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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
636
1055
Combinations
NEERC 2000 Central Subregional
3567
413
1056
Centers of the Net
NEERC 2000 Central Subregional
2703
544
1057
Amount of Degrees
NEERC 2000 Central Subregional
2082
706
1058
Chocolate
NEERC 2000 Central Subregional
518
2791
1059
Expression
NEERC 2000 Central Subregional
2214
664
1133
Fibonacci Sequence
NEERC 2001 Central Subregional
2197
222
1134
Cards
NEERC 2001 Central Subregional
2517
194
1135
Recruits
NEERC 2001 Central Subregional
3034
161
1136
Parliament
NEERC 2001 Central Subregional
4943
99
1137
Bus Routes
NEERC 2001 Central Subregional
1502
324
1138
Integer Percentage
NEERC 2001 Central Subregional
2433
201
1139
City Blocks
NEERC 2001 Central Subregional
6349
77
1140
Swamp Incident
NEERC 2001 Central Subregional
1298
375
1158
Censored!
NEERC 2001 Northern Subregional
964
504
1159
Fence
NEERC 2001 Northern Subregional
646
748
1160
Network
NEERC 2001 Northern Subregional
3254
152
1161
Stripies
NEERC 2001 Northern Subregional
5382
91
1162
Currency Exchange
NEERC 2001 Northern Subregional
2337
209
1163
Chapaev
NEERC 2001 Northern Subregional
103
4344
1164
Fillword
NEERC 2001 Northern Subregional
2405
203
1165
Subnumber
NEERC 2001 Northern Subregional
524
919
1166
Funny Card Game
NEERC 2001 Northern Subregional
132
3540
1224
Spiral
NEERC 2002 Central Subregional
7506
66
1225
Flags
NEERC 2002 Central Subregional
13988
35
1226
esreveR redrO
NEERC 2002 Central Subregional
4394
113
1227
Rally Championship
NEERC 2002 Central Subregional
1651
299
1228
Array
NEERC 2002 Central Subregional
4634
107
1229
Strong Brickwork
NEERC 2002 Central Subregional
1299
379
1230
Introspective Program
NEERC 2002 Central Subregional
647
756
1231
Turing: One, Two, Three, …
NEERC 2002 Central Subregional
221
2150
1232
Asteroid Landing
NEERC 2002 Central Subregional
201
2354
1274
Fractional Arithmetic
NEERC 2003 Central Subregional
719
690
1275
Knights of the Round Table
NEERC 2003 Central Subregional
199
2407
1276
Train
NEERC 2003 Central Subregional
676
733
1277
Cops and Thieves
NEERC 2003 Central Subregional
625
792
1278
“… Connecting People”
NEERC 2003 Central Subregional
501
984
1279
Warehouse
NEERC 2003 Central Subregional
1185
421
1280
Topological Sorting
NEERC 2003 Central Subregional
3538
142
1281
River Basin
NEERC 2003 Central Subregional
348
1405
1282
Game Tree
NEERC 2003 Central Subregional
1486
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
6446
73
1503
Polynomial
NEERC 2006 Eastern Subregional
260
1754
1504
Good Manners
NEERC 2006 Eastern Subregional
202
2234
1505
Oil Transfer
NEERC 2006 Eastern Subregional
153
2905
1506
Columns of Numbers
NEERC 2006 Eastern Subregional
3342
141
1507
Difficult Decision
NEERC 2006 Eastern Subregional
1062
442
1508
Japanese Puzzle
NEERC 2006 Eastern Subregional
277
1650
1509
Domino Recognition
NEERC 2006 Eastern Subregional
125
3508
1510
Order
NEERC 2006 Eastern Subregional
5454
87
1582
Bookmakers
NEERC 2007 Eastern Subregional
3633
120
1583
Cheese
NEERC 2007 Eastern Subregional
224
1875
1584
Pharaohs’ Secrets
NEERC 2007 Eastern Subregional
315
1350
1585
Penguins
NEERC 2007 Eastern Subregional
11559
38
1586
Threeprime Numbers
NEERC 2007 Eastern Subregional
3033
144
1587
Flying Pig
NEERC 2007 Eastern Subregional
533
808
1588
Jamaica
NEERC 2007 Eastern Subregional
1352
322
1589
Sokoban
NEERC 2007 Eastern Subregional
15
17553
1590
Bacon’s Cipher
NEERC 2007 Eastern Subregional
2300
190
1591
Abstract Thinking
NEERC 2007 Eastern Subregional
405
1057
1592
Chinese Watches
NEERC 2007 Eastern Subregional
723
599
1649
Abstractionism to the People
NEERC 2008 Eastern Subregional
48
6993
1650
Billionaires
NEERC 2008 Eastern Subregional
2095
193
1651
Shortest Subchain
NEERC 2008 Eastern Subregional
1172
343
1652
Banking Crisis
NEERC 2008 Eastern Subregional
139
2722
1653
Death Conveyor
NEERC 2008 Eastern Subregional
50
6759
1654
Cipher Message
NEERC 2008 Eastern Subregional
6932
58
1655
Somali Pirates
NEERC 2008 Eastern Subregional
206
1878
1656
Far Away Kingdom's Army
NEERC 2008 Eastern Subregional
1998
202
1657
Cube Snake
NEERC 2008 Eastern Subregional
259
1508
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
4522
83
1713
Key Substrings
NEERC 2009 Eastern Subregional
599
618
1714
Mnemonics and Palindromes 2
NEERC 2009 Eastern Subregional
109
3163
1715
Another Ball Killer
NEERC 2009 Eastern Subregional
365
1004
1716
Alternative Solution
NEERC 2009 Eastern Subregional
486
759
1717
Eligibility Rules
NEERC 2009 Eastern Subregional
163
2176
1718
Rejudge
NEERC 2009 Eastern Subregional
1244
300
1719
Kill the Shaitan-Boss
NEERC 2009 Eastern Subregional
241
1500
1720
Summit Online Judge
NEERC 2009 Eastern Subregional
376
975
1721
Two Sides of the Same Coin
NEERC 2009 Eastern Subregional
650
570
1800
Murphy's Law
NEERC 2010 Eastern Subregional
2031
169
1801
The Revolution Cup
NEERC 2010 Eastern Subregional
52
5568
1802
Cube Puzzle
NEERC 2010 Eastern Subregional
156
2079
1803
The Czechs' Rifles
NEERC 2010 Eastern Subregional
467
724
1804
The Machinegunners in a Playoff
NEERC 2010 Eastern Subregional
865
395
1805
Chapaev and a Cipher Grille
NEERC 2010 Eastern Subregional
344
975
1806
Mobile Telegraphs
NEERC 2010 Eastern Subregional
1713
200
1807
Cartridges for Maxim
NEERC 2010 Eastern Subregional
230
1438
1808
Chapaev at the Planet Ocean
NEERC 2010 Eastern Subregional
171
1907
1809
Chapaev and Potatoes
NEERC 2010 Eastern Subregional
587
578
1885
Passenger Comfort
NEERC 2011 Eastern Subregional
1600
197
1886
Trip 2
NEERC 2011 Eastern Subregional
144
2058
1887
Frequent Flyer Card
NEERC 2011 Eastern Subregional
292
1050
1888
Pilot Work Experience
NEERC 2011 Eastern Subregional
698
448
1889
Airport Announcements
NEERC 2011 Eastern Subregional
1073
293
1890
Money out of Thin Air
NEERC 2011 Eastern Subregional
695
450
1891
Language Ocean
NEERC 2011 Eastern Subregional
457
679
1892
Morning in Koltsovo
NEERC 2011 Eastern Subregional
357
864
1893
A380
NEERC 2011 Eastern Subregional
5518
57
1894
Non-Flying Weather
NEERC 2011 Eastern Subregional
200
1509
1895
Steaks on Board
NEERC 2011 Eastern Subregional
139
2127
1910
Titan Ruins: Hidden Entrance
NEERC 2012 Eastern Subregional
8812
33
1911
Titan Ruins: Overtaking Fire
NEERC 2012 Eastern Subregional
54
4538
1912
Titan Ruins: Passing through Walls
NEERC 2012 Eastern Subregional
227
1225
1913
Titan Ruins: Alignment of Forces
NEERC 2012 Eastern Subregional
149
1827
1914
Titan Ruins: Serial Control
NEERC 2012 Eastern Subregional
56
4400
1915
Titan Ruins: Reconstruction of Bygones
NEERC 2012 Eastern Subregional
1371
210
1916
Titan Ruins: Waiting for Stability
NEERC 2012 Eastern Subregional
79
3263
1917
Titan Ruins: Deadly Accuracy
NEERC 2012 Eastern Subregional
1272
227
1918
Titan Ruins: Artful Manipulations
NEERC 2012 Eastern Subregional
308
913
1919
Titan Ruins: Transformation of Cylinders
NEERC 2012 Eastern Subregional
134
2017
1920
Titan Ruins: the Infinite Power of Magic
NEERC 2012 Eastern Subregional
407
696
1990
Podracing
NEERC 2013 Eastern Subregional
248
1023
1991
The battle near the swamp
NEERC 2013 Eastern Subregional
5783
46
1992
CVS
NEERC 2013 Eastern Subregional
696
374
1993
This cheeseburger you don't need
NEERC 2013 Eastern Subregional
1352
194
1994
The Emperor's plan
NEERC 2013 Eastern Subregional
247
1027
1995
Illegal spices
NEERC 2013 Eastern Subregional
444
581
1996
Cipher Message 3
NEERC 2013 Eastern Subregional
208
1210
1997
Those are not the droids you're looking for
NEERC 2013 Eastern Subregional
488
530
1998
The old Padawan
NEERC 2013 Eastern Subregional
737
353
1999
The secret module
NEERC 2013 Eastern Subregional
28
6943
2012
About Grisha N.
NEERC 2014 Eastern Subregional
14688
16
2013
Neither shaken nor stirred
NEERC 2014 Eastern Subregional
251
918
2014
Zhenya moves from parents
NEERC 2014 Eastern Subregional
446
525
2015
Zhenya moves from the dormitory
NEERC 2014 Eastern Subregional
823
288
2016
Magic and Science
NEERC 2014 Eastern Subregional
18
8557
2017
Best of a bad lot
NEERC 2014 Eastern Subregional
175
1295
2018
The Debut Album
NEERC 2014 Eastern Subregional
2374
101
2019
Pair: normal and paranormal
NEERC 2014 Eastern Subregional
867
273
2020
Traffic Jam in Flower Town
NEERC 2014 Eastern Subregional
1594
149
2021
Scarily interesting!
NEERC 2014 Eastern Subregional
547
430
2022
Riding a Toad
NEERC 2014 Eastern Subregional
56
3630
2023
Donald is a postman
NEERC 2014 Eastern Subregional
6423
37
2074
Timus problems classifier
Qualification of Eastern Subregional 2015
207
951
2075
Take care of your eyebrows!
Qualification of Eastern Subregional 2015
64
2790
2076
Vasiana
Qualification of Eastern Subregional 2015
16
7941
2077
Reductions
Qualification of Eastern Subregional 2015
17
7647
Solved problems:
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