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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
4433
341
1054
Tower of Hanoi
NEERC 2000 Central Subregional
2357
640
1055
Combinations
NEERC 2000 Central Subregional
3596
420
1056
Centers of the Net
NEERC 2000 Central Subregional
2746
550
1057
Amount of Degrees
NEERC 2000 Central Subregional
2108
716
1058
Chocolate
NEERC 2000 Central Subregional
528
2811
1059
Expression
NEERC 2000 Central Subregional
2231
676
1133
Fibonacci Sequence
NEERC 2001 Central Subregional
2239
224
1134
Cards
NEERC 2001 Central Subregional
2550
196
1135
Recruits
NEERC 2001 Central Subregional
3108
161
1136
Parliament
NEERC 2001 Central Subregional
5025
100
1137
Bus Routes
NEERC 2001 Central Subregional
1551
322
1138
Integer Percentage
NEERC 2001 Central Subregional
2476
202
1139
City Blocks
NEERC 2001 Central Subregional
6449
78
1140
Swamp Incident
NEERC 2001 Central Subregional
1315
379
1158
Censored!
NEERC 2001 Northern Subregional
985
506
1159
Fence
NEERC 2001 Northern Subregional
656
756
1160
Network
NEERC 2001 Northern Subregional
3476
146
1161
Stripies
NEERC 2001 Northern Subregional
5452
92
1162
Currency Exchange
NEERC 2001 Northern Subregional
2551
197
1163
Chapaev
NEERC 2001 Northern Subregional
113
4093
1164
Fillword
NEERC 2001 Northern Subregional
2437
206
1165
Subnumber
NEERC 2001 Northern Subregional
534
925
1166
Funny Card Game
NEERC 2001 Northern Subregional
133
3601
1224
Spiral
NEERC 2002 Central Subregional
7663
66
1225
Flags
NEERC 2002 Central Subregional
14420
35
1226
esreveR redrO
NEERC 2002 Central Subregional
4470
114
1227
Rally Championship
NEERC 2002 Central Subregional
1677
302
1228
Array
NEERC 2002 Central Subregional
4704
108
1229
Strong Brickwork
NEERC 2002 Central Subregional
1322
382
1230
Introspective Program
NEERC 2002 Central Subregional
659
761
1231
Turing: One, Two, Three, …
NEERC 2002 Central Subregional
225
2167
1232
Asteroid Landing
NEERC 2002 Central Subregional
204
2379
1274
Fractional Arithmetic
NEERC 2003 Central Subregional
736
691
1275
Knights of the Round Table
NEERC 2003 Central Subregional
205
2397
1276
Train
NEERC 2003 Central Subregional
690
736
1277
Cops and Thieves
NEERC 2003 Central Subregional
642
790
1278
“… Connecting People”
NEERC 2003 Central Subregional
509
993
1279
Warehouse
NEERC 2003 Central Subregional
1207
423
1280
Topological Sorting
NEERC 2003 Central Subregional
3630
142
1281
River Basin
NEERC 2003 Central Subregional
363
1381
1282
Game Tree
NEERC 2003 Central Subregional
1519
337
1500
Pass Licenses
NEERC 2006 Eastern Subregional
750
640
1501
Sense of Beauty
NEERC 2006 Eastern Subregional
1817
266
1502
Domino Dots
NEERC 2006 Eastern Subregional
6562
74
1503
Polynomial
NEERC 2006 Eastern Subregional
270
1738
1504
Good Manners
NEERC 2006 Eastern Subregional
208
2232
1505
Oil Transfer
NEERC 2006 Eastern Subregional
158
2896
1506
Columns of Numbers
NEERC 2006 Eastern Subregional
3465
140
1507
Difficult Decision
NEERC 2006 Eastern Subregional
1091
442
1508
Japanese Puzzle
NEERC 2006 Eastern Subregional
291
1616
1509
Domino Recognition
NEERC 2006 Eastern Subregional
129
3500
1510
Order
NEERC 2006 Eastern Subregional
5552
87
1582
Bookmakers
NEERC 2007 Eastern Subregional
3694
122
1583
Cheese
NEERC 2007 Eastern Subregional
230
1886
1584
Pharaohs’ Secrets
NEERC 2007 Eastern Subregional
319
1376
1585
Penguins
NEERC 2007 Eastern Subregional
11874
38
1586
Threeprime Numbers
NEERC 2007 Eastern Subregional
3127
144
1587
Flying Pig
NEERC 2007 Eastern Subregional
542
820
1588
Jamaica
NEERC 2007 Eastern Subregional
1376
327
1589
Sokoban
NEERC 2007 Eastern Subregional
19
15610
1590
Bacon’s Cipher
NEERC 2007 Eastern Subregional
2403
188
1591
Abstract Thinking
NEERC 2007 Eastern Subregional
414
1068
1592
Chinese Watches
NEERC 2007 Eastern Subregional
746
599
1649
Abstractionism to the People
NEERC 2008 Eastern Subregional
51
6890
1650
Billionaires
NEERC 2008 Eastern Subregional
2272
184
1651
Shortest Subchain
NEERC 2008 Eastern Subregional
1211
344
1652
Banking Crisis
NEERC 2008 Eastern Subregional
144
2729
1653
Death Conveyor
NEERC 2008 Eastern Subregional
54
6566
1654
Cipher Message
NEERC 2008 Eastern Subregional
7065
59
1655
Somali Pirates
NEERC 2008 Eastern Subregional
215
1868
1656
Far Away Kingdom's Army
NEERC 2008 Eastern Subregional
2041
205
1657
Cube Snake
NEERC 2008 Eastern Subregional
264
1534
1658
Sum of Digits
NEERC 2008 Eastern Subregional
2083
201
1659
Regular Triangles
NEERC 2008 Eastern Subregional
638
649
1711
Code Names
NEERC 2009 Eastern Subregional
2936
133
1712
Cipher Grille
NEERC 2009 Eastern Subregional
4594
85
1713
Key Substrings
NEERC 2009 Eastern Subregional
611
631
1714
Mnemonics and Palindromes 2
NEERC 2009 Eastern Subregional
112
3212
1715
Another Ball Killer
NEERC 2009 Eastern Subregional
378
1010
1716
Alternative Solution
NEERC 2009 Eastern Subregional
515
746
1717
Eligibility Rules
NEERC 2009 Eastern Subregional
166
2226
1718
Rejudge
NEERC 2009 Eastern Subregional
1271
306
1719
Kill the Shaitan-Boss
NEERC 2009 Eastern Subregional
253
1490
1720
Summit Online Judge
NEERC 2009 Eastern Subregional
387
987
1721
Two Sides of the Same Coin
NEERC 2009 Eastern Subregional
667
579
1800
Murphy's Law
NEERC 2010 Eastern Subregional
2108
171
1801
The Revolution Cup
NEERC 2010 Eastern Subregional
54
5646
1802
Cube Puzzle
NEERC 2010 Eastern Subregional
160
2126
1803
The Czechs' Rifles
NEERC 2010 Eastern Subregional
500
709
1804
The Machinegunners in a Playoff
NEERC 2010 Eastern Subregional
883
405
1805
Chapaev and a Cipher Grille
NEERC 2010 Eastern Subregional
348
1009
1806
Mobile Telegraphs
NEERC 2010 Eastern Subregional
1894
190
1807
Cartridges for Maxim
NEERC 2010 Eastern Subregional
233
1487
1808
Chapaev at the Planet Ocean
NEERC 2010 Eastern Subregional
174
1964
1809
Chapaev and Potatoes
NEERC 2010 Eastern Subregional
600
592
1885
Passenger Comfort
NEERC 2011 Eastern Subregional
1760
189
1886
Trip 2
NEERC 2011 Eastern Subregional
149
2100
1887
Frequent Flyer Card
NEERC 2011 Eastern Subregional
303
1067
1888
Pilot Work Experience
NEERC 2011 Eastern Subregional
717
459
1889
Airport Announcements
NEERC 2011 Eastern Subregional
1097
302
1890
Money out of Thin Air
NEERC 2011 Eastern Subregional
716
460
1891
Language Ocean
NEERC 2011 Eastern Subregional
468
698
1892
Morning in Koltsovo
NEERC 2011 Eastern Subregional
367
886
1893
A380
NEERC 2011 Eastern Subregional
5639
59
1894
Non-Flying Weather
NEERC 2011 Eastern Subregional
219
1458
1895
Steaks on Board
NEERC 2011 Eastern Subregional
144
2168
1910
Titan Ruins: Hidden Entrance
NEERC 2012 Eastern Subregional
9099
34
1911
Titan Ruins: Overtaking Fire
NEERC 2012 Eastern Subregional
57
4597
1912
Titan Ruins: Passing through Walls
NEERC 2012 Eastern Subregional
232
1273
1913
Titan Ruins: Alignment of Forces
NEERC 2012 Eastern Subregional
152
1901
1914
Titan Ruins: Serial Control
NEERC 2012 Eastern Subregional
58
4529
1915
Titan Ruins: Reconstruction of Bygones
NEERC 2012 Eastern Subregional
1398
219
1916
Titan Ruins: Waiting for Stability
NEERC 2012 Eastern Subregional
82
3347
1917
Titan Ruins: Deadly Accuracy
NEERC 2012 Eastern Subregional
1297
236
1918
Titan Ruins: Artful Manipulations
NEERC 2012 Eastern Subregional
316
945
1919
Titan Ruins: Transformation of Cylinders
NEERC 2012 Eastern Subregional
136
2109
1920
Titan Ruins: the Infinite Power of Magic
NEERC 2012 Eastern Subregional
419
718
1990
Podracing
NEERC 2013 Eastern Subregional
257
1056
1991
The battle near the swamp
NEERC 2013 Eastern Subregional
5944
47
1992
CVS
NEERC 2013 Eastern Subregional
731
381
1993
This cheeseburger you don't need
NEERC 2013 Eastern Subregional
1402
200
1994
The Emperor's plan
NEERC 2013 Eastern Subregional
258
1052
1995
Illegal spices
NEERC 2013 Eastern Subregional
457
604
1996
Cipher Message 3
NEERC 2013 Eastern Subregional
214
1259
1997
Those are not the droids you're looking for
NEERC 2013 Eastern Subregional
507
546
1998
The old Padawan
NEERC 2013 Eastern Subregional
754
369
1999
The secret module
NEERC 2013 Eastern Subregional
30
7051
2012
About Grisha N.
NEERC 2014 Eastern Subregional
15518
17
2013
Neither shaken nor stirred
NEERC 2014 Eastern Subregional
262
950
2014
Zhenya moves from parents
NEERC 2014 Eastern Subregional
468
541
2015
Zhenya moves from the dormitory
NEERC 2014 Eastern Subregional
866
295
2016
Magic and Science
NEERC 2014 Eastern Subregional
21
8335
2017
Best of a bad lot
NEERC 2014 Eastern Subregional
180
1360
2018
The Debut Album
NEERC 2014 Eastern Subregional
2525
102
2019
Pair: normal and paranormal
NEERC 2014 Eastern Subregional
888
288
2020
Traffic Jam in Flower Town
NEERC 2014 Eastern Subregional
1636
157
2021
Scarily interesting!
NEERC 2014 Eastern Subregional
564
450
2022
Riding a Toad
NEERC 2014 Eastern Subregional
58
3800
2023
Donald is a postman
NEERC 2014 Eastern Subregional
6662
39
2074
Timus problems classifier
Qualification of Eastern Subregional 2015
219
987
2075
Take care of your eyebrows!
Qualification of Eastern Subregional 2015
71
2791
2076
Vasiana
Qualification of Eastern Subregional 2015
18
8074
2077
Reductions
Qualification of Eastern Subregional 2015
19
7796
2190
Match of the Millennium
ICPC Ural Regional Contest Qualifier 2022
19
1415
2191
Piecewise Linear Functions
ICPC Ural Regional Contest Qualifier 2022
8
2271
2192
My Grandfather
ICPC Ural Regional Contest Qualifier 2022
21
1324
2193
Old Barabarian Rap
ICPC Ural Regional Contest Qualifier 2022
13
1778
2194
Snakes&Snakes
ICPC Ural Regional Contest Qualifier 2023
38
855
2195
Binary Trees
ICPC Ural Regional Contest Qualifier 2023
10
2052
2196
Apocalypse
ICPC Ural Regional Contest Qualifier 2023
8
2269
2197
Work is not a wolf; a wolf is to walk
ICPC Ural Regional Contest Qualifier 2024
8
2280
2198
Deep Understanding
ICPC Ural Regional Contest Qualifier 2024
19
1412
2199
Company Question
ICPC Ural Regional Contest Qualifier 2024
16
1578
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