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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
2 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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Status
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Custom test
Problems
#
Name
2038N
Fixing the Expression
implementation
800
x4544
2038M
Royal Flush
dp
,
implementation
2800
x142
2038L
Bridge Renovation
brute force
,
dp
,
greedy
,
math
,
two pointers
1400
x2452
2038K
Grid Walk
brute force
,
dp
,
greedy
,
math
,
number theory
2100
x689
2038J
Waiting for...
greedy
,
implementation
800
x3669
2038I
Polyathlon
data structures
,
hashing
,
string suffix structures
,
strings
2500
x323
2038H
Galactic Council
flows
3000
x66
2038G
Guess One Character
constructive algorithms
,
implementation
,
interactive
1900
x1277
2038F
Alternative Platforms
combinatorics
,
data structures
,
fft
,
math
,
sortings
2500
x258
2038E
Barrels
data structures
,
greedy
,
math
2900
x70
2038D
Divide OR Conquer
bitmasks
,
data structures
,
dp
,
implementation
2400
x356
2038C
DIY
data structures
,
geometry
,
greedy
,
sortings
1400
x2243
2038B
Make It Equal
binary search
,
brute force
,
greedy
,
math
2100
x831
2038A
Bonus Project
games
,
greedy
1400
x1980
2037G
Natlan Exploring
bitmasks
,
combinatorics
,
data structures
,
dp
,
math
,
number theory
2000
x1662
2037F
Ardent Flames
binary search
,
data structures
,
math
,
sortings
,
two pointers
2100
x1275
2037E
Kachina's Favorite Binary String
dp
,
greedy
,
interactive
,
two pointers
1600
x3772
2037D
Sharky Surfing
data structures
,
greedy
,
two pointers
1300
x7612
2037C
Superultra's Favorite Permutation
constructive algorithms
,
greedy
,
math
,
number theory
1000
x13863
2037B
Intercepted Inputs
brute force
,
implementation
800
x16182
2037A
Twice
implementation
800
x20897
2036G
Library of Magic
binary search
,
constructive algorithms
,
divide and conquer
,
interactive
,
math
,
number theory
2200
x1041
2036F
XORificator 3000
bitmasks
,
dp
,
number theory
,
two pointers
1900
x3226
2036E
Reverse the Rivers
binary search
,
constructive algorithms
,
data structures
,
greedy
1600
x6281
2036D
I Love 1543
brute force
,
implementation
,
matrices
1300
x11309
2036C
Anya and 1100
brute force
,
implementation
1100
x16043
2036B
Startup
greedy
,
sortings
800
x22580
2036A
Quintomania
implementation
800
x29948
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
x769
2035E
Monster
binary search
,
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
,
ternary search
2300
x1485
2035D
Yet Another Real Number Problem
binary search
,
data structures
,
divide and conquer
,
greedy
,
implementation
,
math
1800
x4361
2035C
Alya and Permutation
bitmasks
,
constructive algorithms
,
math
1400
x7873
2035B
Everyone Loves Tres
constructive algorithms
,
greedy
,
math
,
number theory
900
x14414
2035A
Sliding
implementation
,
math
800
x14669
2033G
Sakurako and Chefir
data structures
,
dfs and similar
,
dp
,
greedy
,
trees
2200
x1244
2033F
Kosuke's Sloth
brute force
,
math
,
number theory
1800
x5162
2033E
Sakurako, Kosuke, and the Permutation
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
1400
x9783
2033D
Kousuke's Assignment
data structures
,
dp
,
dsu
,
greedy
,
math
1300
x12874
2033C
Sakurako's Field Trip
dp
,
greedy
,
two pointers
1400
x12479
2033B
Sakurako and Water
brute force
,
constructive algorithms
,
greedy
900
x22750
2033A
Sakurako and Kosuke
constructive algorithms
,
implementation
,
math
800
x32605
2032F
Peanuts
combinatorics
,
dp
,
games
,
math
2700
x250
2032E
Balanced
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
2400
x918
2032D
Genokraken
constructive algorithms
,
data structures
,
graphs
,
greedy
,
implementation
,
interactive
,
trees
,
two pointers
1800
x4452
2032C
Trinity
binary search
,
math
,
sortings
,
two pointers
1400
x10920
2032B
Medians
constructive algorithms
,
greedy
,
implementation
,
math
1100
x15310
2032A
Circuit
greedy
,
implementation
,
math
,
number theory
800
x19995
2031F
Penchick and Even Medians
binary search
,
constructive algorithms
,
interactive
,
probabilities
2800
x205
2031E
Penchick and Chloe's Trees
data structures
,
dfs and similar
,
dp
,
greedy
,
implementation
,
math
,
sortings
,
trees
2100
x1466
2031D
Penchick and Desert Rabbit
binary search
,
data structures
,
dp
,
dsu
,
greedy
,
two pointers
1700
x4913
2031C
Penchick and BBQ Buns
constructive algorithms
,
math
,
number theory
1300
x8677
2031B
Penchick and Satay Sticks
brute force
,
greedy
,
sortings
900
x12745
2031A
Penchick and Modern Monument
constructive algorithms
,
dp
,
greedy
,
math
800
x13928
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
x1309
2030D
QED's Favorite Permutation
data structures
,
implementation
,
sortings
1700
x6185
2030C
A TRUE Battle
brute force
,
games
,
greedy
1100
x15606
2030B
Minimise Oneness
combinatorics
,
constructive algorithms
,
games
,
math
800
x19921
2030A
A Gift From Orangutan
constructive algorithms
,
greedy
,
math
,
sortings
800
x23258
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
x601
2029E
Common Generator
brute force
,
constructive algorithms
,
math
,
number theory
2100
x2323
2029D
Cool Graph
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
trees
1900
x2561
2029C
New Rating
binary search
,
data structures
,
dp
,
greedy
1700
x4685
2029B
Replacement
constructive algorithms
,
games
,
strings
1100
x8030
2029A
Set
greedy
,
math
800
x10728
2028F
Alice's Adventures in Addition
bitmasks
,
brute force
,
dp
,
implementation
2700
x279
2028E
Alice's Adventures in the Rabbit Hole
combinatorics
,
dfs and similar
,
dp
,
games
,
greedy
,
math
,
probabilities
,
trees
2300
x1066
2028D
Alice's Adventures in Cards
constructive algorithms
,
data structures
,
dp
,
graphs
,
greedy
,
implementation
,
ternary search
2000
x2217
2028C
Alice's Adventures in Cutting Cake
binary search
,
dp
,
greedy
,
two pointers
1600
x5628
2028B
Alice's Adventures in Permuting
binary search
,
implementation
,
math
1400
x8214
2028A
Alice's Adventures in ''Chess''
brute force
,
implementation
,
math
900
x13406
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
x1275
2027D1
The Endspeaker (Easy Version)
binary search
,
dp
,
graphs
,
greedy
,
implementation
,
two pointers
1700
x4616
2027C
Add Zeros
brute force
,
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
1500
x8739
2027B
Stalin Sort
brute force
,
greedy
1100
x13421
2027A
Rectangle Arrangement
geometry
,
implementation
,
math
800
x18299
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
x1087
2026D
Sums of Segments
binary search
,
data structures
,
dp
,
implementation
,
math
1900
x3914
2026C
Action Figures
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
1500
x8492
2026B
Black Cells
binary search
,
brute force
,
constructive algorithms
,
greedy
1300
x11598
2026A
Perpendicular Segments
constructive algorithms
,
geometry
,
greedy
,
math
900
x15736
2025G
Variable Damage
data structures
,
flows
3000
x135
2025F
Choose Your Queries
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2700
x677
2025E
Card Game
combinatorics
,
dp
,
fft
,
greedy
,
math
2200
x1742
2025D
Attribute Checks
brute force
,
data structures
,
dp
,
implementation
,
math
,
two pointers
1800
x5856
2025C
New Game
binary search
,
brute force
,
greedy
,
implementation
,
sortings
,
two pointers
1300
x14389
2025B
Binomial Coefficients, Kind Of
combinatorics
,
dp
,
math
1100
x16360
2025A
Two Screens
binary search
,
greedy
,
strings
,
two pointers
800
x23342
2024B
Buying Lemonade
binary search
,
constructive algorithms
,
sortings
1100
x13004
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