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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
4402
336
1054
Tower of Hanoi
NEERC 2000 Central Subregional
2313
638
1055
Combinations
NEERC 2000 Central Subregional
3568
414
1056
Centers of the Net
NEERC 2000 Central Subregional
2706
545
1057
Amount of Degrees
NEERC 2000 Central Subregional
2085
707
1058
Chocolate
NEERC 2000 Central Subregional
519
2794
1059
Expression
NEERC 2000 Central Subregional
2216
665
1133
Fibonacci Sequence
NEERC 2001 Central Subregional
2201
222
1134
Cards
NEERC 2001 Central Subregional
2522
194
1135
Recruits
NEERC 2001 Central Subregional
3038
161
1136
Parliament
NEERC 2001 Central Subregional
4950
99
1137
Bus Routes
NEERC 2001 Central Subregional
1508
324
1138
Integer Percentage
NEERC 2001 Central Subregional
2438
201
1139
City Blocks
NEERC 2001 Central Subregional
6359
77
1140
Swamp Incident
NEERC 2001 Central Subregional
1300
375
1158
Censored!
NEERC 2001 Northern Subregional
965
505
1159
Fence
NEERC 2001 Northern Subregional
647
749
1160
Network
NEERC 2001 Northern Subregional
3264
152
1161
Stripies
NEERC 2001 Northern Subregional
5390
91
1162
Currency Exchange
NEERC 2001 Northern Subregional
2343
209
1163
Chapaev
NEERC 2001 Northern Subregional
105
4280
1164
Fillword
NEERC 2001 Northern Subregional
2408
204
1165
Subnumber
NEERC 2001 Northern Subregional
528
915
1166
Funny Card Game
NEERC 2001 Northern Subregional
132
3549
1224
Spiral
NEERC 2002 Central Subregional
7515
66
1225
Flags
NEERC 2002 Central Subregional
14023
35
1226
esreveR redrO
NEERC 2002 Central Subregional
4402
113
1227
Rally Championship
NEERC 2002 Central Subregional
1653
300
1228
Array
NEERC 2002 Central Subregional
4644
107
1229
Strong Brickwork
NEERC 2002 Central Subregional
1301
380
1230
Introspective Program
NEERC 2002 Central Subregional
650
755
1231
Turing: One, Two, Three, …
NEERC 2002 Central Subregional
222
2147
1232
Asteroid Landing
NEERC 2002 Central Subregional
202
2350
1274
Fractional Arithmetic
NEERC 2003 Central Subregional
723
688
1275
Knights of the Round Table
NEERC 2003 Central Subregional
200
2402
1276
Train
NEERC 2003 Central Subregional
679
732
1277
Cops and Thieves
NEERC 2003 Central Subregional
628
791
1278
“… Connecting People”
NEERC 2003 Central Subregional
502
985
1279
Warehouse
NEERC 2003 Central Subregional
1188
421
1280
Topological Sorting
NEERC 2003 Central Subregional
3551
142
1281
River Basin
NEERC 2003 Central Subregional
350
1401
1282
Game Tree
NEERC 2003 Central Subregional
1490
336
1500
Pass Licenses
NEERC 2006 Eastern Subregional
740
633
1501
Sense of Beauty
NEERC 2006 Eastern Subregional
1782
265
1502
Domino Dots
NEERC 2006 Eastern Subregional
6453
73
1503
Polynomial
NEERC 2006 Eastern Subregional
262
1746
1504
Good Manners
NEERC 2006 Eastern Subregional
203
2230
1505
Oil Transfer
NEERC 2006 Eastern Subregional
153
2914
1506
Columns of Numbers
NEERC 2006 Eastern Subregional
3346
142
1507
Difficult Decision
NEERC 2006 Eastern Subregional
1066
441
1508
Japanese Puzzle
NEERC 2006 Eastern Subregional
278
1649
1509
Domino Recognition
NEERC 2006 Eastern Subregional
125
3518
1510
Order
NEERC 2006 Eastern Subregional
5460
87
1582
Bookmakers
NEERC 2007 Eastern Subregional
3644
121
1583
Cheese
NEERC 2007 Eastern Subregional
224
1882
1584
Pharaohs’ Secrets
NEERC 2007 Eastern Subregional
315
1355
1585
Penguins
NEERC 2007 Eastern Subregional
11591
38
1586
Threeprime Numbers
NEERC 2007 Eastern Subregional
3045
144
1587
Flying Pig
NEERC 2007 Eastern Subregional
535
808
1588
Jamaica
NEERC 2007 Eastern Subregional
1354
323
1589
Sokoban
NEERC 2007 Eastern Subregional
17
16310
1590
Bacon’s Cipher
NEERC 2007 Eastern Subregional
2310
190
1591
Abstract Thinking
NEERC 2007 Eastern Subregional
405
1061
1592
Chinese Watches
NEERC 2007 Eastern Subregional
725
599
1649
Abstractionism to the People
NEERC 2008 Eastern Subregional
48
7021
1650
Billionaires
NEERC 2008 Eastern Subregional
2105
193
1651
Shortest Subchain
NEERC 2008 Eastern Subregional
1174
344
1652
Banking Crisis
NEERC 2008 Eastern Subregional
139
2733
1653
Death Conveyor
NEERC 2008 Eastern Subregional
50
6787
1654
Cipher Message
NEERC 2008 Eastern Subregional
6948
59
1655
Somali Pirates
NEERC 2008 Eastern Subregional
207
1877
1656
Far Away Kingdom's Army
NEERC 2008 Eastern Subregional
2002
202
1657
Cube Snake
NEERC 2008 Eastern Subregional
260
1508
1658
Sum of Digits
NEERC 2008 Eastern Subregional
2044
198
1659
Regular Triangles
NEERC 2008 Eastern Subregional
622
644
1711
Code Names
NEERC 2009 Eastern Subregional
2886
131
1712
Cipher Grille
NEERC 2009 Eastern Subregional
4529
83
1713
Key Substrings
NEERC 2009 Eastern Subregional
601
619
1714
Mnemonics and Palindromes 2
NEERC 2009 Eastern Subregional
109
3177
1715
Another Ball Killer
NEERC 2009 Eastern Subregional
367
1003
1716
Alternative Solution
NEERC 2009 Eastern Subregional
489
758
1717
Eligibility Rules
NEERC 2009 Eastern Subregional
163
2186
1718
Rejudge
NEERC 2009 Eastern Subregional
1247
301
1719
Kill the Shaitan-Boss
NEERC 2009 Eastern Subregional
243
1495
1720
Summit Online Judge
NEERC 2009 Eastern Subregional
376
980
1721
Two Sides of the Same Coin
NEERC 2009 Eastern Subregional
652
571
1800
Murphy's Law
NEERC 2010 Eastern Subregional
2036
170
1801
The Revolution Cup
NEERC 2010 Eastern Subregional
53
5508
1802
Cube Puzzle
NEERC 2010 Eastern Subregional
157
2078
1803
The Czechs' Rifles
NEERC 2010 Eastern Subregional
469
724
1804
The Machinegunners in a Playoff
NEERC 2010 Eastern Subregional
867
396
1805
Chapaev and a Cipher Grille
NEERC 2010 Eastern Subregional
344
980
1806
Mobile Telegraphs
NEERC 2010 Eastern Subregional
1720
201
1807
Cartridges for Maxim
NEERC 2010 Eastern Subregional
230
1446
1808
Chapaev at the Planet Ocean
NEERC 2010 Eastern Subregional
171
1917
1809
Chapaev and Potatoes
NEERC 2010 Eastern Subregional
587
581
1885
Passenger Comfort
NEERC 2011 Eastern Subregional
1610
197
1886
Trip 2
NEERC 2011 Eastern Subregional
144
2071
1887
Frequent Flyer Card
NEERC 2011 Eastern Subregional
292
1056
1888
Pilot Work Experience
NEERC 2011 Eastern Subregional
700
449
1889
Airport Announcements
NEERC 2011 Eastern Subregional
1075
294
1890
Money out of Thin Air
NEERC 2011 Eastern Subregional
696
452
1891
Language Ocean
NEERC 2011 Eastern Subregional
460
678
1892
Morning in Koltsovo
NEERC 2011 Eastern Subregional
359
864
1893
A380
NEERC 2011 Eastern Subregional
5526
58
1894
Non-Flying Weather
NEERC 2011 Eastern Subregional
202
1504
1895
Steaks on Board
NEERC 2011 Eastern Subregional
140
2126
1910
Titan Ruins: Hidden Entrance
NEERC 2012 Eastern Subregional
8835
33
1911
Titan Ruins: Overtaking Fire
NEERC 2012 Eastern Subregional
56
4430
1912
Titan Ruins: Passing through Walls
NEERC 2012 Eastern Subregional
228
1229
1913
Titan Ruins: Alignment of Forces
NEERC 2012 Eastern Subregional
149
1839
1914
Titan Ruins: Serial Control
NEERC 2012 Eastern Subregional
57
4364
1915
Titan Ruins: Reconstruction of Bygones
NEERC 2012 Eastern Subregional
1373
211
1916
Titan Ruins: Waiting for Stability
NEERC 2012 Eastern Subregional
80
3249
1917
Titan Ruins: Deadly Accuracy
NEERC 2012 Eastern Subregional
1275
228
1918
Titan Ruins: Artful Manipulations
NEERC 2012 Eastern Subregional
310
914
1919
Titan Ruins: Transformation of Cylinders
NEERC 2012 Eastern Subregional
134
2031
1920
Titan Ruins: the Infinite Power of Magic
NEERC 2012 Eastern Subregional
409
698
1990
Podracing
NEERC 2013 Eastern Subregional
248
1031
1991
The battle near the swamp
NEERC 2013 Eastern Subregional
5803
46
1992
CVS
NEERC 2013 Eastern Subregional
698
376
1993
This cheeseburger you don't need
NEERC 2013 Eastern Subregional
1356
195
1994
The Emperor's plan
NEERC 2013 Eastern Subregional
248
1031
1995
Illegal spices
NEERC 2013 Eastern Subregional
445
584
1996
Cipher Message 3
NEERC 2013 Eastern Subregional
209
1214
1997
Those are not the droids you're looking for
NEERC 2013 Eastern Subregional
490
532
1998
The old Padawan
NEERC 2013 Eastern Subregional
739
355
1999
The secret module
NEERC 2013 Eastern Subregional
29
6817
2012
About Grisha N.
NEERC 2014 Eastern Subregional
14750
16
2013
Neither shaken nor stirred
NEERC 2014 Eastern Subregional
251
926
2014
Zhenya moves from parents
NEERC 2014 Eastern Subregional
448
528
2015
Zhenya moves from the dormitory
NEERC 2014 Eastern Subregional
829
288
2016
Magic and Science
NEERC 2014 Eastern Subregional
19
8335
2017
Best of a bad lot
NEERC 2014 Eastern Subregional
175
1307
2018
The Debut Album
NEERC 2014 Eastern Subregional
2389
101
2019
Pair: normal and paranormal
NEERC 2014 Eastern Subregional
869
275
2020
Traffic Jam in Flower Town
NEERC 2014 Eastern Subregional
1600
150
2021
Scarily interesting!
NEERC 2014 Eastern Subregional
548
433
2022
Riding a Toad
NEERC 2014 Eastern Subregional
57
3608
2023
Donald is a postman
NEERC 2014 Eastern Subregional
6451
37
2074
Timus problems classifier
Qualification of Eastern Subregional 2015
207
962
2075
Take care of your eyebrows!
Qualification of Eastern Subregional 2015
65
2782
2076
Vasiana
Qualification of Eastern Subregional 2015
16
8025
2077
Reductions
Qualification of Eastern Subregional 2015
17
7728
Solved problems:
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