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Problem set. Volume 1
Solved problems:
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ID
Title
Source
Authors
Difficulty
1000
A+B Problem
102862
16
1001
Reverse Root
32133
14
1002
Phone Numbers
Central European Olympiad in Informatics 1999
6760
223
1003
Parity
Central European Olympiad in Informatics 1999
3929
383
1004
Sightseeing Trip
Central European Olympiad in Informatics 1999
2589
581
1005
Stone Pile
USU Championship 1997
18898
80
1006
Square Frames
USU Championship 1997
1558
962
1007
Code Words
USU Championship 1997
3815
394
1008
Image Encoding
USTU PhysTech Cup 2000
4192
359
1009
K-based Numbers
USU Championship 1997
16150
93
1010
Discrete Function
USTU PhysTech Cup 2000
5285
285
1011
Conductors
USU Championship 1997
6176
244
1012
K-based Numbers. Version 2
8530
176
1013
K-based Numbers. Version 3
1213
192
1014
Product of Digits
USU Local Contest. 1999
16054
94
1015
Test the Difference!
USU Local Contest. 1999
3372
445
1016
Cube on the Walk
USU Local Contest. 1999
1863
802
1017
Staircases
USU Local Contest. 1999
9686
155
1018
Binary Apple Tree
USU Local Contest. 1999
5456
275
1019
Line Painting
USU Local Contest. 1999
3290
456
1020
Rope
Autumn School Contest 2000
15196
99
1021
Sacrament of the Sum
Autumn School Contest 2000
10340
145
1022
Genealogical Tree
Autumn School Contest 2000
10740
140
1023
Buttons
Autumn School Contest 2000
7091
211
1024
Permutations
Autumn School Contest 2000
4790
313
1025
Democracy in Danger
Autumn School Contest 2000
22528
67
1026
Questions and Answers
Autumn School Contest 2000
9643
156
1027
D++ Again
Autumn School Contest 2000
2413
620
1028
Stars
Ural Championship 1999
5671
263
1029
Ministry
Ural Championship 1999
3735
348
1030
Titanic
Ural Championship 1999
1704
873
1031
Railway Tickets
Ural Championship 1999
3932
380
1032
Find a Multiple
Ural Championship 1999
4360
298
1033
Labyrinth
Ural Championship 1999
6437
232
1034
Queens in Peaceful Positions
Ural Championship 1999
1875
794
1035
Cross-stitch
Ural Championship 1999
1112
1331
1036
Lucky Tickets
4974
300
1037
Memory Management
USU Championship 2000
1259
1169
1038
Spell Checker
USU Championship 2000
3112
475
1039
Anniversary Party
USU Championship 2000
3894
380
1040
Airline Company
USU Championship 2000
1486
991
1041
Nikifor
USU Championship 2000
284
5044
1042
Central Heating
USU Championship 2000
1838
802
1043
Cover an Arc
USU Championship 2000
907
1617
1044
Lucky Tickets. Easy!
USU Championship 2000
12327
120
1045
Funny Game
USU Local Contest. March 2000
2833
516
1046
Geometrical Dreams
USU Local Contest. March 2000
773
1871
1047
Simple Calculations
USU Local Contest. March 2000
4984
293
1048
Superlong Sums
USU Local Contest. March 2000
7434
196
1049
Brave Balloonists
USU Local Contest. March 2000
5977
245
1050
Preparing an Article
USU Local Contest. March 2000
1023
1418
1051
Simple Game on a Grid
USU Local Contest. March 2000
2813
519
1052
Rabbit Hunt
USU Local Contest. March 2000
6293
233
1053
Pinocchio
NEERC 2000 Central Subregional
4379
333
1054
Tower of Hanoi
NEERC 2000 Central Subregional
2268
642
1055
Combinations
NEERC 2000 Central Subregional
3537
412
1056
Centers of the Net
NEERC 2000 Central Subregional
2673
545
1057
Amount of Degrees
NEERC 2000 Central Subregional
2040
713
1058
Chocolate
NEERC 2000 Central Subregional
514
2783
1059
Expression
NEERC 2000 Central Subregional
2203
661
1060
Flip Game
NEERC 2000
3774
366
1061
Buffer Manager
NEERC 2000
2119
650
1062
Triathlon
NEERC 2000
759
1799
1063
Domino Puzzle
NEERC 2000
622
2188
1064
Binary Search
NEERC 2000
2148
642
1065
Frontier
NEERC 2000
990
1384
1066
Garland
NEERC 2000
2434
566
1067
Disk Tree
NEERC 2000
3541
389
1068
Sum
37838
37
1069
Prufer Code
USU Personal Contest 2001
2593
517
1070
Local Time
USU Personal Contest 2001
2047
654
1071
Nikifor 2
USU Personal Contest 2001
2189
612
1072
Routing
USU Personal Contest 2001
2728
491
1073
Square Country
USU Personal Contest 2001
9401
143
1074
Very Short Problem
USU Personal Contest 2001
629
2105
1075
Thread in a Space
USU Personal Contest 2001
654
2026
1076
Trash
1900
700
1077
Travelling Tours
1213
396
1078
Segments
Winter Mathematical Festival Varna 2001
3823
347
1079
Maximum
Winter Mathematical Festival Varna 2001
12120
110
1080
Map Coloring
Winter Mathematical Festival Varna 2001
6658
200
1081
Binary Lexicographic Sequence
Winter Mathematical Festival Varna 2001
5044
263
1082
Gaby Ivanushka
Spring School Contest 2001
10741
123
1083
Factorials!!!
Spring School Contest 2001
19632
67
1084
Goat in the Garden
Spring School Contest 2001
8860
149
1085
Meeting
Spring School Contest 2001
2128
617
1086
Cryptography
Spring School Contest 2001
12476
106
1087
The Time to Take Stones
Spring School Contest 2001
4879
270
1088
Ilya Murometz
Spring School Contest 2001
1793
732
1089
Verification with the Dictionary
Spring School Contest 2001
1579
830
1090
In the Army Now
USU Local Contest. March 2001
3475
360
1091
Tmutarakan Exams
USU Local Contest. March 2001
2390
522
1092
Transversal
USU Local Contest. March 2001
538
2288
1093
Darts
USU Local Contest. March 2001
627
1968
1094
E-screen
USU Local Contest. March 2001
2767
451
1095
Nikifor 3
USU Local Contest. March 2001
2204
566
1096
Get the Right Route Plate!
USU Local Contest. March 2001
1783
699
1097
Square Country 2
USU Local Contest. March 2001
916
1354
1098
Questions
2198
543
1099
Work Scheduling
984
1141
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