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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
28:18:19
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math
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
2038L
Bridge Renovation
brute force
,
dp
,
greedy
,
math
,
two pointers
1400
x2750
2038K
Grid Walk
brute force
,
dp
,
greedy
,
math
,
number theory
2100
x775
2038F
Alternative Platforms
combinatorics
,
data structures
,
fft
,
math
,
sortings
2500
x283
2038E
Barrels
data structures
,
greedy
,
math
2900
x78
2038B
Make It Equal
binary search
,
brute force
,
greedy
,
math
2100
x937
2037G
Natlan Exploring
bitmasks
,
combinatorics
,
data structures
,
dp
,
math
,
number theory
2000
x1787
2037F
Ardent Flames
binary search
,
data structures
,
math
,
sortings
,
two pointers
2100
x1393
2037C
Superultra's Favorite Permutation
constructive algorithms
,
greedy
,
math
,
number theory
1000
x14328
2036G
Library of Magic
binary search
,
constructive algorithms
,
divide and conquer
,
interactive
,
math
,
number theory
2200
x1052
2035E
Monster
binary search
,
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
,
ternary search
2300
x1498
2035D
Yet Another Real Number Problem
binary search
,
data structures
,
divide and conquer
,
greedy
,
implementation
,
math
1800
x4382
2035C
Alya and Permutation
bitmasks
,
constructive algorithms
,
math
1400
x7899
2035B
Everyone Loves Tres
constructive algorithms
,
greedy
,
math
,
number theory
900
x14476
2035A
Sliding
implementation
,
math
800
x14711
2033F
Kosuke's Sloth
brute force
,
math
,
number theory
1800
x5181
2033E
Sakurako, Kosuke, and the Permutation
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
1400
x9809
2033D
Kousuke's Assignment
data structures
,
dp
,
dsu
,
greedy
,
math
1300
x12908
2033A
Sakurako and Kosuke
constructive algorithms
,
implementation
,
math
800
x32666
2032F
Peanuts
combinatorics
,
dp
,
games
,
math
2700
x258
2032E
Balanced
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
2400
x933
2032C
Trinity
binary search
,
math
,
sortings
,
two pointers
1400
x10964
2032B
Medians
constructive algorithms
,
greedy
,
implementation
,
math
1100
x15365
2032A
Circuit
greedy
,
implementation
,
math
,
number theory
800
x20052
2031E
Penchick and Chloe's Trees
data structures
,
dfs and similar
,
dp
,
greedy
,
implementation
,
math
,
sortings
,
trees
2100
x1528
2031C
Penchick and BBQ Buns
constructive algorithms
,
math
,
number theory
1300
x8877
2031A
Penchick and Modern Monument
constructive algorithms
,
dp
,
greedy
,
math
800
x14177
2030G2
The Destruction of the Universe (Hard Version)
combinatorics
,
math
3100
x109
2030G1
The Destruction of the Universe (Easy Version)
combinatorics
,
greedy
,
math
2900
x147
2030E
MEXimize the Score
combinatorics
,
data structures
,
dp
,
greedy
,
implementation
,
math
2200
x1312
2030B
Minimise Oneness
combinatorics
,
constructive algorithms
,
games
,
math
800
x19948
2030A
A Gift From Orangutan
constructive algorithms
,
greedy
,
math
,
sortings
800
x23287
2029E
Common Generator
brute force
,
constructive algorithms
,
math
,
number theory
2100
x2344
2029A
Set
greedy
,
math
800
x10775
2028E
Alice's Adventures in the Rabbit Hole
combinatorics
,
dfs and similar
,
dp
,
games
,
greedy
,
math
,
probabilities
,
trees
2300
x1079
2028B
Alice's Adventures in Permuting
binary search
,
implementation
,
math
1400
x8296
2028A
Alice's Adventures in ''Chess''
brute force
,
implementation
,
math
900
x13525
2027E2
Bit Game (Hard Version)
bitmasks
,
dp
,
math
3100
x48
2027E1
Bit Game (Easy Version)
bitmasks
,
brute force
,
games
,
math
2800
x126
2027A
Rectangle Arrangement
geometry
,
implementation
,
math
800
x18373
2026D
Sums of Segments
binary search
,
data structures
,
dp
,
implementation
,
math
1900
x3931
2026A
Perpendicular Segments
constructive algorithms
,
geometry
,
greedy
,
math
900
x15782
2025E
Card Game
combinatorics
,
dp
,
fft
,
greedy
,
math
2200
x1747
2025D
Attribute Checks
brute force
,
data structures
,
dp
,
implementation
,
math
,
two pointers
1800
x5866
2025B
Binomial Coefficients, Kind Of
combinatorics
,
dp
,
math
1100
x16381
2024A
Profitable Interest Rate
greedy
,
math
800
x18717
2023F
Hills and Pits
data structures
,
greedy
,
math
,
matrices
3500
x58
2023D
Many Games
brute force
,
dp
,
greedy
,
math
,
probabilities
2900
x401
2023A
Concatenation of Arrays
constructive algorithms
,
greedy
,
math
,
sortings
1300
x11893
2022B
Kar Salesman
binary search
,
greedy
,
math
1300
x9880
2022A
Bus to Pénjamo
constructive algorithms
,
greedy
,
implementation
,
math
800
x13683
2021E3
Digital Village (Extreme Version)
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
,
greedy
,
math
,
trees
2800
x426
2021E2
Digital Village (Hard Version)
data structures
,
dp
,
dsu
,
graphs
,
math
,
trees
2500
x817
2021E1
Digital Village (Easy Version)
brute force
,
data structures
,
dfs and similar
,
dp
,
dsu
,
fft
,
graphs
,
greedy
,
implementation
,
math
,
trees
2300
x1479
2021B
Maximize Mex
brute force
,
greedy
,
math
,
number theory
1200
x14249
2021A
Meaning Mean
data structures
,
greedy
,
math
,
sortings
800
x18532
2020F
Count Leaves
dp
,
math
,
number theory
2900
x194
2020E
Expected Power
bitmasks
,
dp
,
math
,
probabilities
2000
x2983
2020D
Connect the Dots
brute force
,
dp
,
dsu
,
graphs
,
math
,
trees
1800
x5660
2020C
Bitwise Balancing
bitmasks
,
hashing
,
implementation
,
math
,
schedules
,
ternary search
1400
x14373
2020B
Brightness Begins
binary search
,
math
1200
x16318
2020A
Find Minimum Operations
bitmasks
,
brute force
,
greedy
,
math
,
number theory
800
x21811
2019B
All Pairs Segments
implementation
,
math
1200
x13801
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
x148
2018A
Cards Partition
2-sat
,
brute force
,
greedy
,
implementation
,
math
1600
x10116
2014C
Robin Hood in Town
binary search
,
greedy
,
math
1100
x21491
2014B
Robin Hood and the Major Oak
math
800
x28169
2013E
Prefix GCD
brute force
,
dp
,
greedy
,
math
,
number theory
2200
x3187
2013B
Battle for Survive
constructive algorithms
,
greedy
,
math
900
x22909
2013A
Zhan's Blender
constructive algorithms
,
math
800
x27063
2010B
Three Brothers
brute force
,
implementation
,
math
800
x19770
2010A
Alternating Sum of Numbers
brute force
,
implementation
,
math
800
x16743
2009F
Firefly's Queries
bitmasks
,
data structures
,
flows
,
math
1700
x6507
2009E
Klee's SUPER DUPER LARGE Array!!!
binary search
,
math
,
ternary search
1400
x13177
2009D
Satyam and Counting
geometry
,
math
1400
x14297
2009C
The Legend of Freya the Frog
implementation
,
math
1100
x25733
2009A
Minimize!
brute force
,
math
800
x50972
2008H
Sakurako's Test
binary search
,
brute force
,
greedy
,
math
,
number theory
2100
x2907
2008G
Sakurako's Task
binary search
,
greedy
,
math
,
number theory
1800
x5148
2008F
Sakurako's Box
combinatorics
,
math
,
number theory
1400
x12487
2008D
Sakurako's Hobby
dp
,
dsu
,
graphs
,
math
1100
x19105
2008C
Longest Good Array
binary search
,
brute force
,
math
800
x30266
2008B
Square or Not
brute force
,
math
,
strings
800
x28459
2008A
Sakurako's Exam
brute force
,
constructive algorithms
,
greedy
,
math
800
x35140
2007C
Dora and C++
math
,
number theory
1500
x12213
2007A
Dora's Set
greedy
,
math
,
number theory
800
x22617
2006D
Iris and Adjacent Products
data structures
,
greedy
,
implementation
,
math
2600
x673
2006C
Eri and Expanded Sets
data structures
,
divide and conquer
,
math
,
number theory
,
two pointers
2300
x1637
2006B
Iris and the Tree
brute force
,
data structures
,
dfs and similar
,
dsu
,
math
,
trees
1800
x3325
2005B2
The Strict Teacher (Hard Version)
binary search
,
greedy
,
math
,
sortings
1200
x17215
2005B1
The Strict Teacher (Easy Version)
greedy
,
math
,
sortings
1000
x19911
2005A
Simple Palindrome
combinatorics
,
constructive algorithms
,
greedy
,
math
900
x21626
2004F
Make a Palindrome
binary search
,
brute force
,
data structures
,
greedy
,
math
2600
x1175
2004E
Not a Nim Problem
brute force
,
games
,
math
,
number theory
2100
x4053
2004A
Closest Point
implementation
,
math
800
x30259
2003F
Turtle and Three Sequences
brute force
,
data structures
,
dp
,
greedy
,
math
,
probabilities
,
two pointers
2800
x481
2003E2
Turtle and Inversions (Hard Version)
brute force
,
data structures
,
divide and conquer
,
dp
,
greedy
,
math
,
two pointers
2700
x520
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