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Problem set. School Contests
Solved problems:
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ID
Title
Source
Authors
Difficulty
1293
Eniya
Spring School Contest 2004
34534
15
1409
Two Gangsters
Autumn School Contest 2005
33086
15
1264
Workdays
Autumn School Contest 2003
23715
21
1025
Democracy in Danger
Autumn School Contest 2000
22774
67
1083
Factorials!!!
Spring School Contest 2001
19817
67
1197
Lonesome Knight
Spring School Contest 2002
17740
28
1877
Bicycle Codes
Ural Regional School Programming Contest 2011
16824
19
1020
Rope
Autumn School Contest 2000
15337
99
1209
1, 10, 100, 1000...
Autumn School Contest 2002
14456
34
1787
Turn for MEGA
Ural Regional School Programming Contest 2010
14049
25
1639
Chocolate 2
Autumn School Contest 2008
12707
32
1086
Cryptography
Spring School Contest 2001
12622
105
2001
Mathematicians and Berries
Ural Regional School Programming Contest 2013
12322
21
1263
Elections
Autumn School Contest 2003
11771
43
1581
Teamwork
Autumn School Contest 2007
10947
40
1327
Fuses
Autumn School Contest 2004
10909
47
1022
Genealogical Tree
Autumn School Contest 2000
10839
140
1082
Gaby Ivanushka
Spring School Contest 2001
10794
123
1880
Psych Up's Eigenvalues
Ural Regional School Programming Contest 2011
10626
30
1021
Sacrament of the Sum
Autumn School Contest 2000
10393
146
1349
Farm
Spring School Contest 2005
10101
50
1493
One Step from Happiness
Autumn School Contest 2006
10086
47
1026
Questions and Answers
Autumn School Contest 2000
9738
155
1496
Spammer
Autumn School Contest 2006
9726
49
1196
History Exam
Spring School Contest 2002
9207
53
1084
Goat in the Garden
Spring School Contest 2001
8932
149
2066
Simple Expression
Ural Regional School Programming Contest 2015
7892
27
1924
Four Imps
Ural Regional School Programming Contest 2012
7830
37
1296
Hyperjump
Spring School Contest 2004
7757
65
1023
Buttons
Autumn School Contest 2000
7123
212
1119
Metro
Autumn School Contest 2001
6929
71
1290
Sabotage
Spring School Contest 2004
6357
79
1404
Easy to Hack!
Autumn School Contest 2005
6351
80
1297
Palindrome
Spring School Contest 2004
6181
82
1723
Sandro's Book
Ural Regional School Programming Contest 2009
6116
61
1194
Handshakes
Spring School Contest 2002
6005
82
1876
Centipede's Morning
Ural Regional School Programming Contest 2011
5999
53
1120
Sum of Sequential Numbers
Autumn School Contest 2001
5610
87
1881
Long problem statement
Ural Regional School Programming Contest 2011
5337
59
1330
Intervals
Autumn School Contest 2004
5270
96
1353
Milliard Vasya's Function
Spring School Contest 2005
4917
104
1494
Monobilliards
Autumn School Contest 2006
4917
96
1087
The Time to Take Stones
Spring School Contest 2001
4900
271
1214
Strange Procedure
Autumn School Contest 2002
4891
101
1024
Permutations
Autumn School Contest 2000
4814
314
1118
Nontrivial Numbers
Autumn School Contest 2001
4736
103
1260
Nudnik Photographer
Autumn School Contest 2003
4541
110
1192
Ball in a Dream
Spring School Contest 2002
4540
108
1925
British Scientists Save the World
Ural Regional School Programming Contest 2012
4387
66
1792
Hamming Code
Ural Regional School Programming Contest 2010
4272
81
1642
1D Maze
Autumn School Contest 2008
4240
95
1336
Problem of Ben Betsalel
Autumn School Contest 2004
4182
121
1573
Alchemy
Autumn School Contest 2007
4129
106
1644
A Whole Lot of Walnuts
Autumn School Contest 2008
4121
98
1123
Salary
Autumn School Contest 2001
4043
121
2025
Line Fighting
Ural Regional School Programming Contest 2014
4038
59
1402
Cocktails
Autumn School Contest 2005
3975
128
1352
Mersenne Primes
Spring School Contest 2005
3913
130
2002
Test Task
Ural Regional School Programming Contest 2013
3820
68
1354
Palindrome. Again Palindrome
Spring School Contest 2005
3670
139
1731
Dill
Ural Regional School Programming Contest 2009
3665
102
1295
Crazy Notions
Spring School Contest 2004
3343
151
2035
Another Dress Rehearsal
Ural Regional School Programming Contest 2014
3303
72
1786
Sandro's Biography
Ural Regional School Programming Contest 2010
3275
105
1796
Amusement Park
Ural Regional School Programming Contest 2010
3258
106
1210
Kind Spirits
Autumn School Contest 2002
3047
162
1572
Yekaterinozavodsk Great Well
Autumn School Contest 2007
3038
144
1576
Telephone Tariffs
Autumn School Contest 2007
3021
145
2005
Taxi for Programmers
Ural Regional School Programming Contest 2013
2973
88
2031
Overturned Numbers
Ural Regional School Programming Contest 2014
2934
81
1213
Cockroaches!
Autumn School Contest 2002
2933
169
1726
Visits
Ural Regional School Programming Contest 2009
2901
129
1401
Gamers
Autumn School Contest 2005
2871
178
1335
White Thesis
Autumn School Contest 2004
2817
180
1348
Goat in the Garden 2
Spring School Contest 2005
2722
187
1193
Queue at the Exam
Spring School Contest 2002
2716
180
1725
Sold Out!
Ural Regional School Programming Contest 2009
2716
138
2011
Long Statement
Ural Regional School Programming Contest 2013
2701
97
1027
D++ Again
Autumn School Contest 2000
2425
622
1355
Bald Spot Revisited
Spring School Contest 2005
2408
211
1490
Fire Circle
Autumn School Contest 2006
2397
197
2033
Devices
Ural Regional School Programming Contest 2014
2345
101
1640
Circle of Winter
Autumn School Contest 2008
2341
173
1333
Genie Bomber 2
Autumn School Contest 2004
2337
216
1491
Unreal Story
Autumn School Contest 2006
2260
209
1788
On the Benefits of Umbrellas
Ural Regional School Programming Contest 2010
2227
155
1298
Knight
Spring School Contest 2004
2168
232
1085
Meeting
Spring School Contest 2001
2151
616
2068
Game of Nuts
Ural Regional School Programming Contest 2015
2124
100
2010
Sasha the Young Grandmaster
Ural Regional School Programming Contest 2013
2076
126
1645
Ski Race
Autumn School Contest 2008
2052
197
2111
Plato
University academic school olympiad in informatics 2019
2011
66
1191
Catch the thief!
Spring School Contest 2002
1997
245
1122
Game
Autumn School Contest 2001
1975
247
1727
Znaika's Magic Numbers
Ural Regional School Programming Contest 2009
1910
196
1195
Ouths and Crosses
Spring School Contest 2002
1886
259
1088
Ilya Murometz
Spring School Contest 2001
1807
733
1794
Masterpieces of World Architecture
Ural Regional School Programming Contest 2010
1785
193
1117
Hierarchy
Autumn School Contest 2001
1764
276
2000
Grand Theft Array V
Ural Regional School Programming Contest 2013
1744
150
1930
Ivan's Car
Ural Regional School Programming Contest 2012
1737
166
1356
Something Easier
Spring School Contest 2005
1718
295
1874
Football Goal
Ural Regional School Programming Contest 2011
1657
190
1215
Exactness of Projectile Hit
Autumn School Contest 2002
1652
298
1789
Searching for the Dodecahedron
Ural Regional School Programming Contest 2010
1635
210
1294
Mars Satellites
Spring School Contest 2004
1608
312
1211
Collective Guarantee
Autumn School Contest 2002
1597
309
1089
Verification with the Dictionary
Spring School Contest 2001
1594
830
1190
Bar of Chocolate
Spring School Contest 2002
1591
307
1497
Cutting a Square
Autumn School Contest 2006
1580
298
1878
Rubinchik's Cube
Ural Regional School Programming Contest 2011
1527
206
1261
Tips
Autumn School Contest 2003
1508
331
1116
Piecewise Constant Function
Autumn School Contest 2001
1482
328
1406
Next Number
Autumn School Contest 2005
1478
344
1403
Courier
Autumn School Contest 2005
1453
350
1795
Husband in a Shop
Ural Regional School Programming Contest 2010
1414
243
1121
Branches
Autumn School Contest 2001
1404
346
1495
One-two, One-two 2
Autumn School Contest 2006
1393
338
1292
Mars Space Stations
Spring School Contest 2004
1330
377
1407
One-two, One-two
Autumn School Contest 2005
1325
383
1291
Gear-wheels
Spring School Contest 2004
1304
384
1350
Canteen
Spring School Contest 2005
1289
393
1262
Pseudo-Roman Number
Autumn School Contest 2003
1286
388
1259
How to Become Star?
Autumn School Contest 2003
1268
393
1574
Mathematicians and brackets
Autumn School Contest 2007
1239
352
1489
Points on a Parallelepiped
Autumn School Contest 2006
1208
390
2138
The Good, the Bad and the Ugly
Ural School Programming Contest 2019
1200
101
1258
Pool
Autumn School Contest 2003
1196
416
1329
Galactic History
Autumn School Contest 2004
1093
461
2072
Kirill the Gardener 3
Ural Regional School Programming Contest 2015
1076
197
1648
Yachts
Autumn School Contest 2008
1063
378
2069
Hard Rock
Ural Regional School Programming Contest 2015
1030
206
2142
Magic
Ural School Programming Contest 2019
1029
118
1212
Battleship
Autumn School Contest 2002
1008
487
2070
Interesting Numbers
Ural Regional School Programming Contest 2015
968
219
1351
Good Gnusmas – Dead Gnusmas
Spring School Contest 2005
966
523
2073
Log Files
Ural Regional School Programming Contest 2015
964
220
1643
Attack of the Dark Fortress
Autumn School Contest 2008
954
421
1922
Superhero Team
Ural Regional School Programming Contest 2012
946
303
1334
Checkers
Autumn School Contest 2004
934
538
1358
Cables
Spring School Contest 2005
930
543
1400
Cellular Characters
Autumn School Contest 2005
928
546
1577
E-mail
Autumn School Contest 2007
924
471
1793
Tray 2
Ural Regional School Programming Contest 2010
889
385
2149
Pigeonhole Principle
Ural School Programming Contest 2019
888
136
1579
Coat Transportation
Autumn School Contest 2007
886
491
1873
GOV Chronicles
Ural Regional School Programming Contest 2011
886
354
2034
Caravans
Ural Regional School Programming Contest 2014
814
289
1641
Duties
Autumn School Contest 2008
808
496
1332
Genie Bomber
Autumn School Contest 2004
807
622
2062
Ambitious Experiment
Ural Regional School Programming Contest 2015
783
270
1929
Teddybears are not for Everyone
Ural Regional School Programming Contest 2012
777
368
2003
Simple Magic
Ural Regional School Programming Contest 2013
754
343
2024
Adventure Time
Ural Regional School Programming Contest 2014
742
317
2065
Different Sums
Ural Regional School Programming Contest 2015
726
291
1728
Curse on Team.GOV
Ural Regional School Programming Contest 2009
712
520
1405
Goat in the Garden 5
Autumn School Contest 2005
708
713
2067
Friends and Berries
Ural Regional School Programming Contest 2015
696
303
2115
The Knowledge Day
University academic school olympiad in informatics 2019
653
202
1729
Dead Man's Chest
Ural Regional School Programming Contest 2009
598
617
1724
Origin of Man Clarified
Ural Regional School Programming Contest 2009
572
645
1923
Scary Politics
Ural Regional School Programming Contest 2012
537
529
2144
Cleaning the Room
Ural School Programming Contest 2019
534
225
1498
Stroke at Full Speed
Autumn School Contest 2006
524
889
2063
Black and White
Ural Regional School Programming Contest 2015
511
411
2141
Sasha Vilkin
Ural School Programming Contest 2019
504
238
1331
Vladislava
Autumn School Contest 2004
500
996
1575
Yekaterinburg Subway 2
Autumn School Contest 2007
499
864
1578
Mammoth Hunt
Autumn School Contest 2007
494
873
1580
Dean's Debts
Autumn School Contest 2007
489
881
1884
Way to the University
Ural Regional School Programming Contest 2011
480
647
1647
Divide an Island!
Autumn School Contest 2008
479
830
2030
Awesome Backup System
Ural Regional School Programming Contest 2014
479
487
2027
URCAPL, Episode 1
Ural Regional School Programming Contest 2014
460
507
1646
Godzilla Strikes Back!
Autumn School Contest 2008
449
884
1359
Construction
Spring School Contest 2005
431
1156
1357
Teakettle 1.0 for Dummies
Spring School Contest 2005
417
1194
1408
Polynomial Multiplication
Autumn School Contest 2005
414
1207
2026
Dean and Schedule
Ural Regional School Programming Contest 2014
410
567
2029
Towers of Hanoi Strike Back
Ural Regional School Programming Contest 2014
397
585
1928
Another Ecology Problem
Ural Regional School Programming Contest 2012
375
752
1347
Blog
Spring School Contest 2005
359
1382
1328
Fireball
Autumn School Contest 2004
352
1403
2004
Scientists from Spilkovo
Ural Regional School Programming Contest 2013
348
733
2145
Olympiad for Everyone
Ural School Programming Contest 2019
344
346
2071
Juice Cocktails
Ural Regional School Programming Contest 2015
336
619
2113
Survive the flood
University academic school olympiad in informatics 2019
334
390
1730
ManBearPig
Ural Regional School Programming Contest 2009
327
1114
1875
Angry Birds
Ural Regional School Programming Contest 2011
323
952
1299
Psylonians
Spring School Contest 2004
319
1534
1337
Bureaucracy
Autumn School Contest 2004
316
1558
2009
Canteen Line
Ural Regional School Programming Contest 2013
313
812
1499
Kerchiefs
Autumn School Contest 2006
310
1483
2032
Conspiracy Theory and Rebranding
Ural Regional School Programming Contest 2014
306
754
2028
URCAPL, Episode 2
Ural Regional School Programming Contest 2014
281
818
1257
Hyphenation
Autumn School Contest 2003
278
1744
1926
The Tournament of Intelligences
Ural Regional School Programming Contest 2012
278
1005
1722
Observation Deck
Ural Regional School Programming Contest 2009
275
1317
1927
Herbs and Magic
Ural Regional School Programming Contest 2012
266
1049
1883
Ent's Birthday
Ural Regional School Programming Contest 2011
258
1183
1790
Searching for the Truth
Ural Regional School Programming Contest 2010
246
1351
2117
Polyphemus' triples
University academic school olympiad in informatics 2019
246
524
2008
Swifty
Ural Regional School Programming Contest 2013
244
1033
2148
Insane Shot
Ural School Programming Contest 2019
244
482
1791
Uncle Styopa and Buses
Ural Regional School Programming Contest 2010
233
1423
1921
Chaos and Order
Ural Regional School Programming Contest 2012
228
1216
1492
Vasya's Dad 2
Autumn School Contest 2006
227
2002
2064
Caterpillars
Ural Regional School Programming Contest 2015
220
931
1879
GOV-internship 2
Ural Regional School Programming Contest 2011
214
1415
2146
Quiz Show
Ural School Programming Contest 2019
187
621
2143
Victoria!
Ural School Programming Contest 2019
182
638
2112
Battle log
University academic school olympiad in informatics 2019
167
758
2156
Interesting Conversations
Ural School Programming Contest 2020
154
582
2116
He is not a knight for you
University academic school olympiad in informatics 2019
148
849
2114
My craft
University academic school olympiad in informatics 2019
134
931
2007
Mutants versus Machines
Ural Regional School Programming Contest 2013
128
1901
1882
Old Nokia
Ural Regional School Programming Contest 2011
107
2710
2140
BitMazeCraft
Ural School Programming Contest 2019
102
1093
2151
Mahjong
Ural School Programming Contest 2020
101
861
2155
Quadrocopter
Ural School Programming Contest 2020
94
918
2153
Perfect Squad
Ural School Programming Contest 2020
92
937
2150
4B and Zoo
Ural School Programming Contest 2020
84
1016
2152
Tax Fees
Ural School Programming Contest 2020
84
1016
2167
Cipher Message 5
Ural School Programming Contest 2022
78
510
2157
Skydiving
Ural School Programming Contest 2020
69
1209
2006
Kirill the Gardener
Ural Regional School Programming Contest 2013
57
3916
2147
City Building
Ural School Programming Contest 2019
56
1855
2172
Meta-statement 2
Ural School Programming Contest 2022
51
736
2161
Mount & Blade
Ural School Programming Contest 2021
46
802
2173
Meta-statement 3
Ural School Programming Contest 2022
46
801
2154
Flight on a Cannonball
Ural School Programming Contest 2020
32
2274
2160
Meta-statement
Ural School Programming Contest 2021
30
1123
2162
Graphmania
Ural School Programming Contest 2021
28
1179
2171
Two Progressions 2
Ural School Programming Contest 2022
22
1400
2159
Essay
Ural School Programming Contest 2021
21
1448
2163
Interview
Ural School Programming Contest 2021
21
1445
2139
Experiment with Juice
Ural School Programming Contest 2019
20
4081
2158
Two progressions
Ural School Programming Contest 2021
19
1543
2164
Bookmaker
Ural School Programming Contest 2021
18
1603
2170
Experiment with Juice 2
Ural School Programming Contest 2022
17
1660
2166
Two Roads
Ural School Programming Contest 2022
16
1724
2165
Cake Cutter
Ural School Programming Contest 2021
15
1794
2169
City Building 2
Ural School Programming Contest 2022
11
2134
2168
Runes in the Field
Ural School Programming Contest 2022
5
2988
Solved problems:
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