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Problem set. Volume 1
Solved problems:
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ID
Title
Source
Authors
Difficulty
1000
A+B Problem
105980
16
1001
Reverse Root
33411
14
1002
Phone Numbers
Central European Olympiad in Informatics 1999
6909
225
1003
Parity
Central European Olympiad in Informatics 1999
4027
386
1004
Sightseeing Trip
Central European Olympiad in Informatics 1999
2669
582
1005
Stone Pile
USU Championship 1997
19920
78
1006
Square Frames
USU Championship 1997
1577
980
1007
Code Words
USU Championship 1997
3865
402
1008
Image Encoding
USTU PhysTech Cup 2000
4259
364
1009
K-based Numbers
USU Championship 1997
16524
94
1010
Discrete Function
USTU PhysTech Cup 2000
5335
291
1011
Conductors
USU Championship 1997
6294
247
1012
K-based Numbers. Version 2
8671
179
1013
K-based Numbers. Version 3
1311
195
1014
Product of Digits
USU Local Contest. 1999
16537
94
1015
Test the Difference!
USU Local Contest. 1999
3418
453
1016
Cube on the Walk
USU Local Contest. 1999
1885
818
1017
Staircases
USU Local Contest. 1999
9894
157
1018
Binary Apple Tree
USU Local Contest. 1999
5550
279
1019
Line Painting
USU Local Contest. 1999
3353
461
1020
Rope
Autumn School Contest 2000
15588
99
1021
Sacrament of the Sum
Autumn School Contest 2000
10517
147
1022
Genealogical Tree
Autumn School Contest 2000
10961
141
1023
Buttons
Autumn School Contest 2000
7186
215
1024
Permutations
Autumn School Contest 2000
4852
319
1025
Democracy in Danger
Autumn School Contest 2000
23175
67
1026
Questions and Answers
Autumn School Contest 2000
9866
157
1027
D++ Again
Autumn School Contest 2000
2443
632
1028
Stars
Ural Championship 1999
5860
263
1029
Ministry
Ural Championship 1999
3797
353
1030
Titanic
Ural Championship 1999
1719
893
1031
Railway Tickets
Ural Championship 1999
3986
386
1032
Find a Multiple
Ural Championship 1999
4462
301
1033
Labyrinth
Ural Championship 1999
6554
235
1034
Queens in Peaceful Positions
Ural Championship 1999
1899
809
1035
Cross-stitch
Ural Championship 1999
1121
1363
1036
Lucky Tickets
5088
303
1037
Memory Management
USU Championship 2000
1292
1175
1038
Spell Checker
USU Championship 2000
3153
484
1039
Anniversary Party
USU Championship 2000
3978
384
1040
Airline Company
USU Championship 2000
1519
1001
1041
Nikifor
USU Championship 2000
307
4827
1042
Central Heating
USU Championship 2000
1882
809
1043
Cover an Arc
USU Championship 2000
924
1638
1044
Lucky Tickets. Easy!
USU Championship 2000
12579
122
1045
Funny Game
USU Local Contest. March 2000
2901
520
1046
Geometrical Dreams
USU Local Contest. March 2000
790
1889
1047
Simple Calculations
USU Local Contest. March 2000
5017
301
1048
Superlong Sums
USU Local Contest. March 2000
7542
200
1049
Brave Balloonists
USU Local Contest. March 2000
6094
248
1050
Preparing an Article
USU Local Contest. March 2000
1043
1435
1051
Simple Game on a Grid
USU Local Contest. March 2000
2847
529
1052
Rabbit Hunt
USU Local Contest. March 2000
6380
237
1053
Pinocchio
NEERC 2000 Central Subregional
4426
340
1054
Tower of Hanoi
NEERC 2000 Central Subregional
2349
639
1055
Combinations
NEERC 2000 Central Subregional
3591
419
1056
Centers of the Net
NEERC 2000 Central Subregional
2738
549
1057
Amount of Degrees
NEERC 2000 Central Subregional
2102
714
1058
Chocolate
NEERC 2000 Central Subregional
527
2803
1059
Expression
NEERC 2000 Central Subregional
2228
674
1060
Flip Game
NEERC 2000
3824
373
1061
Buffer Manager
NEERC 2000
2144
663
1062
Triathlon
NEERC 2000
770
1830
1063
Domino Puzzle
NEERC 2000
634
2215
1064
Binary Search
NEERC 2000
2181
652
1065
Frontier
NEERC 2000
1005
1407
1066
Garland
NEERC 2000
2470
575
1067
Disk Tree
NEERC 2000
3935
362
1068
Sum
38997
37
1069
Prufer Code
USU Personal Contest 2001
2684
515
1070
Local Time
USU Personal Contest 2001
2099
658
1071
Nikifor 2
USU Personal Contest 2001
2224
621
1072
Routing
USU Personal Contest 2001
2763
500
1073
Square Country
USU Personal Contest 2001
9869
140
1074
Very Short Problem
USU Personal Contest 2001
648
2109
1075
Thread in a Space
USU Personal Contest 2001
681
2009
1076
Trash
1938
709
1077
Travelling Tours
1252
396
1078
Segments
Winter Mathematical Festival Varna 2001
3882
353
1079
Maximum
Winter Mathematical Festival Varna 2001
12383
111
1080
Map Coloring
Winter Mathematical Festival Varna 2001
7229
190
1081
Binary Lexicographic Sequence
Winter Mathematical Festival Varna 2001
5110
268
1082
Gaby Ivanushka
Spring School Contest 2001
10873
125
1083
Factorials!!!
Spring School Contest 2001
20111
68
1084
Goat in the Garden
Spring School Contest 2001
9072
150
1085
Meeting
Spring School Contest 2001
2174
623
1086
Cryptography
Spring School Contest 2001
12833
106
1087
The Time to Take Stones
Spring School Contest 2001
4943
275
1088
Ilya Murometz
Spring School Contest 2001
1816
745
1089
Verification with the Dictionary
Spring School Contest 2001
1615
838
1090
In the Army Now
USU Local Contest. March 2001
3543
364
1091
Tmutarakan Exams
USU Local Contest. March 2001
2454
525
1092
Transversal
USU Local Contest. March 2001
548
2317
1093
Darts
USU Local Contest. March 2001
639
1993
1094
E-screen
USU Local Contest. March 2001
2812
458
1095
Nikifor 3
USU Local Contest. March 2001
2236
576
1096
Get the Right Route Plate!
USU Local Contest. March 2001
1820
707
1097
Square Country 2
USU Local Contest. March 2001
940
1361
1098
Questions
2228
552
1099
Work Scheduling
1009
1148
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