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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
43:33:12
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Difficulty:
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greedy
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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Problems
#
Name
2038L
Bridge Renovation
brute force
,
dp
,
greedy
,
math
,
two pointers
1400
x2640
2038K
Grid Walk
brute force
,
dp
,
greedy
,
math
,
number theory
2100
x739
2038J
Waiting for...
greedy
,
implementation
800
x3935
2038E
Barrels
data structures
,
greedy
,
math
2900
x71
2038C
DIY
data structures
,
geometry
,
greedy
,
sortings
1400
x2427
2038B
Make It Equal
binary search
,
brute force
,
greedy
,
math
2100
x900
2038A
Bonus Project
games
,
greedy
1400
x2119
2037E
Kachina's Favorite Binary String
dp
,
greedy
,
interactive
,
two pointers
1600
x3897
2037D
Sharky Surfing
data structures
,
greedy
,
two pointers
1300
x7794
2037C
Superultra's Favorite Permutation
constructive algorithms
,
greedy
,
math
,
number theory
1000
x14153
2036E
Reverse the Rivers
binary search
,
constructive algorithms
,
data structures
,
greedy
1600
x6311
2036B
Startup
greedy
,
sortings
800
x22644
2035E
Monster
binary search
,
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
,
ternary search
2300
x1491
2035D
Yet Another Real Number Problem
binary search
,
data structures
,
divide and conquer
,
greedy
,
implementation
,
math
1800
x4374
2035B
Everyone Loves Tres
constructive algorithms
,
greedy
,
math
,
number theory
900
x14449
2033G
Sakurako and Chefir
data structures
,
dfs and similar
,
dp
,
greedy
,
trees
2200
x1249
2033E
Sakurako, Kosuke, and the Permutation
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
1400
x9799
2033D
Kousuke's Assignment
data structures
,
dp
,
dsu
,
greedy
,
math
1300
x12892
2033C
Sakurako's Field Trip
dp
,
greedy
,
two pointers
1400
x12497
2033B
Sakurako and Water
brute force
,
constructive algorithms
,
greedy
900
x22771
2032E
Balanced
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
2400
x926
2032D
Genokraken
constructive algorithms
,
data structures
,
graphs
,
greedy
,
implementation
,
interactive
,
trees
,
two pointers
1800
x4468
2032B
Medians
constructive algorithms
,
greedy
,
implementation
,
math
1100
x15342
2032A
Circuit
greedy
,
implementation
,
math
,
number theory
800
x20031
2031E
Penchick and Chloe's Trees
data structures
,
dfs and similar
,
dp
,
greedy
,
implementation
,
math
,
sortings
,
trees
2100
x1500
2031D
Penchick and Desert Rabbit
binary search
,
data structures
,
dfs and similar
,
dp
,
dsu
,
greedy
,
implementation
,
two pointers
1700
x5020
2031B
Penchick and Satay Sticks
brute force
,
greedy
,
sortings
900
x12889
2031A
Penchick and Modern Monument
constructive algorithms
,
dp
,
greedy
,
math
800
x14082
2030G1
The Destruction of the Universe (Easy Version)
combinatorics
,
greedy
,
math
2900
x147
2030F
Orangutan Approved Subarrays
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
two pointers
2400
x672
2030E
MEXimize the Score
combinatorics
,
data structures
,
dp
,
greedy
,
implementation
,
math
2200
x1311
2030C
A TRUE Battle
brute force
,
games
,
greedy
1100
x15625
2030A
A Gift From Orangutan
constructive algorithms
,
greedy
,
math
,
sortings
800
x23272
2029I
Variance Challenge
flows
,
graphs
,
greedy
3400
x24
2029F
Palindrome Everywhere
constructive algorithms
,
graphs
,
greedy
2500
x607
2029D
Cool Graph
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
trees
1900
x2577
2029C
New Rating
binary search
,
data structures
,
dp
,
greedy
1700
x4706
2029A
Set
greedy
,
math
800
x10756
2028E
Alice's Adventures in the Rabbit Hole
combinatorics
,
dfs and similar
,
dp
,
games
,
greedy
,
math
,
probabilities
,
trees
2300
x1071
2028D
Alice's Adventures in Cards
constructive algorithms
,
data structures
,
dp
,
graphs
,
greedy
,
implementation
,
ternary search
2000
x2243
2028C
Alice's Adventures in Cutting Cake
binary search
,
dp
,
greedy
,
two pointers
1600
x5684
2027D2
The Endspeaker (Hard Version)
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
two pointers
2200
x1284
2027D1
The Endspeaker (Easy Version)
binary search
,
dp
,
graphs
,
greedy
,
implementation
,
two pointers
1700
x4638
2027C
Add Zeros
brute force
,
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
1500
x8771
2027B
Stalin Sort
brute force
,
greedy
1100
x13458
2026C
Action Figures
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
1500
x8513
2026B
Black Cells
binary search
,
brute force
,
constructive algorithms
,
greedy
1300
x11618
2026A
Perpendicular Segments
constructive algorithms
,
geometry
,
greedy
,
math
900
x15758
2025F
Choose Your Queries
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2700
x679
2025E
Card Game
combinatorics
,
dp
,
fft
,
greedy
,
math
2200
x1744
2025C
New Game
binary search
,
brute force
,
greedy
,
implementation
,
sortings
,
two pointers
1300
x14408
2025A
Two Screens
binary search
,
greedy
,
strings
,
two pointers
800
x23367
2024A
Profitable Interest Rate
greedy
,
math
800
x18701
2023F
Hills and Pits
data structures
,
greedy
,
math
,
matrices
3500
x58
2023E
Tree of Life
dp
,
greedy
,
trees
3300
x87
2023D
Many Games
brute force
,
dp
,
greedy
,
math
,
probabilities
2900
x399
2023C
C+K+S
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
hashing
,
implementation
,
strings
2400
x943
2023A
Concatenation of Arrays
constructive algorithms
,
greedy
,
math
,
sortings
1300
x11878
2022B
Kar Salesman
binary search
,
greedy
,
math
1300
x9867
2022A
Bus to Pénjamo
constructive algorithms
,
greedy
,
implementation
,
math
800
x13680
2021E3
Digital Village (Extreme Version)
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
,
greedy
,
math
,
trees
2800
x425
2021E1
Digital Village (Easy Version)
brute force
,
data structures
,
dfs and similar
,
dp
,
dsu
,
fft
,
graphs
,
greedy
,
implementation
,
math
,
trees
2300
x1477
2021D
Boss, Thirsty
dp
,
greedy
,
implementation
2500
x674
2021C2
Adjust The Presentation (Hard Version)
constructive algorithms
,
data structures
,
greedy
,
implementation
,
sortings
1900
x3545
2021C1
Adjust The Presentation (Easy Version)
constructive algorithms
,
greedy
1300
x11370
2021B
Maximize Mex
brute force
,
greedy
,
math
,
number theory
1200
x14243
2021A
Meaning Mean
data structures
,
greedy
,
math
,
sortings
800
x18528
2020A
Find Minimum Operations
bitmasks
,
brute force
,
greedy
,
math
,
number theory
800
x21805
2019A
Max Plus Size
brute force
,
dp
,
greedy
800
x22785
2018F3
Speedbreaker Counting (Hard Version)
dp
,
greedy
,
math
3100
x174
2018F2
Speedbreaker Counting (Medium Version)
dp
,
greedy
,
math
3000
x167
2018F1
Speedbreaker Counting (Easy Version)
combinatorics
,
dp
,
greedy
,
math
2900
x208
2018E2
Complex Segments (Hard Version)
binary search
,
data structures
,
divide and conquer
,
dsu
,
greedy
,
math
,
sortings
3400
x111
2018E1
Complex Segments (Easy Version)
binary search
,
data structures
,
divide and conquer
,
dsu
,
greedy
,
math
,
sortings
3300
x147
2018D
Max Plus Min Plus Size
data structures
,
dp
,
dsu
,
greedy
,
implementation
,
matrices
,
sortings
2200
x1586
2018C
Tree Pruning
brute force
,
dfs and similar
,
greedy
,
sortings
,
trees
1700
x6136
2018B
Speedbreaker
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
two pointers
1900
x3927
2018A
Cards Partition
2-sat
,
brute force
,
greedy
,
implementation
,
math
1600
x10113
2014H
Robin Hood Archery
data structures
,
divide and conquer
,
greedy
,
hashing
1900
x3483
2014G
Milky Days
brute force
,
data structures
,
greedy
,
implementation
2200
x1273
2014F
Sheriff's Defense
dfs and similar
,
dp
,
greedy
,
trees
2000
x3549
2014D
Robert Hood and Mrs Hood
brute force
,
data structures
,
greedy
,
sortings
1400
x12046
2014C
Robin Hood in Town
binary search
,
greedy
,
math
1100
x21482
2014A
Robin Helps
greedy
,
implementation
800
x36904
2013F1
Game in Tree (Easy Version)
binary search
,
brute force
,
data structures
,
dp
,
games
,
greedy
,
implementation
,
trees
2700
x473
2013E
Prefix GCD
brute force
,
dp
,
greedy
,
math
,
number theory
2200
x3184
2013D
Minimize the Difference
binary search
,
greedy
1900
x6005
2013B
Battle for Survive
constructive algorithms
,
greedy
,
math
900
x22898
2011H
Strange Matrix
*special problem
,
graphs
,
greedy
x45
2011F
Good Subarray
*special problem
,
data structures
,
greedy
x115
2011E
Rock-Paper-Scissors Bot
*special problem
,
greedy
,
strings
x160
2008H
Sakurako's Test
binary search
,
brute force
,
greedy
,
math
,
number theory
2100
x2904
2008G
Sakurako's Task
binary search
,
greedy
,
math
,
number theory
1800
x5144
2008E
Alternating String
brute force
,
data structures
,
dp
,
greedy
,
implementation
,
strings
1500
x9965
2008A
Sakurako's Exam
brute force
,
constructive algorithms
,
greedy
,
math
800
x35129
2007B
Index and Maximum Value
data structures
,
greedy
900
x21144
2007A
Dora's Set
greedy
,
math
,
number theory
800
x22609
2006D
Iris and Adjacent Products
data structures
,
greedy
,
implementation
,
math
2600
x673
2006A
Iris and Game on the Tree
constructive algorithms
,
dfs and similar
,
games
,
graphs
,
greedy
,
trees
1700
x6748
2005E2
Subtangle Game (Hard Version)
data structures
,
dp
,
games
,
greedy
,
implementation
2500
x796
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