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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
14603
16
1910
Titan Ruins: Hidden Entrance
NEERC 2012 Eastern Subregional
8772
33
1225
Flags
NEERC 2002 Central Subregional
13957
35
2023
Donald is a postman
NEERC 2014 Eastern Subregional
6384
37
1585
Penguins
NEERC 2007 Eastern Subregional
11530
38
1991
The battle near the swamp
NEERC 2013 Eastern Subregional
5756
45
1893
A380
NEERC 2011 Eastern Subregional
5506
57
1654
Cipher Message
NEERC 2008 Eastern Subregional
6917
58
1224
Spiral
NEERC 2002 Central Subregional
7498
66
1502
Domino Dots
NEERC 2006 Eastern Subregional
6440
73
1139
City Blocks
NEERC 2001 Central Subregional
6343
77
1712
Cipher Grille
NEERC 2009 Eastern Subregional
4518
83
1510
Order
NEERC 2006 Eastern Subregional
5446
87
1161
Stripies
NEERC 2001 Northern Subregional
5377
91
1136
Parliament
NEERC 2001 Central Subregional
4934
99
2018
The Debut Album
NEERC 2014 Eastern Subregional
2341
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
3338
141
1280
Topological Sorting
NEERC 2003 Central Subregional
3517
142
1586
Threeprime Numbers
NEERC 2007 Eastern Subregional
3027
144
2020
Traffic Jam in Flower Town
NEERC 2014 Eastern Subregional
1594
148
1135
Recruits
NEERC 2001 Central Subregional
3032
161
1160
Network
NEERC 2001 Northern Subregional
3014
164
1800
Murphy's Law
NEERC 2010 Eastern Subregional
2029
169
1590
Bacon’s Cipher
NEERC 2007 Eastern Subregional
2293
190
1993
This cheeseburger you don't need
NEERC 2013 Eastern Subregional
1353
192
1134
Cards
NEERC 2001 Central Subregional
2513
194
1885
Passenger Comfort
NEERC 2011 Eastern Subregional
1599
196
1658
Sum of Digits
NEERC 2008 Eastern Subregional
2037
197
1138
Integer Percentage
NEERC 2001 Central Subregional
2432
200
1656
Far Away Kingdom's Army
NEERC 2008 Eastern Subregional
1994
202
1164
Fillword
NEERC 2001 Northern Subregional
2401
203
1915
Titan Ruins: Reconstruction of Bygones
NEERC 2012 Eastern Subregional
1370
209
1650
Billionaires
NEERC 2008 Eastern Subregional
1890
213
1133
Fibonacci Sequence
NEERC 2001 Central Subregional
2193
222
1806
Mobile Telegraphs
NEERC 2010 Eastern Subregional
1512
226
1917
Titan Ruins: Deadly Accuracy
NEERC 2012 Eastern Subregional
1269
226
1162
Currency Exchange
NEERC 2001 Northern Subregional
2129
229
1501
Sense of Beauty
NEERC 2006 Eastern Subregional
1776
264
2019
Pair: normal and paranormal
NEERC 2014 Eastern Subregional
867
271
2015
Zhenya moves from the dormitory
NEERC 2014 Eastern Subregional
821
286
1889
Airport Announcements
NEERC 2011 Eastern Subregional
1071
292
1227
Rally Championship
NEERC 2002 Central Subregional
1648
299
1718
Rejudge
NEERC 2009 Eastern Subregional
1244
299
1588
Jamaica
NEERC 2007 Eastern Subregional
1349
322
1137
Bus Routes
NEERC 2001 Central Subregional
1491
326
1053
Pinocchio
NEERC 2000 Central Subregional
4397
334
1282
Game Tree
NEERC 2003 Central Subregional
1485
336
1651
Shortest Subchain
NEERC 2008 Eastern Subregional
1164
344
1998
The old Padawan
NEERC 2013 Eastern Subregional
738
350
1992
CVS
NEERC 2013 Eastern Subregional
696
371
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
865
393
1055
Combinations
NEERC 2000 Central Subregional
3553
414
1279
Warehouse
NEERC 2003 Central Subregional
1183
421
2021
Scarily interesting!
NEERC 2014 Eastern Subregional
547
427
1507
Difficult Decision
NEERC 2006 Eastern Subregional
1062
441
1888
Pilot Work Experience
NEERC 2011 Eastern Subregional
698
446
1890
Money out of Thin Air
NEERC 2011 Eastern Subregional
695
447
1158
Censored!
NEERC 2001 Northern Subregional
964
503
2014
Zhenya moves from parents
NEERC 2014 Eastern Subregional
445
523
1997
Those are not the droids you're looking for
NEERC 2013 Eastern Subregional
487
527
1056
Centers of the Net
NEERC 2000 Central Subregional
2695
545
1721
Two Sides of the Same Coin
NEERC 2009 Eastern Subregional
650
568
1995
Illegal spices
NEERC 2013 Eastern Subregional
444
577
1809
Chapaev and Potatoes
NEERC 2010 Eastern Subregional
585
578
1592
Chinese Watches
NEERC 2007 Eastern Subregional
720
599
1713
Key Substrings
NEERC 2009 Eastern Subregional
597
618
1500
Pass Licenses
NEERC 2006 Eastern Subregional
736
633
1659
Regular Triangles
NEERC 2008 Eastern Subregional
621
641
1054
Tower of Hanoi
NEERC 2000 Central Subregional
2284
642
1059
Expression
NEERC 2000 Central Subregional
2211
663
1891
Language Ocean
NEERC 2011 Eastern Subregional
457
675
1920
Titan Ruins: the Infinite Power of Magic
NEERC 2012 Eastern Subregional
406
694
1274
Fractional Arithmetic
NEERC 2003 Central Subregional
710
697
1057
Amount of Degrees
NEERC 2000 Central Subregional
2053
714
1803
The Czechs' Rifles
NEERC 2010 Eastern Subregional
465
724
1276
Train
NEERC 2003 Central Subregional
675
733
1159
Fence
NEERC 2001 Northern Subregional
644
749
1230
Introspective Program
NEERC 2002 Central Subregional
645
757
1716
Alternative Solution
NEERC 2009 Eastern Subregional
485
757
1277
Cops and Thieves
NEERC 2003 Central Subregional
626
789
1587
Flying Pig
NEERC 2007 Eastern Subregional
534
804
1892
Morning in Koltsovo
NEERC 2011 Eastern Subregional
357
859
1918
Titan Ruins: Artful Manipulations
NEERC 2012 Eastern Subregional
309
905
2013
Neither shaken nor stirred
NEERC 2014 Eastern Subregional
251
911
1165
Subnumber
NEERC 2001 Northern Subregional
525
915
2074
Timus problems classifier
Qualification of Eastern Subregional 2015
207
943
1805
Chapaev and a Cipher Grille
NEERC 2010 Eastern Subregional
344
971
1720
Summit Online Judge
NEERC 2009 Eastern Subregional
374
976
1278
“… Connecting People”
NEERC 2003 Central Subregional
502
980
1715
Another Ball Killer
NEERC 2009 Eastern Subregional
365
1000
1990
Podracing
NEERC 2013 Eastern Subregional
249
1012
1994
The Emperor's plan
NEERC 2013 Eastern Subregional
247
1020
1887
Frequent Flyer Card
NEERC 2011 Eastern Subregional
292
1044
1591
Abstract Thinking
NEERC 2007 Eastern Subregional
405
1054
1996
Cipher Message 3
NEERC 2013 Eastern Subregional
209
1197
1912
Titan Ruins: Passing through Walls
NEERC 2012 Eastern Subregional
228
1213
2017
Best of a bad lot
NEERC 2014 Eastern Subregional
174
1293
1584
Pharaohs’ Secrets
NEERC 2007 Eastern Subregional
316
1342
1281
River Basin
NEERC 2003 Central Subregional
349
1398
1807
Cartridges for Maxim
NEERC 2010 Eastern Subregional
231
1426
1719
Kill the Shaitan-Boss
NEERC 2009 Eastern Subregional
242
1488
1657
Cube Snake
NEERC 2008 Eastern Subregional
260
1497
1894
Non-Flying Weather
NEERC 2011 Eastern Subregional
199
1509
1508
Japanese Puzzle
NEERC 2006 Eastern Subregional
278
1640
1503
Polynomial
NEERC 2006 Eastern Subregional
261
1743
1913
Titan Ruins: Alignment of Forces
NEERC 2012 Eastern Subregional
149
1816
1655
Somali Pirates
NEERC 2008 Eastern Subregional
207
1863
1583
Cheese
NEERC 2007 Eastern Subregional
223
1878
1808
Chapaev at the Planet Ocean
NEERC 2010 Eastern Subregional
171
1899
1919
Titan Ruins: Transformation of Cylinders
NEERC 2012 Eastern Subregional
135
1992
1886
Trip 2
NEERC 2011 Eastern Subregional
145
2035
1802
Cube Puzzle
NEERC 2010 Eastern Subregional
157
2058
1895
Steaks on Board
NEERC 2011 Eastern Subregional
140
2103
1231
Turing: One, Two, Three, …
NEERC 2002 Central Subregional
222
2136
1717
Eligibility Rules
NEERC 2009 Eastern Subregional
164
2155
1504
Good Manners
NEERC 2006 Eastern Subregional
203
2217
1232
Asteroid Landing
NEERC 2002 Central Subregional
202
2337
1275
Knights of the Round Table
NEERC 2003 Central Subregional
199
2401
1652
Banking Crisis
NEERC 2008 Eastern Subregional
139
2713
2075
Take care of your eyebrows!
Qualification of Eastern Subregional 2015
64
2765
1058
Chocolate
NEERC 2000 Central Subregional
518
2784
1505
Oil Transfer
NEERC 2006 Eastern Subregional
153
2897
1714
Mnemonics and Palindromes 2
NEERC 2009 Eastern Subregional
110
3125
1916
Titan Ruins: Waiting for Stability
NEERC 2012 Eastern Subregional
80
3209
1509
Domino Recognition
NEERC 2006 Eastern Subregional
125
3498
1166
Funny Card Game
NEERC 2001 Northern Subregional
133
3507
2022
Riding a Toad
NEERC 2014 Eastern Subregional
57
3550
1163
Chapaev
NEERC 2001 Northern Subregional
104
4295
1914
Titan Ruins: Serial Control
NEERC 2012 Eastern Subregional
57
4310
1911
Titan Ruins: Overtaking Fire
NEERC 2012 Eastern Subregional
55
4443
1801
The Revolution Cup
NEERC 2010 Eastern Subregional
52
5543
1653
Death Conveyor
NEERC 2008 Eastern Subregional
51
6626
1999
The secret module
NEERC 2013 Eastern Subregional
29
6721
1649
Abstractionism to the People
NEERC 2008 Eastern Subregional
49
6851
2077
Reductions
Qualification of Eastern Subregional 2015
18
7308
2076
Vasiana
Qualification of Eastern Subregional 2015
16
7870
2016
Magic and Science
NEERC 2014 Eastern Subregional
18
8494
1589
Sokoban
NEERC 2007 Eastern Subregional
14
18230
Solved problems:
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