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Rayan
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Rayan Programming Contest 2024 - Selection (Codeforces Round, Div. 1 + Div. 2)
4 days
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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
1699B
Almost Ternary Matrix
bitmasks
,
constructive algorithms
,
matrices
900
x19899
1699A
The Third Three Number Problem
constructive algorithms
,
math
800
x24087
1698B
Rising Sand
constructive algorithms
,
greedy
,
implementation
800
x20991
1698A
XOR Mixup
bitmasks
,
brute force
800
x29429
1697B
Promo
greedy
,
sortings
900
x26982
1697A
Parkway Walk
greedy
,
implementation
800
x25811
1696B
NIT Destroys the Universe
greedy
900
x21928
1696A
NIT orz!
bitmasks
,
greedy
800
x18893
1695A
Subrectangle Guess
games
800
x16392
1694A
Creep
greedy
,
implementation
800
x22749
1692C
Where's the Bishop?
implementation
800
x34615
1692B
All Distinct
greedy
,
sortings
800
x34591
1692A
Marathon
implementation
800
x66833
1691A
Beat The Odds
brute force
,
greedy
,
math
800
x30693
1690C
Restoring the Duration of Tasks
data structures
,
greedy
,
implementation
800
x26321
1690B
Array Decrements
greedy
,
implementation
800
x25556
1690A
Print a Pedestal (Codeforces logo?)
constructive algorithms
,
greedy
800
x33742
1689B
Mystic Permutation
data structures
,
greedy
900
x17625
1689A
Lex String
brute force
,
greedy
,
implementation
,
sortings
,
two pointers
800
x16843
1688B
Patchouli's Magical Talisman
bitmasks
,
constructive algorithms
,
greedy
,
sortings
800
x18339
1688A
Cirno's Perfect Bitmasks Classroom
bitmasks
,
brute force
800
x21792
1686B
Odd Subarrays
dp
,
greedy
800
x18345
1686A
Everything Everywhere All But One
greedy
800
x20525
1684B
Z mod X = C
constructive algorithms
,
math
800
x21065
1684A
Digit Minimization
constructive algorithms
,
games
,
math
,
strings
800
x23997
1682A
Palindromic Indices
greedy
,
strings
800
x19332
1681B
Card Trick
implementation
,
math
800
x20179
1681A
Game with Cards
games
,
greedy
800
x21055
1680B
Robots
implementation
800
x18448
1680A
Minimums and Maximums
brute force
,
math
800
x21659
1679A
AvtoBus
brute force
,
greedy
,
math
,
number theory
900
x24855
1678B1
Tokitsukaze and Good 01-String (easy version)
implementation
800
x15985
1678A
Tokitsukaze and All Zero Sequence
implementation
800
x18238
1676C
Most Similar Words
brute force
,
greedy
,
implementation
,
implementation
,
math
,
strings
800
x30465
1676B
Equal Candies
greedy
,
math
,
sortings
800
x49382
1676A
Lucky?
implementation
800
x65693
1675B
Make It Increasing
greedy
,
implementation
900
x27761
1675A
Food for Animals
greedy
,
math
800
x33527
1674B
Dictionary
combinatorics
,
math
800
x26567
1674A
Number Transformation
constructive algorithms
,
math
800
x26442
1673A
Subtle Substring Subtraction
games
,
greedy
,
strings
800
x18480
1672B
I love AAAB
constructive algorithms
,
implementation
800
x15905
1672A
Log Chopping
games
,
implementation
,
math
800
x16164
1671A
String Building
implementation
800
x20582
1670A
Prof. Slim
greedy
,
implementation
,
sortings
800
x15475
1669C
Odd/Even Increments
greedy
,
greedy
,
implementation
,
math
800
x35303
1669B
Triple
implementation
,
sortings
800
x44239
1669A
Division?
implementation
800
x65103
1668B
Social Distance
greedy
,
math
,
sortings
900
x16782
1668A
Direction Change
implementation
,
math
800
x16359
1666D
Deletive Editing
greedy
900
x8928
1665B
Array Cloning Technique
constructive algorithms
,
greedy
,
sortings
900
x20876
1665A
GCD vs LCM
constructive algorithms
,
math
800
x23760
1661A
Array Balancing
greedy
,
math
800
x18431
1660B
Vlad and Candies
math
800
x28225
1660A
Vasya and Coins
greedy
,
math
800
x36274
1658B
Marin and Anti-coprime Permutation
combinatorics
,
math
,
number theory
800
x18665
1658A
Marin and Photoshoot
constructive algorithms
,
implementation
,
math
800
x20379
1657B
XY Sequence
greedy
800
x22922
1657A
Integer Moves
brute force
,
math
800
x24056
1656A
Good Pairs
math
,
sortings
800
x19725
1654B
Prefix Removals
strings
800
x15660
1654A
Maximum Cake Tastiness
brute force
,
greedy
,
implementation
,
sortings
800
x18705
1651B
Prove Him Wrong
constructive algorithms
,
greedy
800
x19702
1651A
Playoff
implementation
800
x25764
1650B
DIV + MOD
math
900
x27856
1650A
Deletions of Two Adjacent Letters
implementation
,
strings
800
x34922
1649A
Game
implementation
800
x15602
1647A
Madoka and Math Dad
implementation
,
math
800
x22842
1646B
Quality vs Quantity
brute force
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
800
x21284
1646A
Square Counting
math
800
x24375
1644B
Anti-Fibonacci Permutation
brute force
,
constructive algorithms
,
implementation
800
x20745
1644A
Doors and Keys
implementation
800
x27458
1642B
Power Walking
greedy
900
x17041
1642A
Hard Way
geometry
800
x16246
1638A
Reverse
constructive algorithms
,
greedy
,
math
800
x21522
1637A
Sorting Parts
brute force
,
sortings
800
x22418
1635B
Avoid Local Maximums
greedy
800
x17961
1635A
Min Or Sum
bitmasks
,
greedy
800
x23075
1634A
Reverse and Concatenate
greedy
,
strings
800
x23961
1633B
Minority
greedy
800
x27914
1633A
Div. 7
brute force
800
x33494
1632A
ABC
implementation
800
x29598
1631A
Min Max Swap
greedy
800
x29600
1629B
GCD Arrays
greedy
,
math
,
number theory
800
x23579
1629A
Download More RAM
brute force
,
greedy
,
sortings
800
x29363
1627A
Not Shading
constructive algorithms
,
implementation
800
x24103
1626A
Equidistant Letters
constructive algorithms
,
sortings
800
x29076
1625A
Ancient Civilization
bitmasks
,
greedy
,
math
800
x17300
1624B
Make AP
implementation
,
math
900
x37507
1624A
Plus One on the Subset
math
800
x52667
1623A
Robot Cleaner
brute force
,
implementation
,
math
800
x20092
1622A
Construct a Rectangle
geometry
,
math
800
x30258
1621A
Stable Arrangement of Rooks
constructive algorithms
800
x23889
1620A
Equal or Not Equal
constructive algorithms
,
dsu
,
implementation
800
x21674
1619B
Squares and Cubes
implementation
,
math
800
x31049
1619A
Square String?
implementation
,
strings
800
x52710
1618B
Missing Bigram
implementation
800
x22762
1618A
Polycarp and Sums of Subsequences
math
,
sortings
800
x32508
1617B
GCD Problem
brute force
,
constructive algorithms
,
math
,
number theory
900
x23617
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