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Problem set. Hardest Problems
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ID
Title
Source
Authors
Difficulty
1058
Chocolate
NEERC 2000 Central Subregional
549
2739
1074
Very Short Problem
USU Personal Contest 2001
660
2107
1148
Building Towers
DSAP Vietnam Online Contest November 2001
285
1726
1166
Funny Card Game
NEERC 2001 Northern Subregional
141
3449
1171
Lost in Space
Romanian Online Contest December 2001
398
1249
1177
Like Comparisons
USU Personal Contest 2002
400
1245
1199
Mouse
121
3714
1216
Two Pawns and One King
USU Championship 2002
245
2019
1239
Ghost Busters
NEERC 2002
160
3033
1271
Sailing Directions
USU Championship 2003
108
4415
1312
Tray
Ural Championship 2004. Round 1
168
2941
1344
Gigantic Turnip
USU Championship 2004
115
4223
1369
Cockroach Race
Ural Championship 2005. Round 2
37
11247
1374
Misere
Ural Championship 2005. Round 1
47
9297
1376
Dean's Pyramid 2
Ural Championship 2005. Round 1
34
12044
1383
Flower-garden Designs
Petrozavodsk Summer 2005. MSU+USU Contest
52
8548
1384
Goat in the Garden 4
Petrozavodsk Summer 2005. MSU+USU Contest
108
4491
1388
Photo
Petrozavodsk Summer 2005. MSU+USU Contest
33
12325
1390
Shots at Walls
Petrozavodsk Summer 2005. MSU+USU Contest
53
8412
1391
Snake
Petrozavodsk Summer 2005. MSU+USU Contest
91
5247
1394
Ships. Version 2
8
29445
1395
Pascal vs. C++. Version 2
217
2248
1399
Economical Director
44
9009
1415
Mobile Life
USU Championship 2005
53
8387
1432
Twofold Luck
USU Personal Contest 2006
62
7174
1438
Time Limit Exceeded
USU Personal Contest 2006
165
2951
1460
Wires
Petrozavodsk Winter 2006. USU Contest
115
4001
1464
Light
Petrozavodsk Winter 2006. USU Contest
168
2809
1478
Spy Satellites
Petrozavodsk Summer 2006. Ural+Orel Contest
115
3968
1479
Scheduled Checking
Petrozavodsk Summer 2006. Ural+Orel Contest
110
4133
1524
Men in Black
Petrozavodsk Winter 2007. D.Gozman Contest
35
10713
1536
Delights of Pipe-weed
USU Personal Contest 2007
51
7884
1548
Sakura and Statistics
Ural Championship 2007
28
12537
1555
Find the Treasure!
Petrozavodsk Summer 2007. NSU Contest
51
7581
1556
Multishot in the Secret Cow Level
Petrozavodsk Summer 2007. NSU Contest
46
8258
1589
Sokoban
NEERC 2007 Eastern Subregional
9
24174
1594
Aztec Treasure
88
4182
1596
Knight Mare
31
8106
1618
Arrays Printing
Petrozavodsk Winter 2008. ITMO Contest
94
4170
1621
Definite Integral
Petrozavodsk Winter 2008. ITMO Contest
91
4294
1624
Go out of here!
Petrozavodsk Winter 2008. ITMO Contest
78
4928
1626
Interfering Segment
Petrozavodsk Winter 2008. ITMO Contest
52
6995
1649
Abstractionism to the People
NEERC 2008 Eastern Subregional
55
6573
1653
Death Conveyor
NEERC 2008 Eastern Subregional
63
5853
1660
The Island of Bad Luck
Petrozavodsk Winter 2008. USU Contest
60
6045
1661
Dodecahedron
Petrozavodsk Winter 2008. USU Contest
107
3617
1662
Goat in the Garden 6
Petrozavodsk Winter 2008. USU Contest
84
4502
1668
Death Star 2
Petrozavodsk Winter 2008. USU Contest
67
5496
1672
Droid flies
Petrozavodsk Summer 2008. USU Contest
35
9365
1674
Drunk King
Petrozavodsk Summer 2008. USU Contest
61
5935
1678
Space Poker 3
Petrozavodsk Summer 2008. USU Contest
75
4958
1693
Loyd's Problem
Petrozavodsk Winter 2009. USU Contest
32
9910
1695
Work for Robots
Petrozavodsk Winter 2009. USU Contest
137
2831
1708
Sum of Digits 2
Ural Championship 2009
31
10108
1714
Mnemonics and Palindromes 2
NEERC 2009 Eastern Subregional
115
3193
1763
Expert Flea
Ural Championship 2010
64
5198
1819
Professional Approach
Petrozavodsk Summer 2010. Tavrida NU Contest
45
6584
1840
Victim of Advertising
Ural Championship 2011
41
6968
1842
Local Roots
Petrozavodsk Summer 2010. USU Contest
51
5655
1843
Cutting a Parallelepiped
Petrozavodsk Summer 2010. USU Contest
75
4058
1848
Fly Hunt
Petrozavodsk Summer 2010. USU Contest
69
4366
1853
Laser Technologies
Petrozavodsk Summer 2011. USU Contest
41
6754
1906
The Lost Civilization
Ural Championship 2012
37
6741
1952
To Kill the Dragon
Petrozavodsk Winter 2013. Ural FU Contest
23
9084
1954
Five Palindromes
Petrozavodsk Winter 2013. Ural FU Contest
73
3612
2016
Magic and Science
NEERC 2014 Eastern Subregional
31
6521
2054
Astronomy
Ural Championship 2015
32
6049
2076
Vasiana
NEERC 2015 Eastern Subregional Qualifier
26
6540
2082
Poker
Ural Championship 2016
25
6528
2131
Open Cup
Later is better than never
22
4995
2137
Dynamic string complexity
Later is better than never
20
5328
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