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Problem set. Hardest Problems
Solved problems:
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ID
Title
Source
Authors
Difficulty
1074
Very Short Problem
USU Personal Contest 2001
632
2114
1058
Chocolate
NEERC 2000 Central Subregional
517
2792
1177
Like Comparisons
USU Personal Contest 2002
386
1241
1171
Lost in Space
Romanian Online Contest December 2001
373
1280
1148
Building Towers
DSAP Vietnam Online Contest November 2001
273
1730
1216
Two Pawns and One King
USU Championship 2002
230
2066
1395
Pascal vs. C++. Version 2
200
2339
1312
Tray
Ural Championship 2004. Round 1
159
2987
1464
Light
Petrozavodsk Winter 2006. USU Contest
155
2911
1438
Time Limit Exceeded
USU Personal Contest 2006
154
3033
1239
Ghost Busters
NEERC 2002
151
3084
1166
Funny Card Game
NEERC 2001 Northern Subregional
132
3535
1199
Mouse
126
3429
1695
Work for Robots
Petrozavodsk Winter 2009. USU Contest
125
2913
1478
Spy Satellites
Petrozavodsk Summer 2006. Ural+Orel Contest
109
4001
1714
Mnemonics and Palindromes 2
NEERC 2009 Eastern Subregional
109
3155
1460
Wires
Petrozavodsk Winter 2006. USU Contest
104
4214
1344
Gigantic Turnip
USU Championship 2004
103
4507
1271
Sailing Directions
USU Championship 2003
97
4692
1661
Dodecahedron
Petrozavodsk Winter 2008. USU Contest
97
3742
1479
Scheduled Checking
Petrozavodsk Summer 2006. Ural+Orel Contest
95
4534
1384
Goat in the Garden 4
Petrozavodsk Summer 2005. Moscow+Ural Contest
91
5064
1391
Snake
Petrozavodsk Summer 2005. Moscow+Ural Contest
85
5384
1618
Arrays Printing
Petrozavodsk Winter 2008. ITMO Contest
84
4376
1621
Definite Integral
Petrozavodsk Winter 2008. ITMO Contest
79
4622
1662
Goat in the Garden 6
Petrozavodsk Winter 2008. USU Contest
76
4656
1594
Aztec Treasure
71
4773
1624
Go out of here!
Petrozavodsk Winter 2008. ITMO Contest
71
5079
1843
Cutting a Parallelepiped
Petrozavodsk Summer 2010. USU Contest
68
4091
1954
Five Palindromes
Petrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection
61
3834
1668
Death Star 2
Petrozavodsk Winter 2008. USU Contest
59
5803
1763
Expert Flea
Ural Championship 2010
58
5300
1678
Space Poker 3
Petrozavodsk Summer 2008. USU Contest
56
6040
1674
Drunk King
Petrozavodsk Summer 2008. USU Contest
55
6133
1536
Delights of Pipe-weed
USU Personal Contest 2007
53
7309
1432
Twofold Luck
USU Personal Contest 2006
52
8024
1848
Fly Hunt
Petrozavodsk Summer 2010. USU Contest
52
5147
1660
The Island of Bad Luck
Petrozavodsk Winter 2008. USU Contest
51
6565
1653
Death Conveyor
NEERC 2008 Eastern Subregional
50
6745
1649
Abstractionism to the People
NEERC 2008 Eastern Subregional
48
6978
1376
Dean's Pyramid 2
Ural Championship 2005. Round 1
44
9470
1415
Mobile Life
USU Championship 2005
44
9441
1390
Shots at Walls
Petrozavodsk Summer 2005. Moscow+Ural Contest
43
9650
1383
Flower-garden Designs
Petrozavodsk Summer 2005. Moscow+Ural Contest
42
9836
1626
Interfering Segment
Petrozavodsk Winter 2008. ITMO Contest
41
8066
1374
Misere
Ural Championship 2005. Round 1
37
10881
1556
Multishot in the Secret Cow Level
Petrozavodsk Summer 2007. NSU Contest
37
9388
1842
Local Roots
Petrozavodsk Summer 2010. USU Contest
37
6790
1555
Find the Treasure!
Petrozavodsk Summer 2007. NSU Contest
36
9592
1819
Professional Approach
Petrozavodsk Summer 2010. Tavrida NU Contest
36
7326
1399
Economical Director
33
10843
1853
Laser Technologies
Petrozavodsk Summer 2011. Ural SU Team.GOV Contest
32
7587
1840
Victim of Advertising
Ural Championship 2011
28
8683
1906
The Lost Civilization
Ural Championship 2012
28
7629
1369
Cockroach Race
Ural Championship 2005. Round 2
27
13785
1672
Droid flies
Petrozavodsk Summer 2008. USU Contest
26
11072
1693
Loyd's Problem
Petrozavodsk Winter 2009. USU Contest
25
11234
1524
Men in Black
Petrozavodsk Winter 2007. D.Gozman Contest
24
13579
1708
Sum of Digits 2
Ural Championship 2009
24
11510
1596
Knight Mare
23
9273
1388
Photo
Petrozavodsk Summer 2005. Moscow+Ural Contest
21
16499
1548
Sakura and Statistics
Ural Championship 2007
19
15716
2054
Astronomy
Ural Championship 2015
19
7747
2016
Magic and Science
NEERC 2014 Eastern Subregional
18
8517
1394
Ships. Version 2
17
18944
2076
Vasiana
Qualification of Eastern Subregional 2015
16
7896
2082
Poker
Ural Championship 2016
15
7922
1589
Sokoban
NEERC 2007 Eastern Subregional
14
18250
1952
To Kill the Dragon
Petrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection
13
11833
2131
Open Cup
Later is better than never
10
6337
2137
Dynamic string complexity
Later is better than never
9
6670
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