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Problem set. Volume 1
Solved problems:
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Volume 2
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ID
Title
Source
Authors
Difficulty
1000
A+B Problem
106890
16
1001
Reverse Root
34071
14
1002
Phone Numbers
Central European Olympiad in Informatics 1999
6964
226
1003
Parity
Central European Olympiad in Informatics 1999
4071
386
1004
Sightseeing Trip
Central European Olympiad in Informatics 1999
2704
580
1005
Stone Pile
USU Championship 1997
20084
78
1006
Square Frames
USU Championship 1997
1584
987
1007
Code Words
USU Championship 1997
3882
404
1008
Image Encoding
USTU PhysTech Cup 2000
4277
367
1009
K-based Numbers
USU Championship 1997
16637
94
1010
Discrete Function
USTU PhysTech Cup 2000
5358
293
1011
Conductors
USU Championship 1997
6349
247
1012
K-based Numbers. Version 2
8718
180
1013
K-based Numbers. Version 3
1343
196
1014
Product of Digits
USU Local Contest. 1999
16719
94
1015
Test the Difference!
USU Local Contest. 1999
3433
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
5583
280
1019
Line Painting
USU Local Contest. 1999
3368
464
1020
Rope
Autumn School Contest 2000
15721
100
1021
Sacrament of the Sum
Autumn School Contest 2000
10566
148
1022
Genealogical Tree
Autumn School Contest 2000
11038
142
1023
Buttons
Autumn School Contest 2000
7218
217
1024
Permutations
Autumn School Contest 2000
4874
321
1025
Democracy in Danger
Autumn School Contest 2000
23382
67
1026
Questions and Answers
Autumn School Contest 2000
10041
156
1027
D++ Again
Autumn School Contest 2000
2448
637
1028
Stars
Ural Championship 1999
5901
264
1029
Ministry
Ural Championship 1999
3822
354
1030
Titanic
Ural Championship 1999
1728
898
1031
Railway Tickets
Ural Championship 1999
3994
390
1032
Find a Multiple
Ural Championship 1999
4507
301
1033
Labyrinth
Ural Championship 1999
6587
237
1034
Queens in Peaceful Positions
Ural Championship 1999
1907
814
1035
Cross-stitch
Ural Championship 1999
1127
1370
1036
Lucky Tickets
5116
304
1037
Memory Management
USU Championship 2000
1304
1177
1038
Spell Checker
USU Championship 2000
3162
488
1039
Anniversary Party
USU Championship 2000
3998
386
1040
Airline Company
USU Championship 2000
1535
1001
1041
Nikifor
USU Championship 2000
316
4744
1042
Central Heating
USU Championship 2000
1897
811
1043
Cover an Arc
USU Championship 2000
932
1642
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
1890
1047
Simple Calculations
USU Local Contest. March 2000
5034
303
1048
Superlong Sums
USU Local Contest. March 2000
7611
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
6414
238
1053
Pinocchio
NEERC 2000 Central Subregional
4438
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
2752
552
1057
Amount of Degrees
NEERC 2000 Central Subregional
2115
717
1058
Chocolate
NEERC 2000 Central Subregional
533
2801
1059
Expression
NEERC 2000 Central Subregional
2237
679
1060
Flip Game
NEERC 2000
3845
374
1061
Buffer Manager
NEERC 2000
2157
666
1062
Triathlon
NEERC 2000
776
1835
1063
Domino Puzzle
NEERC 2000
643
2208
1064
Binary Search
NEERC 2000
2189
656
1065
Frontier
NEERC 2000
1013
1411
1066
Garland
NEERC 2000
2478
580
1067
Disk Tree
NEERC 2000
3956
364
1068
Sum
39457
37
1069
Prufer Code
USU Personal Contest 2001
2701
517
1070
Local Time
USU Personal Contest 2001
2111
661
1071
Nikifor 2
USU Personal Contest 2001
2229
626
1072
Routing
USU Personal Contest 2001
2785
502
1073
Square Country
USU Personal Contest 2001
9998
140
1074
Very Short Problem
USU Personal Contest 2001
654
2112
1075
Thread in a Space
USU Personal Contest 2001
691
2001
1076
Trash
1950
712
1077
Travelling Tours
1268
395
1078
Segments
Winter Mathematical Festival Varna 2001
3907
354
1079
Maximum
Winter Mathematical Festival Varna 2001
12479
111
1080
Map Coloring
Winter Mathematical Festival Varna 2001
7288
190
1081
Binary Lexicographic Sequence
Winter Mathematical Festival Varna 2001
5143
269
1082
Gaby Ivanushka
Spring School Contest 2001
10906
126
1083
Factorials!!!
Spring School Contest 2001
20228
68
1084
Goat in the Garden
Spring School Contest 2001
9162
150
1085
Meeting
Spring School Contest 2001
2186
626
1086
Cryptography
Spring School Contest 2001
12930
106
1087
The Time to Take Stones
Spring School Contest 2001
4961
277
1088
Ilya Murometz
Spring School Contest 2001
1825
750
1089
Verification with the Dictionary
Spring School Contest 2001
1626
841
1090
In the Army Now
USU Local Contest. March 2001
3563
366
1091
Tmutarakan Exams
USU Local Contest. March 2001
2471
527
1092
Transversal
USU Local Contest. March 2001
552
2325
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
1827
711
1097
Square Country 2
USU Local Contest. March 2001
948
1364
1098
Questions
2238
556
1099
Work Scheduling
1017
1151
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