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Problem set. Volume 3
Solved problems:
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ID
Title
Source
Authors
Difficulty
1293
Eniya
Spring School Contest 2004
34534
15
1264
Workdays
Autumn School Contest 2003
23714
21
1209
1, 10, 100, 1000...
Autumn School Contest 2002
14455
34
1225
Flags
NEERC 2002 Central Subregional
13981
35
1263
Elections
Autumn School Contest 2003
11770
43
1243
Divorce of the Seven Dwarfs
USU Personal Contest 2003
10133
49
1296
Hyperjump
Spring School Contest 2004
7757
65
1224
Spiral
NEERC 2002 Central Subregional
7505
66
1290
Sabotage
Spring School Contest 2004
6357
79
1203
Scientific Conference
USU Local Contest. March 2002
6006
82
1297
Palindrome
Spring School Contest 2004
6181
82
1214
Strange Procedure
Autumn School Contest 2002
4891
101
1228
Array
NEERC 2002 Central Subregional
4633
107
1260
Nudnik Photographer
Autumn School Contest 2003
4541
110
1226
esreveR redrO
NEERC 2002 Central Subregional
4393
113
1283
Dwarf
USU Personal Contest 2004
4278
118
1219
Symbolic Sequence
USU Championship 2002
4174
119
1206
Sum of Digits of the Sum of Numbers
USU Local Contest. March 2002
4008
123
1207
Median on the Plane
USU Local Contest. March 2002
3925
125
1222
Chernobyl’ Eagles
USU Championship 2002
3500
141
1280
Topological Sorting
NEERC 2003 Central Subregional
3537
142
1272
Non-Yekaterinburg Subway
USU Championship 2003
3387
148
1295
Crazy Notions
Spring School Contest 2004
3343
151
1210
Kind Spirits
Autumn School Contest 2002
3047
162
1213
Cockroaches!
Autumn School Contest 2002
2933
169
1242
Werewolf
USU Personal Contest 2003
2788
178
1208
Legendary Teams Contest
USU Local Contest. March 2002
2314
212
1249
Ancient Necropolis
USU Local Contest. March 2003
2296
216
1204
Idempotents
USU Local Contest. March 2002
2150
228
1298
Knight
Spring School Contest 2004
2168
232
1205
By the Underground or by Foot?
USU Local Contest. March 2002
2070
237
1247
Check a Sequence
USU Personal Contest 2003
2078
239
1200
Horns and Hoofs
USU Local Contest. March 2002
1925
254
1244
Gentlemen
USU Personal Contest 2003
1947
255
1220
Stacks
USU Championship 2002
1792
275
1255
Graveyard of the Cosa Nostra
USU Local Contest. March 2003
1791
277
1223
Chernobyl’ Eagle on a Roof
USU Championship 2002
1673
295
1215
Exactness of Projectile Hit
Autumn School Contest 2002
1652
298
1227
Rally Championship
NEERC 2002 Central Subregional
1649
299
1211
Collective Guarantee
Autumn School Contest 2002
1597
309
1294
Mars Satellites
Spring School Contest 2004
1608
312
1218
Episode N-th: The Jedi Tournament
USU Championship 2002
1537
321
1246
Tethered Dog
USU Personal Contest 2003
1496
331
1261
Tips
Autumn School Contest 2003
1508
331
1282
Game Tree
NEERC 2003 Central Subregional
1486
336
1201
Which Day Is It?
USU Local Contest. March 2002
1360
359
1292
Mars Space Stations
Spring School Contest 2004
1330
377
1287
Mars Canals
USU Personal Contest 2004
1323
378
1229
Strong Brickwork
NEERC 2002 Central Subregional
1299
379
1291
Gear-wheels
Spring School Contest 2004
1304
384
1262
Pseudo-Roman Number
Autumn School Contest 2003
1286
388
1259
How to Become Star?
Autumn School Contest 2003
1268
393
1289
One Way Ticket
USU Personal Contest 2004
1262
397
1252
Sorting the Tombstones
USU Local Contest. March 2003
1239
399
1217
Unlucky Tickets
USU Championship 2002
1204
409
1258
Pool
Autumn School Contest 2003
1196
416
1238
Folding
NEERC 2002
1178
419
1221
Malevich Strikes Back!
USU Championship 2002
1168
421
1279
Warehouse
NEERC 2003 Central Subregional
1184
421
1202
Rectangles Travel
USU Local Contest. March 2002
1107
441
1273
Tie
USU Championship 2003
1077
462
1212
Battleship
Autumn School Contest 2002
1008
487
1236
Decoding Task
NEERC 2002
1001
492
1254
Die Hard
USU Local Contest. March 2003
770
639
1286
Starship Travel
USU Personal Contest 2004
755
659
1248
Sequence Sum
USU Personal Contest 2003
741
664
1234
Bricks
NEERC 2002
723
678
1274
Fractional Arithmetic
NEERC 2003 Central Subregional
717
691
1253
Necrologues
USU Local Contest. March 2003
703
699
1250
Sea Burial
USU Local Contest. March 2003
677
726
1276
Train
NEERC 2003 Central Subregional
676
733
1268
Little Chu
USU Championship 2003
672
737
1230
Introspective Program
NEERC 2002 Central Subregional
647
755
1235
Cricket Field
NEERC 2002
643
761
1277
Cops and Thieves
NEERC 2003 Central Subregional
625
792
1269
Obscene Words Filter
USU Championship 2003
580
852
1233
Amusing Numbers
NEERC 2002
518
941
1245
Pictures
USU Personal Contest 2003
511
957
1237
Evacuation Plan
NEERC 2002
499
977
1278
“… Connecting People”
NEERC 2003 Central Subregional
501
984
1281
River Basin
NEERC 2003 Central Subregional
348
1404
1240
Heroes of Might and Magic
NEERC 2002
340
1420
1266
Kirchhoff's Law
USU Championship 2003
334
1461
1251
Cemetery Manager
USU Local Contest. March 2003
322
1502
1299
Psylonians
Spring School Contest 2004
319
1534
1265
Mirror
USU Championship 2003
316
1541
1285
Thread in a Hyperspace
USU Personal Contest 2004
299
1633
1241
Inlay Cutters
NEERC 2002
283
1698
1267
Yekaterinburg Subway
USU Championship 2003
279
1739
1257
Hyphenation
Autumn School Contest 2003
278
1744
1216
Two Pawns and One King
USU Championship 2002
230
2068
1231
Turing: One, Two, Three, …
NEERC 2002 Central Subregional
221
2149
1256
Cemetery Guard
USU Local Contest. March 2003
209
2277
1288
Astrolocation
USU Personal Contest 2004
205
2346
1232
Asteroid Landing
NEERC 2002 Central Subregional
201
2352
1284
Space Poker
USU Personal Contest 2004
203
2368
1270
Unicube
USU Championship 2003
201
2381
1275
Knights of the Round Table
NEERC 2003 Central Subregional
199
2405
1239
Ghost Busters
NEERC 2002
151
3087
1271
Sailing Directions
USU Championship 2003
97
4696
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