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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
14630
16
1910
Titan Ruins: Hidden Entrance
NEERC 2012 Eastern Subregional
8789
33
1225
Flags
NEERC 2002 Central Subregional
13970
35
2023
Donald is a postman
NEERC 2014 Eastern Subregional
6402
37
1585
Penguins
NEERC 2007 Eastern Subregional
11542
38
1991
The battle near the swamp
NEERC 2013 Eastern Subregional
5769
45
1893
A380
NEERC 2011 Eastern Subregional
5513
57
1654
Cipher Message
NEERC 2008 Eastern Subregional
6926
58
1224
Spiral
NEERC 2002 Central Subregional
7503
66
1502
Domino Dots
NEERC 2006 Eastern Subregional
6444
73
1139
City Blocks
NEERC 2001 Central Subregional
6345
77
1712
Cipher Grille
NEERC 2009 Eastern Subregional
4520
83
1510
Order
NEERC 2006 Eastern Subregional
5449
87
1161
Stripies
NEERC 2001 Northern Subregional
5379
91
1136
Parliament
NEERC 2001 Central Subregional
4938
99
2018
The Debut Album
NEERC 2014 Eastern Subregional
2347
101
1228
Array
NEERC 2002 Central Subregional
4632
107
1226
esreveR redrO
NEERC 2002 Central Subregional
4393
113
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
3340
141
1280
Topological Sorting
NEERC 2003 Central Subregional
3536
142
1586
Threeprime Numbers
NEERC 2007 Eastern Subregional
3028
144
2020
Traffic Jam in Flower Town
NEERC 2014 Eastern Subregional
1594
149
1160
Network
NEERC 2001 Northern Subregional
3190
155
1135
Recruits
NEERC 2001 Central Subregional
3031
161
1800
Murphy's Law
NEERC 2010 Eastern Subregional
2030
169
1590
Bacon’s Cipher
NEERC 2007 Eastern Subregional
2293
190
1993
This cheeseburger you don't need
NEERC 2013 Eastern Subregional
1352
193
1134
Cards
NEERC 2001 Central Subregional
2512
194
1885
Passenger Comfort
NEERC 2011 Eastern Subregional
1599
196
1650
Billionaires
NEERC 2008 Eastern Subregional
2046
197
1658
Sum of Digits
NEERC 2008 Eastern Subregional
2037
198
1138
Integer Percentage
NEERC 2001 Central Subregional
2433
200
1656
Far Away Kingdom's Army
NEERC 2008 Eastern Subregional
1997
202
1164
Fillword
NEERC 2001 Northern Subregional
2403
203
1806
Mobile Telegraphs
NEERC 2010 Eastern Subregional
1649
208
1915
Titan Ruins: Reconstruction of Bygones
NEERC 2012 Eastern Subregional
1371
210
1133
Fibonacci Sequence
NEERC 2001 Central Subregional
2194
222
1162
Currency Exchange
NEERC 2001 Northern Subregional
2176
224
1917
Titan Ruins: Deadly Accuracy
NEERC 2012 Eastern Subregional
1271
226
1501
Sense of Beauty
NEERC 2006 Eastern Subregional
1776
265
2019
Pair: normal and paranormal
NEERC 2014 Eastern Subregional
867
272
2015
Zhenya moves from the dormitory
NEERC 2014 Eastern Subregional
822
287
1889
Airport Announcements
NEERC 2011 Eastern Subregional
1073
292
1227
Rally Championship
NEERC 2002 Central Subregional
1648
299
1718
Rejudge
NEERC 2009 Eastern Subregional
1243
300
1588
Jamaica
NEERC 2007 Eastern Subregional
1352
322
1137
Bus Routes
NEERC 2001 Central Subregional
1493
326
1053
Pinocchio
NEERC 2000 Central Subregional
4397
335
1282
Game Tree
NEERC 2003 Central Subregional
1486
336
1651
Shortest Subchain
NEERC 2008 Eastern Subregional
1165
345
1998
The old Padawan
NEERC 2013 Eastern Subregional
737
352
1992
CVS
NEERC 2013 Eastern Subregional
695
373
1140
Swamp Incident
NEERC 2001 Central Subregional
1294
375
1229
Strong Brickwork
NEERC 2002 Central Subregional
1299
379
1804
The Machinegunners in a Playoff
NEERC 2010 Eastern Subregional
865
394
1055
Combinations
NEERC 2000 Central Subregional
3555
414
1279
Warehouse
NEERC 2003 Central Subregional
1183
421
2021
Scarily interesting!
NEERC 2014 Eastern Subregional
547
428
1507
Difficult Decision
NEERC 2006 Eastern Subregional
1062
441
1888
Pilot Work Experience
NEERC 2011 Eastern Subregional
697
447
1890
Money out of Thin Air
NEERC 2011 Eastern Subregional
694
449
1158
Censored!
NEERC 2001 Northern Subregional
964
503
2014
Zhenya moves from parents
NEERC 2014 Eastern Subregional
446
523
1997
Those are not the droids you're looking for
NEERC 2013 Eastern Subregional
486
530
1056
Centers of the Net
NEERC 2000 Central Subregional
2697
545
1721
Two Sides of the Same Coin
NEERC 2009 Eastern Subregional
649
570
1809
Chapaev and Potatoes
NEERC 2010 Eastern Subregional
584
580
1995
Illegal spices
NEERC 2013 Eastern Subregional
443
580
1592
Chinese Watches
NEERC 2007 Eastern Subregional
720
600
1713
Key Substrings
NEERC 2009 Eastern Subregional
597
619
1500
Pass Licenses
NEERC 2006 Eastern Subregional
737
633
1054
Tower of Hanoi
NEERC 2000 Central Subregional
2305
637
1659
Regular Triangles
NEERC 2008 Eastern Subregional
622
641
1059
Expression
NEERC 2000 Central Subregional
2212
664
1891
Language Ocean
NEERC 2011 Eastern Subregional
457
677
1920
Titan Ruins: the Infinite Power of Magic
NEERC 2012 Eastern Subregional
405
698
1274
Fractional Arithmetic
NEERC 2003 Central Subregional
709
699
1057
Amount of Degrees
NEERC 2000 Central Subregional
2074
708
1803
The Czechs' Rifles
NEERC 2010 Eastern Subregional
466
723
1276
Train
NEERC 2003 Central Subregional
674
734
1159
Fence
NEERC 2001 Northern Subregional
644
750
1230
Introspective Program
NEERC 2002 Central Subregional
645
757
1716
Alternative Solution
NEERC 2009 Eastern Subregional
485
759
1277
Cops and Thieves
NEERC 2003 Central Subregional
625
791
1587
Flying Pig
NEERC 2007 Eastern Subregional
533
807
1892
Morning in Koltsovo
NEERC 2011 Eastern Subregional
356
864
1918
Titan Ruins: Artful Manipulations
NEERC 2012 Eastern Subregional
308
910
2013
Neither shaken nor stirred
NEERC 2014 Eastern Subregional
251
914
1165
Subnumber
NEERC 2001 Northern Subregional
524
918
2074
Timus problems classifier
Qualification of Eastern Subregional 2015
206
951
1805
Chapaev and a Cipher Grille
NEERC 2010 Eastern Subregional
344
973
1720
Summit Online Judge
NEERC 2009 Eastern Subregional
375
976
1278
“… Connecting People”
NEERC 2003 Central Subregional
501
983
1715
Another Ball Killer
NEERC 2009 Eastern Subregional
364
1004
1990
Podracing
NEERC 2013 Eastern Subregional
248
1019
1994
The Emperor's plan
NEERC 2013 Eastern Subregional
246
1027
1887
Frequent Flyer Card
NEERC 2011 Eastern Subregional
291
1050
1591
Abstract Thinking
NEERC 2007 Eastern Subregional
405
1056
1996
Cipher Message 3
NEERC 2013 Eastern Subregional
208
1206
1912
Titan Ruins: Passing through Walls
NEERC 2012 Eastern Subregional
227
1222
2017
Best of a bad lot
NEERC 2014 Eastern Subregional
174
1297
1584
Pharaohs’ Secrets
NEERC 2007 Eastern Subregional
315
1348
1281
River Basin
NEERC 2003 Central Subregional
348
1403
1807
Cartridges for Maxim
NEERC 2010 Eastern Subregional
230
1435
1719
Kill the Shaitan-Boss
NEERC 2009 Eastern Subregional
241
1496
1657
Cube Snake
NEERC 2008 Eastern Subregional
259
1505
1894
Non-Flying Weather
NEERC 2011 Eastern Subregional
199
1513
1508
Japanese Puzzle
NEERC 2006 Eastern Subregional
277
1648
1503
Polynomial
NEERC 2006 Eastern Subregional
260
1751
1913
Titan Ruins: Alignment of Forces
NEERC 2012 Eastern Subregional
149
1821
1655
Somali Pirates
NEERC 2008 Eastern Subregional
206
1874
1583
Cheese
NEERC 2007 Eastern Subregional
223
1880
1808
Chapaev at the Planet Ocean
NEERC 2010 Eastern Subregional
171
1903
1919
Titan Ruins: Transformation of Cylinders
NEERC 2012 Eastern Subregional
134
2011
1886
Trip 2
NEERC 2011 Eastern Subregional
144
2053
1802
Cube Puzzle
NEERC 2010 Eastern Subregional
156
2074
1895
Steaks on Board
NEERC 2011 Eastern Subregional
139
2122
1231
Turing: One, Two, Three, …
NEERC 2002 Central Subregional
221
2148
1717
Eligibility Rules
NEERC 2009 Eastern Subregional
163
2171
1504
Good Manners
NEERC 2006 Eastern Subregional
202
2230
1232
Asteroid Landing
NEERC 2002 Central Subregional
201
2351
1275
Knights of the Round Table
NEERC 2003 Central Subregional
199
2404
1652
Banking Crisis
NEERC 2008 Eastern Subregional
139
2717
1058
Chocolate
NEERC 2000 Central Subregional
517
2792
2075
Take care of your eyebrows!
Qualification of Eastern Subregional 2015
63
2815
1505
Oil Transfer
NEERC 2006 Eastern Subregional
153
2901
1714
Mnemonics and Palindromes 2
NEERC 2009 Eastern Subregional
109
3156
1916
Titan Ruins: Waiting for Stability
NEERC 2012 Eastern Subregional
79
3253
1509
Domino Recognition
NEERC 2006 Eastern Subregional
125
3503
1166
Funny Card Game
NEERC 2001 Northern Subregional
132
3535
2022
Riding a Toad
NEERC 2014 Eastern Subregional
56
3616
1163
Chapaev
NEERC 2001 Northern Subregional
103
4338
1914
Titan Ruins: Serial Control
NEERC 2012 Eastern Subregional
56
4387
1911
Titan Ruins: Overtaking Fire
NEERC 2012 Eastern Subregional
54
4524
1801
The Revolution Cup
NEERC 2010 Eastern Subregional
52
5554
1653
Death Conveyor
NEERC 2008 Eastern Subregional
50
6747
1999
The secret module
NEERC 2013 Eastern Subregional
28
6919
1649
Abstractionism to the People
NEERC 2008 Eastern Subregional
48
6980
2077
Reductions
Qualification of Eastern Subregional 2015
17
7610
2076
Vasiana
Qualification of Eastern Subregional 2015
16
7903
2016
Magic and Science
NEERC 2014 Eastern Subregional
18
8523
1589
Sokoban
NEERC 2007 Eastern Subregional
14
18255
Solved problems:
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