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Problem set. Hardest Problems
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ID
Title
Source
Authors
Difficulty
1058
Chocolate
NEERC 2000 Central Subregional
518
2787
1074
Very Short Problem
USU Personal Contest 2001
634
2108
1148
Building Towers
DSAP Vietnam Online Contest November 2001
273
1731
1166
Funny Card Game
NEERC 2001 Northern Subregional
132
3535
1171
Lost in Space
Romanian Online Contest December 2001
373
1280
1177
Like Comparisons
USU Personal Contest 2002
386
1241
1199
Mouse
126
3430
1216
Two Pawns and One King
USU Championship 2002
230
2067
1239
Ghost Busters
NEERC 2002
151
3085
1271
Sailing Directions
USU Championship 2003
97
4693
1312
Tray
Ural Championship 2004. Round 1
159
2988
1344
Gigantic Turnip
USU Championship 2004
103
4508
1369
Cockroach Race
Ural Championship 2005. Round 2
27
13788
1374
Misere
Ural Championship 2005. Round 1
37
10883
1376
Dean's Pyramid 2
Ural Championship 2005. Round 1
44
9472
1383
Flower-garden Designs
Petrozavodsk Summer 2005. Moscow+Ural Contest
42
9838
1384
Goat in the Garden 4
Petrozavodsk Summer 2005. Moscow+Ural Contest
91
5065
1388
Photo
Petrozavodsk Summer 2005. Moscow+Ural Contest
21
16502
1390
Shots at Walls
Petrozavodsk Summer 2005. Moscow+Ural Contest
43
9652
1391
Snake
Petrozavodsk Summer 2005. Moscow+Ural Contest
85
5385
1394
Ships. Version 2
18
18271
1395
Pascal vs. C++. Version 2
200
2339
1399
Economical Director
33
10846
1415
Mobile Life
USU Championship 2005
44
9443
1432
Twofold Luck
USU Personal Contest 2006
52
8026
1438
Time Limit Exceeded
USU Personal Contest 2006
154
3034
1460
Wires
Petrozavodsk Winter 2006. USU Contest
104
4215
1464
Light
Petrozavodsk Winter 2006. USU Contest
155
2912
1478
Spy Satellites
Petrozavodsk Summer 2006. Ural+Orel Contest
109
4002
1479
Scheduled Checking
Petrozavodsk Summer 2006. Ural+Orel Contest
95
4535
1524
Men in Black
Petrozavodsk Winter 2007. D.Gozman Contest
25
13195
1536
Delights of Pipe-weed
USU Personal Contest 2007
53
7311
1548
Sakura and Statistics
Ural Championship 2007
20
15197
1555
Find the Treasure!
Petrozavodsk Summer 2007. NSU Contest
36
9595
1556
Multishot in the Secret Cow Level
Petrozavodsk Summer 2007. NSU Contest
37
9391
1589
Sokoban
NEERC 2007 Eastern Subregional
15
17525
1594
Aztec Treasure
71
4775
1596
Knight Mare
23
9278
1618
Arrays Printing
Petrozavodsk Winter 2008. ITMO Contest
84
4378
1621
Definite Integral
Petrozavodsk Winter 2008. ITMO Contest
79
4624
1624
Go out of here!
Petrozavodsk Winter 2008. ITMO Contest
71
5080
1626
Interfering Segment
Petrozavodsk Winter 2008. ITMO Contest
41
8069
1649
Abstractionism to the People
NEERC 2008 Eastern Subregional
48
6980
1653
Death Conveyor
NEERC 2008 Eastern Subregional
50
6747
1660
The Island of Bad Luck
Petrozavodsk Winter 2008. USU Contest
51
6567
1661
Dodecahedron
Petrozavodsk Winter 2008. USU Contest
97
3744
1662
Goat in the Garden 6
Petrozavodsk Winter 2008. USU Contest
76
4658
1668
Death Star 2
Petrozavodsk Winter 2008. USU Contest
59
5805
1672
Droid flies
Petrozavodsk Summer 2008. USU Contest
26
11076
1674
Drunk King
Petrozavodsk Summer 2008. USU Contest
55
6135
1678
Space Poker 3
Petrozavodsk Summer 2008. USU Contest
56
6042
1693
Loyd's Problem
Petrozavodsk Winter 2009. USU Contest
25
11238
1695
Work for Robots
Petrozavodsk Winter 2009. USU Contest
125
2914
1708
Sum of Digits 2
Ural Championship 2009
24
11514
1714
Mnemonics and Palindromes 2
NEERC 2009 Eastern Subregional
109
3157
1763
Expert Flea
Ural Championship 2010
58
5303
1819
Professional Approach
Petrozavodsk Summer 2010. Tavrida NU Contest
36
7329
1840
Victim of Advertising
Ural Championship 2011
28
8687
1842
Local Roots
Petrozavodsk Summer 2010. USU Contest
37
6793
1843
Cutting a Parallelepiped
Petrozavodsk Summer 2010. USU Contest
68
4093
1848
Fly Hunt
Petrozavodsk Summer 2010. USU Contest
52
5150
1853
Laser Technologies
Petrozavodsk Summer 2011. Ural SU Team.GOV Contest
32
7590
1906
The Lost Civilization
Ural Championship 2012
28
7633
1952
To Kill the Dragon
Petrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection
13
11841
1954
Five Palindromes
Petrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection
61
3836
2016
Magic and Science
NEERC 2014 Eastern Subregional
18
8524
2054
Astronomy
Ural Championship 2015
19
7754
2076
Vasiana
Qualification of Eastern Subregional 2015
16
7903
2082
Poker
Ural Championship 2016
15
7930
2131
Open Cup
Later is better than never
10
6347
2137
Dynamic string complexity
Later is better than never
9
6681
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