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Problem set. Volume 1
Solved problems:
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ID
Title
Source
Authors
Difficulty
1000
A+B Problem
106446
16
1001
Reverse Root
33583
14
1002
Phone Numbers
Central European Olympiad in Informatics 1999
6938
225
1003
Parity
Central European Olympiad in Informatics 1999
4050
386
1004
Sightseeing Trip
Central European Olympiad in Informatics 1999
2682
582
1005
Stone Pile
USU Championship 1997
19997
78
1006
Square Frames
USU Championship 1997
1579
984
1007
Code Words
USU Championship 1997
3875
403
1008
Image Encoding
USTU PhysTech Cup 2000
4265
366
1009
K-based Numbers
USU Championship 1997
16569
94
1010
Discrete Function
USTU PhysTech Cup 2000
5346
292
1011
Conductors
USU Championship 1997
6318
247
1012
K-based Numbers. Version 2
8697
179
1013
K-based Numbers. Version 3
1324
196
1014
Product of Digits
USU Local Contest. 1999
16591
94
1015
Test the Difference!
USU Local Contest. 1999
3425
454
1016
Cube on the Walk
USU Local Contest. 1999
1889
821
1017
Staircases
USU Local Contest. 1999
9918
157
1018
Binary Apple Tree
USU Local Contest. 1999
5567
279
1019
Line Painting
USU Local Contest. 1999
3359
463
1020
Rope
Autumn School Contest 2000
15641
100
1021
Sacrament of the Sum
Autumn School Contest 2000
10539
148
1022
Genealogical Tree
Autumn School Contest 2000
10997
141
1023
Buttons
Autumn School Contest 2000
7203
216
1024
Permutations
Autumn School Contest 2000
4867
319
1025
Democracy in Danger
Autumn School Contest 2000
23231
67
1026
Questions and Answers
Autumn School Contest 2000
9887
157
1027
D++ Again
Autumn School Contest 2000
2445
634
1028
Stars
Ural Championship 1999
5887
263
1029
Ministry
Ural Championship 1999
3809
354
1030
Titanic
Ural Championship 1999
1723
896
1031
Railway Tickets
Ural Championship 1999
3989
388
1032
Find a Multiple
Ural Championship 1999
4483
301
1033
Labyrinth
Ural Championship 1999
6565
236
1034
Queens in Peaceful Positions
Ural Championship 1999
1902
812
1035
Cross-stitch
Ural Championship 1999
1122
1368
1036
Lucky Tickets
5097
304
1037
Memory Management
USU Championship 2000
1297
1176
1038
Spell Checker
USU Championship 2000
3157
486
1039
Anniversary Party
USU Championship 2000
3990
384
1040
Airline Company
USU Championship 2000
1526
1001
1041
Nikifor
USU Championship 2000
309
4820
1042
Central Heating
USU Championship 2000
1891
809
1043
Cover an Arc
USU Championship 2000
927
1641
1044
Lucky Tickets. Easy!
USU Championship 2000
12611
122
1045
Funny Game
USU Local Contest. March 2000
2907
521
1046
Geometrical Dreams
USU Local Contest. March 2000
795
1887
1047
Simple Calculations
USU Local Contest. March 2000
5024
302
1048
Superlong Sums
USU Local Contest. March 2000
7568
200
1049
Brave Balloonists
USU Local Contest. March 2000
6105
249
1050
Preparing an Article
USU Local Contest. March 2000
1045
1440
1051
Simple Game on a Grid
USU Local Contest. March 2000
2852
531
1052
Rabbit Hunt
USU Local Contest. March 2000
6398
237
1053
Pinocchio
NEERC 2000 Central Subregional
4433
341
1054
Tower of Hanoi
NEERC 2000 Central Subregional
2357
640
1055
Combinations
NEERC 2000 Central Subregional
3596
420
1056
Centers of the Net
NEERC 2000 Central Subregional
2746
550
1057
Amount of Degrees
NEERC 2000 Central Subregional
2108
716
1058
Chocolate
NEERC 2000 Central Subregional
528
2811
1059
Expression
NEERC 2000 Central Subregional
2231
676
1060
Flip Game
NEERC 2000
3833
373
1061
Buffer Manager
NEERC 2000
2147
665
1062
Triathlon
NEERC 2000
771
1836
1063
Domino Puzzle
NEERC 2000
637
2216
1064
Binary Search
NEERC 2000
2183
654
1065
Frontier
NEERC 2000
1009
1408
1066
Garland
NEERC 2000
2475
577
1067
Disk Tree
NEERC 2000
3946
362
1068
Sum
39246
37
1069
Prufer Code
USU Personal Contest 2001
2689
517
1070
Local Time
USU Personal Contest 2001
2105
659
1071
Nikifor 2
USU Personal Contest 2001
2227
623
1072
Routing
USU Personal Contest 2001
2767
502
1073
Square Country
USU Personal Contest 2001
9893
141
1074
Very Short Problem
USU Personal Contest 2001
649
2116
1075
Thread in a Space
USU Personal Contest 2001
683
2012
1076
Trash
1941
711
1077
Travelling Tours
1257
396
1078
Segments
Winter Mathematical Festival Varna 2001
3891
354
1079
Maximum
Winter Mathematical Festival Varna 2001
12413
111
1080
Map Coloring
Winter Mathematical Festival Varna 2001
7257
190
1081
Binary Lexicographic Sequence
Winter Mathematical Festival Varna 2001
5127
269
1082
Gaby Ivanushka
Spring School Contest 2001
10887
126
1083
Factorials!!!
Spring School Contest 2001
20161
68
1084
Goat in the Garden
Spring School Contest 2001
9141
149
1085
Meeting
Spring School Contest 2001
2178
625
1086
Cryptography
Spring School Contest 2001
12859
106
1087
The Time to Take Stones
Spring School Contest 2001
4952
276
1088
Ilya Murometz
Spring School Contest 2001
1824
746
1089
Verification with the Dictionary
Spring School Contest 2001
1621
839
1090
In the Army Now
USU Local Contest. March 2001
3555
365
1091
Tmutarakan Exams
USU Local Contest. March 2001
2463
525
1092
Transversal
USU Local Contest. March 2001
549
2324
1093
Darts
USU Local Contest. March 2001
641
1996
1094
E-screen
USU Local Contest. March 2001
2817
460
1095
Nikifor 3
USU Local Contest. March 2001
2241
577
1096
Get the Right Route Plate!
USU Local Contest. March 2001
1823
709
1097
Square Country 2
USU Local Contest. March 2001
943
1363
1098
Questions
2235
553
1099
Work Scheduling
1011
1151
Solved problems:
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