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Problem set. Volume 1
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Volume 2
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ID
Title
Source
Authors
Difficulty
1000
A+B Problem
106908
16
1001
Reverse Root
34088
14
1002
Phone Numbers
Central European Olympiad in Informatics 1999
6967
226
1003
Parity
Central European Olympiad in Informatics 1999
4074
386
1004
Sightseeing Trip
Central European Olympiad in Informatics 1999
2706
580
1005
Stone Pile
USU Championship 1997
20090
78
1006
Square Frames
USU Championship 1997
1584
987
1007
Code Words
USU Championship 1997
3884
404
1008
Image Encoding
USTU PhysTech Cup 2000
4277
367
1009
K-based Numbers
USU Championship 1997
16642
94
1010
Discrete Function
USTU PhysTech Cup 2000
5358
293
1011
Conductors
USU Championship 1997
6352
247
1012
K-based Numbers. Version 2
8722
180
1013
K-based Numbers. Version 3
1343
196
1014
Product of Digits
USU Local Contest. 1999
16729
94
1015
Test the Difference!
USU Local Contest. 1999
3436
455
1016
Cube on the Walk
USU Local Contest. 1999
1894
823
1017
Staircases
USU Local Contest. 1999
9953
157
1018
Binary Apple Tree
USU Local Contest. 1999
5587
280
1019
Line Painting
USU Local Contest. 1999
3371
464
1020
Rope
Autumn School Contest 2000
15722
100
1021
Sacrament of the Sum
Autumn School Contest 2000
10570
148
1022
Genealogical Tree
Autumn School Contest 2000
11042
142
1023
Buttons
Autumn School Contest 2000
7218
217
1024
Permutations
Autumn School Contest 2000
4875
321
1025
Democracy in Danger
Autumn School Contest 2000
23385
67
1026
Questions and Answers
Autumn School Contest 2000
10045
156
1027
D++ Again
Autumn School Contest 2000
2449
637
1028
Stars
Ural Championship 1999
5902
264
1029
Ministry
Ural Championship 1999
3825
354
1030
Titanic
Ural Championship 1999
1729
898
1031
Railway Tickets
Ural Championship 1999
3994
390
1032
Find a Multiple
Ural Championship 1999
4510
301
1033
Labyrinth
Ural Championship 1999
6588
237
1034
Queens in Peaceful Positions
Ural Championship 1999
1911
813
1035
Cross-stitch
Ural Championship 1999
1127
1370
1036
Lucky Tickets
5119
304
1037
Memory Management
USU Championship 2000
1306
1175
1038
Spell Checker
USU Championship 2000
3164
487
1039
Anniversary Party
USU Championship 2000
4000
386
1040
Airline Company
USU Championship 2000
1535
1001
1041
Nikifor
USU Championship 2000
317
4730
1042
Central Heating
USU Championship 2000
1898
811
1043
Cover an Arc
USU Championship 2000
933
1640
1044
Lucky Tickets. Easy!
USU Championship 2000
12643
122
1045
Funny Game
USU Local Contest. March 2000
2915
523
1046
Geometrical Dreams
USU Local Contest. March 2000
798
1891
1047
Simple Calculations
USU Local Contest. March 2000
5035
303
1048
Superlong Sums
USU Local Contest. March 2000
7614
200
1049
Brave Balloonists
USU Local Contest. March 2000
6124
249
1050
Preparing an Article
USU Local Contest. March 2000
1050
1441
1051
Simple Game on a Grid
USU Local Contest. March 2000
2853
534
1052
Rabbit Hunt
USU Local Contest. March 2000
6417
238
1053
Pinocchio
NEERC 2000 Central Subregional
4439
343
1054
Tower of Hanoi
NEERC 2000 Central Subregional
2362
643
1055
Combinations
NEERC 2000 Central Subregional
3604
422
1056
Centers of the Net
NEERC 2000 Central Subregional
2754
552
1057
Amount of Degrees
NEERC 2000 Central Subregional
2116
717
1058
Chocolate
NEERC 2000 Central Subregional
534
2796
1059
Expression
NEERC 2000 Central Subregional
2244
677
1060
Flip Game
NEERC 2000
3845
375
1061
Buffer Manager
NEERC 2000
2158
666
1062
Triathlon
NEERC 2000
778
1831
1063
Domino Puzzle
NEERC 2000
644
2205
1064
Binary Search
NEERC 2000
2191
656
1065
Frontier
NEERC 2000
1013
1411
1066
Garland
NEERC 2000
2478
580
1067
Disk Tree
NEERC 2000
3958
363
1068
Sum
39467
37
1069
Prufer Code
USU Personal Contest 2001
2703
517
1070
Local Time
USU Personal Contest 2001
2112
661
1071
Nikifor 2
USU Personal Contest 2001
2232
626
1072
Routing
USU Personal Contest 2001
2786
502
1073
Square Country
USU Personal Contest 2001
9999
140
1074
Very Short Problem
USU Personal Contest 2001
654
2113
1075
Thread in a Space
USU Personal Contest 2001
692
1998
1076
Trash
1950
712
1077
Travelling Tours
1268
395
1078
Segments
Winter Mathematical Festival Varna 2001
3908
354
1079
Maximum
Winter Mathematical Festival Varna 2001
12481
111
1080
Map Coloring
Winter Mathematical Festival Varna 2001
7289
190
1081
Binary Lexicographic Sequence
Winter Mathematical Festival Varna 2001
5145
269
1082
Gaby Ivanushka
Spring School Contest 2001
10906
126
1083
Factorials!!!
Spring School Contest 2001
20234
68
1084
Goat in the Garden
Spring School Contest 2001
9163
150
1085
Meeting
Spring School Contest 2001
2190
625
1086
Cryptography
Spring School Contest 2001
12933
106
1087
The Time to Take Stones
Spring School Contest 2001
4964
277
1088
Ilya Murometz
Spring School Contest 2001
1825
750
1089
Verification with the Dictionary
Spring School Contest 2001
1627
840
1090
In the Army Now
USU Local Contest. March 2001
3567
365
1091
Tmutarakan Exams
USU Local Contest. March 2001
2473
526
1092
Transversal
USU Local Contest. March 2001
554
2317
1093
Darts
USU Local Contest. March 2001
641
2008
1094
E-screen
USU Local Contest. March 2001
2818
462
1095
Nikifor 3
USU Local Contest. March 2001
2245
580
1096
Get the Right Route Plate!
USU Local Contest. March 2001
1830
710
1097
Square Country 2
USU Local Contest. March 2001
948
1364
1098
Questions
2240
555
1099
Work Scheduling
1020
1148
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