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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
4372
332
1054
Tower of Hanoi
NEERC 2000 Central Subregional
2264
641
1055
Combinations
NEERC 2000 Central Subregional
3531
411
1056
Centers of the Net
NEERC 2000 Central Subregional
2665
545
1057
Amount of Degrees
NEERC 2000 Central Subregional
2035
712
1058
Chocolate
NEERC 2000 Central Subregional
513
2779
1059
Expression
NEERC 2000 Central Subregional
2198
660
1133
Fibonacci Sequence
NEERC 2001 Central Subregional
2181
221
1134
Cards
NEERC 2001 Central Subregional
2491
193
1135
Recruits
NEERC 2001 Central Subregional
2957
163
1136
Parliament
NEERC 2001 Central Subregional
4870
99
1137
Bus Routes
NEERC 2001 Central Subregional
1456
330
1138
Integer Percentage
NEERC 2001 Central Subregional
2406
200
1139
City Blocks
NEERC 2001 Central Subregional
6268
77
1140
Swamp Incident
NEERC 2001 Central Subregional
1284
374
1158
Censored!
NEERC 2001 Northern Subregional
956
501
1159
Fence
NEERC 2001 Northern Subregional
639
746
1160
Network
NEERC 2001 Northern Subregional
2965
165
1161
Stripies
NEERC 2001 Northern Subregional
5338
91
1162
Currency Exchange
NEERC 2001 Northern Subregional
2093
230
1163
Chapaev
NEERC 2001 Northern Subregional
102
4324
1164
Fillword
NEERC 2001 Northern Subregional
2389
202
1165
Subnumber
NEERC 2001 Northern Subregional
523
909
1166
Funny Card Game
NEERC 2001 Northern Subregional
130
3545
1224
Spiral
NEERC 2002 Central Subregional
7346
67
1225
Flags
NEERC 2002 Central Subregional
13694
36
1226
esreveR redrO
NEERC 2002 Central Subregional
4369
112
1227
Rally Championship
NEERC 2002 Central Subregional
1622
300
1228
Array
NEERC 2002 Central Subregional
4606
106
1229
Strong Brickwork
NEERC 2002 Central Subregional
1290
377
1230
Introspective Program
NEERC 2002 Central Subregional
640
754
1231
Turing: One, Two, Three, …
NEERC 2002 Central Subregional
218
2150
1232
Asteroid Landing
NEERC 2002 Central Subregional
197
2368
1274
Fractional Arithmetic
NEERC 2003 Central Subregional
702
698
1275
Knights of the Round Table
NEERC 2003 Central Subregional
196
2411
1276
Train
NEERC 2003 Central Subregional
668
732
1277
Cops and Thieves
NEERC 2003 Central Subregional
620
788
1278
“… Connecting People”
NEERC 2003 Central Subregional
498
978
1279
Warehouse
NEERC 2003 Central Subregional
1177
418
1280
Topological Sorting
NEERC 2003 Central Subregional
3484
142
1281
River Basin
NEERC 2003 Central Subregional
347
1391
1282
Game Tree
NEERC 2003 Central Subregional
1474
335
1500
Pass Licenses
NEERC 2006 Eastern Subregional
721
639
1501
Sense of Beauty
NEERC 2006 Eastern Subregional
1764
263
1502
Domino Dots
NEERC 2006 Eastern Subregional
6368
73
1503
Polynomial
NEERC 2006 Eastern Subregional
258
1742
1504
Good Manners
NEERC 2006 Eastern Subregional
199
2233
1505
Oil Transfer
NEERC 2006 Eastern Subregional
151
2899
1506
Columns of Numbers
NEERC 2006 Eastern Subregional
3179
146
1507
Difficult Decision
NEERC 2006 Eastern Subregional
1052
440
1508
Japanese Puzzle
NEERC 2006 Eastern Subregional
275
1638
1509
Domino Recognition
NEERC 2006 Eastern Subregional
124
3483
1510
Order
NEERC 2006 Eastern Subregional
5370
87
1582
Bookmakers
NEERC 2007 Eastern Subregional
3603
119
1583
Cheese
NEERC 2007 Eastern Subregional
220
1877
1584
Pharaohs’ Secrets
NEERC 2007 Eastern Subregional
314
1332
1585
Penguins
NEERC 2007 Eastern Subregional
11313
38
1586
Threeprime Numbers
NEERC 2007 Eastern Subregional
2986
144
1587
Flying Pig
NEERC 2007 Eastern Subregional
528
802
1588
Jamaica
NEERC 2007 Eastern Subregional
1334
321
1589
Sokoban
NEERC 2007 Eastern Subregional
13
18766
1590
Bacon’s Cipher
NEERC 2007 Eastern Subregional
2266
190
1591
Abstract Thinking
NEERC 2007 Eastern Subregional
399
1055
1592
Chinese Watches
NEERC 2007 Eastern Subregional
707
602
1649
Abstractionism to the People
NEERC 2008 Eastern Subregional
47
6981
1650
Billionaires
NEERC 2008 Eastern Subregional
1834
216
1651
Shortest Subchain
NEERC 2008 Eastern Subregional
1142
345
1652
Banking Crisis
NEERC 2008 Eastern Subregional
137
2707
1653
Death Conveyor
NEERC 2008 Eastern Subregional
49
6745
1654
Cipher Message
NEERC 2008 Eastern Subregional
6800
58
1655
Somali Pirates
NEERC 2008 Eastern Subregional
197
1922
1656
Far Away Kingdom's Army
NEERC 2008 Eastern Subregional
1972
201
1657
Cube Snake
NEERC 2008 Eastern Subregional
258
1485
1658
Sum of Digits
NEERC 2008 Eastern Subregional
2019
196
1659
Regular Triangles
NEERC 2008 Eastern Subregional
612
640
1711
Code Names
NEERC 2009 Eastern Subregional
2836
129
1712
Cipher Grille
NEERC 2009 Eastern Subregional
4485
82
1713
Key Substrings
NEERC 2009 Eastern Subregional
591
613
1714
Mnemonics and Palindromes 2
NEERC 2009 Eastern Subregional
107
3149
1715
Another Ball Killer
NEERC 2009 Eastern Subregional
363
988
1716
Alternative Solution
NEERC 2009 Eastern Subregional
480
752
1717
Eligibility Rules
NEERC 2009 Eastern Subregional
161
2154
1718
Rejudge
NEERC 2009 Eastern Subregional
1237
295
1719
Kill the Shaitan-Boss
NEERC 2009 Eastern Subregional
240
1474
1720
Summit Online Judge
NEERC 2009 Eastern Subregional
368
975
1721
Two Sides of the Same Coin
NEERC 2009 Eastern Subregional
640
567
1800
Murphy's Law
NEERC 2010 Eastern Subregional
1913
175
1801
The Revolution Cup
NEERC 2010 Eastern Subregional
51
5521
1802
Cube Puzzle
NEERC 2010 Eastern Subregional
155
2041
1803
The Czechs' Rifles
NEERC 2010 Eastern Subregional
459
718
1804
The Machinegunners in a Playoff
NEERC 2010 Eastern Subregional
857
388
1805
Chapaev and a Cipher Grille
NEERC 2010 Eastern Subregional
342
957
1806
Mobile Telegraphs
NEERC 2010 Eastern Subregional
1440
232
1807
Cartridges for Maxim
NEERC 2010 Eastern Subregional
227
1421
1808
Chapaev at the Planet Ocean
NEERC 2010 Eastern Subregional
169
1881
1809
Chapaev and Potatoes
NEERC 2010 Eastern Subregional
578
573
1885
Passenger Comfort
NEERC 2011 Eastern Subregional
1564
196
1886
Trip 2
NEERC 2011 Eastern Subregional
143
2015
1887
Frequent Flyer Card
NEERC 2011 Eastern Subregional
291
1024
1888
Pilot Work Experience
NEERC 2011 Eastern Subregional
671
453
1889
Airport Announcements
NEERC 2011 Eastern Subregional
1062
288
1890
Money out of Thin Air
NEERC 2011 Eastern Subregional
686
443
1891
Language Ocean
NEERC 2011 Eastern Subregional
451
669
1892
Morning in Koltsovo
NEERC 2011 Eastern Subregional
350
856
1893
A380
NEERC 2011 Eastern Subregional
5387
57
1894
Non-Flying Weather
NEERC 2011 Eastern Subregional
189
1549
1895
Steaks on Board
NEERC 2011 Eastern Subregional
136
2111
1910
Titan Ruins: Hidden Entrance
NEERC 2012 Eastern Subregional
8581
33
1911
Titan Ruins: Overtaking Fire
NEERC 2012 Eastern Subregional
53
4465
1912
Titan Ruins: Passing through Walls
NEERC 2012 Eastern Subregional
224
1202
1913
Titan Ruins: Alignment of Forces
NEERC 2012 Eastern Subregional
147
1792
1914
Titan Ruins: Serial Control
NEERC 2012 Eastern Subregional
55
4328
1915
Titan Ruins: Reconstruction of Bygones
NEERC 2012 Eastern Subregional
1355
206
1916
Titan Ruins: Waiting for Stability
NEERC 2012 Eastern Subregional
78
3197
1917
Titan Ruins: Deadly Accuracy
NEERC 2012 Eastern Subregional
1258
222
1918
Titan Ruins: Artful Manipulations
NEERC 2012 Eastern Subregional
306
890
1919
Titan Ruins: Transformation of Cylinders
NEERC 2012 Eastern Subregional
131
1995
1920
Titan Ruins: the Infinite Power of Magic
NEERC 2012 Eastern Subregional
401
684
1990
Podracing
NEERC 2013 Eastern Subregional
244
1002
1991
The battle near the swamp
NEERC 2013 Eastern Subregional
5625
45
1992
CVS
NEERC 2013 Eastern Subregional
676
371
1993
This cheeseburger you don't need
NEERC 2013 Eastern Subregional
1334
189
1994
The Emperor's plan
NEERC 2013 Eastern Subregional
244
1002
1995
Illegal spices
NEERC 2013 Eastern Subregional
440
565
1996
Cipher Message 3
NEERC 2013 Eastern Subregional
206
1178
1997
Those are not the droids you're looking for
NEERC 2013 Eastern Subregional
478
521
1998
The old Padawan
NEERC 2013 Eastern Subregional
725
346
1999
The secret module
NEERC 2013 Eastern Subregional
26
7066
2012
About Grisha N.
NEERC 2014 Eastern Subregional
14136
16
2013
Neither shaken nor stirred
NEERC 2014 Eastern Subregional
246
898
2014
Zhenya moves from parents
NEERC 2014 Eastern Subregional
431
521
2015
Zhenya moves from the dormitory
NEERC 2014 Eastern Subregional
809
281
2016
Magic and Science
NEERC 2014 Eastern Subregional
18
8208
2017
Best of a bad lot
NEERC 2014 Eastern Subregional
169
1284
2018
The Debut Album
NEERC 2014 Eastern Subregional
2263
101
2019
Pair: normal and paranormal
NEERC 2014 Eastern Subregional
859
264
2020
Traffic Jam in Flower Town
NEERC 2014 Eastern Subregional
1570
145
2021
Scarily interesting!
NEERC 2014 Eastern Subregional
542
416
2022
Riding a Toad
NEERC 2014 Eastern Subregional
55
3536
2023
Donald is a postman
NEERC 2014 Eastern Subregional
6221
37
2074
Timus problems classifier
Qualification of Eastern Subregional 2015
203
922
2075
Take care of your eyebrows!
Qualification of Eastern Subregional 2015
58
2886
2076
Vasiana
Qualification of Eastern Subregional 2015
16
7549
2077
Reductions
Qualification of Eastern Subregional 2015
17
7270
Solved problems:
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