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Problem set. Volume 1
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ID
Title
Source
Authors
Difficulty
1001
Reverse Root
32512
14
1000
A+B Problem
103796
16
1068
Sum
38167
37
1025
Democracy in Danger
Autumn School Contest 2000
22745
67
1083
Factorials!!!
Spring School Contest 2001
19799
67
1005
Stone Pile
USU Championship 1997
19349
79
1014
Product of Digits
USU Local Contest. 1999
16204
93
1009
K-based Numbers
USU Championship 1997
16233
94
1020
Rope
Autumn School Contest 2000
15314
99
1086
Cryptography
Spring School Contest 2001
12609
105
1079
Maximum
Winter Mathematical Festival Varna 2001
12206
110
1044
Lucky Tickets. Easy!
USU Championship 2000
12414
120
1082
Gaby Ivanushka
Spring School Contest 2001
10786
123
1022
Genealogical Tree
Autumn School Contest 2000
10834
140
1073
Square Country
USU Personal Contest 2001
9608
141
1021
Sacrament of the Sum
Autumn School Contest 2000
10385
146
1084
Goat in the Garden
Spring School Contest 2001
8922
149
1017
Staircases
USU Local Contest. 1999
9735
156
1026
Questions and Answers
Autumn School Contest 2000
9722
156
1012
K-based Numbers. Version 2
8573
177
1013
K-based Numbers. Version 3
1246
192
1048
Superlong Sums
USU Local Contest. March 2000
7462
197
1080
Map Coloring
Winter Mathematical Festival Varna 2001
6778
198
1023
Buttons
Autumn School Contest 2000
7119
212
1002
Phone Numbers
Central European Olympiad in Informatics 1999
6796
223
1033
Labyrinth
Ural Championship 1999
6488
232
1052
Rabbit Hunt
USU Local Contest. March 2000
6324
233
1011
Conductors
USU Championship 1997
6215
244
1049
Brave Balloonists
USU Local Contest. March 2000
6010
245
1028
Stars
Ural Championship 1999
5721
263
1081
Binary Lexicographic Sequence
Winter Mathematical Festival Varna 2001
5074
264
1087
The Time to Take Stones
Spring School Contest 2001
4900
271
1018
Binary Apple Tree
USU Local Contest. 1999
5478
276
1010
Discrete Function
USTU PhysTech Cup 2000
5299
286
1047
Simple Calculations
USU Local Contest. March 2000
4997
295
1032
Find a Multiple
Ural Championship 1999
4384
299
1036
Lucky Tickets
5009
301
1024
Permutations
Autumn School Contest 2000
4808
314
1053
Pinocchio
NEERC 2000 Central Subregional
4397
334
1029
Ministry
Ural Championship 1999
3760
348
1078
Segments
Winter Mathematical Festival Varna 2001
3842
348
1008
Image Encoding
USTU PhysTech Cup 2000
4226
359
1090
In the Army Now
USU Local Contest. March 2001
3501
360
1060
Flip Game
NEERC 2000
3793
367
1067
Disk Tree
NEERC 2000
3750
371
1031
Railway Tickets
Ural Championship 1999
3950
381
1039
Anniversary Party
USU Championship 2000
3915
381
1003
Parity
Central European Olympiad in Informatics 1999
3954
384
1077
Travelling Tours
1226
395
1007
Code Words
USU Championship 1997
3830
396
1055
Combinations
NEERC 2000 Central Subregional
3555
413
1015
Test the Difference!
USU Local Contest. 1999
3387
446
1094
E-screen
USU Local Contest. March 2001
2783
453
1019
Line Painting
USU Local Contest. 1999
3303
458
1038
Spell Checker
USU Championship 2000
3124
477
1072
Routing
USU Personal Contest 2001
2742
493
1045
Funny Game
USU Local Contest. March 2000
2852
516
1069
Prufer Code
USU Personal Contest 2001
2621
516
1051
Simple Game on a Grid
USU Local Contest. March 2000
2825
521
1091
Tmutarakan Exams
USU Local Contest. March 2001
2407
523
1098
Questions
2209
544
1056
Centers of the Net
NEERC 2000 Central Subregional
2695
545
1066
Garland
NEERC 2000
2448
567
1095
Nikifor 3
USU Local Contest. March 2001
2213
569
1004
Sightseeing Trip
Central European Olympiad in Informatics 1999
2614
580
1071
Nikifor 2
USU Personal Contest 2001
2199
614
1085
Meeting
Spring School Contest 2001
2147
617
1027
D++ Again
Autumn School Contest 2000
2422
622
1054
Tower of Hanoi
NEERC 2000 Central Subregional
2285
642
1064
Binary Search
NEERC 2000
2159
644
1070
Local Time
USU Personal Contest 2001
2076
650
1061
Buffer Manager
NEERC 2000
2127
653
1059
Expression
NEERC 2000 Central Subregional
2212
663
1096
Get the Right Route Plate!
USU Local Contest. March 2001
1795
700
1076
Trash
1911
702
1057
Amount of Degrees
NEERC 2000 Central Subregional
2054
714
1088
Ilya Murometz
Spring School Contest 2001
1804
733
1034
Queens in Peaceful Positions
Ural Championship 1999
1883
797
1042
Central Heating
USU Championship 2000
1848
805
1016
Cube on the Walk
USU Local Contest. 1999
1868
807
1089
Verification with the Dictionary
Spring School Contest 2001
1591
831
1030
Titanic
Ural Championship 1999
1711
877
1006
Square Frames
USU Championship 1997
1563
966
1040
Airline Company
USU Championship 2000
1496
993
1099
Work Scheduling
994
1139
1037
Memory Management
USU Championship 2000
1269
1169
1035
Cross-stitch
Ural Championship 1999
1120
1332
1097
Square Country 2
USU Local Contest. March 2001
923
1354
1065
Frontier
NEERC 2000
995
1389
1050
Preparing an Article
USU Local Contest. March 2000
1028
1423
1043
Cover an Arc
USU Championship 2000
913
1620
1062
Triathlon
NEERC 2000
765
1800
1046
Geometrical Dreams
USU Local Contest. March 2000
782
1865
1093
Darts
USU Local Contest. March 2001
635
1959
1075
Thread in a Space
USU Personal Contest 2001
661
2021
1074
Very Short Problem
USU Personal Contest 2001
632
2113
1063
Domino Puzzle
NEERC 2000
627
2189
1092
Transversal
USU Local Contest. March 2001
541
2294
1058
Chocolate
NEERC 2000 Central Subregional
518
2785
1041
Nikifor
USU Championship 2000
295
4902
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