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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
14618
16
1910
Titan Ruins: Hidden Entrance
NEERC 2012 Eastern Subregional
8786
33
1225
Flags
NEERC 2002 Central Subregional
13967
35
2023
Donald is a postman
NEERC 2014 Eastern Subregional
6393
37
1585
Penguins
NEERC 2007 Eastern Subregional
11541
38
1991
The battle near the swamp
NEERC 2013 Eastern Subregional
5766
45
1893
A380
NEERC 2011 Eastern Subregional
5511
57
1654
Cipher Message
NEERC 2008 Eastern Subregional
6925
58
1224
Spiral
NEERC 2002 Central Subregional
7500
66
1502
Domino Dots
NEERC 2006 Eastern Subregional
6443
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
5447
87
1161
Stripies
NEERC 2001 Northern Subregional
5377
91
1136
Parliament
NEERC 2001 Central Subregional
4936
99
2018
The Debut Album
NEERC 2014 Eastern Subregional
2345
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
2880
130
1506
Columns of Numbers
NEERC 2006 Eastern Subregional
3341
141
1280
Topological Sorting
NEERC 2003 Central Subregional
3536
142
1586
Threeprime Numbers
NEERC 2007 Eastern Subregional
3029
144
2020
Traffic Jam in Flower Town
NEERC 2014 Eastern Subregional
1594
149
1135
Recruits
NEERC 2001 Central Subregional
3032
161
1160
Network
NEERC 2001 Northern Subregional
3023
164
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
1353
193
1134
Cards
NEERC 2001 Central Subregional
2513
194
1885
Passenger Comfort
NEERC 2011 Eastern Subregional
1599
196
1650
Billionaires
NEERC 2008 Eastern Subregional
2035
198
1658
Sum of Digits
NEERC 2008 Eastern Subregional
2038
198
1138
Integer Percentage
NEERC 2001 Central Subregional
2434
200
1656
Far Away Kingdom's Army
NEERC 2008 Eastern Subregional
1997
202
1164
Fillword
NEERC 2001 Northern Subregional
2404
203
1915
Titan Ruins: Reconstruction of Bygones
NEERC 2012 Eastern Subregional
1371
209
1806
Mobile Telegraphs
NEERC 2010 Eastern Subregional
1578
217
1133
Fibonacci Sequence
NEERC 2001 Central Subregional
2195
222
1917
Titan Ruins: Deadly Accuracy
NEERC 2012 Eastern Subregional
1271
226
1162
Currency Exchange
NEERC 2001 Northern Subregional
2136
228
1501
Sense of Beauty
NEERC 2006 Eastern Subregional
1777
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
1649
299
1718
Rejudge
NEERC 2009 Eastern Subregional
1244
299
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
1487
335
1651
Shortest Subchain
NEERC 2008 Eastern Subregional
1166
344
1998
The old Padawan
NEERC 2013 Eastern Subregional
738
351
1992
CVS
NEERC 2013 Eastern Subregional
696
372
1140
Swamp Incident
NEERC 2001 Central Subregional
1295
375
1229
Strong Brickwork
NEERC 2002 Central Subregional
1299
379
1804
The Machinegunners in a Playoff
NEERC 2010 Eastern Subregional
866
393
1055
Combinations
NEERC 2000 Central Subregional
3556
414
1279
Warehouse
NEERC 2003 Central Subregional
1184
421
2021
Scarily interesting!
NEERC 2014 Eastern Subregional
548
427
1507
Difficult Decision
NEERC 2006 Eastern Subregional
1063
441
1888
Pilot Work Experience
NEERC 2011 Eastern Subregional
698
446
1890
Money out of Thin Air
NEERC 2011 Eastern Subregional
695
448
1158
Censored!
NEERC 2001 Northern Subregional
964
503
2014
Zhenya moves from parents
NEERC 2014 Eastern Subregional
447
522
1997
Those are not the droids you're looking for
NEERC 2013 Eastern Subregional
487
529
1056
Centers of the Net
NEERC 2000 Central Subregional
2695
545
1721
Two Sides of the Same Coin
NEERC 2009 Eastern Subregional
650
569
1809
Chapaev and Potatoes
NEERC 2010 Eastern Subregional
585
578
1995
Illegal spices
NEERC 2013 Eastern Subregional
444
579
1592
Chinese Watches
NEERC 2007 Eastern Subregional
721
599
1713
Key Substrings
NEERC 2009 Eastern Subregional
597
618
1500
Pass Licenses
NEERC 2006 Eastern Subregional
736
634
1659
Regular Triangles
NEERC 2008 Eastern Subregional
623
639
1054
Tower of Hanoi
NEERC 2000 Central Subregional
2292
641
1059
Expression
NEERC 2000 Central Subregional
2212
664
1891
Language Ocean
NEERC 2011 Eastern Subregional
458
675
1920
Titan Ruins: the Infinite Power of Magic
NEERC 2012 Eastern Subregional
406
695
1274
Fractional Arithmetic
NEERC 2003 Central Subregional
710
698
1057
Amount of Degrees
NEERC 2000 Central Subregional
2060
712
1803
The Czechs' Rifles
NEERC 2010 Eastern Subregional
467
721
1276
Train
NEERC 2003 Central Subregional
675
733
1159
Fence
NEERC 2001 Northern Subregional
645
748
1230
Introspective Program
NEERC 2002 Central Subregional
646
756
1716
Alternative Solution
NEERC 2009 Eastern Subregional
485
758
1277
Cops and Thieves
NEERC 2003 Central Subregional
626
790
1587
Flying Pig
NEERC 2007 Eastern Subregional
534
805
1892
Morning in Koltsovo
NEERC 2011 Eastern Subregional
357
861
1918
Titan Ruins: Artful Manipulations
NEERC 2012 Eastern Subregional
309
907
2013
Neither shaken nor stirred
NEERC 2014 Eastern Subregional
252
910
1165
Subnumber
NEERC 2001 Northern Subregional
525
916
2074
Timus problems classifier
Qualification of Eastern Subregional 2015
207
946
1805
Chapaev and a Cipher Grille
NEERC 2010 Eastern Subregional
345
969
1720
Summit Online Judge
NEERC 2009 Eastern Subregional
375
975
1278
“… Connecting People”
NEERC 2003 Central Subregional
502
981
1715
Another Ball Killer
NEERC 2009 Eastern Subregional
365
1001
1990
Podracing
NEERC 2013 Eastern Subregional
249
1014
1994
The Emperor's plan
NEERC 2013 Eastern Subregional
247
1022
1887
Frequent Flyer Card
NEERC 2011 Eastern Subregional
292
1046
1591
Abstract Thinking
NEERC 2007 Eastern Subregional
406
1053
1996
Cipher Message 3
NEERC 2013 Eastern Subregional
209
1199
1912
Titan Ruins: Passing through Walls
NEERC 2012 Eastern Subregional
228
1216
2017
Best of a bad lot
NEERC 2014 Eastern Subregional
175
1289
1584
Pharaohs’ Secrets
NEERC 2007 Eastern Subregional
316
1343
1281
River Basin
NEERC 2003 Central Subregional
349
1399
1807
Cartridges for Maxim
NEERC 2010 Eastern Subregional
231
1428
1719
Kill the Shaitan-Boss
NEERC 2009 Eastern Subregional
242
1490
1657
Cube Snake
NEERC 2008 Eastern Subregional
260
1499
1894
Non-Flying Weather
NEERC 2011 Eastern Subregional
200
1504
1508
Japanese Puzzle
NEERC 2006 Eastern Subregional
278
1641
1503
Polynomial
NEERC 2006 Eastern Subregional
261
1744
1913
Titan Ruins: Alignment of Forces
NEERC 2012 Eastern Subregional
150
1808
1655
Somali Pirates
NEERC 2008 Eastern Subregional
207
1865
1583
Cheese
NEERC 2007 Eastern Subregional
224
1872
1808
Chapaev at the Planet Ocean
NEERC 2010 Eastern Subregional
172
1891
1919
Titan Ruins: Transformation of Cylinders
NEERC 2012 Eastern Subregional
135
1995
1886
Trip 2
NEERC 2011 Eastern Subregional
145
2038
1802
Cube Puzzle
NEERC 2010 Eastern Subregional
157
2061
1895
Steaks on Board
NEERC 2011 Eastern Subregional
140
2106
1231
Turing: One, Two, Three, …
NEERC 2002 Central Subregional
222
2138
1717
Eligibility Rules
NEERC 2009 Eastern Subregional
164
2157
1504
Good Manners
NEERC 2006 Eastern Subregional
203
2219
1232
Asteroid Landing
NEERC 2002 Central Subregional
202
2339
1275
Knights of the Round Table
NEERC 2003 Central Subregional
200
2392
1652
Banking Crisis
NEERC 2008 Eastern Subregional
140
2698
2075
Take care of your eyebrows!
Qualification of Eastern Subregional 2015
64
2773
1058
Chocolate
NEERC 2000 Central Subregional
518
2786
1505
Oil Transfer
NEERC 2006 Eastern Subregional
154
2882
1714
Mnemonics and Palindromes 2
NEERC 2009 Eastern Subregional
110
3128
1916
Titan Ruins: Waiting for Stability
NEERC 2012 Eastern Subregional
80
3215
1509
Domino Recognition
NEERC 2006 Eastern Subregional
126
3476
1166
Funny Card Game
NEERC 2001 Northern Subregional
133
3509
2022
Riding a Toad
NEERC 2014 Eastern Subregional
57
3558
1163
Chapaev
NEERC 2001 Northern Subregional
104
4298
1914
Titan Ruins: Serial Control
NEERC 2012 Eastern Subregional
57
4318
1911
Titan Ruins: Overtaking Fire
NEERC 2012 Eastern Subregional
55
4451
1801
The Revolution Cup
NEERC 2010 Eastern Subregional
52
5551
1653
Death Conveyor
NEERC 2008 Eastern Subregional
51
6633
1999
The secret module
NEERC 2013 Eastern Subregional
29
6735
1649
Abstractionism to the People
NEERC 2008 Eastern Subregional
49
6858
2077
Reductions
Qualification of Eastern Subregional 2015
18
7329
2076
Vasiana
Qualification of Eastern Subregional 2015
16
7893
2016
Magic and Science
NEERC 2014 Eastern Subregional
18
8514
1589
Sokoban
NEERC 2007 Eastern Subregional
14
18247
Solved problems:
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