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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
4321
326
1054
Tower of Hanoi
NEERC 2000 Central Subregional
2170
648
1055
Combinations
NEERC 2000 Central Subregional
3482
405
1056
Centers of the Net
NEERC 2000 Central Subregional
2622
537
1057
Amount of Degrees
NEERC 2000 Central Subregional
1994
705
1058
Chocolate
NEERC 2000 Central Subregional
493
2802
1059
Expression
NEERC 2000 Central Subregional
2177
646
1133
Fibonacci Sequence
NEERC 2001 Central Subregional
2126
220
1134
Cards
NEERC 2001 Central Subregional
2423
193
1135
Recruits
NEERC 2001 Central Subregional
2865
163
1136
Parliament
NEERC 2001 Central Subregional
4722
99
1137
Bus Routes
NEERC 2001 Central Subregional
1366
341
1138
Integer Percentage
NEERC 2001 Central Subregional
2343
200
1139
City Blocks
NEERC 2001 Central Subregional
6061
77
1140
Swamp Incident
NEERC 2001 Central Subregional
1255
371
1158
Censored!
NEERC 2001 Northern Subregional
929
501
1159
Fence
NEERC 2001 Northern Subregional
630
735
1160
Network
NEERC 2001 Northern Subregional
2392
199
1161
Stripies
NEERC 2001 Northern Subregional
5152
91
1162
Currency Exchange
NEERC 2001 Northern Subregional
1606
291
1163
Chapaev
NEERC 2001 Northern Subregional
235
1919
1164
Fillword
NEERC 2001 Northern Subregional
2337
200
1165
Subnumber
NEERC 2001 Northern Subregional
518
890
1166
Funny Card Game
NEERC 2001 Northern Subregional
128
3496
1224
Spiral
NEERC 2002 Central Subregional
7103
67
1225
Flags
NEERC 2002 Central Subregional
13048
36
1226
esreveR redrO
NEERC 2002 Central Subregional
4279
111
1227
Rally Championship
NEERC 2002 Central Subregional
1553
305
1228
Array
NEERC 2002 Central Subregional
4525
105
1229
Strong Brickwork
NEERC 2002 Central Subregional
1260
375
1230
Introspective Program
NEERC 2002 Central Subregional
630
744
1231
Turing: One, Two, Three, …
NEERC 2002 Central Subregional
213
2136
1232
Asteroid Landing
NEERC 2002 Central Subregional
190
2381
1274
Fractional Arithmetic
NEERC 2003 Central Subregional
693
687
1275
Knights of the Round Table
NEERC 2003 Central Subregional
189
2426
1276
Train
NEERC 2003 Central Subregional
619
768
1277
Cops and Thieves
NEERC 2003 Central Subregional
608
781
1278
“… Connecting People”
NEERC 2003 Central Subregional
487
971
1279
Warehouse
NEERC 2003 Central Subregional
1154
415
1280
Topological Sorting
NEERC 2003 Central Subregional
3382
142
1281
River Basin
NEERC 2003 Central Subregional
337
1391
1282
Game Tree
NEERC 2003 Central Subregional
1433
335
1500
Pass Licenses
NEERC 2006 Eastern Subregional
705
632
1501
Sense of Beauty
NEERC 2006 Eastern Subregional
1704
264
1502
Domino Dots
NEERC 2006 Eastern Subregional
6136
74
1503
Polynomial
NEERC 2006 Eastern Subregional
248
1752
1504
Good Manners
NEERC 2006 Eastern Subregional
190
2261
1505
Oil Transfer
NEERC 2006 Eastern Subregional
150
2826
1506
Columns of Numbers
NEERC 2006 Eastern Subregional
3002
150
1507
Difficult Decision
NEERC 2006 Eastern Subregional
1027
436
1508
Japanese Puzzle
NEERC 2006 Eastern Subregional
270
1615
1509
Domino Recognition
NEERC 2006 Eastern Subregional
120
3478
1510
Order
NEERC 2006 Eastern Subregional
5173
87
1582
Bookmakers
NEERC 2007 Eastern Subregional
3534
117
1583
Cheese
NEERC 2007 Eastern Subregional
214
1857
1584
Pharaohs’ Secrets
NEERC 2007 Eastern Subregional
308
1308
1585
Penguins
NEERC 2007 Eastern Subregional
10623
39
1586
Threeprime Numbers
NEERC 2007 Eastern Subregional
2883
144
1587
Flying Pig
NEERC 2007 Eastern Subregional
509
802
1588
Jamaica
NEERC 2007 Eastern Subregional
1297
318
1589
Sokoban
NEERC 2007 Eastern Subregional
11
19810
1590
Bacon’s Cipher
NEERC 2007 Eastern Subregional
2072
200
1591
Abstract Thinking
NEERC 2007 Eastern Subregional
391
1037
1592
Chinese Watches
NEERC 2007 Eastern Subregional
686
598
1649
Abstractionism to the People
NEERC 2008 Eastern Subregional
44
7063
1650
Billionaires
NEERC 2008 Eastern Subregional
1314
288
1651
Shortest Subchain
NEERC 2008 Eastern Subregional
1089
347
1652
Banking Crisis
NEERC 2008 Eastern Subregional
137
2595
1653
Death Conveyor
NEERC 2008 Eastern Subregional
46
6811
1654
Cipher Message
NEERC 2008 Eastern Subregional
6503
59
1655
Somali Pirates
NEERC 2008 Eastern Subregional
183
1976
1656
Far Away Kingdom's Army
NEERC 2008 Eastern Subregional
1896
200
1657
Cube Snake
NEERC 2008 Eastern Subregional
255
1439
1658
Sum of Digits
NEERC 2008 Eastern Subregional
1847
205
1659
Regular Triangles
NEERC 2008 Eastern Subregional
600
625
1711
Code Names
NEERC 2009 Eastern Subregional
2742
128
1712
Cipher Grille
NEERC 2009 Eastern Subregional
4352
80
1713
Key Substrings
NEERC 2009 Eastern Subregional
577
598
1714
Mnemonics and Palindromes 2
NEERC 2009 Eastern Subregional
107
3000
1715
Another Ball Killer
NEERC 2009 Eastern Subregional
357
957
1716
Alternative Solution
NEERC 2009 Eastern Subregional
449
765
1717
Eligibility Rules
NEERC 2009 Eastern Subregional
155
2128
1718
Rejudge
NEERC 2009 Eastern Subregional
1213
287
1719
Kill the Shaitan-Boss
NEERC 2009 Eastern Subregional
233
1445
1720
Summit Online Judge
NEERC 2009 Eastern Subregional
363
941
1721
Two Sides of the Same Coin
NEERC 2009 Eastern Subregional
626
552
1800
Murphy's Law
NEERC 2010 Eastern Subregional
1777
178
1801
The Revolution Cup
NEERC 2010 Eastern Subregional
50
5310
1802
Cube Puzzle
NEERC 2010 Eastern Subregional
153
1954
1803
The Czechs' Rifles
NEERC 2010 Eastern Subregional
450
693
1804
The Machinegunners in a Playoff
NEERC 2010 Eastern Subregional
838
376
1805
Chapaev and a Cipher Grille
NEERC 2010 Eastern Subregional
337
918
1806
Mobile Telegraphs
NEERC 2010 Eastern Subregional
961
328
1807
Cartridges for Maxim
NEERC 2010 Eastern Subregional
221
1379
1808
Chapaev at the Planet Ocean
NEERC 2010 Eastern Subregional
164
1831
1809
Chapaev and Potatoes
NEERC 2010 Eastern Subregional
559
560
1885
Passenger Comfort
NEERC 2011 Eastern Subregional
1455
197
1886
Trip 2
NEERC 2011 Eastern Subregional
139
1941
1887
Frequent Flyer Card
NEERC 2011 Eastern Subregional
276
1011
1888
Pilot Work Experience
NEERC 2011 Eastern Subregional
653
436
1889
Airport Announcements
NEERC 2011 Eastern Subregional
1018
281
1890
Money out of Thin Air
NEERC 2011 Eastern Subregional
664
429
1891
Language Ocean
NEERC 2011 Eastern Subregional
441
641
1892
Morning in Koltsovo
NEERC 2011 Eastern Subregional
345
815
1893
A380
NEERC 2011 Eastern Subregional
5126
56
1894
Non-Flying Weather
NEERC 2011 Eastern Subregional
154
1764
1895
Steaks on Board
NEERC 2011 Eastern Subregional
130
2066
1910
Titan Ruins: Hidden Entrance
NEERC 2012 Eastern Subregional
7961
33
1911
Titan Ruins: Overtaking Fire
NEERC 2012 Eastern Subregional
53
4152
1912
Titan Ruins: Passing through Walls
NEERC 2012 Eastern Subregional
263
958
1913
Titan Ruins: Alignment of Forces
NEERC 2012 Eastern Subregional
143
1710
1914
Titan Ruins: Serial Control
NEERC 2012 Eastern Subregional
52
4219
1915
Titan Ruins: Reconstruction of Bygones
NEERC 2012 Eastern Subregional
1299
200
1916
Titan Ruins: Waiting for Stability
NEERC 2012 Eastern Subregional
77
3007
1917
Titan Ruins: Deadly Accuracy
NEERC 2012 Eastern Subregional
1221
213
1918
Titan Ruins: Artful Manipulations
NEERC 2012 Eastern Subregional
299
847
1919
Titan Ruins: Transformation of Cylinders
NEERC 2012 Eastern Subregional
125
1938
1920
Titan Ruins: the Infinite Power of Magic
NEERC 2012 Eastern Subregional
398
641
1990
Podracing
NEERC 2013 Eastern Subregional
240
936
1991
The battle near the swamp
NEERC 2013 Eastern Subregional
5286
44
1992
CVS
NEERC 2013 Eastern Subregional
669
345
1993
This cheeseburger you don't need
NEERC 2013 Eastern Subregional
1262
184
1994
The Emperor's plan
NEERC 2013 Eastern Subregional
236
951
1995
Illegal spices
NEERC 2013 Eastern Subregional
429
533
1996
Cipher Message 3
NEERC 2013 Eastern Subregional
201
1109
1997
Those are not the droids you're looking for
NEERC 2013 Eastern Subregional
462
496
1998
The old Padawan
NEERC 2013 Eastern Subregional
705
327
1999
The secret module
NEERC 2013 Eastern Subregional
26
6498
2012
About Grisha N.
NEERC 2014 Eastern Subregional
12755
16
2013
Neither shaken nor stirred
NEERC 2014 Eastern Subregional
238
842
2014
Zhenya moves from parents
NEERC 2014 Eastern Subregional
416
490
2015
Zhenya moves from the dormitory
NEERC 2014 Eastern Subregional
779
265
2016
Magic and Science
NEERC 2014 Eastern Subregional
17
7729
2017
Best of a bad lot
NEERC 2014 Eastern Subregional
161
1220
2018
The Debut Album
NEERC 2014 Eastern Subregional
2091
99
2019
Pair: normal and paranormal
NEERC 2014 Eastern Subregional
826
250
2020
Traffic Jam in Flower Town
NEERC 2014 Eastern Subregional
1481
140
2021
Scarily interesting!
NEERC 2014 Eastern Subregional
519
395
2022
Riding a Toad
NEERC 2014 Eastern Subregional
52
3366
2023
Donald is a postman
NEERC 2014 Eastern Subregional
5718
36
2074
Timus problems classifier
Qualification of Eastern Subregional 2015
197
842
2075
Take care of your eyebrows!
Qualification of Eastern Subregional 2015
54
2722
2076
Vasiana
Qualification of Eastern Subregional 2015
15
6969
2077
Reductions
Qualification of Eastern Subregional 2015
17
6452
Solved problems:
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