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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
2739
580
1008
Image Encoding
USTU PhysTech Cup 2000
4329
367
1016
Cube on the Walk
USU Local Contest. 1999
1913
825
1022
Genealogical Tree
Autumn School Contest 2000
11141
142
1033
Labyrinth
Ural Championship 1999
6660
237
1035
Cross-stitch
Ural Championship 1999
1143
1368
1040
Airline Company
USU Championship 2000
1548
1005
1045
Funny Game
USU Local Contest. March 2000
2947
524
1056
Centers of the Net
NEERC 2000 Central Subregional
2787
552
1065
Frontier
NEERC 2000
1019
1420
1069
Prufer Code
USU Personal Contest 2001
2756
514
1072
Routing
USU Personal Contest 2001
2807
504
1076
Trash
1970
713
1077
Travelling Tours
1281
396
1080
Map Coloring
Winter Mathematical Festival Varna 2001
7538
186
1085
Meeting
Spring School Contest 2001
2203
629
1096
Get the Right Route Plate!
USU Local Contest. March 2001
1853
710
1099
Work Scheduling
1043
1137
1106
Two Teams
Tetrahedron Team Online Contest May 2001
6896
74
1109
Conference
Bulgarian Online Contest September 2001
2043
249
1119
Metro
Autumn School Contest 2001
7300
70
1124
Mosaic
USU Championship 2001
1714
297
1128
Partition into Groups
USU Championship 2001
1232
412
1129
Door Painting
USU Championship 2001
1343
378
1136
Parliament
NEERC 2001 Central Subregional
5105
100
1137
Bus Routes
NEERC 2001 Central Subregional
1609
316
1145
Rope in the Labyrinth
DSAP Vietnam Online Contest November 2001
1481
343
1156
Two Rounds
Ural Championship 2001. Round 2
1594
319
1160
Network
NEERC 2001 Northern Subregional
3687
140
1162
Currency Exchange
NEERC 2001 Northern Subregional
2765
185
1176
Hyperchannels
USU Personal Contest 2002
1522
335
1182
Team Them Up!
NEERC 2001
1003
507
1198
Jobbery
1081
488
1199
Mouse
127
3575
1205
By the Underground or by Foot?
USU Local Contest. March 2002
2187
234
1208
Legendary Teams Contest
USU Local Contest. March 2002
2433
210
1210
Kind Spirits
Autumn School Contest 2002
3053
169
1218
Episode N-th: The Jedi Tournament
USU Championship 2002
1593
323
1227
Rally Championship
NEERC 2002 Central Subregional
1708
302
1237
Evacuation Plan
NEERC 2002
517
985
1242
Werewolf
USU Personal Contest 2003
2969
175
1250
Sea Burial
USU Local Contest. March 2003
709
724
1254
Die Hard
USU Local Contest. March 2003
795
646
1270
Unicube
USU Championship 2003
224
2239
1271
Sailing Directions
USU Championship 2003
113
4260
1272
Non-Yekaterinburg Subway
USU Championship 2003
3621
144
1277
Cops and Thieves
NEERC 2003 Central Subregional
599
861
1280
Topological Sorting
NEERC 2003 Central Subregional
3722
140
1281
River Basin
NEERC 2003 Central Subregional
286
1771
1291
Gear-wheels
Spring School Contest 2004
1363
383
1301
Cube in Labyrinth
Ural Championship 1998
721
720
1314
Chase in Subway
Ural Championship 2004. Round 1
928
561
1315
MDPAR and MIIAR
Ural Championship 2004. Round 1
289
1761
1320
Graph Decomposition
Ural Championship 2004. Round 2
1854
283
1323
Classmates
Ural Championship 2004. Round 2
625
829
1325
Dirt
Ural Championship 2004. Round 2
977
534
1329
Galactic History
Autumn School Contest 2004
1158
453
1337
Bureaucracy
Autumn School Contest 2004
337
1525
1338
Automobiles
USU Championship 2004
299
1718
1339
Babies
USU Championship 2004
613
852
1358
Cables
Spring School Contest 2005
974
540
1361
Spaceology vs. Chronistics
Ural Championship 2005. Round 2
276
1859
1367
Top Secret
Ural Championship 2005. Round 2
181
2783
1379
Cups Transportation
Ural Championship 2005. Round 1
907
581
1392
Dreaming of Stars
688
764
1399
Economical Director
49
8301
1400
Cellular Characters
Autumn School Contest 2005
960
549
1416
Confidential
USU Championship 2005
1369
385
1419
Maps of the Island Worlds
USU Championship 2005
430
1208
1421
Credit Operations
Timus Top Coders: First Challenge
957
539
1434
Buses in Vasyuki
USU Personal Contest 2006
586
872
1441
From the History of Gringotts Bank
Ural Championship 2006
446
1133
1447
Portkey Network
Ural Championship 2006
522
971
1449
Credit Operations 2
Timus Top Coders: Second Challenge
341
1465
1450
Russian Pipelines
Timus Top Coders: Second Challenge
3446
149
1479
Scheduled Checking
Petrozavodsk Summer 2006. Ural+Orel Contest
117
3930
1487
Chinese Football
USU Championship 2006
391
1242
1500
Pass Licenses
NEERC 2006 Eastern Subregional
763
642
1505
Oil Transfer
NEERC 2006 Eastern Subregional
167
2802
1527
Bad Roads
Petrozavodsk Winter 2007. D.Gozman Contest
419
1131
1533
Fat Hobbits
USU Personal Contest 2007
485
978
1544
Classmates 3
Ural Championship 2007
373
1252
1557
Network Attack
Petrozavodsk Summer 2007. NSU Contest
264
1700
1569
Networking the “Iset”
USU Championship 2007
515
885
1575
Yekaterinburg Subway 2
Autumn School Contest 2007
529
861
1580
Dean's Debts
Autumn School Contest 2007
518
879
1610
Cactuses
Ural Championship 2008
216
1988
1623
Fractal Labyrinth
Petrozavodsk Winter 2008. ITMO Contest
135
3016
1630
Talisman
USU Championship 2008
421
1004
1641
Duties
Autumn School Contest 2008
834
511
1643
Attack of the Dark Fortress
Autumn School Contest 2008
1004
426
1651
Shortest Subchain
NEERC 2008 Eastern Subregional
1235
346
1652
Banking Crisis
NEERC 2008 Eastern Subregional
155
2611
1664
Pipeline Transportation
Petrozavodsk Winter 2008. USU Contest
219
1864
1676
Mortal Kombat
Petrozavodsk Summer 2008. USU Contest
239
1707
1691
Algorithm Complexity
Petrozavodsk Winter 2009. USU Contest
140
2799
1699
Turning Turtles
Petrozavodsk Winter 2009. USU Contest
381
1074
1709
Penguin-Avia
Ural Championship 2009
2714
154
1721
Two Sides of the Same Coin
NEERC 2009 Eastern Subregional
683
581
1742
Team building
Petrozavodsk Summer 2009. Ufa SATU Contest
1255
312
1770
The Party of Ural Champions
Ural Championship 2010
217
1712
1806
Mobile Telegraphs
NEERC 2010 Eastern Subregional
2089
178
1833
Hopes of Rowing
Ural Championship 2011
169
2008
1837
Isenbaev's Number
Ural Championship 2011
5974
60
1847
Zamkadye
Petrozavodsk Summer 2010. USU Contest
82
3794
1882
Old Nokia
Ural Regional School Programming Contest 2011
124
2586
1888
Pilot Work Experience
NEERC 2011 Eastern Subregional
737
463
1905
Travel in Time
Ural Championship 2012
273
1135
1912
Titan Ruins: Passing through Walls
NEERC 2012 Eastern Subregional
243
1267
1930
Ivan's Car
Ural Regional School Programming Contest 2012
1964
162
1934
Black Spot
Ural FU Championship 2012
878
359
1966
Cycling Roads
Ural FU Personal Contest 2013
435
683
1980
Road to Investor
Ural Championship 2013
461
639
1982
Electrification Plan
Ural FU Championship 2013
2298
128
2013
Neither shaken nor stirred
NEERC 2014 Eastern Subregional
280
938
2017
Best of a bad lot
NEERC 2014 Eastern Subregional
194
1333
2030
Awesome Backup System
Ural Regional School Programming Contest 2014
514
517
2034
Caravans
Ural Regional School Programming Contest 2014
949
283
2038
Minimum Vertex Cover
Petrozavodsk Summer 2014. Ural FU Contest
108
2286
2055
Urban Geography
Ural Championship 2015
166
1470
2093
All Roads Lead to Snowdrift
Ural FU Personal Contest 2014
159
1370
2113
Survive the flood
University-Academy Olympiad 2019
387
432
2127
Determinant of a Graph
Petrozavodsk Summer 2018. umnik_team contest
45
3082
2128
Rubina's Solitaire
Later is better than never
156
995
2132
Graph Decomposition. Version 2
Later is better than never
110
1376
2140
BitMazeCraft
Ural School Programming Contest 2019
132
1129
2147
City Building
Ural School Programming Contest 2019
81
1762
2155
Quadrocopter
Ural School Programming Contest 2020
131
955
2159
Essay
Ural School Programming Contest 2021
56
1306
2169
City Building 2
Ural School Programming Contest 2022
39
1757
2174
Dualism of Numbers
Ural School Programming Contest 2023
56
887
2180
Need More Tasks
Ural School Programming Contest 2023
35
1301
2187
Need More Gold
Ural School Programming Contest 2024
33
1361
2192
My Grandfather
ICPC Ural Regional Contest Qualifier 2022
53
930
2195
Binary Trees
ICPC Ural Regional Contest Qualifier 2023
28
1542
2198
Deep Understanding
ICPC Ural Regional Contest Qualifier 2024
37
1245
2200
He is not a knight for you 2
University-Academy Olympiad 2020
29
989
2219
Philosophical Question
ICPC Ural Regional Contest Qualifier 2025
36
838
2226
County of Squirrels
Ural Championship 2025
42
741
Solved problems:
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