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Rayan Programming Contest 2024 - Selection (Codeforces Round, Div. 1 + Div. 2)
5 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
1719A
Chip Game
games
,
math
800
x25673
1717B
Madoka and Underground Competitions
constructive algorithms
,
implementation
1100
x14881
1717A
Madoka and Strange Thoughts
math
,
number theory
800
x19582
1716B
Permutation Chain
constructive algorithms
,
math
800
x21466
1716A
2-3 Moves
greedy
,
math
800
x33185
1715B
Beautiful Array
constructive algorithms
,
greedy
,
math
1000
x22336
1715A
Crossmarket
constructive algorithms
,
greedy
,
math
800
x23607
1714C
Minimum Varied Number
greedy
800
x31218
1714B
Remove Prefix
data structures
,
greedy
,
implementation
800
x30668
1714A
Everyone Loves to Sleep
implementation
,
math
900
x29948
1713C
Build Permutation
constructive algorithms
,
dp
,
math
1200
x17495
1713B
Optimal Reduction
constructive algorithms
,
sortings
1000
x21425
1713A
Traveling Salesman Problem
geometry
,
greedy
,
implementation
800
x22045
1712C
Sort Zero
greedy
,
sortings
1100
x19953
1712B
Woeful Permutation
constructive algorithms
,
greedy
,
number theory
800
x21675
1712A
Wonderful Permutation
greedy
,
implementation
800
x24162
1711A
Perfect Permutation
constructive algorithms
800
x25268
1709B
Also Try Minecraft
data structures
,
dp
,
implementation
900
x22965
1709A
Three Doors
brute force
,
greedy
,
implementation
,
math
800
x29747
1708B
Difference of GCDs
constructive algorithms
,
math
1100
x21046
1708A
Difference Operations
greedy
,
math
800
x21839
1706B
Making Towers
dp
,
greedy
,
math
1100
x16632
1706A
Another String Minimization Problem
2-sat
,
constructive algorithms
,
greedy
,
string suffix structures
,
strings
800
x23057
1705B
Mark the Dust Sweeper
constructive algorithms
,
greedy
,
implementation
900
x23142
1705A
Mark the Photographer
greedy
,
sortings
800
x25350
1704C
Virus
greedy
,
implementation
,
sortings
1200
x16191
1704B
Luke is a Foodie
brute force
,
greedy
,
implementation
1000
x18536
1704A
Two 0-1 Sequences
constructive algorithms
,
greedy
800
x16062
1703E
Mirror Grid
implementation
1200
x18753
1703D
Double Strings
brute force
,
data structures
,
strings
1100
x25945
1703C
Cypher
brute force
,
implementation
,
strings
800
x36008
1703B
ICPC Balloons
data structures
,
implementation
800
x50318
1703A
YES or YES?
brute force
,
implementation
,
strings
800
x71666
1702D
Not a Cheap String
greedy
1000
x23865
1702C
Train and Queries
data structures
,
greedy
1100
x22638
1702B
Polycarp Writes a String from Memory
greedy
800
x27788
1702A
Round Down the Price
constructive algorithms
800
x35100
1701B
Permutation
greedy
800
x20245
1701A
Grass Field
implementation
800
x26443
1700B
Palindromic Numbers
constructive algorithms
,
implementation
,
math
1100
x18853
1700A
Optimal Path
constructive algorithms
,
greedy
,
math
800
x22954
1699B
Almost Ternary Matrix
bitmasks
,
constructive algorithms
,
matrices
900
x19897
1699A
The Third Three Number Problem
constructive algorithms
,
math
800
x24085
1698B
Rising Sand
constructive algorithms
,
greedy
,
implementation
800
x20990
1698A
XOR Mixup
bitmasks
,
brute force
800
x29425
1697B
Promo
greedy
,
sortings
900
x26976
1697A
Parkway Walk
greedy
,
implementation
800
x25809
1696B
NIT Destroys the Universe
greedy
900
x21917
1696A
NIT orz!
bitmasks
,
greedy
800
x18883
1695B
Circle Game
games
,
greedy
1000
x18593
1695A
Subrectangle Guess
games
800
x16386
1694B
Paranoid String
constructive algorithms
,
greedy
1200
x19260
1694A
Creep
greedy
,
implementation
800
x22730
1692E
Binary Deque
binary search
,
implementation
,
two pointers
1200
x22596
1692D
The Clock
brute force
,
implementation
1100
x19605
1692C
Where's the Bishop?
implementation
800
x34611
1692B
All Distinct
greedy
,
sortings
800
x34584
1692A
Marathon
implementation
800
x66810
1691B
Shoe Shuffling
constructive algorithms
,
greedy
,
implementation
,
two pointers
1000
x23559
1691A
Beat The Odds
brute force
,
greedy
,
math
800
x30689
1690D
Black and White Stripe
implementation
,
two pointers
1000
x30542
1690C
Restoring the Duration of Tasks
data structures
,
greedy
,
implementation
800
x26317
1690B
Array Decrements
greedy
,
implementation
800
x25549
1690A
Print a Pedestal (Codeforces logo?)
constructive algorithms
,
greedy
800
x33731
1689B
Mystic Permutation
data structures
,
greedy
900
x17623
1689A
Lex String
brute force
,
greedy
,
implementation
,
sortings
,
two pointers
800
x16840
1688B
Patchouli's Magical Talisman
bitmasks
,
constructive algorithms
,
greedy
,
sortings
800
x18338
1688A
Cirno's Perfect Bitmasks Classroom
bitmasks
,
brute force
800
x21790
1686B
Odd Subarrays
dp
,
greedy
800
x18343
1686A
Everything Everywhere All But One
greedy
800
x20524
1685A
Circular Local MiniMax
constructive algorithms
,
greedy
,
sortings
1100
x17232
1684B
Z mod X = C
constructive algorithms
,
math
800
x21061
1684A
Digit Minimization
constructive algorithms
,
games
,
math
,
strings
800
x23992
1682B
AND Sorting
bitmasks
,
constructive algorithms
,
sortings
1100
x18912
1682A
Palindromic Indices
greedy
,
strings
800
x19331
1681C
Double Sort
implementation
,
sortings
1200
x17475
1681B
Card Trick
implementation
,
math
800
x20176
1681A
Game with Cards
games
,
greedy
800
x21055
1680B
Robots
implementation
800
x18447
1680A
Minimums and Maximums
brute force
,
math
800
x21656
1679B
Stone Age Problem
data structures
,
implementation
1200
x18917
1679A
AvtoBus
brute force
,
greedy
,
math
,
number theory
900
x24847
1678B1
Tokitsukaze and Good 01-String (easy version)
implementation
800
x15982
1678A
Tokitsukaze and All Zero Sequence
implementation
800
x18235
1676E
Eating Queries
binary search
,
greedy
,
sortings
1100
x26984
1676D
X-Sum
brute force
,
greedy
,
implementation
1000
x25504
1676C
Most Similar Words
brute force
,
greedy
,
implementation
,
implementation
,
math
,
strings
800
x30457
1676B
Equal Candies
greedy
,
math
,
sortings
800
x49343
1676A
Lucky?
implementation
800
x65643
1675C
Detective Task
implementation
1100
x18338
1675B
Make It Increasing
greedy
,
implementation
900
x27756
1675A
Food for Animals
greedy
,
math
800
x33523
1674D
A-B-C Sort
constructive algorithms
,
implementation
,
sortings
1200
x16491
1674C
Infinite Replacement
combinatorics
,
implementation
,
strings
1000
x23814
1674B
Dictionary
combinatorics
,
math
800
x26563
1674A
Number Transformation
constructive algorithms
,
math
800
x26439
1673B
A Perfectly Balanced String?
brute force
,
greedy
,
strings
1100
x15441
1673A
Subtle Substring Subtraction
games
,
greedy
,
strings
800
x18479
1672C
Unequal Array
constructive algorithms
,
greedy
,
implementation
1100
x13295
1672B
I love AAAB
constructive algorithms
,
implementation
800
x15902
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