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Problem set. NEERC Regionals
Solved problems:
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ID
Title
Source
Authors
Difficulty
1053
Pinocchio
NEERC 2000 Central Subregional
4357
331
1054
Tower of Hanoi
NEERC 2000 Central Subregional
2238
643
1055
Combinations
NEERC 2000 Central Subregional
3516
410
1056
Centers of the Net
NEERC 2000 Central Subregional
2654
543
1057
Amount of Degrees
NEERC 2000 Central Subregional
2027
710
1058
Chocolate
NEERC 2000 Central Subregional
510
2775
1059
Expression
NEERC 2000 Central Subregional
2192
657
1133
Fibonacci Sequence
NEERC 2001 Central Subregional
2165
221
1134
Cards
NEERC 2001 Central Subregional
2472
193
1135
Recruits
NEERC 2001 Central Subregional
2945
163
1136
Parliament
NEERC 2001 Central Subregional
4832
99
1137
Bus Routes
NEERC 2001 Central Subregional
1444
330
1138
Integer Percentage
NEERC 2001 Central Subregional
2391
200
1139
City Blocks
NEERC 2001 Central Subregional
6203
77
1140
Swamp Incident
NEERC 2001 Central Subregional
1280
372
1158
Censored!
NEERC 2001 Northern Subregional
951
500
1159
Fence
NEERC 2001 Northern Subregional
636
744
1160
Network
NEERC 2001 Northern Subregional
2851
170
1161
Stripies
NEERC 2001 Northern Subregional
5294
91
1162
Currency Exchange
NEERC 2001 Northern Subregional
1952
245
1163
Chapaev
NEERC 2001 Northern Subregional
96
4536
1164
Fillword
NEERC 2001 Northern Subregional
2377
201
1165
Subnumber
NEERC 2001 Northern Subregional
522
904
1166
Funny Card Game
NEERC 2001 Northern Subregional
129
3546
1224
Spiral
NEERC 2002 Central Subregional
7282
67
1225
Flags
NEERC 2002 Central Subregional
13535
36
1226
esreveR redrO
NEERC 2002 Central Subregional
4343
112
1227
Rally Championship
NEERC 2002 Central Subregional
1608
301
1228
Array
NEERC 2002 Central Subregional
4587
106
1229
Strong Brickwork
NEERC 2002 Central Subregional
1282
377
1230
Introspective Program
NEERC 2002 Central Subregional
638
751
1231
Turing: One, Two, Three, …
NEERC 2002 Central Subregional
218
2135
1232
Asteroid Landing
NEERC 2002 Central Subregional
194
2387
1274
Fractional Arithmetic
NEERC 2003 Central Subregional
700
695
1275
Knights of the Round Table
NEERC 2003 Central Subregional
194
2418
1276
Train
NEERC 2003 Central Subregional
651
746
1277
Cops and Thieves
NEERC 2003 Central Subregional
614
791
1278
“… Connecting People”
NEERC 2003 Central Subregional
496
975
1279
Warehouse
NEERC 2003 Central Subregional
1170
418
1280
Topological Sorting
NEERC 2003 Central Subregional
3464
142
1281
River Basin
NEERC 2003 Central Subregional
346
1386
1282
Game Tree
NEERC 2003 Central Subregional
1463
335
1500
Pass Licenses
NEERC 2006 Eastern Subregional
718
636
1501
Sense of Beauty
NEERC 2006 Eastern Subregional
1747
264
1502
Domino Dots
NEERC 2006 Eastern Subregional
6306
73
1503
Polynomial
NEERC 2006 Eastern Subregional
255
1748
1504
Good Manners
NEERC 2006 Eastern Subregional
196
2249
1505
Oil Transfer
NEERC 2006 Eastern Subregional
151
2877
1506
Columns of Numbers
NEERC 2006 Eastern Subregional
3163
146
1507
Difficult Decision
NEERC 2006 Eastern Subregional
1044
439
1508
Japanese Puzzle
NEERC 2006 Eastern Subregional
274
1631
1509
Domino Recognition
NEERC 2006 Eastern Subregional
122
3509
1510
Order
NEERC 2006 Eastern Subregional
5309
87
1582
Bookmakers
NEERC 2007 Eastern Subregional
3584
119
1583
Cheese
NEERC 2007 Eastern Subregional
219
1868
1584
Pharaohs’ Secrets
NEERC 2007 Eastern Subregional
312
1329
1585
Penguins
NEERC 2007 Eastern Subregional
11162
38
1586
Threeprime Numbers
NEERC 2007 Eastern Subregional
2957
144
1587
Flying Pig
NEERC 2007 Eastern Subregional
523
803
1588
Jamaica
NEERC 2007 Eastern Subregional
1323
321
1589
Sokoban
NEERC 2007 Eastern Subregional
12
19447
1590
Bacon’s Cipher
NEERC 2007 Eastern Subregional
2253
189
1591
Abstract Thinking
NEERC 2007 Eastern Subregional
395
1056
1592
Chinese Watches
NEERC 2007 Eastern Subregional
700
603
1649
Abstractionism to the People
NEERC 2008 Eastern Subregional
45
7162
1650
Billionaires
NEERC 2008 Eastern Subregional
1736
226
1651
Shortest Subchain
NEERC 2008 Eastern Subregional
1126
347
1652
Banking Crisis
NEERC 2008 Eastern Subregional
137
2680
1653
Death Conveyor
NEERC 2008 Eastern Subregional
47
6911
1654
Cipher Message
NEERC 2008 Eastern Subregional
6709
59
1655
Somali Pirates
NEERC 2008 Eastern Subregional
197
1903
1656
Far Away Kingdom's Army
NEERC 2008 Eastern Subregional
1958
200
1657
Cube Snake
NEERC 2008 Eastern Subregional
258
1470
1658
Sum of Digits
NEERC 2008 Eastern Subregional
2000
196
1659
Regular Triangles
NEERC 2008 Eastern Subregional
609
636
1711
Code Names
NEERC 2009 Eastern Subregional
2817
129
1712
Cipher Grille
NEERC 2009 Eastern Subregional
4440
82
1713
Key Substrings
NEERC 2009 Eastern Subregional
587
610
1714
Mnemonics and Palindromes 2
NEERC 2009 Eastern Subregional
107
3113
1715
Another Ball Killer
NEERC 2009 Eastern Subregional
360
984
1716
Alternative Solution
NEERC 2009 Eastern Subregional
477
748
1717
Eligibility Rules
NEERC 2009 Eastern Subregional
159
2155
1718
Rejudge
NEERC 2009 Eastern Subregional
1228
294
1719
Kill the Shaitan-Boss
NEERC 2009 Eastern Subregional
239
1463
1720
Summit Online Judge
NEERC 2009 Eastern Subregional
368
963
1721
Two Sides of the Same Coin
NEERC 2009 Eastern Subregional
635
565
1800
Murphy's Law
NEERC 2010 Eastern Subregional
1902
174
1801
The Revolution Cup
NEERC 2010 Eastern Subregional
50
5539
1802
Cube Puzzle
NEERC 2010 Eastern Subregional
154
2027
1803
The Czechs' Rifles
NEERC 2010 Eastern Subregional
457
712
1804
The Machinegunners in a Playoff
NEERC 2010 Eastern Subregional
852
386
1805
Chapaev and a Cipher Grille
NEERC 2010 Eastern Subregional
342
944
1806
Mobile Telegraphs
NEERC 2010 Eastern Subregional
1353
244
1807
Cartridges for Maxim
NEERC 2010 Eastern Subregional
227
1402
1808
Chapaev at the Planet Ocean
NEERC 2010 Eastern Subregional
167
1878
1809
Chapaev and Potatoes
NEERC 2010 Eastern Subregional
574
569
1885
Passenger Comfort
NEERC 2011 Eastern Subregional
1540
196
1886
Trip 2
NEERC 2011 Eastern Subregional
142
1997
1887
Frequent Flyer Card
NEERC 2011 Eastern Subregional
284
1033
1888
Pilot Work Experience
NEERC 2011 Eastern Subregional
666
449
1889
Airport Announcements
NEERC 2011 Eastern Subregional
1056
285
1890
Money out of Thin Air
NEERC 2011 Eastern Subregional
682
439
1891
Language Ocean
NEERC 2011 Eastern Subregional
449
661
1892
Morning in Koltsovo
NEERC 2011 Eastern Subregional
350
843
1893
A380
NEERC 2011 Eastern Subregional
5307
57
1894
Non-Flying Weather
NEERC 2011 Eastern Subregional
178
1615
1895
Steaks on Board
NEERC 2011 Eastern Subregional
133
2123
1910
Titan Ruins: Hidden Entrance
NEERC 2012 Eastern Subregional
8453
33
1911
Titan Ruins: Overtaking Fire
NEERC 2012 Eastern Subregional
53
4389
1912
Titan Ruins: Passing through Walls
NEERC 2012 Eastern Subregional
223
1187
1913
Titan Ruins: Alignment of Forces
NEERC 2012 Eastern Subregional
145
1784
1914
Titan Ruins: Serial Control
NEERC 2012 Eastern Subregional
54
4321
1915
Titan Ruins: Reconstruction of Bygones
NEERC 2012 Eastern Subregional
1343
204
1916
Titan Ruins: Waiting for Stability
NEERC 2012 Eastern Subregional
77
3179
1917
Titan Ruins: Deadly Accuracy
NEERC 2012 Eastern Subregional
1247
220
1918
Titan Ruins: Artful Manipulations
NEERC 2012 Eastern Subregional
304
881
1919
Titan Ruins: Transformation of Cylinders
NEERC 2012 Eastern Subregional
127
2018
1920
Titan Ruins: the Infinite Power of Magic
NEERC 2012 Eastern Subregional
400
674
1990
Podracing
NEERC 2013 Eastern Subregional
244
982
1991
The battle near the swamp
NEERC 2013 Eastern Subregional
5533
45
1992
CVS
NEERC 2013 Eastern Subregional
670
367
1993
This cheeseburger you don't need
NEERC 2013 Eastern Subregional
1321
187
1994
The Emperor's plan
NEERC 2013 Eastern Subregional
244
982
1995
Illegal spices
NEERC 2013 Eastern Subregional
436
559
1996
Cipher Message 3
NEERC 2013 Eastern Subregional
204
1166
1997
Those are not the droids you're looking for
NEERC 2013 Eastern Subregional
474
515
1998
The old Padawan
NEERC 2013 Eastern Subregional
720
342
1999
The secret module
NEERC 2013 Eastern Subregional
26
6928
2012
About Grisha N.
NEERC 2014 Eastern Subregional
13753
16
2013
Neither shaken nor stirred
NEERC 2014 Eastern Subregional
244
885
2014
Zhenya moves from parents
NEERC 2014 Eastern Subregional
427
514
2015
Zhenya moves from the dormitory
NEERC 2014 Eastern Subregional
802
277
2016
Magic and Science
NEERC 2014 Eastern Subregional
18
8025
2017
Best of a bad lot
NEERC 2014 Eastern Subregional
167
1270
2018
The Debut Album
NEERC 2014 Eastern Subregional
2213
101
2019
Pair: normal and paranormal
NEERC 2014 Eastern Subregional
849
262
2020
Traffic Jam in Flower Town
NEERC 2014 Eastern Subregional
1552
144
2021
Scarily interesting!
NEERC 2014 Eastern Subregional
534
413
2022
Riding a Toad
NEERC 2014 Eastern Subregional
53
3567
2023
Donald is a postman
NEERC 2014 Eastern Subregional
6104
37
2074
Timus problems classifier
Qualification of Eastern Subregional 2015
200
909
2075
Take care of your eyebrows!
Qualification of Eastern Subregional 2015
57
2850
2076
Vasiana
Qualification of Eastern Subregional 2015
16
7343
2077
Reductions
Qualification of Eastern Subregional 2015
17
7071
Solved problems:
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