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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
4400
335
1054
Tower of Hanoi
NEERC 2000 Central Subregional
2311
637
1055
Combinations
NEERC 2000 Central Subregional
3568
413
1056
Centers of the Net
NEERC 2000 Central Subregional
2704
545
1057
Amount of Degrees
NEERC 2000 Central Subregional
2083
706
1058
Chocolate
NEERC 2000 Central Subregional
519
2788
1059
Expression
NEERC 2000 Central Subregional
2214
665
1133
Fibonacci Sequence
NEERC 2001 Central Subregional
2197
222
1134
Cards
NEERC 2001 Central Subregional
2519
194
1135
Recruits
NEERC 2001 Central Subregional
3034
161
1136
Parliament
NEERC 2001 Central Subregional
4944
99
1137
Bus Routes
NEERC 2001 Central Subregional
1503
324
1138
Integer Percentage
NEERC 2001 Central Subregional
2433
201
1139
City Blocks
NEERC 2001 Central Subregional
6350
77
1140
Swamp Incident
NEERC 2001 Central Subregional
1298
375
1158
Censored!
NEERC 2001 Northern Subregional
965
504
1159
Fence
NEERC 2001 Northern Subregional
647
748
1160
Network
NEERC 2001 Northern Subregional
3256
152
1161
Stripies
NEERC 2001 Northern Subregional
5385
91
1162
Currency Exchange
NEERC 2001 Northern Subregional
2338
209
1163
Chapaev
NEERC 2001 Northern Subregional
105
4271
1164
Fillword
NEERC 2001 Northern Subregional
2405
203
1165
Subnumber
NEERC 2001 Northern Subregional
526
916
1166
Funny Card Game
NEERC 2001 Northern Subregional
132
3542
1224
Spiral
NEERC 2002 Central Subregional
7508
66
1225
Flags
NEERC 2002 Central Subregional
13996
35
1226
esreveR redrO
NEERC 2002 Central Subregional
4396
113
1227
Rally Championship
NEERC 2002 Central Subregional
1652
299
1228
Array
NEERC 2002 Central Subregional
4637
107
1229
Strong Brickwork
NEERC 2002 Central Subregional
1300
379
1230
Introspective Program
NEERC 2002 Central Subregional
649
754
1231
Turing: One, Two, Three, …
NEERC 2002 Central Subregional
222
2142
1232
Asteroid Landing
NEERC 2002 Central Subregional
202
2345
1274
Fractional Arithmetic
NEERC 2003 Central Subregional
720
690
1275
Knights of the Round Table
NEERC 2003 Central Subregional
200
2397
1276
Train
NEERC 2003 Central Subregional
677
733
1277
Cops and Thieves
NEERC 2003 Central Subregional
626
791
1278
“… Connecting People”
NEERC 2003 Central Subregional
502
983
1279
Warehouse
NEERC 2003 Central Subregional
1185
421
1280
Topological Sorting
NEERC 2003 Central Subregional
3540
142
1281
River Basin
NEERC 2003 Central Subregional
349
1402
1282
Game Tree
NEERC 2003 Central Subregional
1487
336
1500
Pass Licenses
NEERC 2006 Eastern Subregional
737
634
1501
Sense of Beauty
NEERC 2006 Eastern Subregional
1778
265
1502
Domino Dots
NEERC 2006 Eastern Subregional
6448
73
1503
Polynomial
NEERC 2006 Eastern Subregional
261
1749
1504
Good Manners
NEERC 2006 Eastern Subregional
203
2225
1505
Oil Transfer
NEERC 2006 Eastern Subregional
153
2907
1506
Columns of Numbers
NEERC 2006 Eastern Subregional
3343
141
1507
Difficult Decision
NEERC 2006 Eastern Subregional
1064
441
1508
Japanese Puzzle
NEERC 2006 Eastern Subregional
278
1645
1509
Domino Recognition
NEERC 2006 Eastern Subregional
125
3510
1510
Order
NEERC 2006 Eastern Subregional
5457
87
1582
Bookmakers
NEERC 2007 Eastern Subregional
3635
121
1583
Cheese
NEERC 2007 Eastern Subregional
224
1877
1584
Pharaohs’ Secrets
NEERC 2007 Eastern Subregional
315
1351
1585
Penguins
NEERC 2007 Eastern Subregional
11573
38
1586
Threeprime Numbers
NEERC 2007 Eastern Subregional
3033
144
1587
Flying Pig
NEERC 2007 Eastern Subregional
534
807
1588
Jamaica
NEERC 2007 Eastern Subregional
1352
322
1589
Sokoban
NEERC 2007 Eastern Subregional
15
17568
1590
Bacon’s Cipher
NEERC 2007 Eastern Subregional
2302
190
1591
Abstract Thinking
NEERC 2007 Eastern Subregional
405
1058
1592
Chinese Watches
NEERC 2007 Eastern Subregional
723
599
1649
Abstractionism to the People
NEERC 2008 Eastern Subregional
48
7000
1650
Billionaires
NEERC 2008 Eastern Subregional
2098
193
1651
Shortest Subchain
NEERC 2008 Eastern Subregional
1172
343
1652
Banking Crisis
NEERC 2008 Eastern Subregional
139
2725
1653
Death Conveyor
NEERC 2008 Eastern Subregional
50
6766
1654
Cipher Message
NEERC 2008 Eastern Subregional
6936
58
1655
Somali Pirates
NEERC 2008 Eastern Subregional
206
1880
1656
Far Away Kingdom's Army
NEERC 2008 Eastern Subregional
1999
202
1657
Cube Snake
NEERC 2008 Eastern Subregional
259
1509
1658
Sum of Digits
NEERC 2008 Eastern Subregional
2039
198
1659
Regular Triangles
NEERC 2008 Eastern Subregional
622
642
1711
Code Names
NEERC 2009 Eastern Subregional
2879
130
1712
Cipher Grille
NEERC 2009 Eastern Subregional
4526
83
1713
Key Substrings
NEERC 2009 Eastern Subregional
599
619
1714
Mnemonics and Palindromes 2
NEERC 2009 Eastern Subregional
109
3167
1715
Another Ball Killer
NEERC 2009 Eastern Subregional
365
1005
1716
Alternative Solution
NEERC 2009 Eastern Subregional
487
758
1717
Eligibility Rules
NEERC 2009 Eastern Subregional
163
2178
1718
Rejudge
NEERC 2009 Eastern Subregional
1244
300
1719
Kill the Shaitan-Boss
NEERC 2009 Eastern Subregional
241
1501
1720
Summit Online Judge
NEERC 2009 Eastern Subregional
376
976
1721
Two Sides of the Same Coin
NEERC 2009 Eastern Subregional
650
571
1800
Murphy's Law
NEERC 2010 Eastern Subregional
2032
169
1801
The Revolution Cup
NEERC 2010 Eastern Subregional
52
5575
1802
Cube Puzzle
NEERC 2010 Eastern Subregional
156
2082
1803
The Czechs' Rifles
NEERC 2010 Eastern Subregional
467
725
1804
The Machinegunners in a Playoff
NEERC 2010 Eastern Subregional
867
394
1805
Chapaev and a Cipher Grille
NEERC 2010 Eastern Subregional
344
976
1806
Mobile Telegraphs
NEERC 2010 Eastern Subregional
1713
201
1807
Cartridges for Maxim
NEERC 2010 Eastern Subregional
230
1440
1808
Chapaev at the Planet Ocean
NEERC 2010 Eastern Subregional
171
1910
1809
Chapaev and Potatoes
NEERC 2010 Eastern Subregional
587
579
1885
Passenger Comfort
NEERC 2011 Eastern Subregional
1603
197
1886
Trip 2
NEERC 2011 Eastern Subregional
144
2061
1887
Frequent Flyer Card
NEERC 2011 Eastern Subregional
292
1051
1888
Pilot Work Experience
NEERC 2011 Eastern Subregional
698
448
1889
Airport Announcements
NEERC 2011 Eastern Subregional
1074
293
1890
Money out of Thin Air
NEERC 2011 Eastern Subregional
695
450
1891
Language Ocean
NEERC 2011 Eastern Subregional
458
678
1892
Morning in Koltsovo
NEERC 2011 Eastern Subregional
357
865
1893
A380
NEERC 2011 Eastern Subregional
5520
57
1894
Non-Flying Weather
NEERC 2011 Eastern Subregional
200
1512
1895
Steaks on Board
NEERC 2011 Eastern Subregional
139
2131
1910
Titan Ruins: Hidden Entrance
NEERC 2012 Eastern Subregional
8820
33
1911
Titan Ruins: Overtaking Fire
NEERC 2012 Eastern Subregional
55
4476
1912
Titan Ruins: Passing through Walls
NEERC 2012 Eastern Subregional
227
1228
1913
Titan Ruins: Alignment of Forces
NEERC 2012 Eastern Subregional
149
1830
1914
Titan Ruins: Serial Control
NEERC 2012 Eastern Subregional
57
4342
1915
Titan Ruins: Reconstruction of Bygones
NEERC 2012 Eastern Subregional
1371
211
1916
Titan Ruins: Waiting for Stability
NEERC 2012 Eastern Subregional
80
3232
1917
Titan Ruins: Deadly Accuracy
NEERC 2012 Eastern Subregional
1272
227
1918
Titan Ruins: Artful Manipulations
NEERC 2012 Eastern Subregional
308
915
1919
Titan Ruins: Transformation of Cylinders
NEERC 2012 Eastern Subregional
134
2020
1920
Titan Ruins: the Infinite Power of Magic
NEERC 2012 Eastern Subregional
407
698
1990
Podracing
NEERC 2013 Eastern Subregional
248
1025
1991
The battle near the swamp
NEERC 2013 Eastern Subregional
5788
46
1992
CVS
NEERC 2013 Eastern Subregional
696
374
1993
This cheeseburger you don't need
NEERC 2013 Eastern Subregional
1353
194
1994
The Emperor's plan
NEERC 2013 Eastern Subregional
247
1029
1995
Illegal spices
NEERC 2013 Eastern Subregional
444
582
1996
Cipher Message 3
NEERC 2013 Eastern Subregional
208
1213
1997
Those are not the droids you're looking for
NEERC 2013 Eastern Subregional
488
531
1998
The old Padawan
NEERC 2013 Eastern Subregional
738
353
1999
The secret module
NEERC 2013 Eastern Subregional
29
6778
2012
About Grisha N.
NEERC 2014 Eastern Subregional
14716
16
2013
Neither shaken nor stirred
NEERC 2014 Eastern Subregional
251
920
2014
Zhenya moves from parents
NEERC 2014 Eastern Subregional
446
527
2015
Zhenya moves from the dormitory
NEERC 2014 Eastern Subregional
825
288
2016
Magic and Science
NEERC 2014 Eastern Subregional
19
8280
2017
Best of a bad lot
NEERC 2014 Eastern Subregional
175
1298
2018
The Debut Album
NEERC 2014 Eastern Subregional
2378
101
2019
Pair: normal and paranormal
NEERC 2014 Eastern Subregional
868
273
2020
Traffic Jam in Flower Town
NEERC 2014 Eastern Subregional
1594
150
2021
Scarily interesting!
NEERC 2014 Eastern Subregional
547
431
2022
Riding a Toad
NEERC 2014 Eastern Subregional
57
3584
2023
Donald is a postman
NEERC 2014 Eastern Subregional
6431
37
2074
Timus problems classifier
Qualification of Eastern Subregional 2015
207
954
2075
Take care of your eyebrows!
Qualification of Eastern Subregional 2015
64
2797
2076
Vasiana
Qualification of Eastern Subregional 2015
16
7962
2077
Reductions
Qualification of Eastern Subregional 2015
17
7667
Solved problems:
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