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Problem set. Volume 1
Solved problems:
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ID
Title
Source
Authors
Difficulty
1000
A+B Problem
104035
16
1001
Reverse Root
32612
14
1002
Phone Numbers
Central European Olympiad in Informatics 1999
6813
223
1003
Parity
Central European Olympiad in Informatics 1999
3959
384
1004
Sightseeing Trip
Central European Olympiad in Informatics 1999
2629
578
1005
Stone Pile
USU Championship 1997
19413
79
1006
Square Frames
USU Championship 1997
1564
968
1007
Code Words
USU Championship 1997
3834
397
1008
Image Encoding
USTU PhysTech Cup 2000
4231
359
1009
K-based Numbers
USU Championship 1997
16256
94
1010
Discrete Function
USTU PhysTech Cup 2000
5304
287
1011
Conductors
USU Championship 1997
6219
244
1012
K-based Numbers. Version 2
8586
177
1013
K-based Numbers. Version 3
1256
192
1014
Product of Digits
USU Local Contest. 1999
16241
93
1015
Test the Difference!
USU Local Contest. 1999
3390
447
1016
Cube on the Walk
USU Local Contest. 1999
1870
808
1017
Staircases
USU Local Contest. 1999
9748
156
1018
Binary Apple Tree
USU Local Contest. 1999
5487
276
1019
Line Painting
USU Local Contest. 1999
3306
458
1020
Rope
Autumn School Contest 2000
15348
99
1021
Sacrament of the Sum
Autumn School Contest 2000
10396
146
1022
Genealogical Tree
Autumn School Contest 2000
10842
140
1023
Buttons
Autumn School Contest 2000
7124
213
1024
Permutations
Autumn School Contest 2000
4816
314
1025
Democracy in Danger
Autumn School Contest 2000
22791
67
1026
Questions and Answers
Autumn School Contest 2000
9739
156
1027
D++ Again
Autumn School Contest 2000
2425
623
1028
Stars
Ural Championship 1999
5754
262
1029
Ministry
Ural Championship 1999
3765
349
1030
Titanic
Ural Championship 1999
1713
878
1031
Railway Tickets
Ural Championship 1999
3955
381
1032
Find a Multiple
Ural Championship 1999
4410
298
1033
Labyrinth
Ural Championship 1999
6491
233
1034
Queens in Peaceful Positions
Ural Championship 1999
1886
798
1035
Cross-stitch
Ural Championship 1999
1120
1336
1036
Lucky Tickets
5025
300
1037
Memory Management
USU Championship 2000
1271
1170
1038
Spell Checker
USU Championship 2000
3126
478
1039
Anniversary Party
USU Championship 2000
3924
381
1040
Airline Company
USU Championship 2000
1499
993
1041
Nikifor
USU Championship 2000
294
4929
1042
Central Heating
USU Championship 2000
1852
805
1043
Cover an Arc
USU Championship 2000
915
1620
1044
Lucky Tickets. Easy!
USU Championship 2000
12436
120
1045
Funny Game
USU Local Contest. March 2000
2872
514
1046
Geometrical Dreams
USU Local Contest. March 2000
784
1864
1047
Simple Calculations
USU Local Contest. March 2000
4998
296
1048
Superlong Sums
USU Local Contest. March 2000
7467
198
1049
Brave Balloonists
USU Local Contest. March 2000
6014
246
1050
Preparing an Article
USU Local Contest. March 2000
1030
1423
1051
Simple Game on a Grid
USU Local Contest. March 2000
2829
521
1052
Rabbit Hunt
USU Local Contest. March 2000
6331
234
1053
Pinocchio
NEERC 2000 Central Subregional
4400
335
1054
Tower of Hanoi
NEERC 2000 Central Subregional
2311
637
1055
Combinations
NEERC 2000 Central Subregional
3568
413
1056
Centers of the Net
NEERC 2000 Central Subregional
2703
545
1057
Amount of Degrees
NEERC 2000 Central Subregional
2082
706
1058
Chocolate
NEERC 2000 Central Subregional
518
2792
1059
Expression
NEERC 2000 Central Subregional
2214
664
1060
Flip Game
NEERC 2000
3794
368
1061
Buffer Manager
NEERC 2000
2128
654
1062
Triathlon
NEERC 2000
766
1802
1063
Domino Puzzle
NEERC 2000
627
2194
1064
Binary Search
NEERC 2000
2164
644
1065
Frontier
NEERC 2000
996
1390
1066
Garland
NEERC 2000
2451
568
1067
Disk Tree
NEERC 2000
3801
367
1068
Sum
38244
37
1069
Prufer Code
USU Personal Contest 2001
2632
515
1070
Local Time
USU Personal Contest 2001
2079
651
1071
Nikifor 2
USU Personal Contest 2001
2200
615
1072
Routing
USU Personal Contest 2001
2744
494
1073
Square Country
USU Personal Contest 2001
9629
141
1074
Very Short Problem
USU Personal Contest 2001
634
2111
1075
Thread in a Space
USU Personal Contest 2001
662
2023
1076
Trash
1914
703
1077
Travelling Tours
1229
395
1078
Segments
Winter Mathematical Festival Varna 2001
3849
349
1079
Maximum
Winter Mathematical Festival Varna 2001
12228
110
1080
Map Coloring
Winter Mathematical Festival Varna 2001
6996
192
1081
Binary Lexicographic Sequence
Winter Mathematical Festival Varna 2001
5077
264
1082
Gaby Ivanushka
Spring School Contest 2001
10800
123
1083
Factorials!!!
Spring School Contest 2001
19832
67
1084
Goat in the Garden
Spring School Contest 2001
8937
149
1085
Meeting
Spring School Contest 2001
2154
616
1086
Cryptography
Spring School Contest 2001
12631
105
1087
The Time to Take Stones
Spring School Contest 2001
4900
272
1088
Ilya Murometz
Spring School Contest 2001
1807
734
1089
Verification with the Dictionary
Spring School Contest 2001
1594
831
1090
In the Army Now
USU Local Contest. March 2001
3511
360
1091
Tmutarakan Exams
USU Local Contest. March 2001
2428
520
1092
Transversal
USU Local Contest. March 2001
543
2291
1093
Darts
USU Local Contest. March 2001
636
1961
1094
E-screen
USU Local Contest. March 2001
2786
453
1095
Nikifor 3
USU Local Contest. March 2001
2217
569
1096
Get the Right Route Plate!
USU Local Contest. March 2001
1802
699
1097
Square Country 2
USU Local Contest. March 2001
925
1355
1098
Questions
2212
545
1099
Work Scheduling
995
1140
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