2007. NSU Contest
249
1775
1569
Networking the “Iset”
USU Championship 2007
492
913
1575
Yekaterinburg Subway 2
Autumn School Contest 2007
522
861
1580
Dean's Debts
Autumn School Contest 2007
509
882
1610
Cactuses
Ural Championship 2008
209
2023
1623
Fractal Labyrinth
Petrozavodsk Winter 2008. ITMO Contest
128
3123
1630
Talisman
USU Championship 2008
416
1001
1641
Duties
Autumn School Contest 2008
829
507
1643
Attack of the Dark Fortress
Autumn School Contest 2008
990
425
1651
Shortest Subchain
NEERC 2008 Eastern Subregional
1220
345
1652
Banking Crisis
NEERC 2008 Eastern Subregional
147
2704
1664
Pipeline Transportation
Petrozavodsk Winter 2008. USU Contest
204
1964
1676
Mortal Kombat
Petrozavodsk Summer 2008. USU Contest
230
1744
1691
Algorithm Complexity
Petrozavodsk Winter 2009. USU Contest
126
3039
1699
Turning Turtles
Petrozavodsk Winter 2009. USU Contest
374
1076
1709
Penguin-Avia
Ural Championship 2009
2653
155
1721
Two Sides of the Same Coin
NEERC 2009 Eastern Subregional
675
578
1742
Team building
Petrozavodsk Summer 2009. Ufa SATU Contest
1243
310
1770
The Party of Ural Champions
Ural Championship 2010
209
1743
1806
Mobile Telegraphs
NEERC 2010 Eastern Subregional
1907
191
1833
Hopes of Rowing
Ural Championship 2011
164
2024
1837
Isenbaev's Number
Ural Championship 2011
5895
60
1847
Zamkadye
Petrozavodsk Summer 2010. USU Contest
73
4117
1882
Old Nokia
Ural Regional School Programming Contest 2011
115
2714
1888
Pilot Work Experience
NEERC 2011 Eastern Subregional
730
458
1905
Travel in Time
Ural Championship 2012
267
1132
1912
Titan Ruins: Passing through Walls
NEERC 2012 Eastern Subregional
237
1267
1930
Ivan's Car
Ural Regional School Programming Contest 2012
1883
165
1934
Black Spot
Ural FU Championship 2012
864
356
1966
Cycling Roads
Ural FU Personal Contest 2013
429
674
1980
Road to Investor
Ural Championship 2013
453
633
1982
Electrification Plan
Ural FU Championship 2013
2149
133
2013
Neither shaken nor stirred
NEERC 2014 Eastern Subregional
270
942
2017
Best of a bad lot
NEERC 2014 Eastern Subregional
184
1360
2030
Awesome Backup System
Ural Regional School Programming Contest 2014
502
513
2034
Caravans
Ural Regional School Programming Contest 2014
912
285
2038
Minimum Vertex Cover
Petrozavodsk Summer 2014. Ural FU Contest
98
2421
2055
Urban Geography
Ural Championship 2015
159
1482
2093
All Roads Lead to Snowdrift
Ural FU Personal Contest 2014
152
1376
2113
Survive the flood
University-Academy Olympiad 2019
372
425
2127
Determinant of a Graph
Petrozavodsk Summer 2018. umnik_team contest
34
3640
2128
Rubina's Solitaire
Later is better than never
147
992
2132
Graph Decomposition. Version 2
Later is better than never
92
1527
2140
BitMazeCraft
Ural School Programming Contest 2019
121
1152
2147
City Building
Ural School Programming Contest 2019
70
1886
2155
Quadrocopter
Ural School Programming Contest 2020
117
983
2159
Essay
Ural School Programming Contest 2021
44
1406
2169
City Building 2
Ural School Programming Contest 2022
29
1944
2174
Dualism of Numbers
Ural School Programming Contest 2023
42
922
2180
Need More Tasks
Ural School Programming Contest 2023
20
1598
2187
Need More Gold
Ural School Programming Contest 2024
17
1775
2192
My Grandfather
ICPC Ural Regional Contest Qualifier 2022
37
1021
2195
Binary Trees
ICPC Ural Regional Contest Qualifier 2023
13
2086
2198
Deep Understanding
ICPC Ural Regional Contest Qualifier 2024
25
1368
2200
He is not a knight for you 2
University-Academy Olympiad 2020
5
1850
2219
Philosophical Question
ICPC Ural Regional Contest Qualifier 2025
6
1731
2226
County of Squirrels
Ural Championship 2025
7
1631
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