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Problem set. Volume 1
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ID
Title
Source
Authors
Difficulty
1000
A+B Problem
98267
16
1001
Reverse Root
30312
15
1002
Phone Numbers
Central European Olympiad in Informatics 1999
6613
220
1003
Parity
Central European Olympiad in Informatics 1999
3812
382
1004
Sightseeing Trip
Central European Olympiad in Informatics 1999
2564
567
1005
Stone Pile
USU Championship 1997
17526
83
1006
Square Frames
USU Championship 1997
1544
937
1007
Code Words
USU Championship 1997
3756
387
1008
Image Encoding
USTU PhysTech Cup 2000
4126
352
1009
K-based Numbers
USU Championship 1997
15647
93
1010
Discrete Function
USTU PhysTech Cup 2000
5201
279
1011
Conductors
USU Championship 1997
6055
240
1012
K-based Numbers. Version 2
8320
174
1013
K-based Numbers. Version 3
1123
186
1014
Product of Digits
USU Local Contest. 1999
15320
95
1015
Test the Difference!
USU Local Contest. 1999
3334
434
1016
Cube on the Walk
USU Local Contest. 1999
1833
788
1017
Staircases
USU Local Contest. 1999
9420
154
1018
Binary Apple Tree
USU Local Contest. 1999
5213
278
1019
Line Painting
USU Local Contest. 1999
3245
446
1020
Rope
Autumn School Contest 2000
14613
99
1021
Sacrament of the Sum
Autumn School Contest 2000
10077
144
1022
Genealogical Tree
Autumn School Contest 2000
10555
137
1023
Buttons
Autumn School Contest 2000
6958
208
1024
Permutations
Autumn School Contest 2000
4699
308
1025
Democracy in Danger
Autumn School Contest 2000
21593
67
1026
Questions and Answers
Autumn School Contest 2000
9237
157
1027
D++ Again
Autumn School Contest 2000
2388
605
1028
Stars
Ural Championship 1999
5539
261
1029
Ministry
Ural Championship 1999
3663
343
1030
Titanic
Ural Championship 1999
1685
853
1031
Railway Tickets
Ural Championship 1999
3864
373
1032
Find a Multiple
Ural Championship 1999
4207
299
1033
Labyrinth
Ural Championship 1999
6238
231
1034
Queens in Peaceful Positions
Ural Championship 1999
1856
775
1035
Cross-stitch
Ural Championship 1999
1081
1322
1036
Lucky Tickets
4851
297
1037
Memory Management
USU Championship 2000
1239
1147
1038
Spell Checker
USU Championship 2000
3076
464
1039
Anniversary Party
USU Championship 2000
3800
376
1040
Airline Company
USU Championship 2000
1456
977
1041
Nikifor
USU Championship 2000
628
2245
1042
Central Heating
USU Championship 2000
1788
797
1043
Cover an Arc
USU Championship 2000
886
1599
1044
Lucky Tickets. Easy!
USU Championship 2000
11947
120
1045
Funny Game
USU Local Contest. March 2000
2759
511
1046
Geometrical Dreams
USU Local Contest. March 2000
757
1845
1047
Simple Calculations
USU Local Contest. March 2000
4916
287
1048
Superlong Sums
USU Local Contest. March 2000
7278
194
1049
Brave Balloonists
USU Local Contest. March 2000
5857
241
1050
Preparing an Article
USU Local Contest. March 2000
1016
1379
1051
Simple Game on a Grid
USU Local Contest. March 2000
2779
507
1052
Rabbit Hunt
USU Local Contest. March 2000
6174
229
1053
Pinocchio
NEERC 2000 Central Subregional
4319
326
1054
Tower of Hanoi
NEERC 2000 Central Subregional
2169
648
1055
Combinations
NEERC 2000 Central Subregional
3482
405
1056
Centers of the Net
NEERC 2000 Central Subregional
2622
537
1057
Amount of Degrees
NEERC 2000 Central Subregional
1994
705
1058
Chocolate
NEERC 2000 Central Subregional
492
2807
1059
Expression
NEERC 2000 Central Subregional
2177
646
1060
Flip Game
NEERC 2000
3721
359
1061
Buffer Manager
NEERC 2000
2087
638
1062
Triathlon
NEERC 2000
735
1794
1063
Domino Puzzle
NEERC 2000
612
2148
1064
Binary Search
NEERC 2000
2123
627
1065
Frontier
NEERC 2000
977
1355
1066
Garland
NEERC 2000
2400
555
1067
Disk Tree
NEERC 2000
2951
451
1068
Sum
35981
37
1069
Prufer Code
USU Personal Contest 2001
2508
516
1070
Local Time
USU Personal Contest 2001
2020
640
1071
Nikifor 2
USU Personal Contest 2001
2158
600
1072
Routing
USU Personal Contest 2001
2637
491
1073
Square Country
USU Personal Contest 2001
8940
145
1074
Very Short Problem
USU Personal Contest 2001
619
2067
1075
Thread in a Space
USU Personal Contest 2001
629
2035
1076
Trash
1880
684
1077
Travelling Tours
1171
397
1078
Segments
Winter Mathematical Festival Varna 2001
3632
353
1079
Maximum
Winter Mathematical Festival Varna 2001
11755
109
1080
Map Coloring
Winter Mathematical Festival Varna 2001
5937
216
1081
Binary Lexicographic Sequence
Winter Mathematical Festival Varna 2001
4944
260
1082
Gaby Ivanushka
Spring School Contest 2001
10532
121
1083
Factorials!!!
Spring School Contest 2001
18833
68
1084
Goat in the Garden
Spring School Contest 2001
8634
148
1085
Meeting
Spring School Contest 2001
2094
606
1086
Cryptography
Spring School Contest 2001
11930
107
1087
The Time to Take Stones
Spring School Contest 2001
4662
273
1088
Ilya Murometz
Spring School Contest 2001
1771
716
1089
Verification with a Vocabulary
Spring School Contest 2001
2715
468
1090
In the Army Now
USU Local Contest. March 2001
3463
349
1091
Tmutarakan Exams
USU Local Contest. March 2001
2338
516
1092
Transversal
USU Local Contest. March 2001
533
2231
1093
Darts
USU Local Contest. March 2001
614
1942
1094
E-screen
USU Local Contest. March 2001
2731
442
1095
Nikifor 3
USU Local Contest. March 2001
2147
562
1096
Get the Right Route Plate!
USU Local Contest. March 2001
1755
686
1097
Square Country 2
USU Local Contest. March 2001
904
1326
1098
Questions
2161
533
1099
Work Scheduling
955
1136
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