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Problem set. Hardest Problems
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ID
Title
Source
Authors
Difficulty
1058
Chocolate
NEERC 2000 Central Subregional
528
2806
1074
Very Short Problem
USU Personal Contest 2001
649
2112
1148
Building Towers
DSAP Vietnam Online Contest November 2001
280
1731
1166
Funny Card Game
NEERC 2001 Northern Subregional
133
3594
1171
Lost in Space
Romanian Online Contest December 2001
386
1269
1177
Like Comparisons
USU Personal Contest 2002
393
1250
1199
Mouse
131
3399
1216
Two Pawns and One King
USU Championship 2002
233
2091
1239
Ghost Busters
NEERC 2002
153
3122
1271
Sailing Directions
USU Championship 2003
101
4632
1312
Tray
Ural Championship 2004. Round 1
161
3022
1344
Gigantic Turnip
USU Championship 2004
106
4493
1369
Cockroach Race
Ural Championship 2005. Round 2
32
12427
1374
Misere
Ural Championship 2005. Round 1
39
10679
1376
Dean's Pyramid 2
Ural Championship 2005. Round 1
44
9690
1383
Flower-garden Designs
Petrozavodsk Summer 2005. Moscow+Ural Contest
44
9691
1384
Goat in the Garden 4
Petrozavodsk Summer 2005. Moscow+Ural Contest
96
4937
1388
Photo
Petrozavodsk Summer 2005. Moscow+Ural Contest
24
15392
1390
Shots at Walls
Petrozavodsk Summer 2005. Moscow+Ural Contest
47
9181
1391
Snake
Petrozavodsk Summer 2005. Moscow+Ural Contest
85
5509
1394
Ships. Version 2
23
15859
1395
Pascal vs. C++. Version 2
208
2309
1399
Economical Director
37
10196
1415
Mobile Life
USU Championship 2005
46
9316
1432
Twofold Luck
USU Personal Contest 2006
54
7964
1438
Time Limit Exceeded
USU Personal Contest 2006
160
2998
1460
Wires
Petrozavodsk Winter 2006. USU Contest
107
4214
1464
Light
Petrozavodsk Winter 2006. USU Contest
160
2900
1478
Spy Satellites
Petrozavodsk Summer 2006. Ural+Orel Contest
111
4040
1479
Scheduled Checking
Petrozavodsk Summer 2006. Ural+Orel Contest
99
4485
1524
Men in Black
Petrozavodsk Winter 2007. D.Gozman Contest
27
12831
1536
Delights of Pipe-weed
USU Personal Contest 2007
55
7286
1548
Sakura and Statistics
Ural Championship 2007
22
14656
1555
Find the Treasure!
Petrozavodsk Summer 2007. NSU Contest
39
9282
1556
Multishot in the Secret Cow Level
Petrozavodsk Summer 2007. NSU Contest
38
9475
1589
Sokoban
NEERC 2007 Eastern Subregional
19
15574
1594
Aztec Treasure
77
4615
1596
Knight Mare
24
9496
1618
Arrays Printing
Petrozavodsk Winter 2008. ITMO Contest
86
4434
1621
Definite Integral
Petrozavodsk Winter 2008. ITMO Contest
86
4434
1624
Go out of here!
Petrozavodsk Winter 2008. ITMO Contest
72
5191
1626
Interfering Segment
Petrozavodsk Winter 2008. ITMO Contest
43
8031
1649
Abstractionism to the People
NEERC 2008 Eastern Subregional
51
6871
1653
Death Conveyor
NEERC 2008 Eastern Subregional
53
6653
1660
The Island of Bad Luck
Petrozavodsk Winter 2008. USU Contest
53
6587
1661
Dodecahedron
Petrozavodsk Winter 2008. USU Contest
100
3773
1662
Goat in the Garden 6
Petrozavodsk Winter 2008. USU Contest
80
4611
1668
Death Star 2
Petrozavodsk Winter 2008. USU Contest
60
5928
1672
Droid flies
Petrozavodsk Summer 2008. USU Contest
27
11168
1674
Drunk King
Petrozavodsk Summer 2008. USU Contest
56
6261
1678
Space Poker 3
Petrozavodsk Summer 2008. USU Contest
69
5231
1693
Loyd's Problem
Petrozavodsk Winter 2009. USU Contest
29
10460
1695
Work for Robots
Petrozavodsk Winter 2009. USU Contest
131
2893
1708
Sum of Digits 2
Ural Championship 2009
26
11281
1714
Mnemonics and Palindromes 2
NEERC 2009 Eastern Subregional
111
3228
1763
Expert Flea
Ural Championship 2010
59
5449
1819
Professional Approach
Petrozavodsk Summer 2010. Tavrida NU Contest
40
7061
1840
Victim of Advertising
Ural Championship 2011
31
8445
1842
Local Roots
Petrozavodsk Summer 2010. USU Contest
46
5994
1843
Cutting a Parallelepiped
Petrozavodsk Summer 2010. USU Contest
71
4144
1848
Fly Hunt
Petrozavodsk Summer 2010. USU Contest
63
4598
1853
Laser Technologies
Petrozavodsk Summer 2011. Ural SU Team.GOV Contest
34
7618
1906
The Lost Civilization
Ural Championship 2012
29
7875
1952
To Kill the Dragon
Petrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection
15
11593
1954
Five Palindromes
Petrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection
65
3865
2016
Magic and Science
NEERC 2014 Eastern Subregional
21
8289
2054
Astronomy
Ural Championship 2015
22
7609
2076
Vasiana
Qualification of Eastern Subregional 2015
18
8021
2082
Poker
Ural Championship 2016
16
8366
2131
Open Cup
Later is better than never
15
5918
2137
Dynamic string complexity
Later is better than never
13
6432
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