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Problem set. Volume 1
Solved problems:
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ID
Title
Source
Authors
Difficulty
1000
A+B Problem
101356
16
1001
Reverse Root
31581
14
1002
Phone Numbers
Central European Olympiad in Informatics 1999
6710
222
1003
Parity
Central European Olympiad in Informatics 1999
3899
382
1004
Sightseeing Trip
Central European Olympiad in Informatics 1999
2568
580
1005
Stone Pile
USU Championship 1997
18670
80
1006
Square Frames
USU Championship 1997
1553
955
1007
Code Words
USU Championship 1997
3790
393
1008
Image Encoding
USTU PhysTech Cup 2000
4174
357
1009
K-based Numbers
USU Championship 1997
16026
93
1010
Discrete Function
USTU PhysTech Cup 2000
5261
283
1011
Conductors
USU Championship 1997
6122
243
1012
K-based Numbers. Version 2
8480
175
1013
K-based Numbers. Version 3
1187
190
1014
Product of Digits
USU Local Contest. 1999
15815
94
1015
Test the Difference!
USU Local Contest. 1999
3356
442
1016
Cube on the Walk
USU Local Contest. 1999
1853
798
1017
Staircases
USU Local Contest. 1999
9620
154
1018
Binary Apple Tree
USU Local Contest. 1999
5410
274
1019
Line Painting
USU Local Contest. 1999
3277
453
1020
Rope
Autumn School Contest 2000
14999
99
1021
Sacrament of the Sum
Autumn School Contest 2000
10249
145
1022
Genealogical Tree
Autumn School Contest 2000
10692
139
1023
Buttons
Autumn School Contest 2000
7054
210
1024
Permutations
Autumn School Contest 2000
4764
311
1025
Democracy in Danger
Autumn School Contest 2000
22232
67
1026
Questions and Answers
Autumn School Contest 2000
9518
156
1027
D++ Again
Autumn School Contest 2000
2405
615
1028
Stars
Ural Championship 1999
5617
263
1029
Ministry
Ural Championship 1999
3718
346
1030
Titanic
Ural Championship 1999
1697
868
1031
Railway Tickets
Ural Championship 1999
3902
379
1032
Find a Multiple
Ural Championship 1999
4333
297
1033
Labyrinth
Ural Championship 1999
6408
231
1034
Queens in Peaceful Positions
Ural Championship 1999
1870
788
1035
Cross-stitch
Ural Championship 1999
1111
1318
1036
Lucky Tickets
4943
299
1037
Memory Management
USU Championship 2000
1253
1162
1038
Spell Checker
USU Championship 2000
3103
471
1039
Anniversary Party
USU Championship 2000
3863
379
1040
Airline Company
USU Championship 2000
1480
985
1041
Nikifor
USU Championship 2000
277
5113
1042
Central Heating
USU Championship 2000
1825
800
1043
Cover an Arc
USU Championship 2000
902
1609
1044
Lucky Tickets. Easy!
USU Championship 2000
12212
120
1045
Funny Game
USU Local Contest. March 2000
2808
515
1046
Geometrical Dreams
USU Local Contest. March 2000
769
1861
1047
Simple Calculations
USU Local Contest. March 2000
4965
292
1048
Superlong Sums
USU Local Contest. March 2000
7371
196
1049
Brave Balloonists
USU Local Contest. March 2000
5941
244
1050
Preparing an Article
USU Local Contest. March 2000
1021
1406
1051
Simple Game on a Grid
USU Local Contest. March 2000
2799
516
1052
Rabbit Hunt
USU Local Contest. March 2000
6249
232
1053
Pinocchio
NEERC 2000 Central Subregional
4357
331
1054
Tower of Hanoi
NEERC 2000 Central Subregional
2242
642
1055
Combinations
NEERC 2000 Central Subregional
3517
410
1056
Centers of the Net
NEERC 2000 Central Subregional
2655
543
1057
Amount of Degrees
NEERC 2000 Central Subregional
2028
710
1058
Chocolate
NEERC 2000 Central Subregional
510
2776
1059
Expression
NEERC 2000 Central Subregional
2192
657
1060
Flip Game
NEERC 2000
3756
364
1061
Buffer Manager
NEERC 2000
2108
647
1062
Triathlon
NEERC 2000
753
1794
1063
Domino Puzzle
NEERC 2000
619
2176
1064
Binary Search
NEERC 2000
2140
637
1065
Frontier
NEERC 2000
986
1375
1066
Garland
NEERC 2000
2423
563
1067
Disk Tree
NEERC 2000
3472
393
1068
Sum
37174
37
1069
Prufer Code
USU Personal Contest 2001
2574
515
1070
Local Time
USU Personal Contest 2001
2038
650
1071
Nikifor 2
USU Personal Contest 2001
2181
608
1072
Routing
USU Personal Contest 2001
2716
488
1073
Square Country
USU Personal Contest 2001
9294
143
1074
Very Short Problem
USU Personal Contest 2001
627
2090
1075
Thread in a Space
USU Personal Contest 2001
648
2023
1076
Trash
1895
695
1077
Travelling Tours
1195
398
1078
Segments
Winter Mathematical Festival Varna 2001
3800
346
1079
Maximum
Winter Mathematical Festival Varna 2001
12025
109
1080
Map Coloring
Winter Mathematical Festival Varna 2001
6548
201
1081
Binary Lexicographic Sequence
Winter Mathematical Festival Varna 2001
5018
262
1082
Gaby Ivanushka
Spring School Contest 2001
10693
122
1083
Factorials!!!
Spring School Contest 2001
19407
67
1084
Goat in the Garden
Spring School Contest 2001
8779
149
1085
Meeting
Spring School Contest 2001
2117
614
1086
Cryptography
Spring School Contest 2001
12353
106
1087
The Time to Take Stones
Spring School Contest 2001
4855
268
1088
Ilya Murometz
Spring School Contest 2001
1785
727
1089
Verification with the Dictionary
Spring School Contest 2001
1567
828
1090
In the Army Now
USU Local Contest. March 2001
3570
347
1091
Tmutarakan Exams
USU Local Contest. March 2001
2376
520
1092
Transversal
USU Local Contest. March 2001
535
2277
1093
Darts
USU Local Contest. March 2001
624
1957
1094
E-screen
USU Local Contest. March 2001
2753
449
1095
Nikifor 3
USU Local Contest. March 2001
2196
562
1096
Get the Right Route Plate!
USU Local Contest. March 2001
1768
698
1097
Square Country 2
USU Local Contest. March 2001
912
1346
1098
Questions
2183
541
1099
Work Scheduling
970
1145
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