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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
35421
15
1409
Two Gangsters
Autumn School Contest 2005
33980
15
1264
Workdays
Autumn School Contest 2003
24341
21
1025
Democracy in Danger
Autumn School Contest 2000
23179
67
1785
Lost in Localization
Ural Regional School Programming Contest 2010
22223
16
1083
Factorials!!!
Spring School Contest 2001
20116
68
1197
Lonesome Knight
Spring School Contest 2002
18064
28
1877
Bicycle Codes
Ural Regional School Programming Contest 2011
17400
19
1020
Rope
Autumn School Contest 2000
15590
99
1209
1, 10, 100, 1000...
Autumn School Contest 2002
14758
34
1787
Turn for MEGA
Ural Regional School Programming Contest 2010
14495
25
1639
Chocolate 2
Autumn School Contest 2008
12974
32
2001
Mathematicians and Berries
Ural Regional School Programming Contest 2013
12885
22
1086
Cryptography
Spring School Contest 2001
12834
106
1263
Elections
Autumn School Contest 2003
12006
43
1581
Teamwork
Autumn School Contest 2007
11161
40
1327
Fuses
Autumn School Contest 2004
11067
47
1880
Psych Up's Eigenvalues
Ural Regional School Programming Contest 2011
10970
30
1022
Genealogical Tree
Autumn School Contest 2000
10965
141
1082
Gaby Ivanushka
Spring School Contest 2001
10873
125
1021
Sacrament of the Sum
Autumn School Contest 2000
10519
147
1349
Farm
Spring School Contest 2005
10267
51
1493
One Step from Happiness
Autumn School Contest 2006
10266
47
1496
Spammer
Autumn School Contest 2006
9918
49
1026
Questions and Answers
Autumn School Contest 2000
9869
157
1196
History Exam
Spring School Contest 2002
9444
53
1084
Goat in the Garden
Spring School Contest 2001
9074
150
2066
Simple Expression
Ural Regional School Programming Contest 2015
8354
28
1296
Hyperjump
Spring School Contest 2004
8153
63
1924
Four Imps
Ural Regional School Programming Contest 2012
7985
38
1023
Buttons
Autumn School Contest 2000
7188
215
1119
Metro
Autumn School Contest 2001
7158
70
1404
Easy to Hack!
Autumn School Contest 2005
6481
80
1290
Sabotage
Spring School Contest 2004
6430
80
1723
Sandro's Book
Ural Regional School Programming Contest 2009
6282
62
1297
Palindrome
Spring School Contest 2004
6272
82
1876
Centipede's Morning
Ural Regional School Programming Contest 2011
6123
54
1194
Handshakes
Spring School Contest 2002
6067
83
1120
Sum of Sequential Numbers
Autumn School Contest 2001
5733
87
1881
Long problem statement
Ural Regional School Programming Contest 2011
5453
61
1330
Intervals
Autumn School Contest 2004
5391
96
1494
Monobilliards
Autumn School Contest 2006
5219
93
1353
Milliard Vasya's Function
Spring School Contest 2005
5035
103
1214
Strange Procedure
Autumn School Contest 2002
4964
102
1087
The Time to Take Stones
Spring School Contest 2001
4944
275
1024
Permutations
Autumn School Contest 2000
4852
319
1118
Nontrivial Numbers
Autumn School Contest 2001
4842
103
1260
Nudnik Photographer
Autumn School Contest 2003
4621
111
1192
Ball in a Dream
Spring School Contest 2002
4603
109
1925
British Scientists Save the World
Ural Regional School Programming Contest 2012
4455
68
1792
Hamming Code
Ural Regional School Programming Contest 2010
4351
82
1642
1D Maze
Autumn School Contest 2008
4342
96
1336
Problem of Ben Betsalel
Autumn School Contest 2004
4239
122
2025
Line Fighting
Ural Regional School Programming Contest 2014
4231
60
1573
Alchemy
Autumn School Contest 2007
4204
107
1644
A Whole Lot of Walnuts
Autumn School Contest 2008
4194
100
1123
Salary
Autumn School Contest 2001
4105
122
1402
Cocktails
Autumn School Contest 2005
4028
129
2002
Test Task
Ural Regional School Programming Contest 2013
3982
70
1352
Mersenne Primes
Spring School Contest 2005
3964
131
1354
Palindrome. Again Palindrome
Spring School Contest 2005
3758
138
1731
Dill
Ural Regional School Programming Contest 2009
3739
104
1295
Crazy Notions
Spring School Contest 2004
3403
151
2035
Another Dress Rehearsal
Ural Regional School Programming Contest 2014
3373
75
1786
Sandro's Biography
Ural Regional School Programming Contest 2010
3327
108
1796
Amusement Park
Ural Regional School Programming Contest 2010
3311
108
1726
Visits
Ural Regional School Programming Contest 2009
3110
125
1401
Gamers
Autumn School Contest 2005
3109
167
1210
Kind Spirits
Autumn School Contest 2002
3103
163
1572
Yekaterinozavodsk Great Well
Autumn School Contest 2007
3079
146
1576
Telephone Tariffs
Autumn School Contest 2007
3062
147
2005
Taxi for Programmers
Ural Regional School Programming Contest 2013
3062
90
2031
Overturned Numbers
Ural Regional School Programming Contest 2014
2994
85
1213
Cockroaches!
Autumn School Contest 2002
2965
170
1348
Goat in the Garden 2
Spring School Contest 2005
2903
179
1335
White Thesis
Autumn School Contest 2004
2843
182
1725
Sold Out!
Ural Regional School Programming Contest 2009
2778
139
2011
Long Statement
Ural Regional School Programming Contest 2013
2763
100
1193
Queue at the Exam
Spring School Contest 2002
2760
181
2033
Devices
Ural Regional School Programming Contest 2014
2515
101
1490
Fire Circle
Autumn School Contest 2006
2460
197
1355
Bald Spot Revisited
Spring School Contest 2005
2456
211
1027
D++ Again
Autumn School Contest 2000
2443
632
1333
Genie Bomber 2
Autumn School Contest 2004
2379
217
1640
Circle of Winter
Autumn School Contest 2008
2378
175
1491
Unreal Story
Autumn School Contest 2006
2325
208
1788
On the Benefits of Umbrellas
Ural Regional School Programming Contest 2010
2254
159
2068
Game of Nuts
Ural Regional School Programming Contest 2015
2202
104
1298
Knight
Spring School Contest 2004
2201
233
1085
Meeting
Spring School Contest 2001
2174
624
2111
Plato
University academic school olympiad in informatics 2019
2165
70
2010
Sasha the Young Grandmaster
Ural Regional School Programming Contest 2013
2129
130
1645
Ski Race
Autumn School Contest 2008
2092
199
1191
Catch the thief!
Spring School Contest 2002
2021
248
1122
Game
Autumn School Contest 2001
2001
249
1727
Znaika's Magic Numbers
Ural Regional School Programming Contest 2009
1946
199
1195
Ouths and Crosses
Spring School Contest 2002
1931
259
1930
Ivan's Car
Ural Regional School Programming Contest 2012
1830
165
1088
Ilya Murometz
Spring School Contest 2001
1817
745
1794
Masterpieces of World Architecture
Ural Regional School Programming Contest 2010
1816
197
1117
Hierarchy
Autumn School Contest 2001
1793
277
2000
Grand Theft Array V
Ural Regional School Programming Contest 2013
1793
154
1356
Something Easier
Spring School Contest 2005
1746
296
1874
Football Goal
Ural Regional School Programming Contest 2011
1700
194
1215
Exactness of Projectile Hit
Autumn School Contest 2002
1675
301
1789
Searching for the Dodecahedron
Ural Regional School Programming Contest 2010
1657
216
1294
Mars Satellites
Spring School Contest 2004
1624
315
1211
Collective Guarantee
Autumn School Contest 2002
1620
311
1089
Verification with the Dictionary
Spring School Contest 2001
1616
837
1190
Bar of Chocolate
Spring School Contest 2002
1611
310
1497
Cutting a Square
Autumn School Contest 2006
1606
301
1878
Rubinchik's Cube
Ural Regional School Programming Contest 2011
1556
212
1261
Tips
Autumn School Contest 2003
1548
329
1116
Piecewise Constant Function
Autumn School Contest 2001
1503
331
1406
Next Number
Autumn School Contest 2005
1501
346
1403
Courier
Autumn School Contest 2005
1480
350
1795
Husband in a Shop
Ural Regional School Programming Contest 2010
1442
248
1495
One-two, One-two 2
Autumn School Contest 2006
1421
339
1121
Branches
Autumn School Contest 2001
1418
350
1292
Mars Space Stations
Spring School Contest 2004
1345
380
1407
One-two, One-two
Autumn School Contest 2005
1344
386
1350
Canteen
Spring School Contest 2005
1331
388
1291
Gear-wheels
Spring School Contest 2004
1329
385
2138
The Good, the Bad and the Ugly
Ural School Programming Contest 2019
1312
107
1262
Pseudo-Roman Number
Autumn School Contest 2003
1304
390
1259
How to Become Star?
Autumn School Contest 2003
1290
394
1574
Mathematicians and brackets
Autumn School Contest 2007
1264
354
1489
Points on a Parallelepiped
Autumn School Contest 2006
1245
387
1258
Pool
Autumn School Contest 2003
1219
417
2142
Magic
Ural School Programming Contest 2019
1146
122
2072
Kirill the Gardener 3
Ural Regional School Programming Contest 2015
1130
202
1329
Galactic History
Autumn School Contest 2004
1117
460
1648
Yachts
Autumn School Contest 2008
1086
382
2069
Hard Rock
Ural Regional School Programming Contest 2015
1062
215
1212
Battleship
Autumn School Contest 2002
1022
491
2070
Interesting Numbers
Ural Regional School Programming Contest 2015
1002
228
2073
Log Files
Ural Regional School Programming Contest 2015
989
231
1351
Good Gnusmas – Dead Gnusmas
Spring School Contest 2005
985
523
1643
Attack of the Dark Fortress
Autumn School Contest 2008
976
424
1922
Superhero Team
Ural Regional School Programming Contest 2012
966
312
2149
Pigeonhole Principle
Ural School Programming Contest 2019
958
146
1334
Checkers
Autumn School Contest 2004
949
541
1358
Cables
Spring School Contest 2005
949
543
1577
E-mail
Autumn School Contest 2007
942
474
1400
Cellular Characters
Autumn School Contest 2005
940
550
1873
GOV Chronicles
Ural Regional School Programming Contest 2011
912
360
1793
Tray 2
Ural Regional School Programming Contest 2010
907
392
1579
Coat Transportation
Autumn School Contest 2007
898
497
2034
Caravans
Ural Regional School Programming Contest 2014
884
284
1332
Genie Bomber
Autumn School Contest 2004
825
621
1641
Duties
Autumn School Contest 2008
823
502
1929
Teddybears are not for Everyone
Ural Regional School Programming Contest 2012
808
372
2062
Ambitious Experiment
Ural Regional School Programming Contest 2015
802
284
2003
Simple Magic
Ural Regional School Programming Contest 2013
773
355
2024
Adventure Time
Ural Regional School Programming Contest 2014
758
331
2065
Different Sums
Ural Regional School Programming Contest 2015
747
305
1728
Curse on Team.GOV
Ural Regional School Programming Contest 2009
733
523
1405
Goat in the Garden 5
Autumn School Contest 2005
720
715
2067
Friends and Berries
Ural Regional School Programming Contest 2015
718
317
2115
The Knowledge Day
University academic school olympiad in informatics 2019
691
217
2144
Cleaning the Room
Ural School Programming Contest 2019
634
219
1729
Dead Man's Chest
Ural Regional School Programming Contest 2009
610
627
1724
Origin of Man Clarified
Ural Regional School Programming Contest 2009
580
659
2141
Sasha Vilkin
Ural School Programming Contest 2019
561
247
1923
Scary Politics
Ural Regional School Programming Contest 2012
552
542
1498
Stroke at Full Speed
Autumn School Contest 2006
538
886
2063
Black and White
Ural Regional School Programming Contest 2015
536
423
1575
Yekaterinburg Subway 2
Autumn School Contest 2007
514
862
1331
Vladislava
Autumn School Contest 2004
509
999
1578
Mammoth Hunt
Autumn School Contest 2007
503
880
2030
Awesome Backup System
Ural Regional School Programming Contest 2014
496
502
1580
Dean's Debts
Autumn School Contest 2007
494
896
1884
Way to the University
Ural Regional School Programming Contest 2011
494
658
1647
Divide an Island!
Autumn School Contest 2008
490
837
2027
URCAPL, Episode 1
Ural Regional School Programming Contest 2014
472
527
1646
Godzilla Strikes Back!
Autumn School Contest 2008
457
896
1359
Construction
Spring School Contest 2005
438
1162
1357
Teakettle 1.0 for Dummies
Spring School Contest 2005
427
1191
2026
Dean and Schedule
Ural Regional School Programming Contest 2014
426
583
1408
Polynomial Multiplication
Autumn School Contest 2005
424
1203
2029
Towers of Hanoi Strike Back
Ural Regional School Programming Contest 2014
414
600
1928
Another Ecology Problem
Ural Regional School Programming Contest 2012
387
767
1347
Blog
Spring School Contest 2005
368
1377
2145
Olympiad for Everyone
Ural School Programming Contest 2019
367
374
2004
Scientists from Spilkovo
Ural Regional School Programming Contest 2013
360
751
1328
Fireball
Autumn School Contest 2004
357
1412
2113
Survive the flood
University academic school olympiad in informatics 2019
356
416
2071
Juice Cocktails
Ural Regional School Programming Contest 2015
354
634
1875
Angry Birds
Ural Regional School Programming Contest 2011
332
969
1730
ManBearPig
Ural Regional School Programming Contest 2009
331
1140
1299
Psylonians
Spring School Contest 2004
323
1547
1337
Bureaucracy
Autumn School Contest 2004
323
1557
2009
Canteen Line
Ural Regional School Programming Contest 2013
323
835
2032
Conspiracy Theory and Rebranding
Ural Regional School Programming Contest 2014
320
770
1499
Kerchiefs
Autumn School Contest 2006
317
1485
1926
The Tournament of Intelligences
Ural Regional School Programming Contest 2012
290
1015
2028
URCAPL, Episode 2
Ural Regional School Programming Contest 2014
288
853
1257
Hyphenation
Autumn School Contest 2003
282
1756
2148
Insane Shot
Ural School Programming Contest 2019
282
483
1722
Observation Deck
Ural Regional School Programming Contest 2009
279
1345
2117
Polyphemus' triples
University academic school olympiad in informatics 2019
277
531
1927
Herbs and Magic
Ural Regional School Programming Contest 2012
272
1080
1883
Ent's Birthday
Ural Regional School Programming Contest 2011
265
1205
1790
Searching for the Truth
Ural Regional School Programming Contest 2010
253
1368
2008
Swifty
Ural Regional School Programming Contest 2013
248
1077
1921
Chaos and Order
Ural Regional School Programming Contest 2012
237
1233
1791
Uncle Styopa and Buses
Ural Regional School Programming Contest 2010
236
1462
2064
Caterpillars
Ural Regional School Programming Contest 2015
232
954
1492
Vasya's Dad 2
Autumn School Contest 2006
231
2015
1879
GOV-internship 2
Ural Regional School Programming Contest 2011
218
1454
2146
Quiz Show
Ural School Programming Contest 2019
206
653
2143
Victoria!
Ural School Programming Contest 2019
203
662
2112
Battle log
University academic school olympiad in informatics 2019
185
782
2116
He is not a knight for you
University academic school olympiad in informatics 2019
169
851
2156
Interesting Conversations
Ural School Programming Contest 2020
169
640
2114
My craft
University academic school olympiad in informatics 2019
146
977
2007
Mutants versus Machines
Ural Regional School Programming Contest 2013
133
1944
2167
Cipher Message 5
Ural School Programming Contest 2022
122
493
2151
Mahjong
Ural School Programming Contest 2020
114
925
2153
Perfect Squad
Ural School Programming Contest 2020
112
940
2140
BitMazeCraft
Ural School Programming Contest 2019
111
1165
1882
Old Nokia
Ural Regional School Programming Contest 2011
110
2762
2155
Quadrocopter
Ural School Programming Contest 2020
103
1015
2152
Tax Fees
Ural School Programming Contest 2020
93
1113
2150
4B and Zoo
Ural School Programming Contest 2020
92
1124
2172
Meta-statement 2
Ural School Programming Contest 2022
81
715
2157
Skydiving
Ural School Programming Contest 2020
79
1288
2161
Mount & Blade
Ural School Programming Contest 2021
76
757
2173
Meta-statement 3
Ural School Programming Contest 2022
69
823
2147
City Building
Ural School Programming Contest 2019
66
1855
2006
Kirill the Gardener
Ural Regional School Programming Contest 2013
59
4028
2162
Graphmania
Ural School Programming Contest 2021
47
1140
2160
Meta-statement
Ural School Programming Contest 2021
44
1205
2163
Interview
Ural School Programming Contest 2021
42
1250
2154
Flight on a Cannonball
Ural School Programming Contest 2020
37
2439
2159
Essay
Ural School Programming Contest 2021
35
1446
2171
Two Progressions 2
Ural School Programming Contest 2022
35
1445
2182
Broken Rum
Ural School Programming Contest 2024
33
856
2183
Good Mood
Ural School Programming Contest 2024
31
898
2158
Two progressions
Ural School Programming Contest 2021
28
1709
2170
Experiment with Juice 2
Ural School Programming Contest 2022
28
1711
2164
Bookmaker
Ural School Programming Contest 2021
27
1759
2174
Dualism of Numbers
Ural School Programming Contest 2023
26
1023
2165
Cake Cutter
Ural School Programming Contest 2021
24
1913
2139
Experiment with Juice
Ural School Programming Contest 2019
22
4405
2169
City Building 2
Ural School Programming Contest 2022
20
2167
2176
Wonderful Numbers
Ural School Programming Contest 2023
20
1228
2166
Two Roads
Ural School Programming Contest 2022
18
2322
2175
Staircase
Ural School Programming Contest 2023
17
1363
2189
I Don't Like These Sailors!
Ural School Programming Contest 2024
16
1416
2184
Flint's Favorite Number
Ural School Programming Contest 2024
13
1600
2168
Runes in the Field
Ural School Programming Contest 2022
10
3250
2180
Need More Tasks
Ural School Programming Contest 2023
10
1840
2181
Student, or There and Back Again
Ural School Programming Contest 2023
10
1835
2178
Vadim and Sudoku: Renban
Ural School Programming Contest 2023
7
2164
2187
Need More Gold
Ural School Programming Contest 2024
7
2164
2177
Vadim and Sudoku: XV-Pairs
Ural School Programming Contest 2023
6
2301
2188
They are charging the cannon... WHY?!
Ural School Programming Contest 2024
6
2301
2179
Need More Roads
Ural School Programming Contest 2023
5
2451
2186
Hands Up!
Ural School Programming Contest 2024
5
2446
2185
Journey to the Treasure
Ural School Programming Contest 2024
4
2621
Solved problems:
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