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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
3 days
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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
923B
Producing Snow
binary search
,
data structures
1600
x7352
923A
Primal Sport
math
,
number theory
1700
x5039
922F
Divisibility
constructive algorithms
,
dp
,
greedy
,
number theory
2400
x645
922E
Birds
dp
2200
x2161
922D
Robot Vacuum Cleaner
greedy
,
sortings
1800
x4396
922C
Cave Painting
brute force
,
number theory
1600
x7143
922B
Magic Forest
brute force
1300
x8524
922A
Cloning Toys
implementation
1300
x11703
92114
Labyrinth-14
3200
92113
Labyrinth-13
3200
92112
Labyrinth-12
3200
92111
Labyrinth-11
3200
92110
Labyrinth-10
3200
92109
Labyrinth-9
3200
92108
Labyrinth-8
3200
92107
Labyrinth-7
3200
92106
Labyrinth-6
3200
92105
Labyrinth-5
3200
92104
Labyrinth-4
3200
92103
Labyrinth-3
3200
92102
Labyrinth-2
3200
92101
Labyrinth-1
3200
920G
List Of Integers
binary search
,
bitmasks
,
brute force
,
combinatorics
,
math
,
number theory
2200
x1760
920F
SUM and REPLACE
brute force
,
data structures
,
dsu
,
number theory
2000
x6910
920E
Connected Components?
data structures
,
dfs and similar
,
dsu
,
graphs
2100
x6464
920D
Tanks
dp
,
greedy
,
implementation
2400
x730
920C
Swap Adjacent Elements
dfs and similar
,
greedy
,
math
,
sortings
,
two pointers
1400
x9241
920B
Tea Queue
implementation
1200
x7387
920A
Water The Garden
implementation
1000
x7788
919F
A Game With Numbers
games
,
graphs
,
shortest paths
2600
x340
919E
Congruence Equation
chinese remainder theorem
,
math
,
number theory
2100
x2140
919D
Substring
dfs and similar
,
dp
,
graphs
1700
x10208
919C
Seat Arrangements
brute force
,
implementation
1300
x8996
919B
Perfect Number
binary search
,
brute force
,
dp
,
implementation
,
number theory
1100
x28388
919A
Supermarket
brute force
,
greedy
,
implementation
800
x16157
918B
Radio Station
implementation
,
strings
900
x16876
918A
Eleven
brute force
,
implementation
800
x17118
917E
Upside Down
data structures
,
string suffix structures
,
strings
,
trees
3400
x136
917D
Stranger Trees
dp
,
math
,
matrices
,
trees
2600
x1161
917C
Pollywog
combinatorics
,
dp
,
matrices
2900
x406
917B
MADMAX
dfs and similar
,
dp
,
games
,
graphs
1700
x3543
917A
The Monster
dp
,
greedy
,
implementation
,
math
1800
x3527
916E
Jamie and Tree
data structures
,
trees
2400
x1688
916D
Jamie and To-do List
data structures
,
interactive
,
trees
2200
x518
916C
Jamie and Interesting Graph
constructive algorithms
,
graphs
,
shortest paths
1600
x5127
916B
Jamie and Binary Sequence (changed after round)
bitmasks
,
greedy
,
math
2000
x1919
916A
Jamie and Alarm Snooze
brute force
,
implementation
,
math
900
x8615
915G
Coprime Arrays
math
,
number theory
2300
x1275
915F
Imbalance Value of a Tree
data structures
,
dsu
,
graphs
,
trees
2400
x2530
915E
Physical Education Lessons
data structures
,
implementation
,
sortings
2300
x4494
915D
Almost Acyclic Graph
dfs and similar
,
graphs
2200
x3466
915C
Permute Digits
dp
,
greedy
1700
x7091
915B
Browser
implementation
1300
x7797
915A
Garden
implementation
900
x14814
914H
Ember and Storm's Tree Game
combinatorics
,
dp
,
games
,
trees
3400
x240
914G
Sum the Fibonacci
bitmasks
,
divide and conquer
,
dp
,
fft
,
math
2600
x936
914F
Substrings in a String
bitmasks
,
brute force
,
data structures
,
string suffix structures
,
strings
3000
x1674
914E
Palindromes in a Tree
bitmasks
,
data structures
,
divide and conquer
,
trees
2400
x1517
914D
Bash and a Tough Math Puzzle
data structures
,
number theory
1900
x5350
914C
Travelling Salesman and Special Numbers
brute force
,
combinatorics
,
dp
1800
x3844
914B
Conan and Agasa play a Card Game
games
,
greedy
,
implementation
1200
x8636
914A
Perfect Squares
brute force
,
implementation
,
math
900
x14196
913H
Don't Exceed
math
,
probabilities
3400
x127
913G
Power Substring
math
,
number theory
3200
x209
913F
Strongly Connected Tournament
dp
,
graphs
,
math
,
probabilities
2800
x659
913E
Logical Expression
bitmasks
,
dp
,
shortest paths
2400
x809
913D
Too Easy Problems
binary search
,
brute force
,
data structures
,
greedy
,
sortings
1800
x4749
913C
Party Lemonade
bitmasks
,
dp
,
greedy
1600
x7948
913B
Christmas Spruce
implementation
,
trees
1200
x16173
913A
Modular Exponentiation
implementation
,
math
900
x21396
912E
Prime Gift
binary search
,
dfs and similar
,
math
,
meet-in-the-middle
,
number theory
,
two pointers
2400
x1621
912D
Fishes
data structures
,
graphs
,
greedy
,
probabilities
,
shortest paths
2100
x2019
912C
Perun, Ult!
brute force
,
greedy
,
sortings
2500
x520
912B
New Year's Eve
bitmasks
,
constructive algorithms
,
number theory
1300
x12122
912A
Tricky Alchemy
implementation
800
x13534
911G
Mass Change Queries
data structures
2500
x2929
911F
Tree Destruction
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2400
x1754
911E
Stack Sorting
constructive algorithms
,
data structures
,
greedy
,
implementation
2000
x2562
911D
Inversion Counting
brute force
,
math
1800
x4612
911C
Three Garlands
brute force
,
constructive algorithms
1400
x7052
911B
Two Cakes
binary search
,
brute force
,
implementation
1200
x11456
911A
Nearest Minimums
implementation
1100
x11497
910C
Minimum Sum
constructive algorithms
,
greedy
,
math
1700
x1812
910B
Door Frames
greedy
,
implementation
1600
x1709
910A
The Way to Home
dfs and similar
,
dp
,
greedy
,
implementation
800
x12102
909F
AND-permutations
constructive algorithms
2500
x581
909E
Coprocessor
dfs and similar
,
dp
,
graphs
,
greedy
1900
x2112
909D
Colorful Points
data structures
,
greedy
,
implementation
2100
x1949
909C
Python Indentation
dp
1800
x4952
909B
Segments
constructive algorithms
,
math
1300
x6421
909A
Generate Login
brute force
,
greedy
,
sortings
1000
x9337
908H
New Year and Boolean Bridges
3100
x387
908G
New Year and Original Order
dp
,
math
2800
x1376
908F
New Year and Rainbow Roads
graphs
,
greedy
,
implementation
2400
x1401
908E
New Year and Entity Enumeration
bitmasks
,
combinatorics
,
dp
,
math
2500
x760
908D
New Year and Arbitrary Arrangement
dp
,
math
,
probabilities
2200
x2392
908C
New Year and Curling
brute force
,
geometry
,
implementation
,
math
1500
x6932
908B
New Year and Buggy Bot
brute force
,
implementation
1200
x7666
908A
New Year and Counting Cards
brute force
,
implementation
800
x14829
907B
Tic-Tac-Toe
implementation
1400
x4069
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