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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
17737
28
1100
Final Standings
Tetrahedron Team Online Contest May 2001
11094
44
1110
Power
Bulgarian Online Contest September 2001
9367
52
1196
History Exam
Spring School Contest 2002
9205
53
1149
Sinus Dances
8174
60
1119
Metro
Autumn School Contest 2001
6926
71
1106
Two Teams
Tetrahedron Team Online Contest May 2001
6543
74
1131
Copying
USU Championship 2001
6465
76
1139
City Blocks
NEERC 2001 Central Subregional
6346
77
1146
Maximum Sum
DSAP Vietnam Online Contest November 2001
6191
79
1194
Handshakes
Spring School Contest 2002
6003
82
1120
Sum of Sequential Numbers
Autumn School Contest 2001
5609
87
1180
Stone Game
USU Personal Contest 2002
5611
87
1126
Magnetic Storms
USU Championship 2001
5347
91
1161
Stripies
NEERC 2001 Northern Subregional
5381
91
1104
Don’t Ask Woman about Her Age
Tetrahedron Team Online Contest May 2001
5174
94
1136
Parliament
NEERC 2001 Central Subregional
4939
99
1118
Nontrivial Numbers
Autumn School Contest 2001
4736
103
1192
Ball in a Dream
Spring School Contest 2002
4539
108
1123
Salary
Autumn School Contest 2001
4043
121
1167
Bicolored Horses
Romanian Online Contest December 2001
3611
135
1178
Akbardin’s Roads
USU Personal Contest 2002
3313
148
1142
Relations
DSAP Vietnam Online Contest November 2001
3210
152
1160
Network
NEERC 2001 Northern Subregional
3217
154
1152
False Mirrors
Ural Championship 2001. Round 2
3149
155
1135
Recruits
NEERC 2001 Central Subregional
3033
161
1112
Cover
Bulgarian Online Contest September 2001
2988
163
1102
Strange Dialog
Tetrahedron Team Online Contest May 2001
2895
168
1193
Queue at the Exam
Spring School Contest 2002
2716
180
1155
Troubleduons
Ural Championship 2001. Round 2
2701
181
1114
Boxes
Bulgarian Online Contest September 2001
2559
190
1134
Cards
NEERC 2001 Central Subregional
2513
194
1183
Brackets Sequence
NEERC 2001
2494
196
1157
Young Tiler
Ural Championship 2001. Round 2
2465
198
1138
Integer Percentage
NEERC 2001 Central Subregional
2433
200
1164
Fillword
NEERC 2001 Northern Subregional
2404
203
1162
Currency Exchange
NEERC 2001 Northern Subregional
2239
218
1133
Fibonacci Sequence
NEERC 2001 Central Subregional
2196
222
1125
Hopscotch
USU Championship 2001
2091
233
1184
Cable Master
NEERC 2001
2022
242
1191
Catch the thief!
Spring School Contest 2002
1997
245
1122
Game
Autumn School Contest 2001
1975
246
1150
Page Numbers
Ural Championship 2001. Round 2
1978
247
1108
Heritage
Bulgarian Online Contest September 2001
1957
249
1109
Conference
Bulgarian Online Contest September 2001
1956
249
1195
Ouths and Crosses
Spring School Contest 2002
1886
259
1113
Jeep
Bulgarian Online Contest September 2001
1866
261
1117
Hierarchy
Autumn School Contest 2001
1764
276
1179
Numbers in Text
USU Personal Contest 2002
1682
291
1124
Mosaic
USU Championship 2001
1636
297
1153
Supercomputer
Ural Championship 2001. Round 2
1640
297
1185
Wall
NEERC 2001
1628
300
1190
Bar of Chocolate
Spring School Contest 2002
1590
307
1127
Colored Bricks
USU Championship 2001
1527
318
1137
Bus Routes
NEERC 2001 Central Subregional
1494
326
1156
Two Rounds
Ural Championship 2001. Round 2
1492
326
1116
Piecewise Constant Function
Autumn School Contest 2001
1482
328
1176
Hyperchannels
USU Personal Contest 2002
1446
338
1121
Branches
Autumn School Contest 2001
1404
346
1145
Rope in the Labyrinth
DSAP Vietnam Online Contest November 2001
1350
360
1141
RSA Attack
1335
364
1140
Swamp Incident
NEERC 2001 Central Subregional
1296
375
1111
Squares
Bulgarian Online Contest September 2001
1250
388
1128
Partition into Groups
USU Championship 2001
1187
409
1115
Ships
Bulgarian Online Contest September 2001
1169
415
1107
Warehouse Problem
Tetrahedron Team Online Contest May 2001
1151
419
1129
Door Painting
USU Championship 2001
1135
427
1181
Cutting a Painted Polygon
USU Personal Contest 2002
1084
449
1198
Jobbery
1038
488
1103
Pencils and Circles
Tetrahedron Team Online Contest May 2001
965
499
1189
Pairs of Integers
NEERC 2001
974
500
1158
Censored!
NEERC 2001 Northern Subregional
964
503
1182
Team Them Up!
NEERC 2001
943
516
1101
Robot in the Field
Tetrahedron Team Online Contest May 2001
882
546
1172
Ship Routes
Romanian Online Contest December 2001
875
554
1132
Square Root
866
559
1143
Electric Path
DSAP Vietnam Online Contest November 2001
837
578
1186
Chemical Reactions
NEERC 2001
696
696
1174
Weird Permutations
Romanian Online Contest December 2001
678
713
1169
Pairs
Romanian Online Contest December 2001
669
722
1168
Radio Stations
Romanian Online Contest December 2001
662
730
1159
Fence
NEERC 2001 Northern Subregional
645
749
1147
Shaping Regions
DSAP Vietnam Online Contest November 2001
641
753
1105
Observers Coloring
Tetrahedron Team Online Contest May 2001
584
819
1154
Mages Contest
Ural Championship 2001. Round 2
547
880
1165
Subnumber
NEERC 2001 Northern Subregional
524
918
1130
Nikifor's Walk
USU Championship 2001
514
934
1175
Strange Sequence
USU Personal Contest 2002
506
953
1151
Radiobeacons
Ural Championship 2001. Round 2
454
1057
1173
Lazy Snail
Romanian Online Contest December 2001
448
1071
1177
Like Comparisons
USU Personal Contest 2002
386
1241
1171
Lost in Space
Romanian Online Contest December 2001
373
1280
1170
Desert
Romanian Online Contest December 2001
321
1482
1148
Building Towers
DSAP Vietnam Online Contest November 2001
273
1731
1144
The Emperor's Riddle
DSAP Vietnam Online Contest November 2001
246
1914
1187
Statistical Trouble
NEERC 2001
230
2050
1188
Library
NEERC 2001
218
2157
1199
Mouse
126
3431
1166
Funny Card Game
NEERC 2001 Northern Subregional
132
3536
1163
Chapaev
NEERC 2001 Northern Subregional
103
4339
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