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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
09:46:00
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Difficulty:
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combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
constructive algorithms
data structures
dfs and similar
divide and conquer
dp
dsu
expression parsing
fft
flows
games
geometry
graph matchings
graphs
greedy
hashing
implementation
interactive
math
matrices
meet-in-the-middle
number theory
probabilities
schedules
shortest paths
sortings
string suffix structures
strings
ternary search
trees
two pointers
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Status
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Custom test
Problems
#
Name
100D
World of Mouth
*special problem
,
strings
1500
x306
100C
A+B
*special problem
,
implementation
1400
x537
100B
Friendly Numbers
*special problem
,
implementation
1500
x546
98A
Help Victoria the Wise
brute force
,
implementation
1700
x1216
95B
Lucky Numbers
dp
,
greedy
1800
x1225
95A
Hockey
implementation
,
strings
1600
x1681
93A
Frames
implementation
1700
x1966
91B
Queue
binary search
,
data structures
1500
x6862
91A
Newspaper Headline
greedy
,
strings
1500
x3609
89A
Robbery
greedy
1800
x1483
88B
Keyboard
implementation
1500
x4718
87B
Vasya and Types
implementation
,
strings
1800
x1155
87A
Trains
implementation
,
math
1500
x5410
86A
Reflection
math
1600
x1392
85B
Embassy Queue
data structures
,
greedy
1800
x982
84C
Biathlon
binary search
,
implementation
1700
x1709
83B
Doctor
binary search
,
math
,
sortings
1800
x1703
82B
Sets
constructive algorithms
,
hashing
,
implementation
1700
x2062
81C
Average Score
greedy
,
math
,
sortings
1700
x1672
81B
Sequence Formatting
implementation
,
strings
1700
x1957
81A
Plug-in
implementation
1400
x11059
79C
Beaver
data structures
,
dp
,
greedy
,
hashing
,
strings
,
two pointers
1800
x1816
79B
Colorful Field
implementation
,
sortings
1400
x7294
77B
Falling Anvils
math
,
probabilities
1800
x2634
77A
Heroes
brute force
,
implementation
1400
x1781
76E
Points
implementation
,
math
1700
x1720
76D
Plus and xor
dp
,
greedy
,
math
1700
x2075
75C
Modified GCD
binary search
,
number theory
1600
x12887
75B
Facetook Priority Wall
expression parsing
,
implementation
,
strings
1500
x3325
74B
Train
dp
,
games
,
greedy
1500
x1550
73C
LionAge II
dp
1800
x2126
73A
The Elder Trolls IV: Oblivon
greedy
,
math
1600
x1356
72I
Goofy Numbers
*special problem
,
implementation
1500
x465
72H
Reverse It!
*special problem
,
implementation
1600
x267
72E
Ali goes shopping
*special problem
,
brute force
,
strings
1800
x173
72A
Goshtasp, Vishtasp and Eidi
*special problem
,
greedy
,
math
1800
x187
71C
Round Table Knights
dp
,
math
,
number theory
1600
x6563
70B
Text Messaging
expression parsing
,
greedy
,
strings
1600
x1780
69E
Subsegments
data structures
,
implementation
1800
x4401
68B
Energy exchange
binary search
1600
x4664
67B
Restoration of the Permutation
greedy
1800
x778
67A
Partial Teacher
dp
,
graphs
,
greedy
,
implementation
1800
x2123
66D
Petya and His Friends
constructive algorithms
,
math
,
number theory
1700
x3187
66C
Petya and File System
data structures
,
implementation
1800
x1078
65B
Harry Potter and the History of Magic
brute force
,
greedy
,
implementation
1700
x1378
65A
Harry Potter and Three Spells
implementation
,
math
1800
x1824
64E
Prime Segment
*special problem
,
brute force
,
math
,
number theory
1800
x243
64D
Presents
*special problem
,
greedy
1800
x289
64C
Table
*special problem
,
greedy
,
implementation
,
math
1600
x339
64B
Expression
*special problem
,
expression parsing
1500
x1019
63C
Bulls and Cows
brute force
,
implementation
1700
x1737
62B
Tyndex.Brome
binary search
,
implementation
1800
x1293
61D
Eternal Victory
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
trees
1800
x6623
60B
Serial Time!
dfs and similar
,
dsu
1400
x4682
59C
Title
expression parsing
1600
x2111
58C
Trees
brute force
1800
x2042
57B
Martian Architecture
implementation
1600
x1022
56C
Corporation Mail
data structures
,
expression parsing
,
implementation
1700
x1172
55B
Smallest number
brute force
1600
x2877
54B
Cutting Jigsaw Puzzle
hashing
,
implementation
1800
x776
53D
Physical Education
sortings
1500
x2046
53B
Blog Photo
binary search
,
implementation
1700
x1417
52B
Right Triangles
combinatorics
1600
x2073
51C
Three Base Stations
binary search
,
greedy
1800
x2016
51B
bHTML Tables Analisys
expression parsing
1700
x875
50B
Choosing Symbol Pairs
strings
1500
x5724
49D
Game
brute force
,
dp
,
implementation
1800
x1919
49C
Disposition
constructive algorithms
,
math
1700
x1697
49B
Sum
math
1500
x2496
48D
Permutations
greedy
1500
x2533
48C
The Race
math
1800
x786
46D
Parking Lot
data structures
,
implementation
1800
x986
46C
Hamsters and Tigers
two pointers
1600
x2457
45J
Planting Trees
constructive algorithms
1800
x946
45I
TCMCF+++
greedy
1400
x2494
44H
Phone Number
dp
1700
x1750
44E
Anfisa the Monkey
dp
1400
x5199
44D
Hyperdrive
math
1800
x716
44B
Cola
implementation
1500
x2013
42B
Game of chess unfinished
implementation
1700
x957
42A
Guilty --- to the kitchen!
greedy
,
implementation
1400
x2860
41B
Martian Dollar
brute force
1400
x4056
40B
Repaintings
math
1600
x1173
39J
Spelling Check
hashing
,
implementation
,
strings
1500
x3006
38E
Let's Go Rolling!
dp
,
sortings
1800
x2589
38C
Blinds
brute force
1400
x2186
37B
Computer Game
greedy
,
implementation
1800
x926
36B
Fractal
implementation
1600
x1515
35D
Animals
dp
,
greedy
1700
x3369
35C
Fire Again
brute force
,
dfs and similar
,
shortest paths
1500
x6934
35B
Warehouse
implementation
1700
x1022
34D
Road Map
dfs and similar
,
graphs
1600
x5228
33C
Wonderful Randomized Sum
greedy
1800
x3028
33B
String Problem
shortest paths
1800
x4606
32D
Constellation
implementation
1600
x1289
32C
Flea
math
1700
x2176
31C
Schedule
implementation
1700
x1828
31B
Sysadmin Bob
greedy
,
implementation
,
strings
1500
x4348
30C
Shooting Gallery
dp
,
probabilities
1800
x1975
30B
Codeforces World Finals
implementation
1700
x1205
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