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Problem set. Volume 2
Solved problems:
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ID
Title
Source
Authors
Difficulty
1197
Lonesome Knight
Spring School Contest 2002
15304
29
1100
Final Standings
Tetrahedron Team Online Contest May 2001
9337
47
1110
Power
Bulgarian Online Contest September 2001
8293
53
1196
History Exam
Spring School Contest 2002
7692
58
1149
Sinus Dances
7104
62
1119
Metro
Autumn School Contest 2001
5901
74
1131
Copying
USU Championship 2001
5796
76
1139
City Blocks
NEERC 2001 Central Subregional
5673
78
1106
Two Teams
Tetrahedron Team Online Contest May 2001
5664
77
1194
Handshakes
Spring School Contest 2002
5488
81
1146
Maximum Sum
DSAP Vietnam Online Contest November 2001
5371
82
1180
Stone Game
USU Personal Contest 2002
5142
86
1120
Sum of Sequential Numbers
Autumn School Contest 2001
5070
87
1161
Stripies
NEERC 2001 Northern Subregional
4821
91
1104
Don’t Ask Woman about Her Age
Tetrahedron Team Online Contest May 2001
4672
93
1136
Parliament
NEERC 2001 Central Subregional
4433
99
1118
Nontrivial Numbers
Autumn School Contest 2001
4264
103
1126
Magnetic Storms
USU Championship 2001
4238
104
1192
Ball in a Dream
Spring School Contest 2002
4035
110
1123
Salary
Autumn School Contest 2001
3627
121
1167
Bicolored Horses
Romanian Online Contest December 2001
3180
138
1178
Akbardin’s Roads
USU Personal Contest 2002
3048
145
1142
Relations
DSAP Vietnam Online Contest November 2001
2975
148
1135
Recruits
NEERC 2001 Central Subregional
2685
163
1157
Young Tiler
Ural Championship 2001. Round 2
2649
166
1152
False Mirrors
Ural Championship 2001. Round 2
2605
169
1102
Strange Dialog
Tetrahedron Team Online Contest May 2001
2487
175
1193
Queue at the Exam
Spring School Contest 2002
2476
178
1134
Cards
NEERC 2001 Central Subregional
2427
181
1133
Fibonacci Sequence
NEERC 2001 Central Subregional
2399
183
1114
Boxes
Bulgarian Online Contest September 2001
2342
187
1138
Integer Percentage
NEERC 2001 Central Subregional
2211
198
1112
Cover
Bulgarian Online Contest September 2001
2206
198
1164
Fillword
NEERC 2001 Northern Subregional
2201
200
1183
Brackets Sequence
NEERC 2001
2134
207
1125
Hopscotch
USU Championship 2001
1944
225
1122
Game
Autumn School Contest 2001
1838
238
1150
Page Numbers
Ural Championship 2001. Round 2
1817
242
1191
Catch the thief!
Spring School Contest 2002
1816
243
1108
Heritage
Bulgarian Online Contest September 2001
1779
246
1109
Conference
Bulgarian Online Contest September 2001
1772
247
1195
Ouths and Crosses
Spring School Contest 2002
1725
255
1113
Jeep
Bulgarian Online Contest September 2001
1697
258
1117
Hierarchy
Autumn School Contest 2001
1610
272
1179
Numbers in Text
USU Personal Contest 2002
1571
280
1184
Cable Master
NEERC 2001
1510
291
1160
Network
NEERC 2001 Northern Subregional
1502
297
1137
Bus Routes
NEERC 2001 Central Subregional
1477
296
1153
Supercomputer
Ural Championship 2001. Round 2
1465
299
1190
Bar of Chocolate
Spring School Contest 2002
1441
305
1124
Mosaic
USU Championship 2001
1423
307
1185
Wall
NEERC 2001
1412
312
1127
Colored Bricks
USU Championship 2001
1396
313
1116
Piecewise Constant Function
Autumn School Contest 2001
1371
319
1156
Two Rounds
Ural Championship 2001. Round 2
1307
335
1121
Branches
Autumn School Contest 2001
1295
337
1176
Hyperchannels
USU Personal Contest 2002
1209
363
1141
RSA Attack
1189
368
1140
Swamp Incident
NEERC 2001 Central Subregional
1188
368
1145
Rope in the Labyrinth
DSAP Vietnam Online Contest November 2001
1117
391
1111
Squares
Bulgarian Online Contest September 2001
1099
397
1115
Ships
Bulgarian Online Contest September 2001
1070
407
1107
Warehouse Problem
Tetrahedron Team Online Contest May 2001
1040
417
1128
Partition into Groups
USU Championship 2001
1033
422
1155
Troubleduons
Ural Championship 2001. Round 2
1011
432
1181
Cutting a Painted Polygon
USU Personal Contest 2002
997
440
1162
Currency Exchange
NEERC 2001 Northern Subregional
985
444
1129
Door Painting
USU Championship 2001
959
454
1189
Pairs of Integers
NEERC 2001
884
496
1158
Censored!
NEERC 2001 Northern Subregional
865
504
1198
Jobbery
856
536
1103
Pencils and Circles
Tetrahedron Team Online Contest May 2001
855
506
1182
Team Them Up!
NEERC 2001
854
513
1172
Ship Routes
Romanian Online Contest December 2001
778
560
1101
Robot in the Field
Tetrahedron Team Online Contest May 2001
777
556
1143
Electric Path
DSAP Vietnam Online Contest November 2001
760
573
1132
Square Root
716
607
1186
Chemical Reactions
NEERC 2001
641
680
1174
Weird Permutations
Romanian Online Contest December 2001
636
683
1168
Radio Stations
Romanian Online Contest December 2001
607
716
1159
Fence
NEERC 2001 Northern Subregional
597
727
1169
Pairs
Romanian Online Contest December 2001
597
727
1147
Shaping Regions
DSAP Vietnam Online Contest November 2001
537
806
1105
Observers Coloring
Tetrahedron Team Online Contest May 2001
518
828
1165
Subnumber
NEERC 2001 Northern Subregional
492
879
1154
Mages Contest
Ural Championship 2001. Round 2
491
881
1175
Strange Sequence
USU Personal Contest 2002
456
950
1130
Nikifor's Walk
USU Championship 2001
438
983
1151
Radiobeacons
Ural Championship 2001. Round 2
413
1043
1173
Lazy Snail
Romanian Online Contest December 2001
411
1049
1171
Lost in Space
Romanian Online Contest December 2001
328
1306
1177
Like Comparisons
USU Personal Contest 2002
325
1322
1170
Desert
Romanian Online Contest December 2001
284
1502
1148
Building Towers
DSAP Vietnam Online Contest November 2001
241
1757
1144
The Emperor's Riddle
DSAP Vietnam Online Contest November 2001
231
1830
1163
Chapaev
NEERC 2001 Northern Subregional
215
1961
1187
Statistical Trouble
NEERC 2001
208
2032
1188
Library
NEERC 2001
196
2151
1166
Funny Card Game
NEERC 2001 Northern Subregional
118
3549
1199
Mouse
103
3676
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