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Problem set. Volume 1
Solved problems:
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ID
Title
Source
Authors
Difficulty
1000
A+B Problem
106631
16
1001
Reverse Root
33659
14
1002
Phone Numbers
Central European Olympiad in Informatics 1999
6951
225
1003
Parity
Central European Olympiad in Informatics 1999
4056
386
1004
Sightseeing Trip
Central European Olympiad in Informatics 1999
2690
581
1005
Stone Pile
USU Championship 1997
20040
78
1006
Square Frames
USU Championship 1997
1581
985
1007
Code Words
USU Championship 1997
3877
403
1008
Image Encoding
USTU PhysTech Cup 2000
4265
366
1009
K-based Numbers
USU Championship 1997
16591
94
1010
Discrete Function
USTU PhysTech Cup 2000
5349
292
1011
Conductors
USU Championship 1997
6344
246
1012
K-based Numbers. Version 2
8703
179
1013
K-based Numbers. Version 3
1328
196
1014
Product of Digits
USU Local Contest. 1999
16687
94
1015
Test the Difference!
USU Local Contest. 1999
3426
455
1016
Cube on the Walk
USU Local Contest. 1999
1890
822
1017
Staircases
USU Local Contest. 1999
9931
157
1018
Binary Apple Tree
USU Local Contest. 1999
5572
280
1019
Line Painting
USU Local Contest. 1999
3364
463
1020
Rope
Autumn School Contest 2000
15660
100
1021
Sacrament of the Sum
Autumn School Contest 2000
10551
148
1022
Genealogical Tree
Autumn School Contest 2000
11005
142
1023
Buttons
Autumn School Contest 2000
7211
216
1024
Permutations
Autumn School Contest 2000
4873
319
1025
Democracy in Danger
Autumn School Contest 2000
23341
67
1026
Questions and Answers
Autumn School Contest 2000
10032
155
1027
D++ Again
Autumn School Contest 2000
2446
635
1028
Stars
Ural Championship 1999
5892
264
1029
Ministry
Ural Championship 1999
3810
354
1030
Titanic
Ural Championship 1999
1726
896
1031
Railway Tickets
Ural Championship 1999
3992
389
1032
Find a Multiple
Ural Championship 1999
4490
301
1033
Labyrinth
Ural Championship 1999
6572
236
1034
Queens in Peaceful Positions
Ural Championship 1999
1903
813
1035
Cross-stitch
Ural Championship 1999
1123
1370
1036
Lucky Tickets
5102
304
1037
Memory Management
USU Championship 2000
1299
1177
1038
Spell Checker
USU Championship 2000
3159
486
1039
Anniversary Party
USU Championship 2000
3992
385
1040
Airline Company
USU Championship 2000
1529
1001
1041
Nikifor
USU Championship 2000
309
4830
1042
Central Heating
USU Championship 2000
1893
810
1043
Cover an Arc
USU Championship 2000
930
1639
1044
Lucky Tickets. Easy!
USU Championship 2000
12623
122
1045
Funny Game
USU Local Contest. March 2000
2910
522
1046
Geometrical Dreams
USU Local Contest. March 2000
796
1888
1047
Simple Calculations
USU Local Contest. March 2000
5027
302
1048
Superlong Sums
USU Local Contest. March 2000
7599
200
1049
Brave Balloonists
USU Local Contest. March 2000
6111
249
1050
Preparing an Article
USU Local Contest. March 2000
1045
1443
1051
Simple Game on a Grid
USU Local Contest. March 2000
2852
532
1052
Rabbit Hunt
USU Local Contest. March 2000
6405
237
1053
Pinocchio
NEERC 2000 Central Subregional
4434
342
1054
Tower of Hanoi
NEERC 2000 Central Subregional
2358
641
1055
Combinations
NEERC 2000 Central Subregional
3599
421
1056
Centers of the Net
NEERC 2000 Central Subregional
2748
551
1057
Amount of Degrees
NEERC 2000 Central Subregional
2109
717
1058
Chocolate
NEERC 2000 Central Subregional
531
2801
1059
Expression
NEERC 2000 Central Subregional
2233
677
1060
Flip Game
NEERC 2000
3837
374
1061
Buffer Manager
NEERC 2000
2149
666
1062
Triathlon
NEERC 2000
771
1840
1063
Domino Puzzle
NEERC 2000
641
2207
1064
Binary Search
NEERC 2000
2184
656
1065
Frontier
NEERC 2000
1009
1411
1066
Garland
NEERC 2000
2478
578
1067
Disk Tree
NEERC 2000
3949
363
1068
Sum
39299
37
1069
Prufer Code
USU Personal Contest 2001
2693
517
1070
Local Time
USU Personal Contest 2001
2106
660
1071
Nikifor 2
USU Personal Contest 2001
2228
624
1072
Routing
USU Personal Contest 2001
2772
502
1073
Square Country
USU Personal Contest 2001
9960
140
1074
Very Short Problem
USU Personal Contest 2001
649
2120
1075
Thread in a Space
USU Personal Contest 2001
684
2014
1076
Trash
1942
712
1077
Travelling Tours
1264
395
1078
Segments
Winter Mathematical Festival Varna 2001
3894
354
1079
Maximum
Winter Mathematical Festival Varna 2001
12433
111
1080
Map Coloring
Winter Mathematical Festival Varna 2001
7264
190
1081
Binary Lexicographic Sequence
Winter Mathematical Festival Varna 2001
5130
269
1082
Gaby Ivanushka
Spring School Contest 2001
10896
126
1083
Factorials!!!
Spring School Contest 2001
20187
68
1084
Goat in the Garden
Spring School Contest 2001
9151
150
1085
Meeting
Spring School Contest 2001
2180
626
1086
Cryptography
Spring School Contest 2001
12912
106
1087
The Time to Take Stones
Spring School Contest 2001
4955
276
1088
Ilya Murometz
Spring School Contest 2001
1824
747
1089
Verification with the Dictionary
Spring School Contest 2001
1622
840
1090
In the Army Now
USU Local Contest. March 2001
3557
365
1091
Tmutarakan Exams
USU Local Contest. March 2001
2467
526
1092
Transversal
USU Local Contest. March 2001
549
2329
1093
Darts
USU Local Contest. March 2001
641
2000
1094
E-screen
USU Local Contest. March 2001
2817
461
1095
Nikifor 3
USU Local Contest. March 2001
2244
578
1096
Get the Right Route Plate!
USU Local Contest. March 2001
1823
710
1097
Square Country 2
USU Local Contest. March 2001
943
1366
1098
Questions
2235
554
1099
Work Scheduling
1012
1153
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