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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
4345
330
1054
Tower of Hanoi
NEERC 2000 Central Subregional
2191
652
1055
Combinations
NEERC 2000 Central Subregional
3504
409
1056
Centers of the Net
NEERC 2000 Central Subregional
2646
540
1057
Amount of Degrees
NEERC 2000 Central Subregional
2016
709
1058
Chocolate
NEERC 2000 Central Subregional
508
2765
1059
Expression
NEERC 2000 Central Subregional
2189
653
1133
Fibonacci Sequence
NEERC 2001 Central Subregional
2151
221
1134
Cards
NEERC 2001 Central Subregional
2455
193
1135
Recruits
NEERC 2001 Central Subregional
2930
162
1136
Parliament
NEERC 2001 Central Subregional
4775
100
1137
Bus Routes
NEERC 2001 Central Subregional
1417
334
1138
Integer Percentage
NEERC 2001 Central Subregional
2372
200
1139
City Blocks
NEERC 2001 Central Subregional
6169
77
1140
Swamp Incident
NEERC 2001 Central Subregional
1274
371
1158
Censored!
NEERC 2001 Northern Subregional
940
503
1159
Fence
NEERC 2001 Northern Subregional
636
739
1160
Network
NEERC 2001 Northern Subregional
2459
196
1161
Stripies
NEERC 2001 Northern Subregional
5248
91
1162
Currency Exchange
NEERC 2001 Northern Subregional
1659
286
1163
Chapaev
NEERC 2001 Northern Subregional
243
1887
1164
Fillword
NEERC 2001 Northern Subregional
2362
201
1165
Subnumber
NEERC 2001 Northern Subregional
522
897
1166
Funny Card Game
NEERC 2001 Northern Subregional
128
3547
1224
Spiral
NEERC 2002 Central Subregional
7243
67
1225
Flags
NEERC 2002 Central Subregional
13402
36
1226
esreveR redrO
NEERC 2002 Central Subregional
4325
112
1227
Rally Championship
NEERC 2002 Central Subregional
1578
304
1228
Array
NEERC 2002 Central Subregional
4566
106
1229
Strong Brickwork
NEERC 2002 Central Subregional
1274
377
1230
Introspective Program
NEERC 2002 Central Subregional
634
751
1231
Turing: One, Two, Three, …
NEERC 2002 Central Subregional
217
2130
1232
Asteroid Landing
NEERC 2002 Central Subregional
192
2393
1274
Fractional Arithmetic
NEERC 2003 Central Subregional
699
691
1275
Knights of the Round Table
NEERC 2003 Central Subregional
190
2450
1276
Train
NEERC 2003 Central Subregional
646
747
1277
Cops and Thieves
NEERC 2003 Central Subregional
611
789
1278
“… Connecting People”
NEERC 2003 Central Subregional
492
976
1279
Warehouse
NEERC 2003 Central Subregional
1165
417
1280
Topological Sorting
NEERC 2003 Central Subregional
3433
142
1281
River Basin
NEERC 2003 Central Subregional
343
1388
1282
Game Tree
NEERC 2003 Central Subregional
1453
335
1500
Pass Licenses
NEERC 2006 Eastern Subregional
710
638
1501
Sense of Beauty
NEERC 2006 Eastern Subregional
1737
263
1502
Domino Dots
NEERC 2006 Eastern Subregional
6270
73
1503
Polynomial
NEERC 2006 Eastern Subregional
252
1754
1504
Good Manners
NEERC 2006 Eastern Subregional
193
2264
1505
Oil Transfer
NEERC 2006 Eastern Subregional
150
2873
1506
Columns of Numbers
NEERC 2006 Eastern Subregional
3109
147
1507
Difficult Decision
NEERC 2006 Eastern Subregional
1036
439
1508
Japanese Puzzle
NEERC 2006 Eastern Subregional
272
1630
1509
Domino Recognition
NEERC 2006 Eastern Subregional
121
3509
1510
Order
NEERC 2006 Eastern Subregional
5260
87
1582
Bookmakers
NEERC 2007 Eastern Subregional
3566
119
1583
Cheese
NEERC 2007 Eastern Subregional
217
1868
1584
Pharaohs’ Secrets
NEERC 2007 Eastern Subregional
311
1321
1585
Penguins
NEERC 2007 Eastern Subregional
11014
38
1586
Threeprime Numbers
NEERC 2007 Eastern Subregional
2934
144
1587
Flying Pig
NEERC 2007 Eastern Subregional
518
803
1588
Jamaica
NEERC 2007 Eastern Subregional
1314
320
1589
Sokoban
NEERC 2007 Eastern Subregional
12
19275
1590
Bacon’s Cipher
NEERC 2007 Eastern Subregional
2231
189
1591
Abstract Thinking
NEERC 2007 Eastern Subregional
394
1050
1592
Chinese Watches
NEERC 2007 Eastern Subregional
696
601
1649
Abstractionism to the People
NEERC 2008 Eastern Subregional
45
7089
1650
Billionaires
NEERC 2008 Eastern Subregional
1374
282
1651
Shortest Subchain
NEERC 2008 Eastern Subregional
1110
348
1652
Banking Crisis
NEERC 2008 Eastern Subregional
137
2652
1653
Death Conveyor
NEERC 2008 Eastern Subregional
47
6840
1654
Cipher Message
NEERC 2008 Eastern Subregional
6641
59
1655
Somali Pirates
NEERC 2008 Eastern Subregional
193
1921
1656
Far Away Kingdom's Army
NEERC 2008 Eastern Subregional
1942
200
1657
Cube Snake
NEERC 2008 Eastern Subregional
257
1460
1658
Sum of Digits
NEERC 2008 Eastern Subregional
1980
196
1659
Regular Triangles
NEERC 2008 Eastern Subregional
606
633
1711
Code Names
NEERC 2009 Eastern Subregional
2794
128
1712
Cipher Grille
NEERC 2009 Eastern Subregional
4416
81
1713
Key Substrings
NEERC 2009 Eastern Subregional
583
607
1714
Mnemonics and Palindromes 2
NEERC 2009 Eastern Subregional
107
3077
1715
Another Ball Killer
NEERC 2009 Eastern Subregional
360
973
1716
Alternative Solution
NEERC 2009 Eastern Subregional
474
744
1717
Eligibility Rules
NEERC 2009 Eastern Subregional
157
2155
1718
Rejudge
NEERC 2009 Eastern Subregional
1222
292
1719
Kill the Shaitan-Boss
NEERC 2009 Eastern Subregional
234
1475
1720
Summit Online Judge
NEERC 2009 Eastern Subregional
366
957
1721
Two Sides of the Same Coin
NEERC 2009 Eastern Subregional
634
559
1800
Murphy's Law
NEERC 2010 Eastern Subregional
1846
177
1801
The Revolution Cup
NEERC 2010 Eastern Subregional
50
5466
1802
Cube Puzzle
NEERC 2010 Eastern Subregional
154
2000
1803
The Czechs' Rifles
NEERC 2010 Eastern Subregional
456
704
1804
The Machinegunners in a Playoff
NEERC 2010 Eastern Subregional
847
383
1805
Chapaev and a Cipher Grille
NEERC 2010 Eastern Subregional
341
934
1806
Mobile Telegraphs
NEERC 2010 Eastern Subregional
1022
318
1807
Cartridges for Maxim
NEERC 2010 Eastern Subregional
226
1390
1808
Chapaev at the Planet Ocean
NEERC 2010 Eastern Subregional
165
1874
1809
Chapaev and Potatoes
NEERC 2010 Eastern Subregional
567
568
1885
Passenger Comfort
NEERC 2011 Eastern Subregional
1525
195
1886
Trip 2
NEERC 2011 Eastern Subregional
140
1993
1887
Frequent Flyer Card
NEERC 2011 Eastern Subregional
283
1020
1888
Pilot Work Experience
NEERC 2011 Eastern Subregional
659
447
1889
Airport Announcements
NEERC 2011 Eastern Subregional
1047
283
1890
Money out of Thin Air
NEERC 2011 Eastern Subregional
676
436
1891
Language Ocean
NEERC 2011 Eastern Subregional
448
653
1892
Morning in Koltsovo
NEERC 2011 Eastern Subregional
350
831
1893
A380
NEERC 2011 Eastern Subregional
5260
57
1894
Non-Flying Weather
NEERC 2011 Eastern Subregional
173
1634
1895
Steaks on Board
NEERC 2011 Eastern Subregional
133
2091
1910
Titan Ruins: Hidden Entrance
NEERC 2012 Eastern Subregional
8256
33
1911
Titan Ruins: Overtaking Fire
NEERC 2012 Eastern Subregional
53
4313
1912
Titan Ruins: Passing through Walls
NEERC 2012 Eastern Subregional
221
1176
1913
Titan Ruins: Alignment of Forces
NEERC 2012 Eastern Subregional
144
1765
1914
Titan Ruins: Serial Control
NEERC 2012 Eastern Subregional
54
4246
1915
Titan Ruins: Reconstruction of Bygones
NEERC 2012 Eastern Subregional
1329
203
1916
Titan Ruins: Waiting for Stability
NEERC 2012 Eastern Subregional
77
3123
1917
Titan Ruins: Deadly Accuracy
NEERC 2012 Eastern Subregional
1238
218
1918
Titan Ruins: Artful Manipulations
NEERC 2012 Eastern Subregional
302
871
1919
Titan Ruins: Transformation of Cylinders
NEERC 2012 Eastern Subregional
126
1998
1920
Titan Ruins: the Infinite Power of Magic
NEERC 2012 Eastern Subregional
399
664
1990
Podracing
NEERC 2013 Eastern Subregional
241
974
1991
The battle near the swamp
NEERC 2013 Eastern Subregional
5470
45
1992
CVS
NEERC 2013 Eastern Subregional
651
370
1993
This cheeseburger you don't need
NEERC 2013 Eastern Subregional
1305
186
1994
The Emperor's plan
NEERC 2013 Eastern Subregional
241
974
1995
Illegal spices
NEERC 2013 Eastern Subregional
434
551
1996
Cipher Message 3
NEERC 2013 Eastern Subregional
204
1142
1997
Those are not the droids you're looking for
NEERC 2013 Eastern Subregional
469
510
1998
The old Padawan
NEERC 2013 Eastern Subregional
714
338
1999
The secret module
NEERC 2013 Eastern Subregional
26
6790
2012
About Grisha N.
NEERC 2014 Eastern Subregional
13471
16
2013
Neither shaken nor stirred
NEERC 2014 Eastern Subregional
244
864
2014
Zhenya moves from parents
NEERC 2014 Eastern Subregional
424
506
2015
Zhenya moves from the dormitory
NEERC 2014 Eastern Subregional
797
272
2016
Magic and Science
NEERC 2014 Eastern Subregional
18
7842
2017
Best of a bad lot
NEERC 2014 Eastern Subregional
166
1248
2018
The Debut Album
NEERC 2014 Eastern Subregional
2182
100
2019
Pair: normal and paranormal
NEERC 2014 Eastern Subregional
844
257
2020
Traffic Jam in Flower Town
NEERC 2014 Eastern Subregional
1531
142
2021
Scarily interesting!
NEERC 2014 Eastern Subregional
529
407
2022
Riding a Toad
NEERC 2014 Eastern Subregional
52
3541
2023
Donald is a postman
NEERC 2014 Eastern Subregional
5965
37
2074
Timus problems classifier
Qualification of Eastern Subregional 2015
200
884
2075
Take care of your eyebrows!
Qualification of Eastern Subregional 2015
55
2855
2076
Vasiana
Qualification of Eastern Subregional 2015
16
7137
2077
Reductions
Qualification of Eastern Subregional 2015
17
6873
Solved problems:
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