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Problem set. Hardest Problems
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ID
Title
Source
Authors
Difficulty
1074
Very Short Problem
USU Personal Contest 2001
601
2059
1058
Chocolate
NEERC 2000 Central Subregional
471
2834
1171
Lost in Space
Romanian Online Contest December 2001
340
1301
1177
Like Comparisons
USU Personal Contest 2002
338
1312
1148
Building Towers
DSAP Vietnam Online Contest November 2001
248
1762
1216
Two Pawns and One King
USU Championship 2002
216
2041
1395
Pascal vs. C++. Version 2
165
2607
1312
Tray
Ural Championship 2004. Round 1
153
2889
1239
Ghost Busters
NEERC 2002
147
2943
1464
Light
Petrozavodsk Winter 2006. USU Contest
144
2888
1438
Time Limit Exceeded
USU Personal Contest 2006
140
3087
1166
Funny Card Game
NEERC 2001 Northern Subregional
121
3571
1695
Work for Robots
Petrozavodsk Winter 2009. USU Contest
113
2859
1199
Mouse
108
3642
1714
Mnemonics and Palindromes 2
NEERC 2009 Eastern Subregional
106
2868
1478
Spy Satellites
Petrozavodsk Summer 2006. Ural+Orel Contest
103
3895
1344
Gigantic Turnip
USU Championship 2004
97
4445
1460
Wires
Petrozavodsk Winter 2006. USU Contest
96
4196
1271
Sailing Directions
USU Championship 2003
92
4587
1384
Goat in the Garden 4
Petrozavodsk Summer 2005. Moscow+Ural Contest
83
5139
1391
Snake
Petrozavodsk Summer 2005. Moscow+Ural Contest
80
5311
1661
Dodecahedron
Petrozavodsk Winter 2008. USU Contest
77
4130
1479
Scheduled Checking
Petrozavodsk Summer 2006. Ural+Orel Contest
72
5368
1621
Definite Integral
Petrozavodsk Winter 2008. ITMO Contest
69
4696
1662
Goat in the Garden 6
Petrozavodsk Winter 2008. USU Contest
68
4607
1843
Cutting a Parallelepiped
Petrozavodsk Summer 2010. USU Contest
64
3681
1594
Aztec Treasure
62
4785
1618
Arrays Printing
Petrozavodsk Winter 2008. ITMO Contest
61
5226
1954
Five Palindromes
Petrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection
54
3473
1763
Expert Flea
Ural Championship 2010
52
5106
1536
Delights of Pipe-weed
USU Personal Contest 2007
51
6942
1674
Drunk King
Petrozavodsk Summer 2008. USU Contest
48
6162
1624
Go out of here!
Petrozavodsk Winter 2008. ITMO Contest
47
6509
1660
The Island of Bad Luck
Petrozavodsk Winter 2008. USU Contest
47
6304
1668
Death Star 2
Petrozavodsk Winter 2008. USU Contest
47
6304
1432
Twofold Luck
USU Personal Contest 2006
46
8268
1653
Death Conveyor
NEERC 2008 Eastern Subregional
44
6738
1649
Abstractionism to the People
NEERC 2008 Eastern Subregional
42
6998
1415
Mobile Life
USU Championship 2005
41
9337
1848
Fly Hunt
Petrozavodsk Summer 2010. USU Contest
40
5449
1376
Dean's Pyramid 2
Ural Championship 2005. Round 1
39
9753
1390
Shots at Walls
Petrozavodsk Summer 2005. Moscow+Ural Contest
39
9754
1626
Interfering Segment
Petrozavodsk Winter 2008. ITMO Contest
37
7894
1819
Professional Approach
Petrozavodsk Summer 2010. Tavrida NU Contest
35
6478
1556
Multishot in the Secret Cow Level
Petrozavodsk Summer 2007. NSU Contest
34
9158
1842
Local Roots
Petrozavodsk Summer 2010. USU Contest
34
6192
1374
Misere
Ural Championship 2005. Round 1
32
11378
1399
Economical Director
30
10742
1678
Space Poker 3
Petrozavodsk Summer 2008. USU Contest
30
8934
1853
Laser Technologies
Petrozavodsk Summer 2011. Ural SU Team.GOV Contest
29
6972
1369
Cockroach Race
Ural Championship 2005. Round 2
26
13235
1906
The Lost Civilization
Ural Championship 2012
26
6700
1555
Find the Treasure!
Petrozavodsk Summer 2007. NSU Contest
25
11513
1383
Flower-garden Designs
Petrozavodsk Summer 2005. Moscow+Ural Contest
24
14058
1524
Men in Black
Petrozavodsk Winter 2007. D.Gozman Contest
24
12494
1840
Victim of Advertising
Ural Championship 2011
23
8607
1672
Droid flies
Petrozavodsk Summer 2008. USU Contest
22
11168
1693
Loyd's Problem
Petrozavodsk Winter 2009. USU Contest
22
10987
1388
Photo
Petrozavodsk Summer 2005. Moscow+Ural Contest
19
16481
1596
Knight Mare
19
8912
1708
Sum of Digits 2
Ural Championship 2009
18
12486
2016
Magic and Science
NEERC 2014 Eastern Subregional
17
6899
2054
Astronomy
Ural Championship 2015
16
6597
1548
Sakura and Statistics
Ural Championship 2007
14
17436
2076
Vasiana
Qualification of Eastern Subregional 2015
13
6557
1394
Ships. Version 2
12
21727
2082
Poker
Ural Championship 2016
12
6503
1952
To Kill the Dragon
Petrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection
10
11113
1589
Sokoban
NEERC 2007 Eastern Subregional
9
21024
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