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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
4398
335
1054
Tower of Hanoi
NEERC 2000 Central Subregional
2309
636
1055
Combinations
NEERC 2000 Central Subregional
3557
414
1056
Centers of the Net
NEERC 2000 Central Subregional
2700
545
1057
Amount of Degrees
NEERC 2000 Central Subregional
2079
706
1058
Chocolate
NEERC 2000 Central Subregional
518
2788
1059
Expression
NEERC 2000 Central Subregional
2213
664
1133
Fibonacci Sequence
NEERC 2001 Central Subregional
2196
222
1134
Cards
NEERC 2001 Central Subregional
2513
194
1135
Recruits
NEERC 2001 Central Subregional
3033
161
1136
Parliament
NEERC 2001 Central Subregional
4939
99
1137
Bus Routes
NEERC 2001 Central Subregional
1495
325
1138
Integer Percentage
NEERC 2001 Central Subregional
2433
200
1139
City Blocks
NEERC 2001 Central Subregional
6346
77
1140
Swamp Incident
NEERC 2001 Central Subregional
1296
375
1158
Censored!
NEERC 2001 Northern Subregional
964
503
1159
Fence
NEERC 2001 Northern Subregional
646
748
1160
Network
NEERC 2001 Northern Subregional
3231
153
1161
Stripies
NEERC 2001 Northern Subregional
5381
91
1162
Currency Exchange
NEERC 2001 Northern Subregional
2304
212
1163
Chapaev
NEERC 2001 Northern Subregional
103
4340
1164
Fillword
NEERC 2001 Northern Subregional
2404
203
1165
Subnumber
NEERC 2001 Northern Subregional
524
918
1166
Funny Card Game
NEERC 2001 Northern Subregional
132
3537
1224
Spiral
NEERC 2002 Central Subregional
7505
66
1225
Flags
NEERC 2002 Central Subregional
13977
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
4633
107
1229
Strong Brickwork
NEERC 2002 Central Subregional
1299
379
1230
Introspective Program
NEERC 2002 Central Subregional
646
757
1231
Turing: One, Two, Three, …
NEERC 2002 Central Subregional
221
2148
1232
Asteroid Landing
NEERC 2002 Central Subregional
201
2352
1274
Fractional Arithmetic
NEERC 2003 Central Subregional
717
691
1275
Knights of the Round Table
NEERC 2003 Central Subregional
199
2405
1276
Train
NEERC 2003 Central Subregional
675
734
1277
Cops and Thieves
NEERC 2003 Central Subregional
625
791
1278
“… Connecting People”
NEERC 2003 Central Subregional
501
984
1279
Warehouse
NEERC 2003 Central Subregional
1184
421
1280
Topological Sorting
NEERC 2003 Central Subregional
3537
142
1281
River Basin
NEERC 2003 Central Subregional
348
1404
1282
Game Tree
NEERC 2003 Central Subregional
1486
336
1500
Pass Licenses
NEERC 2006 Eastern Subregional
737
633
1501
Sense of Beauty
NEERC 2006 Eastern Subregional
1776
265
1502
Domino Dots
NEERC 2006 Eastern Subregional
6444
73
1503
Polynomial
NEERC 2006 Eastern Subregional
260
1752
1504
Good Manners
NEERC 2006 Eastern Subregional
202
2231
1505
Oil Transfer
NEERC 2006 Eastern Subregional
153
2902
1506
Columns of Numbers
NEERC 2006 Eastern Subregional
3340
141
1507
Difficult Decision
NEERC 2006 Eastern Subregional
1062
441
1508
Japanese Puzzle
NEERC 2006 Eastern Subregional
277
1648
1509
Domino Recognition
NEERC 2006 Eastern Subregional
125
3504
1510
Order
NEERC 2006 Eastern Subregional
5451
87
1582
Bookmakers
NEERC 2007 Eastern Subregional
3633
120
1583
Cheese
NEERC 2007 Eastern Subregional
223
1881
1584
Pharaohs’ Secrets
NEERC 2007 Eastern Subregional
315
1349
1585
Penguins
NEERC 2007 Eastern Subregional
11549
38
1586
Threeprime Numbers
NEERC 2007 Eastern Subregional
3029
144
1587
Flying Pig
NEERC 2007 Eastern Subregional
533
807
1588
Jamaica
NEERC 2007 Eastern Subregional
1352
322
1589
Sokoban
NEERC 2007 Eastern Subregional
15
17534
1590
Bacon’s Cipher
NEERC 2007 Eastern Subregional
2297
190
1591
Abstract Thinking
NEERC 2007 Eastern Subregional
405
1056
1592
Chinese Watches
NEERC 2007 Eastern Subregional
721
600
1649
Abstractionism to the People
NEERC 2008 Eastern Subregional
48
6984
1650
Billionaires
NEERC 2008 Eastern Subregional
2072
195
1651
Shortest Subchain
NEERC 2008 Eastern Subregional
1166
344
1652
Banking Crisis
NEERC 2008 Eastern Subregional
139
2719
1653
Death Conveyor
NEERC 2008 Eastern Subregional
50
6751
1654
Cipher Message
NEERC 2008 Eastern Subregional
6929
58
1655
Somali Pirates
NEERC 2008 Eastern Subregional
206
1875
1656
Far Away Kingdom's Army
NEERC 2008 Eastern Subregional
1997
202
1657
Cube Snake
NEERC 2008 Eastern Subregional
259
1506
1658
Sum of Digits
NEERC 2008 Eastern Subregional
2037
198
1659
Regular Triangles
NEERC 2008 Eastern Subregional
622
641
1711
Code Names
NEERC 2009 Eastern Subregional
2879
130
1712
Cipher Grille
NEERC 2009 Eastern Subregional
4521
83
1713
Key Substrings
NEERC 2009 Eastern Subregional
598
618
1714
Mnemonics and Palindromes 2
NEERC 2009 Eastern Subregional
109
3159
1715
Another Ball Killer
NEERC 2009 Eastern Subregional
365
1002
1716
Alternative Solution
NEERC 2009 Eastern Subregional
486
758
1717
Eligibility Rules
NEERC 2009 Eastern Subregional
163
2173
1718
Rejudge
NEERC 2009 Eastern Subregional
1243
300
1719
Kill the Shaitan-Boss
NEERC 2009 Eastern Subregional
241
1497
1720
Summit Online Judge
NEERC 2009 Eastern Subregional
375
976
1721
Two Sides of the Same Coin
NEERC 2009 Eastern Subregional
650
569
1800
Murphy's Law
NEERC 2010 Eastern Subregional
2031
169
1801
The Revolution Cup
NEERC 2010 Eastern Subregional
52
5559
1802
Cube Puzzle
NEERC 2010 Eastern Subregional
156
2076
1803
The Czechs' Rifles
NEERC 2010 Eastern Subregional
466
724
1804
The Machinegunners in a Playoff
NEERC 2010 Eastern Subregional
865
394
1805
Chapaev and a Cipher Grille
NEERC 2010 Eastern Subregional
344
974
1806
Mobile Telegraphs
NEERC 2010 Eastern Subregional
1685
203
1807
Cartridges for Maxim
NEERC 2010 Eastern Subregional
230
1436
1808
Chapaev at the Planet Ocean
NEERC 2010 Eastern Subregional
171
1904
1809
Chapaev and Potatoes
NEERC 2010 Eastern Subregional
586
578
1885
Passenger Comfort
NEERC 2011 Eastern Subregional
1600
197
1886
Trip 2
NEERC 2011 Eastern Subregional
144
2055
1887
Frequent Flyer Card
NEERC 2011 Eastern Subregional
291
1051
1888
Pilot Work Experience
NEERC 2011 Eastern Subregional
698
447
1889
Airport Announcements
NEERC 2011 Eastern Subregional
1073
292
1890
Money out of Thin Air
NEERC 2011 Eastern Subregional
694
449
1891
Language Ocean
NEERC 2011 Eastern Subregional
457
678
1892
Morning in Koltsovo
NEERC 2011 Eastern Subregional
356
865
1893
A380
NEERC 2011 Eastern Subregional
5514
57
1894
Non-Flying Weather
NEERC 2011 Eastern Subregional
199
1514
1895
Steaks on Board
NEERC 2011 Eastern Subregional
139
2124
1910
Titan Ruins: Hidden Entrance
NEERC 2012 Eastern Subregional
8795
33
1911
Titan Ruins: Overtaking Fire
NEERC 2012 Eastern Subregional
54
4529
1912
Titan Ruins: Passing through Walls
NEERC 2012 Eastern Subregional
227
1223
1913
Titan Ruins: Alignment of Forces
NEERC 2012 Eastern Subregional
149
1823
1914
Titan Ruins: Serial Control
NEERC 2012 Eastern Subregional
56
4391
1915
Titan Ruins: Reconstruction of Bygones
NEERC 2012 Eastern Subregional
1371
210
1916
Titan Ruins: Waiting for Stability
NEERC 2012 Eastern Subregional
79
3257
1917
Titan Ruins: Deadly Accuracy
NEERC 2012 Eastern Subregional
1272
226
1918
Titan Ruins: Artful Manipulations
NEERC 2012 Eastern Subregional
308
911
1919
Titan Ruins: Transformation of Cylinders
NEERC 2012 Eastern Subregional
134
2013
1920
Titan Ruins: the Infinite Power of Magic
NEERC 2012 Eastern Subregional
406
697
1990
Podracing
NEERC 2013 Eastern Subregional
248
1020
1991
The battle near the swamp
NEERC 2013 Eastern Subregional
5772
46
1992
CVS
NEERC 2013 Eastern Subregional
696
373
1993
This cheeseburger you don't need
NEERC 2013 Eastern Subregional
1352
193
1994
The Emperor's plan
NEERC 2013 Eastern Subregional
246
1028
1995
Illegal spices
NEERC 2013 Eastern Subregional
443
581
1996
Cipher Message 3
NEERC 2013 Eastern Subregional
208
1207
1997
Those are not the droids you're looking for
NEERC 2013 Eastern Subregional
487
530
1998
The old Padawan
NEERC 2013 Eastern Subregional
737
352
1999
The secret module
NEERC 2013 Eastern Subregional
28
6927
2012
About Grisha N.
NEERC 2014 Eastern Subregional
14645
16
2013
Neither shaken nor stirred
NEERC 2014 Eastern Subregional
251
916
2014
Zhenya moves from parents
NEERC 2014 Eastern Subregional
446
524
2015
Zhenya moves from the dormitory
NEERC 2014 Eastern Subregional
823
287
2016
Magic and Science
NEERC 2014 Eastern Subregional
18
8534
2017
Best of a bad lot
NEERC 2014 Eastern Subregional
174
1299
2018
The Debut Album
NEERC 2014 Eastern Subregional
2368
100
2019
Pair: normal and paranormal
NEERC 2014 Eastern Subregional
867
272
2020
Traffic Jam in Flower Town
NEERC 2014 Eastern Subregional
1594
149
2021
Scarily interesting!
NEERC 2014 Eastern Subregional
547
429
2022
Riding a Toad
NEERC 2014 Eastern Subregional
56
3621
2023
Donald is a postman
NEERC 2014 Eastern Subregional
6409
37
2074
Timus problems classifier
Qualification of Eastern Subregional 2015
206
953
2075
Take care of your eyebrows!
Qualification of Eastern Subregional 2015
63
2819
2076
Vasiana
Qualification of Eastern Subregional 2015
16
7915
2077
Reductions
Qualification of Eastern Subregional 2015
17
7622
Solved problems:
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