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Solved problems:
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ID
Title
Source
Authors
Difficulty
1003
Parity
Central European Olympiad in Informatics 1999
4062
386
1019
Line Painting
USU Local Contest. 1999
3365
464
1028
Stars
Ural Championship 1999
5892
264
1037
Memory Management
USU Championship 2000
1300
1178
1067
Disk Tree
NEERC 2000
3950
363
1090
In the Army Now
USU Local Contest. March 2001
3559
365
1097
Square Country 2
USU Local Contest. March 2001
945
1365
1100
Final Standings
Tetrahedron Team Online Contest May 2001
11322
44
1126
Magnetic Storms
USU Championship 2001
5464
92
1147
Shaping Regions
DSAP Vietnam Online Contest November 2001
676
736
1220
Stacks
USU Championship 2002
1824
278
1251
Cemetery Manager
USU Local Contest. March 2003
331
1505
1306
Sequence Median
Ural Championship 1998
3564
145
1316
Electronic Auction
Ural Championship 2004. Round 1
1180
436
1350
Canteen
Spring School Contest 2005
1336
389
1369
Cockroach Race
Ural Championship 2005. Round 2
33
12197
1414
Astronomical Database
USU Championship 2005
1210
430
1424
Minibus
Timus Top Coders: First Challenge
716
708
1439
Battle with You-Know-Who
Ural Championship 2006
1178
429
1470
UFOs
Petrozavodsk Summer 2006. Ural+Orel Contest
1936
253
1471
Distance in the Tree
Petrozavodsk Summer 2006. Ural+Orel Contest
2977
165
1494
Monobilliards
Autumn School Contest 2006
5244
93
1521
War Games 2
Timus Top Coders: Third Challenge
3816
126
1523
K-inversions
Petrozavodsk Winter 2007. D.Gozman Contest
1599
297
1542
Autocompletion
Ural Championship 2007
739
630
1553
Caves and Tunnels
Petrozavodsk Summer 2007. NSU Contest
1596
285
1560
Elementary Symmetric Functions
Petrozavodsk Summer 2007. NSU Contest
480
934
1613
For Fans of Statistics
Ural Championship 2008
3107
141
1628
White Streaks
USU Championship 2008
2511
168
1650
Billionaires
NEERC 2008 Eastern Subregional
2275
185
1654
Cipher Message
NEERC 2008 Eastern Subregional
7077
60
1671
Anansi's Cobweb
Petrozavodsk Summer 2008. USU Contest
3809
109
1682
Crazy Professor
USU Personal Contest 2009
756
538
1701
Ostap and Partners
Ural Championship 2009
627
643
1707
Hypnotoad's Secret
Ural Championship 2009
204
1913
1717
Eligibility Rules
NEERC 2009 Eastern Subregional
167
2225
1752
Tree 2
Petrozavodsk Summer 2009. Ufa SATU Contest
1490
257
1772
Ski-Trails for Robots
Ural Championship 2010
507
734
1841
Cableways
Petrozavodsk Summer 2010. USU Contest
146
2174
1846
GCD 2010
Petrozavodsk Summer 2010. USU Contest
2201
153
1855
Trade Guilds of Erathia
Petrozavodsk Summer 2011. Ural SU Team.GOV Contest
250
1303
1890
Money out of Thin Air
NEERC 2011 Eastern Subregional
721
460
1896
War Games 2.1
248
870
1977
Energy Wall
Ural Championship 2013
108
2460
1987
Nested Segments
Ural FU Championship 2013
1697
167
2014
Zhenya moves from parents
NEERC 2014 Eastern Subregional
471
542
2042
Nikita
Petrozavodsk Summer 2014. Ural FU Dandelion Contest
58
3803
2062
Ambitious Experiment
Ural Regional School Programming Contest 2015
811
288
2075
Take care of your eyebrows!
Qualification of Eastern Subregional 2015
71
2824
2096
All Inclusive
Ural FU Personal Contest 2014
67
2856
2114
My craft
University academic school olympiad in informatics 2019
148
1006
2119
Tree Hull
Petrozavodsk Summer 2018. umnik_team Contest
184
809
2124
Algebra on Segment
Petrozavodsk Summer 2018. umnik_team Contest
105
1365
2162
Graphmania
Ural School Programming Contest 2021
54
1129
2170
Experiment with Juice 2
Ural School Programming Contest 2022
35
1605
2178
Vadim and Sudoku: Renban
Ural School Programming Contest 2023
9
2329
2199
Company Question
ICPC Ural Regional Contest Qualifier 2024
21
1429
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