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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
105814
16
1001
Reverse Root
33323
14
1002
Phone Numbers
Central European Olympiad in Informatics 1999
6897
225
1003
Parity
Central European Olympiad in Informatics 1999
4020
386
1004
Sightseeing Trip
Central European Olympiad in Informatics 1999
2663
581
1005
Stone Pile
USU Championship 1997
19882
78
1006
Square Frames
USU Championship 1997
1575
979
1007
Code Words
USU Championship 1997
3861
401
1008
Image Encoding
USTU PhysTech Cup 2000
4254
364
1009
K-based Numbers
USU Championship 1997
16501
94
1010
Discrete Function
USTU PhysTech Cup 2000
5333
290
1011
Conductors
USU Championship 1997
6287
246
1012
K-based Numbers. Version 2
8666
178
1013
K-based Numbers. Version 3
1307
194
1014
Product of Digits
USU Local Contest. 1999
16505
94
1015
Test the Difference!
USU Local Contest. 1999
3415
452
1016
Cube on the Walk
USU Local Contest. 1999
1884
816
1017
Staircases
USU Local Contest. 1999
9884
156
1018
Binary Apple Tree
USU Local Contest. 1999
5544
278
1019
Line Painting
USU Local Contest. 1999
3348
461
1020
Rope
Autumn School Contest 2000
15578
99
1021
Sacrament of the Sum
Autumn School Contest 2000
10512
147
1022
Genealogical Tree
Autumn School Contest 2000
10951
141
1023
Buttons
Autumn School Contest 2000
7182
215
1024
Permutations
Autumn School Contest 2000
4847
318
1025
Democracy in Danger
Autumn School Contest 2000
23145
67
1026
Questions and Answers
Autumn School Contest 2000
9863
156
1027
D++ Again
Autumn School Contest 2000
2440
631
1028
Stars
Ural Championship 1999
5815
264
1029
Ministry
Ural Championship 1999
3791
353
1030
Titanic
Ural Championship 1999
1718
891
1031
Railway Tickets
Ural Championship 1999
3981
386
1032
Find a Multiple
Ural Championship 1999
4459
300
1033
Labyrinth
Ural Championship 1999
6544
235
1034
Queens in Peaceful Positions
Ural Championship 1999
1898
807
1035
Cross-stitch
Ural Championship 1999
1120
1360
1036
Lucky Tickets
5084
302
1037
Memory Management
USU Championship 2000
1291
1173
1038
Spell Checker
USU Championship 2000
3151
483
1039
Anniversary Party
USU Championship 2000
3974
383
1040
Airline Company
USU Championship 2000
1514
1001
1041
Nikifor
USU Championship 2000
306
4829
1042
Central Heating
USU Championship 2000
1874
810
1043
Cover an Arc
USU Championship 2000
924
1634
1044
Lucky Tickets. Easy!
USU Championship 2000
12564
121
1045
Funny Game
USU Local Contest. March 2000
2899
518
1046
Geometrical Dreams
USU Local Contest. March 2000
790
1884
1047
Simple Calculations
USU Local Contest. March 2000
5012
300
1048
Superlong Sums
USU Local Contest. March 2000
7540
199
1049
Brave Balloonists
USU Local Contest. March 2000
6088
247
1050
Preparing an Article
USU Local Contest. March 2000
1040
1436
1051
Simple Game on a Grid
USU Local Contest. March 2000
2845
528
1052
Rabbit Hunt
USU Local Contest. March 2000
6375
236
1053
Pinocchio
NEERC 2000 Central Subregional
4422
339
1054
Tower of Hanoi
NEERC 2000 Central Subregional
2344
639
1055
Combinations
NEERC 2000 Central Subregional
3589
418
1056
Centers of the Net
NEERC 2000 Central Subregional
2734
548
1057
Amount of Degrees
NEERC 2000 Central Subregional
2098
714
1058
Chocolate
NEERC 2000 Central Subregional
527
2795
1059
Expression
NEERC 2000 Central Subregional
2226
673
1060
Flip Game
NEERC 2000
3820
372
1061
Buffer Manager
NEERC 2000
2140
663
1062
Triathlon
NEERC 2000
770
1825
1063
Domino Puzzle
NEERC 2000
633
2213
1064
Binary Search
NEERC 2000
2179
651
1065
Frontier
NEERC 2000
1005
1403
1066
Garland
NEERC 2000
2467
575
1067
Disk Tree
NEERC 2000
3922
362
1068
Sum
38934
37
1069
Prufer Code
USU Personal Contest 2001
2680
515
1070
Local Time
USU Personal Contest 2001
2095
658
1071
Nikifor 2
USU Personal Contest 2001
2219
621
1072
Routing
USU Personal Contest 2001
2759
500
1073
Square Country
USU Personal Contest 2001
9858
140
1074
Very Short Problem
USU Personal Contest 2001
648
2103
1075
Thread in a Space
USU Personal Contest 2001
681
2003
1076
Trash
1934
708
1077
Travelling Tours
1247
397
1078
Segments
Winter Mathematical Festival Varna 2001
3878
352
1079
Maximum
Winter Mathematical Festival Varna 2001
12367
111
1080
Map Coloring
Winter Mathematical Festival Varna 2001
7205
190
1081
Binary Lexicographic Sequence
Winter Mathematical Festival Varna 2001
5107
268
1082
Gaby Ivanushka
Spring School Contest 2001
10867
125
1083
Factorials!!!
Spring School Contest 2001
20084
68
1084
Goat in the Garden
Spring School Contest 2001
9066
150
1085
Meeting
Spring School Contest 2001
2171
622
1086
Cryptography
Spring School Contest 2001
12823
106
1087
The Time to Take Stones
Spring School Contest 2001
4940
274
1088
Ilya Murometz
Spring School Contest 2001
1815
744
1089
Verification with the Dictionary
Spring School Contest 2001
1614
836
1090
In the Army Now
USU Local Contest. March 2001
3540
363
1091
Tmutarakan Exams
USU Local Contest. March 2001
2451
524
1092
Transversal
USU Local Contest. March 2001
547
2315
1093
Darts
USU Local Contest. March 2001
639
1987
1094
E-screen
USU Local Contest. March 2001
2808
458
1095
Nikifor 3
USU Local Contest. March 2001
2232
575
1096
Get the Right Route Plate!
USU Local Contest. March 2001
1818
706
1097
Square Country 2
USU Local Contest. March 2001
940
1357
1098
Questions
2225
551
1099
Work Scheduling
1008
1146
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