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Problem set. Volume 1
Solved problems:
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ID
Title
Source
Authors
Difficulty
1000
A+B Problem
106542
16
1001
Reverse Root
33632
14
1002
Phone Numbers
Central European Olympiad in Informatics 1999
6946
225
1003
Parity
Central European Olympiad in Informatics 1999
4052
386
1004
Sightseeing Trip
Central European Olympiad in Informatics 1999
2688
581
1005
Stone Pile
USU Championship 1997
20028
78
1006
Square Frames
USU Championship 1997
1580
985
1007
Code Words
USU Championship 1997
3876
403
1008
Image Encoding
USTU PhysTech Cup 2000
4265
366
1009
K-based Numbers
USU Championship 1997
16586
94
1010
Discrete Function
USTU PhysTech Cup 2000
5348
292
1011
Conductors
USU Championship 1997
6339
246
1012
K-based Numbers. Version 2
8701
179
1013
K-based Numbers. Version 3
1327
196
1014
Product of Digits
USU Local Contest. 1999
16684
94
1015
Test the Difference!
USU Local Contest. 1999
3426
454
1016
Cube on the Walk
USU Local Contest. 1999
1890
821
1017
Staircases
USU Local Contest. 1999
9926
157
1018
Binary Apple Tree
USU Local Contest. 1999
5569
280
1019
Line Painting
USU Local Contest. 1999
3364
463
1020
Rope
Autumn School Contest 2000
15656
100
1021
Sacrament of the Sum
Autumn School Contest 2000
10549
148
1022
Genealogical Tree
Autumn School Contest 2000
11002
142
1023
Buttons
Autumn School Contest 2000
7208
216
1024
Permutations
Autumn School Contest 2000
4870
319
1025
Democracy in Danger
Autumn School Contest 2000
23257
67
1026
Questions and Answers
Autumn School Contest 2000
9891
157
1027
D++ Again
Autumn School Contest 2000
2446
635
1028
Stars
Ural Championship 1999
5889
263
1029
Ministry
Ural Championship 1999
3809
354
1030
Titanic
Ural Championship 1999
1726
895
1031
Railway Tickets
Ural Championship 1999
3991
388
1032
Find a Multiple
Ural Championship 1999
4487
301
1033
Labyrinth
Ural Championship 1999
6568
236
1034
Queens in Peaceful Positions
Ural Championship 1999
1903
812
1035
Cross-stitch
Ural Championship 1999
1123
1369
1036
Lucky Tickets
5099
304
1037
Memory Management
USU Championship 2000
1298
1177
1038
Spell Checker
USU Championship 2000
3158
486
1039
Anniversary Party
USU Championship 2000
3992
385
1040
Airline Company
USU Championship 2000
1528
1001
1041
Nikifor
USU Championship 2000
309
4826
1042
Central Heating
USU Championship 2000
1893
809
1043
Cover an Arc
USU Championship 2000
929
1640
1044
Lucky Tickets. Easy!
USU Championship 2000
12621
122
1045
Funny Game
USU Local Contest. March 2000
2909
521
1046
Geometrical Dreams
USU Local Contest. March 2000
795
1889
1047
Simple Calculations
USU Local Contest. March 2000
5026
302
1048
Superlong Sums
USU Local Contest. March 2000
7571
200
1049
Brave Balloonists
USU Local Contest. March 2000
6109
249
1050
Preparing an Article
USU Local Contest. March 2000
1045
1441
1051
Simple Game on a Grid
USU Local Contest. March 2000
2852
531
1052
Rabbit Hunt
USU Local Contest. March 2000
6399
237
1053
Pinocchio
NEERC 2000 Central Subregional
4433
342
1054
Tower of Hanoi
NEERC 2000 Central Subregional
2358
641
1055
Combinations
NEERC 2000 Central Subregional
3598
421
1056
Centers of the Net
NEERC 2000 Central Subregional
2746
551
1057
Amount of Degrees
NEERC 2000 Central Subregional
2109
716
1058
Chocolate
NEERC 2000 Central Subregional
531
2799
1059
Expression
NEERC 2000 Central Subregional
2232
677
1060
Flip Game
NEERC 2000
3836
374
1061
Buffer Manager
NEERC 2000
2148
666
1062
Triathlon
NEERC 2000
771
1839
1063
Domino Puzzle
NEERC 2000
641
2205
1064
Binary Search
NEERC 2000
2184
655
1065
Frontier
NEERC 2000
1009
1410
1066
Garland
NEERC 2000
2476
578
1067
Disk Tree
NEERC 2000
3948
363
1068
Sum
39275
37
1069
Prufer Code
USU Personal Contest 2001
2692
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
2769
502
1073
Square Country
USU Personal Contest 2001
9897
141
1074
Very Short Problem
USU Personal Contest 2001
649
2119
1075
Thread in a Space
USU Personal Contest 2001
683
2015
1076
Trash
1942
711
1077
Travelling Tours
1258
397
1078
Segments
Winter Mathematical Festival Varna 2001
3892
354
1079
Maximum
Winter Mathematical Festival Varna 2001
12426
111
1080
Map Coloring
Winter Mathematical Festival Varna 2001
7261
190
1081
Binary Lexicographic Sequence
Winter Mathematical Festival Varna 2001
5129
269
1082
Gaby Ivanushka
Spring School Contest 2001
10894
126
1083
Factorials!!!
Spring School Contest 2001
20176
68
1084
Goat in the Garden
Spring School Contest 2001
9145
150
1085
Meeting
Spring School Contest 2001
2180
625
1086
Cryptography
Spring School Contest 2001
12906
106
1087
The Time to Take Stones
Spring School Contest 2001
4954
276
1088
Ilya Murometz
Spring School Contest 2001
1824
747
1089
Verification with the Dictionary
Spring School Contest 2001
1621
840
1090
In the Army Now
USU Local Contest. March 2001
3556
365
1091
Tmutarakan Exams
USU Local Contest. March 2001
2465
526
1092
Transversal
USU Local Contest. March 2001
549
2327
1093
Darts
USU Local Contest. March 2001
641
1999
1094
E-screen
USU Local Contest. March 2001
2817
460
1095
Nikifor 3
USU Local Contest. March 2001
2243
577
1096
Get the Right Route Plate!
USU Local Contest. March 2001
1823
710
1097
Square Country 2
USU Local Contest. March 2001
943
1365
1098
Questions
2235
554
1099
Work Scheduling
1012
1152
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