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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
14562
16
1910
Titan Ruins: Hidden Entrance
NEERC 2012 Eastern Subregional
8764
33
1225
Flags
NEERC 2002 Central Subregional
13943
35
2023
Donald is a postman
NEERC 2014 Eastern Subregional
6370
37
1585
Penguins
NEERC 2007 Eastern Subregional
11505
38
1991
The battle near the swamp
NEERC 2013 Eastern Subregional
5750
45
1893
A380
NEERC 2011 Eastern Subregional
5499
57
1654
Cipher Message
NEERC 2008 Eastern Subregional
6895
58
1224
Spiral
NEERC 2002 Central Subregional
7492
66
1502
Domino Dots
NEERC 2006 Eastern Subregional
6431
73
1139
City Blocks
NEERC 2001 Central Subregional
6340
77
1712
Cipher Grille
NEERC 2009 Eastern Subregional
4514
83
1510
Order
NEERC 2006 Eastern Subregional
5441
87
1161
Stripies
NEERC 2001 Northern Subregional
5376
91
1136
Parliament
NEERC 2001 Central Subregional
4931
99
2018
The Debut Album
NEERC 2014 Eastern Subregional
2337
101
1228
Array
NEERC 2002 Central Subregional
4629
107
1226
esreveR redrO
NEERC 2002 Central Subregional
4392
112
1582
Bookmakers
NEERC 2007 Eastern Subregional
3631
120
1711
Code Names
NEERC 2009 Eastern Subregional
2879
130
1506
Columns of Numbers
NEERC 2006 Eastern Subregional
3337
141
1280
Topological Sorting
NEERC 2003 Central Subregional
3514
142
1586
Threeprime Numbers
NEERC 2007 Eastern Subregional
3022
144
2020
Traffic Jam in Flower Town
NEERC 2014 Eastern Subregional
1592
148
1135
Recruits
NEERC 2001 Central Subregional
3028
161
1160
Network
NEERC 2001 Northern Subregional
3007
164
1800
Murphy's Law
NEERC 2010 Eastern Subregional
2027
168
1590
Bacon’s Cipher
NEERC 2007 Eastern Subregional
2289
190
1993
This cheeseburger you don't need
NEERC 2013 Eastern Subregional
1347
193
1134
Cards
NEERC 2001 Central Subregional
2509
194
1885
Passenger Comfort
NEERC 2011 Eastern Subregional
1597
196
1658
Sum of Digits
NEERC 2008 Eastern Subregional
2034
197
1138
Integer Percentage
NEERC 2001 Central Subregional
2428
200
1656
Far Away Kingdom's Army
NEERC 2008 Eastern Subregional
1992
202
1164
Fillword
NEERC 2001 Northern Subregional
2397
203
1915
Titan Ruins: Reconstruction of Bygones
NEERC 2012 Eastern Subregional
1368
209
1650
Billionaires
NEERC 2008 Eastern Subregional
1876
214
1133
Fibonacci Sequence
NEERC 2001 Central Subregional
2190
222
1917
Titan Ruins: Deadly Accuracy
NEERC 2012 Eastern Subregional
1267
225
1806
Mobile Telegraphs
NEERC 2010 Eastern Subregional
1505
226
1162
Currency Exchange
NEERC 2001 Northern Subregional
2121
230
1501
Sense of Beauty
NEERC 2006 Eastern Subregional
1776
264
2019
Pair: normal and paranormal
NEERC 2014 Eastern Subregional
864
271
2015
Zhenya moves from the dormitory
NEERC 2014 Eastern Subregional
818
286
1889
Airport Announcements
NEERC 2011 Eastern Subregional
1069
292
1718
Rejudge
NEERC 2009 Eastern Subregional
1242
299
1227
Rally Championship
NEERC 2002 Central Subregional
1642
300
1588
Jamaica
NEERC 2007 Eastern Subregional
1348
322
1137
Bus Routes
NEERC 2001 Central Subregional
1476
329
1053
Pinocchio
NEERC 2000 Central Subregional
4392
334
1282
Game Tree
NEERC 2003 Central Subregional
1482
336
1651
Shortest Subchain
NEERC 2008 Eastern Subregional
1159
345
1998
The old Padawan
NEERC 2013 Eastern Subregional
735
351
1992
CVS
NEERC 2013 Eastern Subregional
694
371
1140
Swamp Incident
NEERC 2001 Central Subregional
1293
375
1229
Strong Brickwork
NEERC 2002 Central Subregional
1297
379
1804
The Machinegunners in a Playoff
NEERC 2010 Eastern Subregional
864
392
1055
Combinations
NEERC 2000 Central Subregional
3553
413
1279
Warehouse
NEERC 2003 Central Subregional
1182
421
2021
Scarily interesting!
NEERC 2014 Eastern Subregional
547
425
1507
Difficult Decision
NEERC 2006 Eastern Subregional
1060
441
1888
Pilot Work Experience
NEERC 2011 Eastern Subregional
698
444
1890
Money out of Thin Air
NEERC 2011 Eastern Subregional
694
447
1158
Censored!
NEERC 2001 Northern Subregional
964
502
2014
Zhenya moves from parents
NEERC 2014 Eastern Subregional
444
522
1997
Those are not the droids you're looking for
NEERC 2013 Eastern Subregional
487
526
1056
Centers of the Net
NEERC 2000 Central Subregional
2693
544
1721
Two Sides of the Same Coin
NEERC 2009 Eastern Subregional
649
568
1809
Chapaev and Potatoes
NEERC 2010 Eastern Subregional
585
576
1995
Illegal spices
NEERC 2013 Eastern Subregional
444
576
1592
Chinese Watches
NEERC 2007 Eastern Subregional
718
600
1713
Key Substrings
NEERC 2009 Eastern Subregional
597
617
1500
Pass Licenses
NEERC 2006 Eastern Subregional
734
634
1054
Tower of Hanoi
NEERC 2000 Central Subregional
2282
642
1659
Regular Triangles
NEERC 2008 Eastern Subregional
619
642
1059
Expression
NEERC 2000 Central Subregional
2211
663
1891
Language Ocean
NEERC 2011 Eastern Subregional
457
674
1920
Titan Ruins: the Infinite Power of Magic
NEERC 2012 Eastern Subregional
406
692
1274
Fractional Arithmetic
NEERC 2003 Central Subregional
710
696
1057
Amount of Degrees
NEERC 2000 Central Subregional
2052
714
1803
The Czechs' Rifles
NEERC 2010 Eastern Subregional
465
722
1276
Train
NEERC 2003 Central Subregional
675
732
1159
Fence
NEERC 2001 Northern Subregional
643
749
1230
Introspective Program
NEERC 2002 Central Subregional
645
756
1716
Alternative Solution
NEERC 2009 Eastern Subregional
485
756
1277
Cops and Thieves
NEERC 2003 Central Subregional
626
788
1587
Flying Pig
NEERC 2007 Eastern Subregional
534
803
1892
Morning in Koltsovo
NEERC 2011 Eastern Subregional
356
860
1918
Titan Ruins: Artful Manipulations
NEERC 2012 Eastern Subregional
309
903
2013
Neither shaken nor stirred
NEERC 2014 Eastern Subregional
251
908
1165
Subnumber
NEERC 2001 Northern Subregional
525
914
2074
Timus problems classifier
Qualification of Eastern Subregional 2015
205
947
1805
Chapaev and a Cipher Grille
NEERC 2010 Eastern Subregional
343
971
1720
Summit Online Judge
NEERC 2009 Eastern Subregional
374
975
1278
“… Connecting People”
NEERC 2003 Central Subregional
501
981
1715
Another Ball Killer
NEERC 2009 Eastern Subregional
365
998
1990
Podracing
NEERC 2013 Eastern Subregional
249
1009
1994
The Emperor's plan
NEERC 2013 Eastern Subregional
247
1017
1887
Frequent Flyer Card
NEERC 2011 Eastern Subregional
292
1042
1591
Abstract Thinking
NEERC 2007 Eastern Subregional
404
1055
1996
Cipher Message 3
NEERC 2013 Eastern Subregional
209
1193
1912
Titan Ruins: Passing through Walls
NEERC 2012 Eastern Subregional
228
1210
2017
Best of a bad lot
NEERC 2014 Eastern Subregional
173
1295
1584
Pharaohs’ Secrets
NEERC 2007 Eastern Subregional
316
1340
1281
River Basin
NEERC 2003 Central Subregional
349
1396
1807
Cartridges for Maxim
NEERC 2010 Eastern Subregional
231
1423
1719
Kill the Shaitan-Boss
NEERC 2009 Eastern Subregional
241
1491
1657
Cube Snake
NEERC 2008 Eastern Subregional
259
1500
1894
Non-Flying Weather
NEERC 2011 Eastern Subregional
199
1505
1508
Japanese Puzzle
NEERC 2006 Eastern Subregional
277
1643
1503
Polynomial
NEERC 2006 Eastern Subregional
260
1747
1913
Titan Ruins: Alignment of Forces
NEERC 2012 Eastern Subregional
149
1811
1655
Somali Pirates
NEERC 2008 Eastern Subregional
207
1859
1583
Cheese
NEERC 2007 Eastern Subregional
222
1883
1808
Chapaev at the Planet Ocean
NEERC 2010 Eastern Subregional
171
1895
1919
Titan Ruins: Transformation of Cylinders
NEERC 2012 Eastern Subregional
134
2000
1886
Trip 2
NEERC 2011 Eastern Subregional
144
2043
1802
Cube Puzzle
NEERC 2010 Eastern Subregional
157
2053
1895
Steaks on Board
NEERC 2011 Eastern Subregional
140
2097
1231
Turing: One, Two, Three, …
NEERC 2002 Central Subregional
222
2133
1717
Eligibility Rules
NEERC 2009 Eastern Subregional
164
2151
1504
Good Manners
NEERC 2006 Eastern Subregional
202
2225
1232
Asteroid Landing
NEERC 2002 Central Subregional
202
2335
1275
Knights of the Round Table
NEERC 2003 Central Subregional
199
2398
1652
Banking Crisis
NEERC 2008 Eastern Subregional
139
2708
2075
Take care of your eyebrows!
Qualification of Eastern Subregional 2015
64
2753
1058
Chocolate
NEERC 2000 Central Subregional
518
2780
1505
Oil Transfer
NEERC 2006 Eastern Subregional
153
2894
1714
Mnemonics and Palindromes 2
NEERC 2009 Eastern Subregional
110
3119
1916
Titan Ruins: Waiting for Stability
NEERC 2012 Eastern Subregional
80
3200
1509
Domino Recognition
NEERC 2006 Eastern Subregional
125
3494
1166
Funny Card Game
NEERC 2001 Northern Subregional
133
3503
2022
Riding a Toad
NEERC 2014 Eastern Subregional
57
3537
1163
Chapaev
NEERC 2001 Northern Subregional
104
4290
1914
Titan Ruins: Serial Control
NEERC 2012 Eastern Subregional
57
4298
1911
Titan Ruins: Overtaking Fire
NEERC 2012 Eastern Subregional
55
4430
1801
The Revolution Cup
NEERC 2010 Eastern Subregional
52
5531
1999
The secret module
NEERC 2013 Eastern Subregional
29
6699
1653
Death Conveyor
NEERC 2008 Eastern Subregional
50
6725
1649
Abstractionism to the People
NEERC 2008 Eastern Subregional
48
6957
2077
Reductions
Qualification of Eastern Subregional 2015
18
7275
2076
Vasiana
Qualification of Eastern Subregional 2015
16
7835
2016
Magic and Science
NEERC 2014 Eastern Subregional
18
8462
1589
Sokoban
NEERC 2007 Eastern Subregional
14
18203
Solved problems:
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