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Problem set. Volume 1
Solved problems:
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ID
Title
Source
Authors
Difficulty
1000
A+B Problem
106153
16
1001
Reverse Root
33498
14
1002
Phone Numbers
Central European Olympiad in Informatics 1999
6925
225
1003
Parity
Central European Olympiad in Informatics 1999
4039
386
1004
Sightseeing Trip
Central European Olympiad in Informatics 1999
2676
582
1005
Stone Pile
USU Championship 1997
19958
78
1006
Square Frames
USU Championship 1997
1577
983
1007
Code Words
USU Championship 1997
3871
402
1008
Image Encoding
USTU PhysTech Cup 2000
4261
365
1009
K-based Numbers
USU Championship 1997
16554
94
1010
Discrete Function
USTU PhysTech Cup 2000
5342
291
1011
Conductors
USU Championship 1997
6304
247
1012
K-based Numbers. Version 2
8687
179
1013
K-based Numbers. Version 3
1317
196
1014
Product of Digits
USU Local Contest. 1999
16568
94
1015
Test the Difference!
USU Local Contest. 1999
3423
453
1016
Cube on the Walk
USU Local Contest. 1999
1889
819
1017
Staircases
USU Local Contest. 1999
9910
157
1018
Binary Apple Tree
USU Local Contest. 1999
5562
279
1019
Line Painting
USU Local Contest. 1999
3357
462
1020
Rope
Autumn School Contest 2000
15610
100
1021
Sacrament of the Sum
Autumn School Contest 2000
10532
147
1022
Genealogical Tree
Autumn School Contest 2000
10979
141
1023
Buttons
Autumn School Contest 2000
7194
216
1024
Permutations
Autumn School Contest 2000
4863
319
1025
Democracy in Danger
Autumn School Contest 2000
23206
67
1026
Questions and Answers
Autumn School Contest 2000
9878
157
1027
D++ Again
Autumn School Contest 2000
2444
633
1028
Stars
Ural Championship 1999
5879
263
1029
Ministry
Ural Championship 1999
3807
353
1030
Titanic
Ural Championship 1999
1722
894
1031
Railway Tickets
Ural Championship 1999
3988
387
1032
Find a Multiple
Ural Championship 1999
4477
300
1033
Labyrinth
Ural Championship 1999
6561
236
1034
Queens in Peaceful Positions
Ural Championship 1999
1901
810
1035
Cross-stitch
Ural Championship 1999
1121
1366
1036
Lucky Tickets
5094
303
1037
Memory Management
USU Championship 2000
1294
1177
1038
Spell Checker
USU Championship 2000
3156
485
1039
Anniversary Party
USU Championship 2000
3988
384
1040
Airline Company
USU Championship 2000
1523
1001
1041
Nikifor
USU Championship 2000
309
4810
1042
Central Heating
USU Championship 2000
1888
808
1043
Cover an Arc
USU Championship 2000
925
1641
1044
Lucky Tickets. Easy!
USU Championship 2000
12596
122
1045
Funny Game
USU Local Contest. March 2000
2906
520
1046
Geometrical Dreams
USU Local Contest. March 2000
791
1892
1047
Simple Calculations
USU Local Contest. March 2000
5021
301
1048
Superlong Sums
USU Local Contest. March 2000
7556
200
1049
Brave Balloonists
USU Local Contest. March 2000
6102
248
1050
Preparing an Article
USU Local Contest. March 2000
1044
1438
1051
Simple Game on a Grid
USU Local Contest. March 2000
2849
530
1052
Rabbit Hunt
USU Local Contest. March 2000
6390
237
1053
Pinocchio
NEERC 2000 Central Subregional
4431
341
1054
Tower of Hanoi
NEERC 2000 Central Subregional
2353
640
1055
Combinations
NEERC 2000 Central Subregional
3594
420
1056
Centers of the Net
NEERC 2000 Central Subregional
2742
550
1057
Amount of Degrees
NEERC 2000 Central Subregional
2108
714
1058
Chocolate
NEERC 2000 Central Subregional
527
2811
1059
Expression
NEERC 2000 Central Subregional
2231
675
1060
Flip Game
NEERC 2000
3827
373
1061
Buffer Manager
NEERC 2000
2147
664
1062
Triathlon
NEERC 2000
771
1833
1063
Domino Puzzle
NEERC 2000
635
2218
1064
Binary Search
NEERC 2000
2183
653
1065
Frontier
NEERC 2000
1007
1408
1066
Garland
NEERC 2000
2472
577
1067
Disk Tree
NEERC 2000
3938
362
1068
Sum
39049
37
1069
Prufer Code
USU Personal Contest 2001
2688
516
1070
Local Time
USU Personal Contest 2001
2104
658
1071
Nikifor 2
USU Personal Contest 2001
2226
622
1072
Routing
USU Personal Contest 2001
2765
502
1073
Square Country
USU Personal Contest 2001
9888
141
1074
Very Short Problem
USU Personal Contest 2001
649
2112
1075
Thread in a Space
USU Personal Contest 2001
682
2011
1076
Trash
1940
710
1077
Travelling Tours
1256
396
1078
Segments
Winter Mathematical Festival Varna 2001
3887
353
1079
Maximum
Winter Mathematical Festival Varna 2001
12402
111
1080
Map Coloring
Winter Mathematical Festival Varna 2001
7239
190
1081
Binary Lexicographic Sequence
Winter Mathematical Festival Varna 2001
5122
268
1082
Gaby Ivanushka
Spring School Contest 2001
10883
125
1083
Factorials!!!
Spring School Contest 2001
20143
68
1084
Goat in the Garden
Spring School Contest 2001
9095
150
1085
Meeting
Spring School Contest 2001
2177
624
1086
Cryptography
Spring School Contest 2001
12850
106
1087
The Time to Take Stones
Spring School Contest 2001
4948
275
1088
Ilya Murometz
Spring School Contest 2001
1822
745
1089
Verification with the Dictionary
Spring School Contest 2001
1621
837
1090
In the Army Now
USU Local Contest. March 2001
3550
364
1091
Tmutarakan Exams
USU Local Contest. March 2001
2460
525
1092
Transversal
USU Local Contest. March 2001
549
2320
1093
Darts
USU Local Contest. March 2001
640
1995
1094
E-screen
USU Local Contest. March 2001
2816
459
1095
Nikifor 3
USU Local Contest. March 2001
2239
577
1096
Get the Right Route Plate!
USU Local Contest. March 2001
1822
708
1097
Square Country 2
USU Local Contest. March 2001
942
1362
1098
Questions
2232
553
1099
Work Scheduling
1010
1150
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