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Problem set. NEERC Regionals
Solved problems:
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ID
Title
Source
Authors
Difficulty
2012
About Grisha N.
NEERC 2014 Eastern Subregional
15326
17
1225
Flags
NEERC 2002 Central Subregional
14319
35
1585
Penguins
NEERC 2007 Eastern Subregional
11828
38
1910
Titan Ruins: Hidden Entrance
NEERC 2012 Eastern Subregional
9067
34
1224
Spiral
NEERC 2002 Central Subregional
7645
66
1654
Cipher Message
NEERC 2008 Eastern Subregional
7041
59
2023
Donald is a postman
NEERC 2014 Eastern Subregional
6632
38
1502
Domino Dots
NEERC 2006 Eastern Subregional
6552
74
1139
City Blocks
NEERC 2001 Central Subregional
6434
78
1991
The battle near the swamp
NEERC 2013 Eastern Subregional
5919
47
1893
A380
NEERC 2011 Eastern Subregional
5627
59
1510
Order
NEERC 2006 Eastern Subregional
5542
87
1161
Stripies
NEERC 2001 Northern Subregional
5444
92
1136
Parliament
NEERC 2001 Central Subregional
5012
100
1228
Array
NEERC 2002 Central Subregional
4679
108
1712
Cipher Grille
NEERC 2009 Eastern Subregional
4584
85
1226
esreveR redrO
NEERC 2002 Central Subregional
4459
113
1053
Pinocchio
NEERC 2000 Central Subregional
4426
340
1582
Bookmakers
NEERC 2007 Eastern Subregional
3682
122
1280
Topological Sorting
NEERC 2003 Central Subregional
3620
141
1055
Combinations
NEERC 2000 Central Subregional
3591
419
1506
Columns of Numbers
NEERC 2006 Eastern Subregional
3458
140
1160
Network
NEERC 2001 Northern Subregional
3455
146
1586
Threeprime Numbers
NEERC 2007 Eastern Subregional
3114
144
1135
Recruits
NEERC 2001 Central Subregional
3097
161
1711
Code Names
NEERC 2009 Eastern Subregional
2932
132
1056
Centers of the Net
NEERC 2000 Central Subregional
2738
549
1134
Cards
NEERC 2001 Central Subregional
2543
196
1162
Currency Exchange
NEERC 2001 Northern Subregional
2534
197
2018
The Debut Album
NEERC 2014 Eastern Subregional
2512
101
1138
Integer Percentage
NEERC 2001 Central Subregional
2469
202
1164
Fillword
NEERC 2001 Northern Subregional
2427
206
1590
Bacon’s Cipher
NEERC 2007 Eastern Subregional
2395
187
1054
Tower of Hanoi
NEERC 2000 Central Subregional
2349
640
1650
Billionaires
NEERC 2008 Eastern Subregional
2261
184
1133
Fibonacci Sequence
NEERC 2001 Central Subregional
2233
223
1059
Expression
NEERC 2000 Central Subregional
2229
674
1057
Amount of Degrees
NEERC 2000 Central Subregional
2104
714
1800
Murphy's Law
NEERC 2010 Eastern Subregional
2102
170
1658
Sum of Digits
NEERC 2008 Eastern Subregional
2076
200
1656
Far Away Kingdom's Army
NEERC 2008 Eastern Subregional
2034
204
1806
Mobile Telegraphs
NEERC 2010 Eastern Subregional
1889
189
1501
Sense of Beauty
NEERC 2006 Eastern Subregional
1807
266
1885
Passenger Comfort
NEERC 2011 Eastern Subregional
1682
196
1227
Rally Championship
NEERC 2002 Central Subregional
1671
302
2020
Traffic Jam in Flower Town
NEERC 2014 Eastern Subregional
1627
156
1137
Bus Routes
NEERC 2001 Central Subregional
1545
322
1282
Game Tree
NEERC 2003 Central Subregional
1512
337
1915
Titan Ruins: Reconstruction of Bygones
NEERC 2012 Eastern Subregional
1391
218
1993
This cheeseburger you don't need
NEERC 2013 Eastern Subregional
1391
199
1588
Jamaica
NEERC 2007 Eastern Subregional
1374
325
1229
Strong Brickwork
NEERC 2002 Central Subregional
1319
381
1140
Swamp Incident
NEERC 2001 Central Subregional
1314
378
1917
Titan Ruins: Deadly Accuracy
NEERC 2012 Eastern Subregional
1292
234
1718
Rejudge
NEERC 2009 Eastern Subregional
1265
305
1651
Shortest Subchain
NEERC 2008 Eastern Subregional
1207
343
1279
Warehouse
NEERC 2003 Central Subregional
1202
423
1889
Airport Announcements
NEERC 2011 Eastern Subregional
1093
300
1507
Difficult Decision
NEERC 2006 Eastern Subregional
1080
444
1158
Censored!
NEERC 2001 Northern Subregional
982
505
2019
Pair: normal and paranormal
NEERC 2014 Eastern Subregional
883
286
1804
The Machinegunners in a Playoff
NEERC 2010 Eastern Subregional
879
403
2015
Zhenya moves from the dormitory
NEERC 2014 Eastern Subregional
860
293
1998
The old Padawan
NEERC 2013 Eastern Subregional
749
367
1500
Pass Licenses
NEERC 2006 Eastern Subregional
748
639
1592
Chinese Watches
NEERC 2007 Eastern Subregional
744
597
1274
Fractional Arithmetic
NEERC 2003 Central Subregional
736
688
1992
CVS
NEERC 2013 Eastern Subregional
725
379
1888
Pilot Work Experience
NEERC 2011 Eastern Subregional
711
459
1890
Money out of Thin Air
NEERC 2011 Eastern Subregional
711
459
1276
Train
NEERC 2003 Central Subregional
686
737
1721
Two Sides of the Same Coin
NEERC 2009 Eastern Subregional
662
579
1230
Introspective Program
NEERC 2002 Central Subregional
655
762
1159
Fence
NEERC 2001 Northern Subregional
654
755
1277
Cops and Thieves
NEERC 2003 Central Subregional
638
792
1659
Regular Triangles
NEERC 2008 Eastern Subregional
634
648
1713
Key Substrings
NEERC 2009 Eastern Subregional
607
631
1809
Chapaev and Potatoes
NEERC 2010 Eastern Subregional
594
593
2021
Scarily interesting!
NEERC 2014 Eastern Subregional
556
451
1587
Flying Pig
NEERC 2007 Eastern Subregional
541
817
1165
Subnumber
NEERC 2001 Northern Subregional
531
926
1058
Chocolate
NEERC 2000 Central Subregional
527
2803
1278
“… Connecting People”
NEERC 2003 Central Subregional
509
989
1716
Alternative Solution
NEERC 2009 Eastern Subregional
508
751
1997
Those are not the droids you're looking for
NEERC 2013 Eastern Subregional
502
544
1803
The Czechs' Rifles
NEERC 2010 Eastern Subregional
500
703
1891
Language Ocean
NEERC 2011 Eastern Subregional
466
695
2014
Zhenya moves from parents
NEERC 2014 Eastern Subregional
461
541
1995
Illegal spices
NEERC 2013 Eastern Subregional
452
603
1920
Titan Ruins: the Infinite Power of Magic
NEERC 2012 Eastern Subregional
415
717
1591
Abstract Thinking
NEERC 2007 Eastern Subregional
411
1069
1720
Summit Online Judge
NEERC 2009 Eastern Subregional
385
985
1715
Another Ball Killer
NEERC 2009 Eastern Subregional
375
1010
1892
Morning in Koltsovo
NEERC 2011 Eastern Subregional
363
887
1281
River Basin
NEERC 2003 Central Subregional
362
1379
1805
Chapaev and a Cipher Grille
NEERC 2010 Eastern Subregional
346
1007
1584
Pharaohs’ Secrets
NEERC 2007 Eastern Subregional
319
1368
1918
Titan Ruins: Artful Manipulations
NEERC 2012 Eastern Subregional
315
938
1887
Frequent Flyer Card
NEERC 2011 Eastern Subregional
299
1071
1508
Japanese Puzzle
NEERC 2006 Eastern Subregional
290
1614
1503
Polynomial
NEERC 2006 Eastern Subregional
270
1729
1657
Cube Snake
NEERC 2008 Eastern Subregional
264
1524
2013
Neither shaken nor stirred
NEERC 2014 Eastern Subregional
261
941
1990
Podracing
NEERC 2013 Eastern Subregional
256
1048
1994
The Emperor's plan
NEERC 2013 Eastern Subregional
254
1056
1719
Kill the Shaitan-Boss
NEERC 2009 Eastern Subregional
251
1491
1807
Cartridges for Maxim
NEERC 2010 Eastern Subregional
233
1475
1912
Titan Ruins: Passing through Walls
NEERC 2012 Eastern Subregional
230
1270
1583
Cheese
NEERC 2007 Eastern Subregional
228
1892
1231
Turing: One, Two, Three, …
NEERC 2002 Central Subregional
225
2157
2074
Timus problems classifier
Qualification of Eastern Subregional 2015
217
980
1894
Non-Flying Weather
NEERC 2011 Eastern Subregional
216
1464
1655
Somali Pirates
NEERC 2008 Eastern Subregional
214
1864
1996
Cipher Message 3
NEERC 2013 Eastern Subregional
214
1244
1504
Good Manners
NEERC 2006 Eastern Subregional
208
2221
1275
Knights of the Round Table
NEERC 2003 Central Subregional
205
2386
1232
Asteroid Landing
NEERC 2002 Central Subregional
204
2369
2017
Best of a bad lot
NEERC 2014 Eastern Subregional
180
1342
1808
Chapaev at the Planet Ocean
NEERC 2010 Eastern Subregional
172
1969
1717
Eligibility Rules
NEERC 2009 Eastern Subregional
165
2223
1802
Cube Puzzle
NEERC 2010 Eastern Subregional
160
2109
1505
Oil Transfer
NEERC 2006 Eastern Subregional
156
2917
1913
Titan Ruins: Alignment of Forces
NEERC 2012 Eastern Subregional
151
1893
1886
Trip 2
NEERC 2011 Eastern Subregional
148
2094
1652
Banking Crisis
NEERC 2008 Eastern Subregional
143
2729
1895
Steaks on Board
NEERC 2011 Eastern Subregional
143
2162
1919
Titan Ruins: Transformation of Cylinders
NEERC 2012 Eastern Subregional
136
2088
1166
Funny Card Game
NEERC 2001 Northern Subregional
133
3585
1509
Domino Recognition
NEERC 2006 Eastern Subregional
128
3509
1163
Chapaev
NEERC 2001 Northern Subregional
112
4108
1714
Mnemonics and Palindromes 2
NEERC 2009 Eastern Subregional
111
3215
1916
Titan Ruins: Waiting for Stability
NEERC 2012 Eastern Subregional
82
3313
2075
Take care of your eyebrows!
Qualification of Eastern Subregional 2015
70
2782
1914
Titan Ruins: Serial Control
NEERC 2012 Eastern Subregional
58
4482
2022
Riding a Toad
NEERC 2014 Eastern Subregional
58
3750
1911
Titan Ruins: Overtaking Fire
NEERC 2012 Eastern Subregional
56
4618
1801
The Revolution Cup
NEERC 2010 Eastern Subregional
54
5601
1653
Death Conveyor
NEERC 2008 Eastern Subregional
53
6629
1649
Abstractionism to the People
NEERC 2008 Eastern Subregional
51
6846
1999
The secret module
NEERC 2013 Eastern Subregional
30
6969
2194
Snakes&Snakes
ICPC Ural Regional Contest Qualifier 2023
27
990
1589
Sokoban
NEERC 2007 Eastern Subregional
19
15524
2016
Magic and Science
NEERC 2014 Eastern Subregional
19
8793
2077
Reductions
Qualification of Eastern Subregional 2015
19
7674
2076
Vasiana
Qualification of Eastern Subregional 2015
18
7948
2192
My Grandfather
ICPC Ural Regional Contest Qualifier 2022
15
1466
2198
Deep Understanding
ICPC Ural Regional Contest Qualifier 2024
13
1589
2199
Company Question
ICPC Ural Regional Contest Qualifier 2024
12
1666
2190
Match of the Millennium
ICPC Ural Regional Contest Qualifier 2022
11
1745
2195
Binary Trees
ICPC Ural Regional Contest Qualifier 2023
9
1929
2193
Old Barabarian Rap
ICPC Ural Regional Contest Qualifier 2022
8
2028
2191
Piecewise Linear Functions
ICPC Ural Regional Contest Qualifier 2022
7
2147
2196
Apocalypse
ICPC Ural Regional Contest Qualifier 2023
6
2278
2197
Work is not a wolf; a wolf is to walk
ICPC Ural Regional Contest Qualifier 2024
6
2290
Solved problems:
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