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Problem set. Volume 4
Solved problems:
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Volume 3
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ID
Title
Source
Authors
Difficulty
1313
Some Words about Sport
Ural Championship 2004. Round 1
15158
34
1319
Hotel
Ural Championship 2004. Round 2
13262
39
1327
Fuses
Autumn School Contest 2004
11067
47
1349
Farm
Spring School Contest 2005
10267
51
1370
Magician
Ural Championship 2005. Round 2
5826
89
1330
Intervals
Autumn School Contest 2004
5390
96
1353
Milliard Vasya's Function
Spring School Contest 2005
5035
103
1336
Problem of Ben Betsalel
Autumn School Contest 2004
4239
122
1352
Mersenne Primes
Spring School Contest 2005
3964
131
1354
Palindrome. Again Palindrome
Spring School Contest 2005
3758
138
1306
Sequence Median
Ural Championship 1998
3532
145
1348
Goat in the Garden 2
Spring School Contest 2005
2903
179
1335
White Thesis
Autumn School Contest 2004
2843
182
1303
Minimal Coverage
Ural Championship 1998
2842
181
1322
Spy
Ural Championship 2004. Round 2
2802
183
1355
Bald Spot Revisited
Spring School Contest 2005
2456
211
1333
Genie Bomber 2
Autumn School Contest 2004
2378
217
1385
Interesting Number
Petrozavodsk Summer 2005. Moscow+Ural Contest
2118
245
1320
Graph Decomposition
Ural Championship 2004. Round 2
1788
287
1377
Lara Croft
Ural Championship 2005. Round 1
1749
297
1356
Something Easier
Spring School Contest 2005
1745
296
1346
Intervals of Monotonicity
USU Championship 2004
1736
298
1302
Delta-wave
Ural Championship 1998
1465
349
1350
Canteen
Spring School Contest 2005
1331
388
1326
Bottle Taps
Ural Championship 2004. Round 2
1303
393
1343
Fairy Tale
USU Championship 2004
1238
417
1316
Electronic Auction
Ural Championship 2004. Round 1
1172
436
1362
Classmates 2
Ural Championship 2005. Round 2
1161
445
1329
Galactic History
Autumn School Contest 2004
1117
460
1371
Cargo Agency
Ural Championship 2005. Round 1
986
524
1351
Good Gnusmas – Dead Gnusmas
Spring School Contest 2005
984
523
1366
Presents
Ural Championship 2005. Round 2
982
525
1375
Bill Clevers
Ural Championship 2005. Round 1
951
543
1325
Dirt
Ural Championship 2004. Round 2
950
537
1334
Checkers
Autumn School Contest 2004
949
540
1358
Cables
Spring School Contest 2005
949
543
1389
Roadworks
Petrozavodsk Summer 2005. Moscow+Ural Contest
927
557
1314
Chase in Subway
Ural Championship 2004. Round 1
867
588
1379
Cups Transportation
Ural Championship 2005. Round 1
845
611
1309
Dispute
Ural Championship 2004. Round 1
843
604
1332
Genie Bomber
Autumn School Contest 2004
824
621
1305
Convex Hull
Ural Championship 1998
718
708
1342
Enterprise
USU Championship 2004
699
733
1301
Cube in Labyrinth
Ural Championship 1998
681
746
1392
Dreaming of Stars
671
767
1323
Classmates
Ural Championship 2004. Round 2
613
828
1373
Pictura ex Machina
Ural Championship 2005. Round 1
608
845
1339
Babies
USU Championship 2004
594
861
1324
Extra Spaces
Ural Championship 2004. Round 2
541
936
1398
Bishop and Pawn
541
868
1364
LaraKiller
Ural Championship 2005. Round 2
534
957
1331
Vladislava
Autumn School Contest 2004
509
999
1317
Hail
Ural Championship 2004. Round 2
471
1072
1310
ACM Diagnostics
Ural Championship 2004. Round 1
463
1090
1341
Device
USU Championship 2004
445
1143
1386
Maze
Petrozavodsk Summer 2005. Moscow+Ural Contest
440
1160
1393
Average Common Prefix
439
1153
1359
Construction
Spring School Contest 2005
438
1161
1357
Teakettle 1.0 for Dummies
Spring School Contest 2005
427
1191
1360
Philosophical Dispute
Ural Championship 2005. Round 2
397
1279
1307
Archiver
Ural Championship 2004. Round 1
392
1283
1321
Floor Indicator
Ural Championship 2004. Round 2
369
1360
1347
Blog
Spring School Contest 2005
368
1376
1387
Vasya's Dad
Petrozavodsk Summer 2005. Moscow+Ural Contest
367
1385
1318
Logarithm
Ural Championship 2004. Round 2
360
1394
1328
Fireball
Autumn School Contest 2004
357
1412
1345
HTML
USU Championship 2004
349
1448
1311
Stable Construction
Ural Championship 2004. Round 1
343
1461
1378
Artificial Intelligence
Ural Championship 2005. Round 1
342
1483
1337
Bureaucracy
Autumn School Contest 2004
323
1556
1382
Game with Cards
Petrozavodsk Summer 2005. Moscow+Ural Contest
289
1746
1338
Automobiles
USU Championship 2004
280
1793
1397
Points Game
272
1729
1315
MDPAR and MIIAR
Ural Championship 2004. Round 1
268
1855
1304
Parallelepiped
Ural Championship 1998
263
1888
1361
Spaceology vs. Chronistics
Ural Championship 2005. Round 2
255
1965
1396
Maximum. Version 2
244
1972
1395
Pascal vs. C++. Version 2
207
2314
1368
Goat in the Garden 3
Ural Championship 2005. Round 2
199
2491
1308
Dean's Pyramid
Ural Championship 2004. Round 1
170
2864
1300
Taxes
Ural Championship 1998
168
2895
1367
Top Secret
Ural Championship 2005. Round 2
163
3010
1312
Tray
Ural Championship 2004. Round 1
161
3015
1381
Cockroaches in the Building
Petrozavodsk Summer 2005. Moscow+Ural Contest
137
3552
1380
Ostap's Chess
Petrozavodsk Summer 2005. Moscow+Ural Contest
114
4210
1344
Gigantic Turnip
USU Championship 2004
106
4482
1365
Testing Calculator
Ural Championship 2005. Round 2
100
4734
1340
Cucaracha
USU Championship 2004
94
5000
1384
Goat in the Garden 4
Petrozavodsk Summer 2005. Moscow+Ural Contest
94
5020
1363
Halftones
Ural Championship 2005. Round 2
92
5105
1391
Snake
Petrozavodsk Summer 2005. Moscow+Ural Contest
85
5496
1372
Death Star
Ural Championship 2005. Round 1
77
6000
1390
Shots at Walls
Petrozavodsk Summer 2005. Moscow+Ural Contest
45
9493
1376
Dean's Pyramid 2
Ural Championship 2005. Round 1
44
9667
1383
Flower-garden Designs
Petrozavodsk Summer 2005. Moscow+Ural Contest
43
9851
1374
Misere
Ural Championship 2005. Round 1
39
10654
1399
Economical Director
36
10389
1369
Cockroach Race
Ural Championship 2005. Round 2
32
12398
1394
Ships. Version 2
23
15822
1388
Photo
Petrozavodsk Summer 2005. Moscow+Ural Contest
22
16315
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