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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
4 days
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combine-tags-by-or
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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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Problems
#
Name
1163C1
Power Transmission (Easy Edition)
brute force
,
geometry
1900
x3339
1163B2
Cat Party (Hard Edition)
data structures
,
implementation
1600
x7265
1163B1
Cat Party (Easy Edition)
data structures
,
implementation
1500
x7006
1163A
Eating Soup
greedy
,
math
900
x13033
1162B
Double Matrix
brute force
,
greedy
1400
x5818
1162A
Zoning Restrictions Again
implementation
800
x8281
1159B
Expansion coefficient of the array
implementation
,
math
1300
x7093
1159A
A pile of stones
implementation
,
math
800
x12720
1158F
Density of subarrays
dp
,
math
3500
x411
1158E
Strange device
binary search
,
interactive
,
math
,
trees
3400
x152
1158D
Winding polygonal line
constructive algorithms
,
geometry
,
greedy
,
math
2600
x840
1158C
Permutation recovery
constructive algorithms
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
math
,
sortings
2100
x1955
1158B
The minimal unique substring
constructive algorithms
,
math
,
strings
2200
x2244
1158A
The Party and Sweets
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
,
sortings
,
two pointers
1500
x7209
1157G
Inverse of Rows and Columns
brute force
,
constructive algorithms
2200
x927
1157F
Maximum Balanced Circle
constructive algorithms
,
dp
,
greedy
,
two pointers
2000
x2660
1157E
Minimum Array
binary search
,
data structures
,
greedy
1700
x8441
1157D
N Problems During K Days
constructive algorithms
,
greedy
,
math
1900
x3764
1157C2
Increasing Subsequence (hard version)
greedy
1700
x8065
1157C1
Increasing Subsequence (easy version)
greedy
1300
x12673
1157B
Long Number
greedy
1300
x14761
1157A
Reachable Numbers
implementation
1100
x15716
1156G
Optimizer
graphs
,
greedy
,
hashing
,
implementation
2700
x132
1156F
Card Bag
dp
,
math
,
probabilities
2300
x1455
1156E
Special Segments of Permutation
data structures
,
divide and conquer
,
dsu
,
two pointers
2200
x3083
1156D
0-1-Tree
dfs and similar
,
divide and conquer
,
dp
,
dsu
,
trees
2200
x3952
1156C
Match Points
binary search
,
greedy
,
sortings
,
ternary search
,
two pointers
2000
x6156
1156B
Ugly Pairs
dfs and similar
,
greedy
,
implementation
,
sortings
,
strings
1800
x6240
1156A
Inscribed Figures
geometry
1400
x8233
1155F
Delivery Oligopoly
brute force
,
dp
,
graphs
2800
x419
1155E
Guess the Root
brute force
,
interactive
,
math
2200
x1444
1155D
Beautiful Array
brute force
,
data structures
,
divide and conquer
,
dp
,
greedy
1900
x6963
1155C
Alarm Clocks Everywhere
math
,
number theory
1300
x9250
1155B
Game with Telephone Numbers
games
,
greedy
,
implementation
1200
x11933
1155A
Reverse a Substring
implementation
,
sortings
,
strings
1000
x15373
1154G
Minimum Possible LCM
brute force
,
greedy
,
math
,
number theory
2200
x2810
1154F
Shovels Shop
dp
,
greedy
,
sortings
2100
x2867
1154E
Two Teams
data structures
,
implementation
,
sortings
1800
x6353
1154D
Walking Robot
greedy
1500
x10003
1154C
Gourmet Cat
implementation
,
math
1400
x10444
1154B
Make Them Equal
math
1200
x16702
1154A
Restoring Three Numbers
math
800
x71996
1153F
Serval and Bonus Problem
combinatorics
,
dp
,
math
,
probabilities
2600
x812
1153E
Serval and Snake
binary search
,
brute force
,
interactive
2200
x1508
1153D
Serval and Rooted Tree
binary search
,
dfs and similar
,
dp
,
greedy
,
trees
1900
x5015
1153C
Serval and Parenthesis Sequence
greedy
,
strings
1700
x7433
1153B
Serval and Toy Bricks
constructive algorithms
,
greedy
1200
x9093
1153A
Serval and Bus
brute force
,
math
1000
x11522
1152F2
Neko Rules the Catniverse (Large Version)
bitmasks
,
dp
,
matrices
3000
x675
1152F1
Neko Rules the Catniverse (Small Version)
bitmasks
,
dp
,
matrices
2800
x575
1152E
Neko and Flashback
constructive algorithms
,
dfs and similar
,
graphs
2400
x988
1152D
Neko and Aki's Prank
dp
,
greedy
,
trees
2100
x2432
1152C
Neko does Maths
brute force
,
math
,
number theory
1800
x6713
1152B
Neko Performs Cat Furrier Transform
bitmasks
,
constructive algorithms
,
dfs and similar
,
math
1300
x8949
1152A
Neko Finds Grapes
greedy
,
implementation
,
math
800
x15336
1151F
Sonya and Informatics
combinatorics
,
dp
,
matrices
,
probabilities
2300
x1246
1151E
Number of Components
combinatorics
,
data structures
,
dp
,
math
2100
x3352
1151D
Stas and the Queue at the Buffet
greedy
,
math
,
sortings
1600
x8467
1151C
Problem for Nazar
constructive algorithms
,
math
1800
x5367
1151B
Dima and a Bad XOR
bitmasks
,
brute force
,
constructive algorithms
,
dp
1600
x11295
1151A
Maxim and Biology
brute force
,
strings
1000
x11238
1150B
Tiling Challenge
greedy
,
implementation
900
x11330
1150A
Stock Arbitraging
greedy
,
implementation
800
x11874
1149E
Election Promises
games
,
graphs
3200
x531
1149D
Abandoning Roads
brute force
,
dp
,
graphs
,
greedy
3000
x791
1149C
Tree Generator™
data structures
,
implementation
,
trees
2700
x1298
1149B
Three Religions
dp
,
implementation
,
strings
2200
x1905
1149A
Prefix Sum Primes
constructive algorithms
,
greedy
,
math
,
number theory
1200
x15296
1148H
Holy Diver
data structures
3500
x267
1148G
Gold Experience
constructive algorithms
,
graphs
,
math
,
number theory
,
probabilities
3300
x337
1148F
Foo Fighters
bitmasks
,
constructive algorithms
2700
x1046
1148E
Earth Wind and Fire
constructive algorithms
,
greedy
,
math
,
sortings
,
two pointers
2300
x1685
1148D
Dirty Deeds Done Dirt Cheap
greedy
,
sortings
1800
x5001
1148C
Crazy Diamond
constructive algorithms
,
sortings
1700
x5317
1148B
Born This Way
binary search
,
brute force
,
two pointers
1600
x7518
1148A
Another One Bites The Dust
greedy
800
x14933
1147F
Zigzag Game
games
,
interactive
3500
x265
1147E
Rainbow Coins
interactive
3000
x343
1147D
Palindrome XOR
dfs and similar
,
graphs
2400
x756
1147C
Thanos Nim
games
2000
x3292
1147B
Chladni Figure
brute force
,
strings
1900
x2890
1147A
Hide and Seek
graphs
1500
x5263
1146H
Satanic Panic
dp
,
geometry
2900
x607
1146G
Zoning Restrictions
dp
,
flows
,
graphs
2700
x843
1146F
Leaf Partition
dp
,
trees
2500
x1188
1146E
Hot is Cold
bitmasks
,
data structures
,
divide and conquer
,
implementation
2400
x912
1146D
Frog Jumping
dfs and similar
,
math
,
number theory
2100
x1109
1146C
Tree Diameter
bitmasks
,
graphs
,
interactive
1700
x3710
1146B
Hate "A"
implementation
,
strings
1100
x8626
1146A
Love "A"
implementation
,
strings
800
x22015
1144G
Two Merged Sequences
dp
,
greedy
2400
x2015
1144F
Graph Without Long Directed Paths
dfs and similar
,
graphs
1700
x11756
1144E
Median String
bitmasks
,
math
,
number theory
,
strings
1900
x4182
1144D
Equalize Them All
constructive algorithms
,
greedy
1400
x10341
1144C
Two Shuffled Sequences
constructive algorithms
,
sortings
1000
x15445
1144B
Parity Alternated Deletions
greedy
,
implementation
,
sortings
900
x17159
1144A
Diverse Strings
implementation
,
strings
800
x19366
1143C
Queen
dfs and similar
,
trees
1400
x12710
1143B
Nirvana
brute force
,
math
,
number theory
1200
x10580
1143A
The Doors
implementation
800
x13288
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