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Problem set. Volume 1
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ID
Title
Source
Authors
Difficulty
1000
A+B Problem
107348
16
1001
Reverse Root
34323
14
1002
Phone Numbers
Central European Olympiad in Informatics 1999
7022
225
1003
Parity
Central European Olympiad in Informatics 1999
4113
384
1004
Sightseeing Trip
Central European Olympiad in Informatics 1999
2724
580
1005
Stone Pile
USU Championship 1997
20395
78
1006
Square Frames
USU Championship 1997
1591
988
1007
Code Words
USU Championship 1997
3907
404
1008
Image Encoding
USTU PhysTech Cup 2000
4315
366
1009
K-based Numbers
USU Championship 1997
16744
94
1010
Discrete Function
USTU PhysTech Cup 2000
5370
294
1011
Conductors
USU Championship 1997
6372
248
1012
K-based Numbers. Version 2
8752
180
1013
K-based Numbers. Version 3
1366
196
1014
Product of Digits
USU Local Contest. 1999
16811
94
1015
Test the Difference!
USU Local Contest. 1999
3448
456
1016
Cube on the Walk
USU Local Contest. 1999
1905
823
1017
Staircases
USU Local Contest. 1999
10016
157
1018
Binary Apple Tree
USU Local Contest. 1999
5608
281
1019
Line Painting
USU Local Contest. 1999
3388
464
1020
Rope
Autumn School Contest 2000
15770
100
1021
Sacrament of the Sum
Autumn School Contest 2000
10641
148
1022
Genealogical Tree
Autumn School Contest 2000
11102
142
1023
Buttons
Autumn School Contest 2000
7234
217
1024
Permutations
Autumn School Contest 2000
4889
322
1025
Democracy in Danger
Autumn School Contest 2000
23513
67
1026
Questions and Answers
Autumn School Contest 2000
10104
156
1027
D++ Again
Autumn School Contest 2000
2457
639
1028
Stars
Ural Championship 1999
5923
265
1029
Ministry
Ural Championship 1999
3842
355
1030
Titanic
Ural Championship 1999
1735
900
1031
Railway Tickets
Ural Championship 1999
4004
391
1032
Find a Multiple
Ural Championship 1999
4530
301
1033
Labyrinth
Ural Championship 1999
6631
237
1034
Queens in Peaceful Positions
Ural Championship 1999
1926
811
1035
Cross-stitch
Ural Championship 1999
1135
1369
1036
Lucky Tickets
5144
305
1037
Memory Management
USU Championship 2000
1323
1167
1038
Spell Checker
USU Championship 2000
3181
488
1039
Anniversary Party
USU Championship 2000
4024
386
1040
Airline Company
USU Championship 2000
1544
1001
1041
Nikifor
USU Championship 2000
330
4577
1042
Central Heating
USU Championship 2000
1922
805
1043
Cover an Arc
USU Championship 2000
952
1617
1044
Lucky Tickets. Easy!
USU Championship 2000
12680
123
1045
Funny Game
USU Local Contest. March 2000
2938
522
1046
Geometrical Dreams
USU Local Contest. March 2000
803
1890
1047
Simple Calculations
USU Local Contest. March 2000
5049
304
1048
Superlong Sums
USU Local Contest. March 2000
7641
200
1049
Brave Balloonists
USU Local Contest. March 2000
6165
249
1050
Preparing an Article
USU Local Contest. March 2000
1057
1441
1051
Simple Game on a Grid
USU Local Contest. March 2000
2861
535
1052
Rabbit Hunt
USU Local Contest. March 2000
6443
238
1053
Pinocchio
NEERC 2000 Central Subregional
4462
343
1054
Tower of Hanoi
NEERC 2000 Central Subregional
2382
641
1055
Combinations
NEERC 2000 Central Subregional
3616
423
1056
Centers of the Net
NEERC 2000 Central Subregional
2775
551
1057
Amount of Degrees
NEERC 2000 Central Subregional
2131
717
1058
Chocolate
NEERC 2000 Central Subregional
549
2738
1059
Expression
NEERC 2000 Central Subregional
2254
678
1060
Flip Game
NEERC 2000
3854
376
1061
Buffer Manager
NEERC 2000
2166
667
1062
Triathlon
NEERC 2000
786
1823
1063
Domino Puzzle
NEERC 2000
648
2205
1064
Binary Search
NEERC 2000
2201
657
1065
Frontier
NEERC 2000
1016
1415
1066
Garland
NEERC 2000
2486
581
1067
Disk Tree
NEERC 2000
4051
357
1068
Sum
39622
37
1069
Prufer Code
USU Personal Contest 2001
2745
512
1070
Local Time
USU Personal Contest 2001
2121
662
1071
Nikifor 2
USU Personal Contest 2001
2251
624
1072
Routing
USU Personal Contest 2001
2800
502
1073
Square Country
USU Personal Contest 2001
10042
140
1074
Very Short Problem
USU Personal Contest 2001
660
2106
1075
Thread in a Space
USU Personal Contest 2001
705
1974
1076
Trash
1964
711
1077
Travelling Tours
1275
395
1078
Segments
Winter Mathematical Festival Varna 2001
3922
355
1079
Maximum
Winter Mathematical Festival Varna 2001
12532
111
1080
Map Coloring
Winter Mathematical Festival Varna 2001
7493
186
1081
Binary Lexicographic Sequence
Winter Mathematical Festival Varna 2001
5164
270
1082
Gaby Ivanushka
Spring School Contest 2001
10919
127
1083
Factorials!!!
Spring School Contest 2001
20329
68
1084
Goat in the Garden
Spring School Contest 2001
9188
150
1085
Meeting
Spring School Contest 2001
2196
627
1086
Cryptography
Spring School Contest 2001
12984
107
1087
The Time to Take Stones
Spring School Contest 2001
4989
277
1088
Ilya Murometz
Spring School Contest 2001
1833
751
1089
Verification with the Dictionary
Spring School Contest 2001
1637
840
1090
In the Army Now
USU Local Contest. March 2001
3593
365
1091
Tmutarakan Exams
USU Local Contest. March 2001
2487
527
1092
Transversal
USU Local Contest. March 2001
558
2315
1093
Darts
USU Local Contest. March 2001
649
1995
1094
E-screen
USU Local Contest. March 2001
2823
464
1095
Nikifor 3
USU Local Contest. March 2001
2251
582
1096
Get the Right Route Plate!
USU Local Contest. March 2001
1848
708
1097
Square Country 2
USU Local Contest. March 2001
954
1364
1098
Questions
2254
555
1099
Work Scheduling
1031
1143
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