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Problem set. Hardest Problems
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ID
Title
Source
Authors
Difficulty
1058
Chocolate
NEERC 2000 Central Subregional
523
2801
1074
Very Short Problem
USU Personal Contest 2001
640
2118
1148
Building Towers
DSAP Vietnam Online Contest November 2001
276
1737
1166
Funny Card Game
NEERC 2001 Northern Subregional
133
3557
1171
Lost in Space
Romanian Online Contest December 2001
382
1268
1177
Like Comparisons
USU Personal Contest 2002
390
1246
1199
Mouse
129
3407
1216
Two Pawns and One King
USU Championship 2002
232
2077
1239
Ghost Busters
NEERC 2002
153
3089
1271
Sailing Directions
USU Championship 2003
100
4626
1312
Tray
Ural Championship 2004. Round 1
160
3009
1344
Gigantic Turnip
USU Championship 2004
104
4526
1369
Cockroach Race
Ural Championship 2005. Round 2
30
12918
1374
Misere
Ural Championship 2005. Round 1
38
10793
1376
Dean's Pyramid 2
Ural Championship 2005. Round 1
44
9593
1383
Flower-garden Designs
Petrozavodsk Summer 2005. Moscow+Ural Contest
42
9964
1384
Goat in the Garden 4
Petrozavodsk Summer 2005. Moscow+Ural Contest
94
4982
1388
Photo
Petrozavodsk Summer 2005. Moscow+Ural Contest
22
16191
1390
Shots at Walls
Petrozavodsk Summer 2005. Moscow+Ural Contest
44
9595
1391
Snake
Petrozavodsk Summer 2005. Moscow+Ural Contest
85
5454
1394
Ships. Version 2
23
15701
1395
Pascal vs. C++. Version 2
203
2338
1399
Economical Director
34
10762
1415
Mobile Life
USU Championship 2005
46
9223
1432
Twofold Luck
USU Personal Contest 2006
54
7880
1438
Time Limit Exceeded
USU Personal Contest 2006
159
2984
1460
Wires
Petrozavodsk Winter 2006. USU Contest
106
4202
1464
Light
Petrozavodsk Winter 2006. USU Contest
158
2902
1478
Spy Satellites
Petrozavodsk Summer 2006. Ural+Orel Contest
109
4061
1479
Scheduled Checking
Petrozavodsk Summer 2006. Ural+Orel Contest
97
4516
1524
Men in Black
Petrozavodsk Winter 2007. D.Gozman Contest
26
13028
1536
Delights of Pipe-weed
USU Personal Contest 2007
55
7197
1548
Sakura and Statistics
Ural Championship 2007
21
14941
1555
Find the Treasure!
Petrozavodsk Summer 2007. NSU Contest
37
9550
1556
Multishot in the Secret Cow Level
Petrozavodsk Summer 2007. NSU Contest
38
9351
1589
Sokoban
NEERC 2007 Eastern Subregional
19
15367
1594
Aztec Treasure
74
4702
1596
Knight Mare
23
9560
1618
Arrays Printing
Petrozavodsk Winter 2008. ITMO Contest
84
4462
1621
Definite Integral
Petrozavodsk Winter 2008. ITMO Contest
84
4462
1624
Go out of here!
Petrozavodsk Winter 2008. ITMO Contest
71
5178
1626
Interfering Segment
Petrozavodsk Winter 2008. ITMO Contest
43
7913
1649
Abstractionism to the People
NEERC 2008 Eastern Subregional
50
6880
1653
Death Conveyor
NEERC 2008 Eastern Subregional
51
6767
1660
The Island of Bad Luck
Petrozavodsk Winter 2008. USU Contest
52
6590
1661
Dodecahedron
Petrozavodsk Winter 2008. USU Contest
98
3783
1662
Goat in the Garden 6
Petrozavodsk Winter 2008. USU Contest
79
4591
1668
Death Star 2
Petrozavodsk Winter 2008. USU Contest
60
5837
1672
Droid flies
Petrozavodsk Summer 2008. USU Contest
26
11300
1674
Drunk King
Petrozavodsk Summer 2008. USU Contest
56
6164
1678
Space Poker 3
Petrozavodsk Summer 2008. USU Contest
56
6164
1693
Loyd's Problem
Petrozavodsk Winter 2009. USU Contest
27
10850
1695
Work for Robots
Petrozavodsk Winter 2009. USU Contest
129
2888
1708
Sum of Digits 2
Ural Championship 2009
25
11418
1714
Mnemonics and Palindromes 2
NEERC 2009 Eastern Subregional
110
3200
1763
Expert Flea
Ural Championship 2010
59
5350
1819
Professional Approach
Petrozavodsk Summer 2010. Tavrida NU Contest
37
7362
1840
Victim of Advertising
Ural Championship 2011
30
8477
1842
Local Roots
Petrozavodsk Summer 2010. USU Contest
39
6702
1843
Cutting a Parallelepiped
Petrozavodsk Summer 2010. USU Contest
69
4157
1848
Fly Hunt
Petrozavodsk Summer 2010. USU Contest
62
4561
1853
Laser Technologies
Petrozavodsk Summer 2011. Ural SU Team.GOV Contest
33
7626
1906
The Lost Civilization
Ural Championship 2012
29
7681
1952
To Kill the Dragon
Petrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection
15
11283
1954
Five Palindromes
Petrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection
62
3918
2016
Magic and Science
NEERC 2014 Eastern Subregional
19
8581
2054
Astronomy
Ural Championship 2015
20
7841
2076
Vasiana
Qualification of Eastern Subregional 2015
17
8005
2082
Poker
Ural Championship 2016
15
8359
2131
Open Cup
Later is better than never
15
5545
2137
Dynamic string complexity
Later is better than never
13
6027
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