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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
4397
334
1054
Tower of Hanoi
NEERC 2000 Central Subregional
2284
642
1055
Combinations
NEERC 2000 Central Subregional
3555
413
1056
Centers of the Net
NEERC 2000 Central Subregional
2695
545
1057
Amount of Degrees
NEERC 2000 Central Subregional
2053
714
1058
Chocolate
NEERC 2000 Central Subregional
518
2784
1059
Expression
NEERC 2000 Central Subregional
2212
663
1133
Fibonacci Sequence
NEERC 2001 Central Subregional
2193
222
1134
Cards
NEERC 2001 Central Subregional
2513
194
1135
Recruits
NEERC 2001 Central Subregional
3032
161
1136
Parliament
NEERC 2001 Central Subregional
4934
99
1137
Bus Routes
NEERC 2001 Central Subregional
1492
326
1138
Integer Percentage
NEERC 2001 Central Subregional
2432
200
1139
City Blocks
NEERC 2001 Central Subregional
6343
77
1140
Swamp Incident
NEERC 2001 Central Subregional
1295
375
1158
Censored!
NEERC 2001 Northern Subregional
964
503
1159
Fence
NEERC 2001 Northern Subregional
644
749
1160
Network
NEERC 2001 Northern Subregional
3018
164
1161
Stripies
NEERC 2001 Northern Subregional
5377
91
1162
Currency Exchange
NEERC 2001 Northern Subregional
2130
229
1163
Chapaev
NEERC 2001 Northern Subregional
104
4296
1164
Fillword
NEERC 2001 Northern Subregional
2403
203
1165
Subnumber
NEERC 2001 Northern Subregional
525
915
1166
Funny Card Game
NEERC 2001 Northern Subregional
133
3507
1224
Spiral
NEERC 2002 Central Subregional
7499
66
1225
Flags
NEERC 2002 Central Subregional
13961
35
1226
esreveR redrO
NEERC 2002 Central Subregional
4393
113
1227
Rally Championship
NEERC 2002 Central Subregional
1648
299
1228
Array
NEERC 2002 Central Subregional
4632
107
1229
Strong Brickwork
NEERC 2002 Central Subregional
1299
379
1230
Introspective Program
NEERC 2002 Central Subregional
646
756
1231
Turing: One, Two, Three, …
NEERC 2002 Central Subregional
222
2136
1232
Asteroid Landing
NEERC 2002 Central Subregional
202
2338
1274
Fractional Arithmetic
NEERC 2003 Central Subregional
710
697
1275
Knights of the Round Table
NEERC 2003 Central Subregional
200
2390
1276
Train
NEERC 2003 Central Subregional
675
733
1277
Cops and Thieves
NEERC 2003 Central Subregional
626
789
1278
“… Connecting People”
NEERC 2003 Central Subregional
502
980
1279
Warehouse
NEERC 2003 Central Subregional
1184
420
1280
Topological Sorting
NEERC 2003 Central Subregional
3519
142
1281
River Basin
NEERC 2003 Central Subregional
349
1398
1282
Game Tree
NEERC 2003 Central Subregional
1485
336
1500
Pass Licenses
NEERC 2006 Eastern Subregional
736
633
1501
Sense of Beauty
NEERC 2006 Eastern Subregional
1776
264
1502
Domino Dots
NEERC 2006 Eastern Subregional
6440
73
1503
Polynomial
NEERC 2006 Eastern Subregional
261
1743
1504
Good Manners
NEERC 2006 Eastern Subregional
203
2218
1505
Oil Transfer
NEERC 2006 Eastern Subregional
153
2898
1506
Columns of Numbers
NEERC 2006 Eastern Subregional
3338
141
1507
Difficult Decision
NEERC 2006 Eastern Subregional
1062
441
1508
Japanese Puzzle
NEERC 2006 Eastern Subregional
278
1640
1509
Domino Recognition
NEERC 2006 Eastern Subregional
125
3499
1510
Order
NEERC 2006 Eastern Subregional
5446
87
1582
Bookmakers
NEERC 2007 Eastern Subregional
3631
120
1583
Cheese
NEERC 2007 Eastern Subregional
223
1878
1584
Pharaohs’ Secrets
NEERC 2007 Eastern Subregional
316
1342
1585
Penguins
NEERC 2007 Eastern Subregional
11531
38
1586
Threeprime Numbers
NEERC 2007 Eastern Subregional
3027
144
1587
Flying Pig
NEERC 2007 Eastern Subregional
534
804
1588
Jamaica
NEERC 2007 Eastern Subregional
1349
322
1589
Sokoban
NEERC 2007 Eastern Subregional
14
18234
1590
Bacon’s Cipher
NEERC 2007 Eastern Subregional
2293
190
1591
Abstract Thinking
NEERC 2007 Eastern Subregional
405
1055
1592
Chinese Watches
NEERC 2007 Eastern Subregional
721
599
1649
Abstractionism to the People
NEERC 2008 Eastern Subregional
49
6852
1650
Billionaires
NEERC 2008 Eastern Subregional
1929
209
1651
Shortest Subchain
NEERC 2008 Eastern Subregional
1164
344
1652
Banking Crisis
NEERC 2008 Eastern Subregional
139
2713
1653
Death Conveyor
NEERC 2008 Eastern Subregional
51
6628
1654
Cipher Message
NEERC 2008 Eastern Subregional
6917
58
1655
Somali Pirates
NEERC 2008 Eastern Subregional
207
1863
1656
Far Away Kingdom's Army
NEERC 2008 Eastern Subregional
1995
202
1657
Cube Snake
NEERC 2008 Eastern Subregional
260
1497
1658
Sum of Digits
NEERC 2008 Eastern Subregional
2037
198
1659
Regular Triangles
NEERC 2008 Eastern Subregional
621
641
1711
Code Names
NEERC 2009 Eastern Subregional
2880
130
1712
Cipher Grille
NEERC 2009 Eastern Subregional
4518
83
1713
Key Substrings
NEERC 2009 Eastern Subregional
597
618
1714
Mnemonics and Palindromes 2
NEERC 2009 Eastern Subregional
110
3125
1715
Another Ball Killer
NEERC 2009 Eastern Subregional
365
1000
1716
Alternative Solution
NEERC 2009 Eastern Subregional
485
758
1717
Eligibility Rules
NEERC 2009 Eastern Subregional
164
2155
1718
Rejudge
NEERC 2009 Eastern Subregional
1244
299
1719
Kill the Shaitan-Boss
NEERC 2009 Eastern Subregional
242
1488
1720
Summit Online Judge
NEERC 2009 Eastern Subregional
374
977
1721
Two Sides of the Same Coin
NEERC 2009 Eastern Subregional
650
568
1800
Murphy's Law
NEERC 2010 Eastern Subregional
2030
169
1801
The Revolution Cup
NEERC 2010 Eastern Subregional
52
5545
1802
Cube Puzzle
NEERC 2010 Eastern Subregional
157
2059
1803
The Czechs' Rifles
NEERC 2010 Eastern Subregional
465
724
1804
The Machinegunners in a Playoff
NEERC 2010 Eastern Subregional
865
393
1805
Chapaev and a Cipher Grille
NEERC 2010 Eastern Subregional
344
971
1806
Mobile Telegraphs
NEERC 2010 Eastern Subregional
1514
226
1807
Cartridges for Maxim
NEERC 2010 Eastern Subregional
231
1426
1808
Chapaev at the Planet Ocean
NEERC 2010 Eastern Subregional
171
1899
1809
Chapaev and Potatoes
NEERC 2010 Eastern Subregional
585
578
1885
Passenger Comfort
NEERC 2011 Eastern Subregional
1599
196
1886
Trip 2
NEERC 2011 Eastern Subregional
145
2036
1887
Frequent Flyer Card
NEERC 2011 Eastern Subregional
292
1045
1888
Pilot Work Experience
NEERC 2011 Eastern Subregional
698
446
1889
Airport Announcements
NEERC 2011 Eastern Subregional
1072
292
1890
Money out of Thin Air
NEERC 2011 Eastern Subregional
695
448
1891
Language Ocean
NEERC 2011 Eastern Subregional
457
676
1892
Morning in Koltsovo
NEERC 2011 Eastern Subregional
357
860
1893
A380
NEERC 2011 Eastern Subregional
5506
57
1894
Non-Flying Weather
NEERC 2011 Eastern Subregional
200
1502
1895
Steaks on Board
NEERC 2011 Eastern Subregional
140
2104
1910
Titan Ruins: Hidden Entrance
NEERC 2012 Eastern Subregional
8772
33
1911
Titan Ruins: Overtaking Fire
NEERC 2012 Eastern Subregional
55
4445
1912
Titan Ruins: Passing through Walls
NEERC 2012 Eastern Subregional
228
1214
1913
Titan Ruins: Alignment of Forces
NEERC 2012 Eastern Subregional
149
1817
1914
Titan Ruins: Serial Control
NEERC 2012 Eastern Subregional
57
4312
1915
Titan Ruins: Reconstruction of Bygones
NEERC 2012 Eastern Subregional
1371
209
1916
Titan Ruins: Waiting for Stability
NEERC 2012 Eastern Subregional
80
3210
1917
Titan Ruins: Deadly Accuracy
NEERC 2012 Eastern Subregional
1269
226
1918
Titan Ruins: Artful Manipulations
NEERC 2012 Eastern Subregional
309
906
1919
Titan Ruins: Transformation of Cylinders
NEERC 2012 Eastern Subregional
135
1992
1920
Titan Ruins: the Infinite Power of Magic
NEERC 2012 Eastern Subregional
406
694
1990
Podracing
NEERC 2013 Eastern Subregional
249
1013
1991
The battle near the swamp
NEERC 2013 Eastern Subregional
5758
45
1992
CVS
NEERC 2013 Eastern Subregional
696
371
1993
This cheeseburger you don't need
NEERC 2013 Eastern Subregional
1353
192
1994
The Emperor's plan
NEERC 2013 Eastern Subregional
247
1020
1995
Illegal spices
NEERC 2013 Eastern Subregional
444
578
1996
Cipher Message 3
NEERC 2013 Eastern Subregional
209
1198
1997
Those are not the droids you're looking for
NEERC 2013 Eastern Subregional
487
528
1998
The old Padawan
NEERC 2013 Eastern Subregional
738
351
1999
The secret module
NEERC 2013 Eastern Subregional
29
6724
2012
About Grisha N.
NEERC 2014 Eastern Subregional
14607
16
2013
Neither shaken nor stirred
NEERC 2014 Eastern Subregional
251
912
2014
Zhenya moves from parents
NEERC 2014 Eastern Subregional
446
522
2015
Zhenya moves from the dormitory
NEERC 2014 Eastern Subregional
821
286
2016
Magic and Science
NEERC 2014 Eastern Subregional
18
8499
2017
Best of a bad lot
NEERC 2014 Eastern Subregional
174
1293
2018
The Debut Album
NEERC 2014 Eastern Subregional
2342
101
2019
Pair: normal and paranormal
NEERC 2014 Eastern Subregional
867
271
2020
Traffic Jam in Flower Town
NEERC 2014 Eastern Subregional
1594
148
2021
Scarily interesting!
NEERC 2014 Eastern Subregional
547
427
2022
Riding a Toad
NEERC 2014 Eastern Subregional
57
3552
2023
Donald is a postman
NEERC 2014 Eastern Subregional
6384
37
2074
Timus problems classifier
Qualification of Eastern Subregional 2015
207
944
2075
Take care of your eyebrows!
Qualification of Eastern Subregional 2015
64
2767
2076
Vasiana
Qualification of Eastern Subregional 2015
16
7875
2077
Reductions
Qualification of Eastern Subregional 2015
18
7313
Solved problems:
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