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CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!)
28:10:05
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math
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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Custom test
Problems
#
Name
1738C
Even Number Addicts
dp
,
games
,
greedy
,
math
1500
x10344
1738B
Prefix Sum Addicts
constructive algorithms
,
greedy
,
math
,
sortings
1200
x14576
1737F
Ela and Prime GCD
constructive algorithms
,
math
,
number theory
3300
x114
1737E
Ela Goes Hiking
combinatorics
,
dp
,
math
,
probabilities
2500
x879
1737C
Ela and Crickets
constructive algorithms
,
games
,
implementation
,
math
1500
x5496
1737B
Ela's Fitness and the Luxury Number
binary search
,
implementation
,
math
1300
x9111
1736B
Playing with GCD
math
,
number theory
1200
x17007
1735D
Meta-set
brute force
,
combinatorics
,
data structures
,
hashing
,
math
1700
x5204
1735B
Tea with Tangerines
greedy
,
math
900
x17562
1735A
Working Week
constructive algorithms
,
greedy
,
math
800
x19780
1734F
Zeros and Ones
bitmasks
,
divide and conquer
,
dp
,
math
2500
x759
1734C
Removing Smallest Multiples
greedy
,
math
1200
x16448
1733E
Conveyor
constructive algorithms
,
dp
,
math
2700
x1070
1733D1
Zero-One (Easy Version)
constructive algorithms
,
greedy
,
math
1400
x12692
1733B
Rule of League
constructive algorithms
,
math
900
x19100
1732E
Location
data structures
,
dp
,
math
,
number theory
2800
x401
1732A
Bestie
brute force
,
combinatorics
,
constructive algorithms
,
implementation
,
math
,
number theory
1000
x14294
1731F
Function Sum
brute force
,
combinatorics
,
dp
,
fft
,
math
2500
x648
1731E
Graph Cost
dp
,
greedy
,
math
,
number theory
2000
x2597
1731C
Even Subarrays
bitmasks
,
brute force
,
hashing
,
math
,
number theory
1700
x8776
1731B
Kill Demodogs
greedy
,
math
1100
x16447
1731A
Joey Takes Money
greedy
,
math
800
x22060
1730C
Minimum Notation
data structures
,
greedy
,
math
,
sortings
1200
x15879
1730B
Meeting on the Line
binary search
,
geometry
,
greedy
,
implementation
,
math
,
ternary search
1600
x11617
1729F
Kirei and the Linear Function
hashing
,
math
1900
x3938
1729A
Two Elevators
math
800
x38257
1728G
Illumination
binary search
,
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
,
two pointers
2700
x386
1728E
Red-Black Pepper
brute force
,
data structures
,
greedy
,
math
,
number theory
2300
x1630
1726H
Mainak and the Bleeding Polygon
binary search
,
geometry
,
implementation
,
math
3500
x78
1726E
Almost Perfect
combinatorics
,
fft
,
math
2400
x1329
1726B
Mainak and Interesting Sequence
bitmasks
,
constructive algorithms
,
math
1100
x14531
1726A
Mainak and Array
greedy
,
math
900
x19162
1725H
Hot Black Hot White
constructive algorithms
,
math
1800
x2463
1725G
Garage
binary search
,
geometry
,
math
1500
x5519
1725E
Electrical Efficiency
combinatorics
,
data structures
,
dp
,
math
,
number theory
,
trees
2500
x425
1725D
Deducing Sortability
binary search
,
bitmasks
,
math
2900
x115
1725C
Circular Mirror
binary search
,
combinatorics
,
geometry
,
math
,
two pointers
2000
x1519
1725A
Accumulation of Dominoes
math
800
x9034
1720E
Misha and Paintings
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
2700
x729
1720B
Interesting Sum
brute force
,
data structures
,
greedy
,
math
,
sortings
800
x20655
1720A
Burenka Plays with Fractions
math
,
number theory
900
x21535
1719B
Mathematical Circus
constructive algorithms
,
math
800
x18242
1719A
Chip Game
games
,
math
800
x24857
1718F
Burenka, an Array and Queries
data structures
,
math
,
number theory
3300
x141
1718E
Impressionism
constructive algorithms
,
graphs
,
implementation
,
math
3500
x101
1718D
Permutation for Burenka
data structures
,
graph matchings
,
greedy
,
math
,
trees
3300
x283
1718C
Tonya and Burenka-179
data structures
,
greedy
,
math
,
number theory
2400
x1496
1718B
Fibonacci Strings
greedy
,
implementation
,
math
,
number theory
2000
x2839
1717E
Madoka and The Best University
math
,
number theory
2200
x2430
1717D
Madoka and The Corruption Scheme
combinatorics
,
constructive algorithms
,
greedy
,
math
1900
x4207
1717A
Madoka and Strange Thoughts
math
,
number theory
800
x19047
1716F
Bags with Balls
combinatorics
,
dp
,
math
,
number theory
2500
x986
1716D
Chip Move
brute force
,
dp
,
math
2000
x4909
1716B
Permutation Chain
constructive algorithms
,
math
800
x21124
1716A
2-3 Moves
greedy
,
math
800
x31044
1715F
Crop Squares
constructive algorithms
,
geometry
,
interactive
,
math
2700
x494
1715C
Monoblock
combinatorics
,
data structures
,
implementation
,
math
1700
x8240
1715B
Beautiful Array
constructive algorithms
,
greedy
,
math
1000
x19672
1715A
Crossmarket
constructive algorithms
,
greedy
,
math
800
x23094
1714E
Add Modulo 10
brute force
,
math
,
number theory
1400
x14930
1714A
Everyone Loves to Sleep
implementation
,
math
900
x28142
1713F
Lost Array
bitmasks
,
combinatorics
,
constructive algorithms
,
dp
,
math
2900
x499
1713C
Build Permutation
constructive algorithms
,
dp
,
math
1200
x16671
1712E2
LCM Sum (hard version)
brute force
,
data structures
,
math
,
number theory
,
two pointers
2500
x1172
1712E1
LCM Sum (easy version)
binary search
,
brute force
,
combinatorics
,
math
,
number theory
,
two pointers
2300
x2019
1710C
XOR Triangle
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
greedy
,
math
2500
x1263
1710B
Rain
binary search
,
brute force
,
data structures
,
geometry
,
greedy
,
implementation
,
math
2100
x2334
1710A
Color the Picture
constructive algorithms
,
greedy
,
math
1500
x10516
1709F
Multiset of Strings
bitmasks
,
brute force
,
dp
,
fft
,
flows
,
graphs
,
math
,
meet-in-the-middle
,
trees
2500
x520
1709D
Rorororobot
binary search
,
data structures
,
greedy
,
math
1700
x7977
1709A
Three Doors
brute force
,
greedy
,
implementation
,
math
800
x28798
1708B
Difference of GCDs
constructive algorithms
,
math
1100
x19214
1708A
Difference Operations
greedy
,
math
800
x21408
1707D
Partial Virtual Trees
combinatorics
,
dfs and similar
,
dp
,
math
,
trees
3000
x550
1706D2
Chopping Carrots (Hard Version)
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
2400
x1639
1706B
Making Towers
dp
,
greedy
,
math
1100
x16122
1705D
Mark and Lightbulbs
combinatorics
,
constructive algorithms
,
greedy
,
math
,
sortings
1800
x6039
1704H2
Game of AI (hard version)
combinatorics
,
fft
,
math
3500
x70
1704H1
Game of AI (easy version)
combinatorics
,
constructive algorithms
,
dp
,
fft
,
math
3200
x166
1704G
Mio and Lucky Array
constructive algorithms
,
fft
,
math
,
strings
3500
x94
1704E
Count Seconds
brute force
,
constructive algorithms
,
dp
,
graphs
,
implementation
,
math
2200
x2196
1704D
Magical Array
constructive algorithms
,
hashing
,
implementation
,
math
1900
x4788
1703G
Good Key, Bad Key
bitmasks
,
brute force
,
dp
,
greedy
,
math
1600
x9801
1702F
Equate Multisets
constructive algorithms
,
data structures
,
greedy
,
math
,
number theory
1700
x7814
1701F
Points
combinatorics
,
data structures
,
implementation
,
math
,
matrices
2500
x875
1701D
Permutation Restoration
binary search
,
data structures
,
greedy
,
math
,
sortings
,
two pointers
1900
x5412
1700D
River Locks
binary search
,
dp
,
greedy
,
math
1900
x5771
1700B
Palindromic Numbers
constructive algorithms
,
implementation
,
math
1100
x18165
1700A
Optimal Path
constructive algorithms
,
greedy
,
math
800
x22477
1699E
Three Days Grace
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
2600
x1065
1699C
The Third Problem
combinatorics
,
constructive algorithms
,
math
1700
x9288
1699A
The Third Three Number Problem
constructive algorithms
,
math
800
x23558
1698G
Long Binary String
bitmasks
,
math
,
matrices
,
meet-in-the-middle
,
number theory
2900
x297
1698F
Equal Reversal
constructive algorithms
,
graphs
,
implementation
,
math
2800
x546
1697E
Coloring
brute force
,
combinatorics
,
constructive algorithms
,
dp
,
geometry
,
graphs
,
greedy
,
implementation
,
math
2400
x1123
1696H
Maximum Product?
brute force
,
combinatorics
,
dp
,
greedy
,
implementation
,
math
,
two pointers
3500
x135
1696G
Fishingprince Plays With Array Again
brute force
,
data structures
,
geometry
,
math
3300
x262
1696E
Placing Jinas
combinatorics
,
math
2000
x3788
1696C
Fishingprince Plays With Array
constructive algorithms
,
greedy
,
implementation
,
math
1400
x11222
1692H
Gambling
data structures
,
dp
,
greedy
,
math
1700
x6931
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