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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
3 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
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Status
Standings
Custom test
Problems
#
Name
2038N
Fixing the Expression
implementation
800
x4229
2038M
Royal Flush
dp
,
implementation
2800
x134
2038L
Bridge Renovation
brute force
,
dp
,
greedy
,
math
,
two pointers
1400
x2319
2038K
Grid Walk
dp
,
greedy
,
math
,
number theory
2100
x658
2038J
Waiting for...
greedy
,
implementation
800
x3486
2038I
Polyathlon
data structures
,
hashing
,
string suffix structures
,
strings
2500
x311
2038H
Galactic Council
flows
3000
x62
2038G
Guess One Character
constructive algorithms
,
interactive
1900
x1222
2038F
Alternative Platforms
combinatorics
,
data structures
,
fft
,
math
,
sortings
2500
x249
2038E
Barrels
data structures
,
greedy
,
math
2900
x68
2038D
Divide OR Conquer
bitmasks
,
data structures
,
dp
,
implementation
2400
x344
2038C
DIY
data structures
,
geometry
,
greedy
,
sortings
1400
x2154
2038B
Make It Equal
binary search
,
brute force
,
greedy
,
math
2100
x797
2038A
Bonus Project
games
,
greedy
1400
x1890
2037G
Natlan Exploring
bitmasks
,
combinatorics
,
data structures
,
dp
,
math
,
number theory
2000
x1597
2037F
Ardent Flames
binary search
,
data structures
,
math
,
sortings
,
two pointers
2100
x1227
2037E
Kachina's Favorite Binary String
dp
,
greedy
,
interactive
,
two pointers
1600
x3664
2037D
Sharky Surfing
data structures
,
greedy
,
two pointers
1300
x7456
2037C
Superultra's Favorite Permutation
constructive algorithms
,
greedy
,
math
,
number theory
1000
x13615
2037B
Intercepted Inputs
brute force
,
implementation
800
x15938
2037A
Twice
implementation
800
x20636
2036G
Library of Magic
binary search
,
constructive algorithms
,
divide and conquer
,
interactive
,
math
,
number theory
2200
x1034
2036F
XORificator 3000
bitmasks
,
dp
,
number theory
,
two pointers
1900
x3207
2036E
Reverse the Rivers
binary search
,
constructive algorithms
,
data structures
,
greedy
1600
x6263
2036D
I Love 1543
brute force
,
implementation
,
matrices
1300
x11274
2036C
Anya and 1100
brute force
,
implementation
1100
x16000
2036B
Startup
greedy
,
sortings
800
x22528
2036A
Quintomania
implementation
800
x29884
2035H
Peak Productivity Forces
constructive algorithms
3500
x54
2035G2
Go Learn! (Hard Version)
divide and conquer
,
dp
3500
x72
2035G1
Go Learn! (Easy Version)
dp
,
trees
3300
x127
2035F
Tree Operations
binary search
,
brute force
,
dfs and similar
,
dp
,
trees
2500
x768
2035E
Monster
binary search
,
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
,
ternary search
2300
x1484
2035D
Yet Another Real Number Problem
binary search
,
data structures
,
divide and conquer
,
greedy
,
implementation
,
math
1800
x4354
2035C
Alya and Permutation
bitmasks
,
constructive algorithms
,
math
1400
x7863
2035B
Everyone Loves Tres
constructive algorithms
,
greedy
,
math
,
number theory
900
x14384
2035A
Sliding
implementation
,
math
800
x14660
2033G
Sakurako and Chefir
data structures
,
dfs and similar
,
dp
,
greedy
,
trees
2200
x1241
2033F
Kosuke's Sloth
brute force
,
math
,
number theory
1800
x5161
2033E
Sakurako, Kosuke, and the Permutation
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
1400
x9768
2033D
Kousuke's Assignment
data structures
,
dp
,
dsu
,
greedy
,
math
1300
x12860
2033C
Sakurako's Field Trip
dp
,
greedy
,
two pointers
1400
x12462
2033B
Sakurako and Water
brute force
,
constructive algorithms
,
greedy
900
x22733
2033A
Sakurako and Kosuke
constructive algorithms
,
implementation
,
math
800
x32577
2032F
Peanuts
combinatorics
,
dp
,
games
,
math
2700
x247
2032E
Balanced
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
2400
x916
2032D
Genokraken
constructive algorithms
,
data structures
,
graphs
,
greedy
,
implementation
,
interactive
,
trees
,
two pointers
1800
x4436
2032C
Trinity
binary search
,
math
,
sortings
,
two pointers
1400
x10889
2032B
Medians
constructive algorithms
,
greedy
,
implementation
,
math
1100
x15282
2032A
Circuit
greedy
,
implementation
,
math
,
number theory
800
x19967
2031F
Penchick and Even Medians
binary search
,
constructive algorithms
,
interactive
,
probabilities
2800
x200
2031E
Penchick and Chloe's Trees
data structures
,
dfs and similar
,
dp
,
greedy
,
implementation
,
math
,
sortings
,
trees
2100
x1442
2031D
Penchick and Desert Rabbit
binary search
,
data structures
,
dp
,
dsu
,
greedy
,
two pointers
1700
x4849
2031C
Penchick and BBQ Buns
constructive algorithms
,
math
,
number theory
1300
x8585
2031B
Penchick and Satay Sticks
brute force
,
greedy
,
sortings
900
x12656
2031A
Penchick and Modern Monument
constructive algorithms
,
dp
,
greedy
,
math
800
x13837
2030G2
The Destruction of the Universe (Hard Version)
combinatorics
,
math
3100
x108
2030G1
The Destruction of the Universe (Easy Version)
combinatorics
,
greedy
,
math
2900
x146
2030F
Orangutan Approved Subarrays
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
two pointers
2400
x671
2030E
MEXimize the Score
combinatorics
,
data structures
,
dp
,
greedy
,
implementation
,
math
2200
x1306
2030D
QED's Favorite Permutation
data structures
,
implementation
,
sortings
1700
x6179
2030C
A TRUE Battle
brute force
,
games
,
greedy
1100
x15597
2030B
Minimise Oneness
combinatorics
,
constructive algorithms
,
games
,
math
800
x19911
2030A
A Gift From Orangutan
constructive algorithms
,
greedy
,
math
,
sortings
800
x23244
2029I
Variance Challenge
flows
,
graphs
,
greedy
3400
x24
2029H
Message Spread
bitmasks
,
brute force
,
combinatorics
,
dp
3500
x38
2029G
Balanced Problem
data structures
,
dp
3000
x118
2029F
Palindrome Everywhere
constructive algorithms
,
graphs
,
greedy
2500
x598
2029E
Common Generator
brute force
,
constructive algorithms
,
math
,
number theory
2100
x2318
2029D
Cool Graph
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
trees
1900
x2547
2029C
New Rating
binary search
,
data structures
,
dp
,
greedy
1700
x4668
2029B
Replacement
constructive algorithms
,
games
,
strings
1100
x8009
2029A
Set
greedy
,
math
800
x10704
2028F
Alice's Adventures in Addition
bitmasks
,
brute force
,
dp
,
implementation
2700
x273
2028E
Alice's Adventures in the Rabbit Hole
combinatorics
,
dfs and similar
,
dp
,
games
,
greedy
,
math
,
probabilities
,
trees
2300
x1055
2028D
Alice's Adventures in Cards
constructive algorithms
,
data structures
,
dp
,
graphs
,
greedy
,
implementation
,
ternary search
2000
x2198
2028C
Alice's Adventures in Cutting Cake
binary search
,
dp
,
greedy
,
two pointers
1600
x5593
2028B
Alice's Adventures in Permuting
binary search
,
implementation
,
math
1400
x8173
2028A
Alice's Adventures in ''Chess''
brute force
,
implementation
,
math
900
x13353
2027E2
Bit Game (Hard Version)
bitmasks
,
dp
,
math
3100
x48
2027E1
Bit Game (Easy Version)
bitmasks
,
brute force
,
games
,
math
2800
x126
2027D2
The Endspeaker (Hard Version)
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
two pointers
2200
x1274
2027D1
The Endspeaker (Easy Version)
binary search
,
dp
,
graphs
,
greedy
,
implementation
,
two pointers
1700
x4613
2027C
Add Zeros
brute force
,
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
1500
x8726
2027B
Stalin Sort
brute force
,
greedy
1100
x13403
2027A
Rectangle Arrangement
geometry
,
implementation
,
math
800
x18263
2026F
Bermart Ice Cream
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
implementation
,
trees
2700
x169
2026E
Best Subsequence
bitmasks
,
dfs and similar
,
flows
,
graph matchings
,
graphs
2500
x1081
2026D
Sums of Segments
binary search
,
data structures
,
dp
,
implementation
,
math
1900
x3909
2026C
Action Figures
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
1500
x8479
2026B
Black Cells
binary search
,
brute force
,
constructive algorithms
,
greedy
1300
x11583
2026A
Perpendicular Segments
constructive algorithms
,
geometry
,
greedy
,
math
900
x15718
2025G
Variable Damage
data structures
,
flows
3000
x134
2025F
Choose Your Queries
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2700
x675
2025E
Card Game
combinatorics
,
dp
,
fft
,
greedy
,
math
2200
x1739
2025D
Attribute Checks
brute force
,
data structures
,
dp
,
implementation
,
math
,
two pointers
1800
x5849
2025C
New Game
binary search
,
brute force
,
greedy
,
implementation
,
sortings
,
two pointers
1300
x14377
2025B
Binomial Coefficients, Kind Of
combinatorics
,
dp
,
math
1100
x16351
2025A
Two Screens
binary search
,
greedy
,
strings
,
two pointers
800
x23326
2024B
Buying Lemonade
binary search
,
constructive algorithms
,
sortings
1100
x12997
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