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Solved problems:
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ID
Title
Source
Authors
Difficulty
1003
Parity
Central European Olympiad in Informatics 1999
4016
385
1019
Line Painting
USU Local Contest. 1999
3339
461
1028
Stars
Ural Championship 1999
5812
264
1037
Memory Management
USU Championship 2000
1286
1175
1067
Disk Tree
NEERC 2000
3860
367
1090
In the Army Now
USU Local Contest. March 2001
3537
363
1097
Square Country 2
USU Local Contest. March 2001
939
1356
1100
Final Standings
Tetrahedron Team Online Contest May 2001
11226
44
1126
Magnetic Storms
USU Championship 2001
5415
92
1147
Shaping Regions
DSAP Vietnam Online Contest November 2001
663
740
1220
Stacks
USU Championship 2002
1812
277
1251
Cemetery Manager
USU Local Contest. March 2003
328
1499
1306
Sequence Median
Ural Championship 1998
3528
145
1316
Electronic Auction
Ural Championship 2004. Round 1
1167
436
1350
Canteen
Spring School Contest 2005
1305
394
1369
Cockroach Race
Ural Championship 2005. Round 2
31
12640
1414
Astronomical Database
USU Championship 2005
1190
432
1424
Minibus
Timus Top Coders: First Challenge
701
713
1439
Battle with You-Know-Who
Ural Championship 2006
1144
436
1470
UFOs
Petrozavodsk Summer 2006. Ural+Orel Contest
1921
251
1471
Distance in the Tree
Petrozavodsk Summer 2006. Ural+Orel Contest
2937
165
1494
Monobilliards
Autumn School Contest 2006
5061
95
1521
War Games 2
Timus Top Coders: Third Challenge
3626
131
1523
K-inversions
Petrozavodsk Winter 2007. D.Gozman Contest
1583
295
1542
Autocompletion
Ural Championship 2007
726
632
1553
Caves and Tunnels
Petrozavodsk Summer 2007. NSU Contest
1563
286
1560
Elementary Symmetric Functions
Petrozavodsk Summer 2007. NSU Contest
475
929
1613
For Fans of Statistics
Ural Championship 2008
3082
140
1628
White Streaks
USU Championship 2008
2459
169
1650
Billionaires
NEERC 2008 Eastern Subregional
2145
192
1654
Cipher Message
NEERC 2008 Eastern Subregional
7017
59
1671
Anansi's Cobweb
Petrozavodsk Summer 2008. USU Contest
3635
112
1682
Crazy Professor
USU Personal Contest 2009
745
536
1701
Ostap and Partners
Ural Championship 2009
621
636
1707
Hypnotoad's Secret
Ural Championship 2009
202
1894
1717
Eligibility Rules
NEERC 2009 Eastern Subregional
165
2205
1752
Tree 2
Petrozavodsk Summer 2009. Ufa SATU Contest
1471
255
1772
Ski-Trails for Robots
Ural Championship 2010
500
728
1841
Cableways
Petrozavodsk Summer 2010. USU Contest
144
2146
1855
Trade Guilds of Erathia
Petrozavodsk Summer 2011. Ural SU Team.GOV Contest
245
1294
1890
Money out of Thin Air
NEERC 2011 Eastern Subregional
705
458
1896
War Games 2.1
228
900
1977
Energy Wall
Ural Championship 2013
106
2422
1987
Nested Segments
Ural FU Championship 2013
1677
163
2014
Zhenya moves from parents
NEERC 2014 Eastern Subregional
458
537
2042
Nikita
Petrozavodsk Summer 2014. Ural FU Dandelion Contest
57
3714
2062
Ambitious Experiment
Ural Regional School Programming Contest 2015
796
281
2075
Take care of your eyebrows!
Qualification of Eastern Subregional 2015
70
2732
2096
All Inclusive
Ural FU Personal Contest 2014
64
2833
2114
My craft
University academic school olympiad in informatics 2019
143
967
2119
Tree Hull
Petrozavodsk Summer 2018. umnik_team Contest
174
793
2124
Algebra on Segment
Petrozavodsk Summer 2018. umnik_team Contest
98
1350
2162
Graphmania
Ural School Programming Contest 2021
43
1133
2170
Experiment with Juice 2
Ural School Programming Contest 2022
27
1623
2178
Vadim and Sudoku: Renban
Ural School Programming Contest 2023
5
2112
2199
Company Question
ICPC Ural Regional Contest Qualifier 2024
9
1670
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