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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
100504
16
1001
Reverse Root
31201
15
1002
Phone Numbers
Central European Olympiad in Informatics 1999
6673
222
1003
Parity
Central European Olympiad in Informatics 1999
3869
382
1004
Sightseeing Trip
Central European Olympiad in Informatics 1999
2561
577
1005
Stone Pile
USU Championship 1997
17922
83
1006
Square Frames
USU Championship 1997
1551
948
1007
Code Words
USU Championship 1997
3780
391
1008
Image Encoding
USTU PhysTech Cup 2000
4149
356
1009
K-based Numbers
USU Championship 1997
15935
93
1010
Discrete Function
USTU PhysTech Cup 2000
5240
282
1011
Conductors
USU Championship 1997
6091
242
1012
K-based Numbers. Version 2
8424
175
1013
K-based Numbers. Version 3
1162
190
1014
Product of Digits
USU Local Contest. 1999
15624
94
1015
Test the Difference!
USU Local Contest. 1999
3349
439
1016
Cube on the Walk
USU Local Contest. 1999
1846
795
1017
Staircases
USU Local Contest. 1999
9540
155
1018
Binary Apple Tree
USU Local Contest. 1999
5381
274
1019
Line Painting
USU Local Contest. 1999
3264
451
1020
Rope
Autumn School Contest 2000
14850
99
1021
Sacrament of the Sum
Autumn School Contest 2000
10182
145
1022
Genealogical Tree
Autumn School Contest 2000
10647
138
1023
Buttons
Autumn School Contest 2000
7025
210
1024
Permutations
Autumn School Contest 2000
4741
310
1025
Democracy in Danger
Autumn School Contest 2000
22020
67
1026
Questions and Answers
Autumn School Contest 2000
9440
156
1027
D++ Again
Autumn School Contest 2000
2400
612
1028
Stars
Ural Championship 1999
5587
263
1029
Ministry
Ural Championship 1999
3699
345
1030
Titanic
Ural Championship 1999
1692
863
1031
Railway Tickets
Ural Championship 1999
3889
377
1032
Find a Multiple
Ural Championship 1999
4291
297
1033
Labyrinth
Ural Championship 1999
6367
230
1034
Queens in Peaceful Positions
Ural Championship 1999
1866
783
1035
Cross-stitch
Ural Championship 1999
1104
1316
1036
Lucky Tickets
4910
299
1037
Memory Management
USU Championship 2000
1245
1160
1038
Spell Checker
USU Championship 2000
3096
469
1039
Anniversary Party
USU Championship 2000
3844
378
1040
Airline Company
USU Championship 2000
1468
985
1041
Nikifor
USU Championship 2000
639
2243
1042
Central Heating
USU Championship 2000
1812
799
1043
Cover an Arc
USU Championship 2000
898
1603
1044
Lucky Tickets. Easy!
USU Championship 2000
12117
120
1045
Funny Game
USU Local Contest. March 2000
2785
515
1046
Geometrical Dreams
USU Local Contest. March 2000
765
1856
1047
Simple Calculations
USU Local Contest. March 2000
4956
290
1048
Superlong Sums
USU Local Contest. March 2000
7343
195
1049
Brave Balloonists
USU Local Contest. March 2000
5906
243
1050
Preparing an Article
USU Local Contest. March 2000
1021
1395
1051
Simple Game on a Grid
USU Local Contest. March 2000
2796
513
1052
Rabbit Hunt
USU Local Contest. March 2000
6217
231
1053
Pinocchio
NEERC 2000 Central Subregional
4345
330
1054
Tower of Hanoi
NEERC 2000 Central Subregional
2191
652
1055
Combinations
NEERC 2000 Central Subregional
3504
409
1056
Centers of the Net
NEERC 2000 Central Subregional
2646
540
1057
Amount of Degrees
NEERC 2000 Central Subregional
2016
709
1058
Chocolate
NEERC 2000 Central Subregional
508
2765
1059
Expression
NEERC 2000 Central Subregional
2189
653
1060
Flip Game
NEERC 2000
3742
362
1061
Buffer Manager
NEERC 2000
2103
643
1062
Triathlon
NEERC 2000
745
1799
1063
Domino Puzzle
NEERC 2000
617
2166
1064
Binary Search
NEERC 2000
2133
634
1065
Frontier
NEERC 2000
983
1369
1066
Garland
NEERC 2000
2421
559
1067
Disk Tree
NEERC 2000
3026
447
1068
Sum
36812
37
1069
Prufer Code
USU Personal Contest 2001
2528
521
1070
Local Time
USU Personal Contest 2001
2031
647
1071
Nikifor 2
USU Personal Contest 2001
2175
605
1072
Routing
USU Personal Contest 2001
2709
486
1073
Square Country
USU Personal Contest 2001
9193
144
1074
Very Short Problem
USU Personal Contest 2001
624
2084
1075
Thread in a Space
USU Personal Contest 2001
644
2020
1076
Trash
1889
692
1077
Travelling Tours
1183
399
1078
Segments
Winter Mathematical Festival Varna 2001
3784
344
1079
Maximum
Winter Mathematical Festival Varna 2001
11920
110
1080
Map Coloring
Winter Mathematical Festival Varna 2001
6038
216
1081
Binary Lexicographic Sequence
Winter Mathematical Festival Varna 2001
4993
261
1082
Gaby Ivanushka
Spring School Contest 2001
10638
122
1083
Factorials!!!
Spring School Contest 2001
19233
67
1084
Goat in the Garden
Spring School Contest 2001
8737
148
1085
Meeting
Spring School Contest 2001
2111
611
1086
Cryptography
Spring School Contest 2001
12209
106
1087
The Time to Take Stones
Spring School Contest 2001
4834
267
1088
Ilya Murometz
Spring School Contest 2001
1784
722
1089
Verification with the Dictionary
Spring School Contest 2001
1551
830
1090
In the Army Now
USU Local Contest. March 2001
3542
347
1091
Tmutarakan Exams
USU Local Contest. March 2001
2355
521
1092
Transversal
USU Local Contest. March 2001
533
2267
1093
Darts
USU Local Contest. March 2001
617
1964
1094
E-screen
USU Local Contest. March 2001
2747
447
1095
Nikifor 3
USU Local Contest. March 2001
2191
559
1096
Get the Right Route Plate!
USU Local Contest. March 2001
1764
694
1097
Square Country 2
USU Local Contest. March 2001
910
1338
1098
Questions
2174
539
1099
Work Scheduling
963
1145
Solved problems:
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