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Problem set. Volume 1
Solved problems:
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ID
Title
Source
Authors
Difficulty
1000
A+B Problem
102891
16
1001
Reverse Root
32145
14
1002
Phone Numbers
Central European Olympiad in Informatics 1999
6763
223
1003
Parity
Central European Olympiad in Informatics 1999
3933
383
1004
Sightseeing Trip
Central European Olympiad in Informatics 1999
2591
581
1005
Stone Pile
USU Championship 1997
18902
80
1006
Square Frames
USU Championship 1997
1560
961
1007
Code Words
USU Championship 1997
3817
394
1008
Image Encoding
USTU PhysTech Cup 2000
4193
359
1009
K-based Numbers
USU Championship 1997
16156
93
1010
Discrete Function
USTU PhysTech Cup 2000
5286
285
1011
Conductors
USU Championship 1997
6191
243
1012
K-based Numbers. Version 2
8533
176
1013
K-based Numbers. Version 3
1215
192
1014
Product of Digits
USU Local Contest. 1999
16060
94
1015
Test the Difference!
USU Local Contest. 1999
3373
445
1016
Cube on the Walk
USU Local Contest. 1999
1864
802
1017
Staircases
USU Local Contest. 1999
9689
155
1018
Binary Apple Tree
USU Local Contest. 1999
5457
275
1019
Line Painting
USU Local Contest. 1999
3291
456
1020
Rope
Autumn School Contest 2000
15199
99
1021
Sacrament of the Sum
Autumn School Contest 2000
10352
145
1022
Genealogical Tree
Autumn School Contest 2000
10743
140
1023
Buttons
Autumn School Contest 2000
7092
211
1024
Permutations
Autumn School Contest 2000
4791
313
1025
Democracy in Danger
Autumn School Contest 2000
22532
67
1026
Questions and Answers
Autumn School Contest 2000
9646
156
1027
D++ Again
Autumn School Contest 2000
2414
619
1028
Stars
Ural Championship 1999
5682
263
1029
Ministry
Ural Championship 1999
3736
348
1030
Titanic
Ural Championship 1999
1705
873
1031
Railway Tickets
Ural Championship 1999
3934
380
1032
Find a Multiple
Ural Championship 1999
4363
298
1033
Labyrinth
Ural Championship 1999
6439
232
1034
Queens in Peaceful Positions
Ural Championship 1999
1876
794
1035
Cross-stitch
Ural Championship 1999
1114
1329
1036
Lucky Tickets
4975
300
1037
Memory Management
USU Championship 2000
1261
1167
1038
Spell Checker
USU Championship 2000
3113
475
1039
Anniversary Party
USU Championship 2000
3896
380
1040
Airline Company
USU Championship 2000
1488
990
1041
Nikifor
USU Championship 2000
285
5028
1042
Central Heating
USU Championship 2000
1839
802
1043
Cover an Arc
USU Championship 2000
909
1614
1044
Lucky Tickets. Easy!
USU Championship 2000
12330
120
1045
Funny Game
USU Local Contest. March 2000
2834
516
1046
Geometrical Dreams
USU Local Contest. March 2000
775
1866
1047
Simple Calculations
USU Local Contest. March 2000
4987
293
1048
Superlong Sums
USU Local Contest. March 2000
7436
196
1049
Brave Balloonists
USU Local Contest. March 2000
5980
245
1050
Preparing an Article
USU Local Contest. March 2000
1024
1417
1051
Simple Game on a Grid
USU Local Contest. March 2000
2814
519
1052
Rabbit Hunt
USU Local Contest. March 2000
6295
233
1053
Pinocchio
NEERC 2000 Central Subregional
4380
333
1054
Tower of Hanoi
NEERC 2000 Central Subregional
2269
642
1055
Combinations
NEERC 2000 Central Subregional
3539
412
1056
Centers of the Net
NEERC 2000 Central Subregional
2674
545
1057
Amount of Degrees
NEERC 2000 Central Subregional
2041
713
1058
Chocolate
NEERC 2000 Central Subregional
515
2779
1059
Expression
NEERC 2000 Central Subregional
2205
660
1060
Flip Game
NEERC 2000
3776
366
1061
Buffer Manager
NEERC 2000
2120
650
1062
Triathlon
NEERC 2000
760
1797
1063
Domino Puzzle
NEERC 2000
623
2185
1064
Binary Search
NEERC 2000
2150
641
1065
Frontier
NEERC 2000
991
1383
1066
Garland
NEERC 2000
2435
566
1067
Disk Tree
NEERC 2000
3543
389
1068
Sum
37847
37
1069
Prufer Code
USU Personal Contest 2001
2595
517
1070
Local Time
USU Personal Contest 2001
2048
654
1071
Nikifor 2
USU Personal Contest 2001
2191
611
1072
Routing
USU Personal Contest 2001
2729
491
1073
Square Country
USU Personal Contest 2001
9451
142
1074
Very Short Problem
USU Personal Contest 2001
630
2103
1075
Thread in a Space
USU Personal Contest 2001
655
2024
1076
Trash
1901
700
1077
Travelling Tours
1214
396
1078
Segments
Winter Mathematical Festival Varna 2001
3824
347
1079
Maximum
Winter Mathematical Festival Varna 2001
12125
110
1080
Map Coloring
Winter Mathematical Festival Varna 2001
6660
200
1081
Binary Lexicographic Sequence
Winter Mathematical Festival Varna 2001
5046
263
1082
Gaby Ivanushka
Spring School Contest 2001
10744
123
1083
Factorials!!!
Spring School Contest 2001
19638
67
1084
Goat in the Garden
Spring School Contest 2001
8862
149
1085
Meeting
Spring School Contest 2001
2129
617
1086
Cryptography
Spring School Contest 2001
12481
106
1087
The Time to Take Stones
Spring School Contest 2001
4881
270
1088
Ilya Murometz
Spring School Contest 2001
1794
732
1089
Verification with the Dictionary
Spring School Contest 2001
1581
830
1090
In the Army Now
USU Local Contest. March 2001
3477
360
1091
Tmutarakan Exams
USU Local Contest. March 2001
2391
522
1092
Transversal
USU Local Contest. March 2001
539
2284
1093
Darts
USU Local Contest. March 2001
628
1966
1094
E-screen
USU Local Contest. March 2001
2768
451
1095
Nikifor 3
USU Local Contest. March 2001
2206
566
1096
Get the Right Route Plate!
USU Local Contest. March 2001
1784
699
1097
Square Country 2
USU Local Contest. March 2001
917
1353
1098
Questions
2199
543
1099
Work Scheduling
985
1140
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