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Problem set. Volume 1
Solved problems:
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ID
Title
Source
Authors
Difficulty
1000
A+B Problem
107895
16
1001
Reverse Root
34518
14
1002
Phone Numbers
Central European Olympiad in Informatics 1999
7056
225
1003
Parity
Central European Olympiad in Informatics 1999
4136
385
1004
Sightseeing Trip
Central European Olympiad in Informatics 1999
2737
580
1005
Stone Pile
USU Championship 1997
20468
78
1006
Square Frames
USU Championship 1997
1598
990
1007
Code Words
USU Championship 1997
3916
406
1008
Image Encoding
USTU PhysTech Cup 2000
4329
367
1009
K-based Numbers
USU Championship 1997
16804
95
1010
Discrete Function
USTU PhysTech Cup 2000
5386
295
1011
Conductors
USU Championship 1997
6395
248
1012
K-based Numbers. Version 2
8783
181
1013
K-based Numbers. Version 3
1378
198
1014
Product of Digits
USU Local Contest. 1999
16882
94
1015
Test the Difference!
USU Local Contest. 1999
3457
458
1016
Cube on the Walk
USU Local Contest. 1999
1913
825
1017
Staircases
USU Local Contest. 1999
10059
158
1018
Binary Apple Tree
USU Local Contest. 1999
5628
281
1019
Line Painting
USU Local Contest. 1999
3400
466
1020
Rope
Autumn School Contest 2000
15836
100
1021
Sacrament of the Sum
Autumn School Contest 2000
10670
148
1022
Genealogical Tree
Autumn School Contest 2000
11136
142
1023
Buttons
Autumn School Contest 2000
7254
218
1024
Permutations
Autumn School Contest 2000
4903
323
1025
Democracy in Danger
Autumn School Contest 2000
23580
67
1026
Questions and Answers
Autumn School Contest 2000
10130
156
1027
D++ Again
Autumn School Contest 2000
2464
641
1028
Stars
Ural Championship 1999
5947
265
1029
Ministry
Ural Championship 1999
3857
356
1030
Titanic
Ural Championship 1999
1739
904
1031
Railway Tickets
Ural Championship 1999
4018
392
1032
Find a Multiple
Ural Championship 1999
4547
302
1033
Labyrinth
Ural Championship 1999
6655
237
1034
Queens in Peaceful Positions
Ural Championship 1999
1933
813
1035
Cross-stitch
Ural Championship 1999
1143
1368
1036
Lucky Tickets
5170
305
1037
Memory Management
USU Championship 2000
1329
1169
1038
Spell Checker
USU Championship 2000
3191
489
1039
Anniversary Party
USU Championship 2000
4040
387
1040
Airline Company
USU Championship 2000
1548
1005
1041
Nikifor
USU Championship 2000
340
4473
1042
Central Heating
USU Championship 2000
1931
807
1043
Cover an Arc
USU Championship 2000
957
1619
1044
Lucky Tickets. Easy!
USU Championship 2000
12713
123
1045
Funny Game
USU Local Contest. March 2000
2947
523
1046
Geometrical Dreams
USU Local Contest. March 2000
806
1895
1047
Simple Calculations
USU Local Contest. March 2000
5062
305
1048
Superlong Sums
USU Local Contest. March 2000
7686
201
1049
Brave Balloonists
USU Local Contest. March 2000
6209
249
1050
Preparing an Article
USU Local Contest. March 2000
1062
1443
1051
Simple Game on a Grid
USU Local Contest. March 2000
2869
537
1052
Rabbit Hunt
USU Local Contest. March 2000
6464
239
1053
Pinocchio
NEERC 2000 Central Subregional
4478
344
1054
Tower of Hanoi
NEERC 2000 Central Subregional
2392
643
1055
Combinations
NEERC 2000 Central Subregional
3628
424
1056
Centers of the Net
NEERC 2000 Central Subregional
2787
552
1057
Amount of Degrees
NEERC 2000 Central Subregional
2140
718
1058
Chocolate
NEERC 2000 Central Subregional
558
2711
1059
Expression
NEERC 2000 Central Subregional
2259
680
1060
Flip Game
NEERC 2000
3862
377
1061
Buffer Manager
NEERC 2000
2171
670
1062
Triathlon
NEERC 2000
790
1825
1063
Domino Puzzle
NEERC 2000
651
2208
1064
Binary Search
NEERC 2000
2208
659
1065
Frontier
NEERC 2000
1018
1421
1066
Garland
NEERC 2000
2495
583
1067
Disk Tree
NEERC 2000
4075
357
1068
Sum
39937
37
1069
Prufer Code
USU Personal Contest 2001
2756
513
1070
Local Time
USU Personal Contest 2001
2126
665
1071
Nikifor 2
USU Personal Contest 2001
2258
626
1072
Routing
USU Personal Contest 2001
2807
504
1073
Square Country
USU Personal Contest 2001
10099
140
1074
Very Short Problem
USU Personal Contest 2001
663
2110
1075
Thread in a Space
USU Personal Contest 2001
709
1975
1076
Trash
1970
713
1077
Travelling Tours
1281
396
1078
Segments
Winter Mathematical Festival Varna 2001
3933
356
1079
Maximum
Winter Mathematical Festival Varna 2001
12572
112
1080
Map Coloring
Winter Mathematical Festival Varna 2001
7537
186
1081
Binary Lexicographic Sequence
Winter Mathematical Festival Varna 2001
5177
271
1082
Gaby Ivanushka
Spring School Contest 2001
10943
127
1083
Factorials!!!
Spring School Contest 2001
20383
68
1084
Goat in the Garden
Spring School Contest 2001
9240
151
1085
Meeting
Spring School Contest 2001
2203
629
1086
Cryptography
Spring School Contest 2001
13024
107
1087
The Time to Take Stones
Spring School Contest 2001
5002
278
1088
Ilya Murometz
Spring School Contest 2001
1853
747
1089
Verification with the Dictionary
Spring School Contest 2001
1644
842
1090
In the Army Now
USU Local Contest. March 2001
3603
366
1091
Tmutarakan Exams
USU Local Contest. March 2001
2493
529
1092
Transversal
USU Local Contest. March 2001
564
2304
1093
Darts
USU Local Contest. March 2001
653
1995
1094
E-screen
USU Local Contest. March 2001
2830
466
1095
Nikifor 3
USU Local Contest. March 2001
2258
583
1096
Get the Right Route Plate!
USU Local Contest. March 2001
1852
710
1097
Square Country 2
USU Local Contest. March 2001
957
1368
1098
Questions
2262
556
1099
Work Scheduling
1043
1136
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