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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
22:53:56
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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
x2817
2038K
Grid Walk
brute force
,
dp
,
greedy
,
math
,
number theory
2100
x798
2038F
Alternative Platforms
combinatorics
,
data structures
,
fft
,
math
,
sortings
2500
x284
2038E
Barrels
data structures
,
greedy
,
math
2900
x80
2038B
Make It Equal
binary search
,
brute force
,
greedy
,
math
2100
x953
2037G
Natlan Exploring
bitmasks
,
combinatorics
,
data structures
,
dp
,
math
,
number theory
2000
x1815
2037F
Ardent Flames
binary search
,
data structures
,
math
,
sortings
,
two pointers
2100
x1416
2037C
Superultra's Favorite Permutation
constructive algorithms
,
greedy
,
math
,
number theory
1000
x14460
2036G
Library of Magic
binary search
,
constructive algorithms
,
divide and conquer
,
interactive
,
math
,
number theory
2200
x1057
2035E
Monster
binary search
,
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
,
ternary search
2300
x1499
2035D
Yet Another Real Number Problem
binary search
,
data structures
,
divide and conquer
,
greedy
,
implementation
,
math
1800
x4391
2035C
Alya and Permutation
bitmasks
,
constructive algorithms
,
math
1400
x7910
2035B
Everyone Loves Tres
constructive algorithms
,
greedy
,
math
,
number theory
900
x14491
2035A
Sliding
implementation
,
math
800
x14724
2033F
Kosuke's Sloth
brute force
,
math
,
number theory
1800
x5184
2033E
Sakurako, Kosuke, and the Permutation
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
1400
x9815
2033D
Kousuke's Assignment
data structures
,
dp
,
dsu
,
greedy
,
math
1300
x12913
2033A
Sakurako and Kosuke
constructive algorithms
,
implementation
,
math
800
x32688
2032F
Peanuts
combinatorics
,
dp
,
games
,
math
2700
x259
2032E
Balanced
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
2400
x938
2032C
Trinity
binary search
,
math
,
sortings
,
two pointers
1400
x10973
2032B
Medians
constructive algorithms
,
greedy
,
implementation
,
math
1100
x15381
2032A
Circuit
greedy
,
implementation
,
math
,
number theory
800
x20071
2031E
Penchick and Chloe's Trees
data structures
,
dfs and similar
,
dp
,
greedy
,
implementation
,
math
,
sortings
,
trees
2100
x1540
2031C
Penchick and BBQ Buns
constructive algorithms
,
math
,
number theory
1300
x8915
2031A
Penchick and Modern Monument
constructive algorithms
,
dp
,
greedy
,
math
800
x14241
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
x1316
2030B
Minimise Oneness
combinatorics
,
constructive algorithms
,
games
,
math
800
x19967
2030A
A Gift From Orangutan
constructive algorithms
,
greedy
,
math
,
sortings
800
x23304
2029E
Common Generator
brute force
,
constructive algorithms
,
math
,
number theory
2100
x2351
2029A
Set
greedy
,
math
800
x10796
2028E
Alice's Adventures in the Rabbit Hole
combinatorics
,
dfs and similar
,
dp
,
games
,
greedy
,
math
,
probabilities
,
trees
2300
x1083
2028B
Alice's Adventures in Permuting
binary search
,
implementation
,
math
1400
x8332
2028A
Alice's Adventures in ''Chess''
brute force
,
implementation
,
math
900
x13570
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
x18388
2026D
Sums of Segments
binary search
,
data structures
,
dp
,
implementation
,
math
1900
x3935
2026A
Perpendicular Segments
constructive algorithms
,
geometry
,
greedy
,
math
900
x15799
2025E
Card Game
combinatorics
,
dp
,
fft
,
greedy
,
math
2200
x1748
2025D
Attribute Checks
brute force
,
data structures
,
dp
,
implementation
,
math
,
two pointers
1800
x5868
2025B
Binomial Coefficients, Kind Of
combinatorics
,
dp
,
math
1100
x16384
2024A
Profitable Interest Rate
greedy
,
math
800
x18726
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
x11901
2022B
Kar Salesman
binary search
,
greedy
,
math
1300
x9886
2022A
Bus to Pénjamo
constructive algorithms
,
greedy
,
implementation
,
math
800
x13692
2021E3
Digital Village (Extreme Version)
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
,
greedy
,
math
,
trees
2800
x427
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
x1480
2021B
Maximize Mex
brute force
,
greedy
,
math
,
number theory
1200
x14253
2021A
Meaning Mean
data structures
,
greedy
,
math
,
sortings
800
x18536
2020F
Count Leaves
dp
,
math
,
number theory
2900
x194
2020E
Expected Power
bitmasks
,
dp
,
math
,
probabilities
2000
x2985
2020D
Connect the Dots
brute force
,
dp
,
dsu
,
graphs
,
math
,
trees
1800
x5662
2020C
Bitwise Balancing
bitmasks
,
hashing
,
implementation
,
math
,
schedules
,
ternary search
1400
x14376
2020B
Brightness Begins
binary search
,
math
1200
x16324
2020A
Find Minimum Operations
bitmasks
,
brute force
,
greedy
,
math
,
number theory
800
x21816
2019B
All Pairs Segments
implementation
,
math
1200
x13805
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
x10119
2014C
Robin Hood in Town
binary search
,
greedy
,
math
1100
x21495
2014B
Robin Hood and the Major Oak
math
800
x28178
2013E
Prefix GCD
brute force
,
dp
,
greedy
,
math
,
number theory
2200
x3189
2013B
Battle for Survive
constructive algorithms
,
greedy
,
math
900
x22913
2013A
Zhan's Blender
constructive algorithms
,
math
800
x27067
2010B
Three Brothers
brute force
,
implementation
,
math
800
x19779
2010A
Alternating Sum of Numbers
brute force
,
implementation
,
math
800
x16748
2009F
Firefly's Queries
bitmasks
,
data structures
,
flows
,
math
1700
x6512
2009E
Klee's SUPER DUPER LARGE Array!!!
binary search
,
math
,
ternary search
1400
x13183
2009D
Satyam and Counting
geometry
,
math
1400
x14302
2009C
The Legend of Freya the Frog
implementation
,
math
1100
x25743
2009A
Minimize!
brute force
,
math
800
x51067
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
x5150
2008F
Sakurako's Box
combinatorics
,
math
,
number theory
1400
x12488
2008D
Sakurako's Hobby
dp
,
dsu
,
graphs
,
math
1100
x19112
2008C
Longest Good Array
binary search
,
brute force
,
math
800
x30274
2008B
Square or Not
brute force
,
math
,
strings
800
x28463
2008A
Sakurako's Exam
brute force
,
constructive algorithms
,
greedy
,
math
800
x35144
2007C
Dora and C++
math
,
number theory
1500
x12214
2007A
Dora's Set
greedy
,
math
,
number theory
800
x22618
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
x1639
2006B
Iris and the Tree
brute force
,
data structures
,
dfs and similar
,
dsu
,
math
,
trees
1800
x3328
2005B2
The Strict Teacher (Hard Version)
binary search
,
greedy
,
math
,
sortings
1200
x17226
2005B1
The Strict Teacher (Easy Version)
greedy
,
math
,
sortings
1000
x19920
2005A
Simple Palindrome
combinatorics
,
constructive algorithms
,
greedy
,
math
900
x21629
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
x4055
2004A
Closest Point
implementation
,
math
800
x30260
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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