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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
4261
321
1054
Tower of Hanoi
NEERC 2000 Central Subregional
2089
653
1055
Combinations
NEERC 2000 Central Subregional
3428
398
1056
Computer Net
NEERC 2000 Central Subregional
2578
529
1057
Amount of Degrees
NEERC 2000 Central Subregional
1948
700
1058
Chocolate
NEERC 2000 Central Subregional
472
2835
1059
Expression
NEERC 2000 Central Subregional
2149
634
1133
Fibonacci Sequence
NEERC 2001 Central Subregional
2075
218
1134
Cards
NEERC 2001 Central Subregional
2522
180
1135
Recruits
NEERC 2001 Central Subregional
2797
162
1136
Parliament
NEERC 2001 Central Subregional
4598
99
1137
Bus Routes
NEERC 2001 Central Subregional
1318
343
1138
Integer Percentage
NEERC 2001 Central Subregional
2286
198
1139
City Blocks
NEERC 2001 Central Subregional
5896
77
1140
Swamp Incident
NEERC 2001 Central Subregional
1234
366
1158
Censored!
NEERC 2001 Northern Subregional
903
500
1159
Fence
NEERC 2001 Northern Subregional
620
724
1160
Network
NEERC 2001 Northern Subregional
1706
270
1161
Stripies
NEERC 2001 Northern Subregional
5012
91
1162
Currency Exchange
NEERC 2001 Northern Subregional
1104
410
1163
Chapaev
NEERC 2001 Northern Subregional
226
1933
1164
Fillword
NEERC 2001 Northern Subregional
2296
198
1165
Subnumber
NEERC 2001 Northern Subregional
507
882
1166
Funny Card Game
NEERC 2001 Northern Subregional
121
3579
1224
Spiral
NEERC 2002 Central Subregional
6875
67
1225
Flags
NEERC 2002 Central Subregional
12423
37
1226
esreveR redrO
NEERC 2002 Central Subregional
4167
111
1227
Rally Championship
NEERC 2002 Central Subregional
1506
305
1228
Array
NEERC 2002 Central Subregional
4447
104
1229
Strong Brickwork
NEERC 2002 Central Subregional
1234
372
1230
Introspective Program
NEERC 2002 Central Subregional
621
733
1231
Turing: One, Two, Three, …
NEERC 2002 Central Subregional
207
2131
1232
Asteroid Landing
NEERC 2002 Central Subregional
186
2359
1274
Fractional Arithmetic
NEERC 2003 Central Subregional
678
682
1275
Knights of the Round Table
NEERC 2003 Central Subregional
162
2728
1276
Train
NEERC 2003 Central Subregional
597
773
1277
Cops and Thieves
NEERC 2003 Central Subregional
589
783
1278
“… Connecting People”
NEERC 2003 Central Subregional
467
984
1279
Warehouse
NEERC 2003 Central Subregional
1117
416
1280
Topological Sorting
NEERC 2003 Central Subregional
3270
143
1281
River Basin
NEERC 2003 Central Subregional
327
1392
1282
Game Tree
NEERC 2003 Central Subregional
1392
335
1500
Pass Licenses
NEERC 2006 Eastern Subregional
685
630
1501
Sense of Beauty
NEERC 2006 Eastern Subregional
1642
265
1502
Domino Dots
NEERC 2006 Eastern Subregional
5913
74
1503
Polynomial
NEERC 2006 Eastern Subregional
229
1831
1504
Good Manners
NEERC 2006 Eastern Subregional
177
2341
1505
Oil Transfer
NEERC 2006 Eastern Subregional
135
3018
1506
Columns of Numbers
NEERC 2006 Eastern Subregional
2845
153
1507
Difficult Decision
NEERC 2006 Eastern Subregional
1005
431
1508
Japanese Puzzle
NEERC 2006 Eastern Subregional
244
1723
1509
Domino Recognition
NEERC 2006 Eastern Subregional
106
3773
1510
Order
NEERC 2006 Eastern Subregional
4985
88
1582
Bookmakers
NEERC 2007 Eastern Subregional
3452
116
1583
Cheese
NEERC 2007 Eastern Subregional
209
1829
1584
Pharaohs’ Secrets
NEERC 2007 Eastern Subregional
305
1272
1585
Penguins
NEERC 2007 Eastern Subregional
10013
40
1586
Threeprime Numbers
NEERC 2007 Eastern Subregional
2674
149
1587
Flying Pig
NEERC 2007 Eastern Subregional
496
792
1588
Jamaica
NEERC 2007 Eastern Subregional
1267
314
1589
Sokoban
NEERC 2007 Eastern Subregional
9
21086
1590
Bacon’s Cipher
NEERC 2007 Eastern Subregional
1873
213
1591
Abstract Thinking
NEERC 2007 Eastern Subregional
381
1025
1592
Chinese Watches
NEERC 2007 Eastern Subregional
671
588
1649
Abstractionism to the People
NEERC 2008 Eastern Subregional
42
7022
1650
Billionaires
NEERC 2008 Eastern Subregional
855
422
1651
Shortest Subchain
NEERC 2008 Eastern Subregional
1060
341
1652
Banking Crisis
NEERC 2008 Eastern Subregional
132
2571
1653
Death Conveyor
NEERC 2008 Eastern Subregional
44
6761
1654
Cipher Message
NEERC 2008 Eastern Subregional
6181
59
1655
Somali Pirates
NEERC 2008 Eastern Subregional
178
1942
1656
Far Away Kingdom's Army
NEERC 2008 Eastern Subregional
1836
198
1657
Cube Snake
NEERC 2008 Eastern Subregional
246
1426
1658
Sum of Digits
NEERC 2008 Eastern Subregional
1525
238
1659
Regular Triangles
NEERC 2008 Eastern Subregional
586
613
1711
Code Names
NEERC 2009 Eastern Subregional
2666
125
1712
Cipher Grille
NEERC 2009 Eastern Subregional
4225
79
1713
Key Substrings
NEERC 2009 Eastern Subregional
557
589
1714
Mnemonics and Palindromes 2
NEERC 2009 Eastern Subregional
106
2879
1715
Another Ball Killer
NEERC 2009 Eastern Subregional
332
976
1716
Alternative Solution
NEERC 2009 Eastern Subregional
428
762
1717
Eligibility Rules
NEERC 2009 Eastern Subregional
125
2474
1718
Rejudge
NEERC 2009 Eastern Subregional
1174
282
1719
Kill the Shaitan-Boss
NEERC 2009 Eastern Subregional
229
1397
1720
Summit Online Judge
NEERC 2009 Eastern Subregional
351
925
1721
Two Sides of the Same Coin
NEERC 2009 Eastern Subregional
603
545
1800
Murphy's Law
NEERC 2010 Eastern Subregional
1652
181
1801
The Revolution Cup
NEERC 2010 Eastern Subregional
47
5274
1802
Cube Puzzle
NEERC 2010 Eastern Subregional
149
1891
1803
The Czechs' Rifles
NEERC 2010 Eastern Subregional
444
662
1804
The Machinegunners in a Playoff
NEERC 2010 Eastern Subregional
825
360
1805
Chapaev and a Cipher Grille
NEERC 2010 Eastern Subregional
330
884
1806
Mobile Telegraphs
NEERC 2010 Eastern Subregional
567
521
1807
Cartridges for Maxim
NEERC 2010 Eastern Subregional
212
1354
1808
Chapaev at the Planet Ocean
NEERC 2010 Eastern Subregional
161
1758
1809
Chapaev and Potatoes
NEERC 2010 Eastern Subregional
545
542
1885
Passenger Comfort
NEERC 2011 Eastern Subregional
1363
197
1886
Trip 2
NEERC 2011 Eastern Subregional
135
1866
1887
Frequent Flyer Card
NEERC 2011 Eastern Subregional
262
995
1888
Pilot Work Experience
NEERC 2011 Eastern Subregional
634
420
1889
Airport Announcements
NEERC 2011 Eastern Subregional
978
274
1890
Money out of Thin Air
NEERC 2011 Eastern Subregional
591
450
1891
Language Ocean
NEERC 2011 Eastern Subregional
432
612
1892
Morning in Koltsovo
NEERC 2011 Eastern Subregional
338
777
1893
A380
NEERC 2011 Eastern Subregional
4921
55
1894
Non-Flying Weather
NEERC 2011 Eastern Subregional
144
1757
1895
Steaks on Board
NEERC 2011 Eastern Subregional
113
2199
1910
Titan Ruins: Hidden Entrance
NEERC 2012 Eastern Subregional
7331
33
1911
Titan Ruins: Overtaking Fire
NEERC 2012 Eastern Subregional
53
3844
1912
Titan Ruins: Passing through Walls
NEERC 2012 Eastern Subregional
254
917
1913
Titan Ruins: Alignment of Forces
NEERC 2012 Eastern Subregional
141
1604
1914
Titan Ruins: Serial Control
NEERC 2012 Eastern Subregional
47
4248
1915
Titan Ruins: Reconstruction of Bygones
NEERC 2012 Eastern Subregional
1256
191
1916
Titan Ruins: Waiting for Stability
NEERC 2012 Eastern Subregional
73
2917
1917
Titan Ruins: Deadly Accuracy
NEERC 2012 Eastern Subregional
1183
203
1918
Titan Ruins: Artful Manipulations
NEERC 2012 Eastern Subregional
289
810
1919
Titan Ruins: Transformation of Cylinders
NEERC 2012 Eastern Subregional
121
1848
1920
Titan Ruins: the Infinite Power of Magic
NEERC 2012 Eastern Subregional
389
607
1990
Podracing
NEERC 2013 Eastern Subregional
237
865
1991
The battle near the swamp
NEERC 2013 Eastern Subregional
4806
44
1992
CVS
NEERC 2013 Eastern Subregional
641
328
1993
This cheeseburger you don't need
NEERC 2013 Eastern Subregional
1195
177
1994
The Emperor's plan
NEERC 2013 Eastern Subregional
231
887
1995
Illegal spices
NEERC 2013 Eastern Subregional
417
501
1996
Cipher Message 3
NEERC 2013 Eastern Subregional
197
1033
1997
Those are not the droids you're looking for
NEERC 2013 Eastern Subregional
455
460
1998
The old Padawan
NEERC 2013 Eastern Subregional
680
310
1999
The secret module
NEERC 2013 Eastern Subregional
26
5937
2012
About Grisha N.
NEERC 2014 Eastern Subregional
11210
17
2013
Neither shaken nor stirred
NEERC 2014 Eastern Subregional
229
786
2014
Zhenya moves from parents
NEERC 2014 Eastern Subregional
392
467
2015
Zhenya moves from the dormitory
NEERC 2014 Eastern Subregional
743
249
2016
Magic and Science
NEERC 2014 Eastern Subregional
17
6957
2017
Best of a bad lot
NEERC 2014 Eastern Subregional
155
1139
2018
The Debut Album
NEERC 2014 Eastern Subregional
1939
96
2019
Pair: normal and paranormal
NEERC 2014 Eastern Subregional
784
237
2020
Traffic Jam in Flower Town
NEERC 2014 Eastern Subregional
1405
133
2021
Scarily interesting!
NEERC 2014 Eastern Subregional
495
372
2022
Riding a Toad
NEERC 2014 Eastern Subregional
49
3184
2023
Donald is a postman
NEERC 2014 Eastern Subregional
5232
36
2074
Timus problems classifier
Qualification of Eastern Subregional 2015
188
770
2075
Take care of your eyebrows!
Qualification of Eastern Subregional 2015
46
2723
2076
Vasiana
Qualification of Eastern Subregional 2015
13
6629
2077
Reductions
Qualification of Eastern Subregional 2015
17
5647
Solved problems:
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