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Rayan
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Before contest
Rayan Programming Contest 2024 - Selection (Codeforces Round, Div. 1 + Div. 2)
5 days
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Difficulty:
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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
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Custom test
Problems
#
Name
1950C
Clock Conversion
implementation
,
math
800
x40235
1950B
Upscaling
implementation
800
x38359
1950A
Stair, Peak, or Neither?
implementation
800
x53781
1948A
Special Characters
brute force
,
constructive algorithms
800
x28775
1946A
Median of an Array
greedy
,
implementation
,
sortings
800
x26164
1945B
Fireworks
math
,
number theory
900
x22868
1945A
Setting up Camp
greedy
,
math
800
x27856
1944A
Destroying Bridges
graphs
,
greedy
,
math
800
x23911
1942A
Farmer John's Challenge
constructive algorithms
,
math
800
x17363
1941C
Rudolf and the Ugly String
dp
,
greedy
,
strings
900
x33657
1941A
Rudolf and the Ticket
brute force
,
math
800
x42754
1937A
Shuffle Party
implementation
,
math
800
x23277
1935A
Entertainment in MAC
constructive algorithms
,
strings
800
x28116
1934A
Too Min Too Max
greedy
,
math
800
x25561
1933B
Turtle Math: Fast Three Task
implementation
,
math
,
number theory
800
x33095
1933A
Turtle Puzzle: Rearrange and Negate
greedy
,
math
,
sortings
800
x38397
1932A
Thorns and Coins
dp
,
greedy
,
implementation
800
x29948
1931B
Make Equal
greedy
800
x32461
1931A
Recovering a Small String
brute force
,
strings
800
x36488
1930A
Maximise The Score
greedy
,
sortings
800
x18728
1929B
Sasha and the Drawing
constructive algorithms
,
greedy
,
math
800
x25445
1929A
Sasha and the Beautiful Array
constructive algorithms
,
greedy
,
math
,
sortings
800
x31786
1928A
Rectangle Cutting
geometry
,
math
800
x22844
1927B
Following the String
constructive algorithms
,
greedy
,
strings
900
x33662
1927A
Make it White
greedy
,
strings
800
x43997
1926B
Vlad and Shapes
geometry
,
implementation
800
x32825
1926A
Vlad and the Best of Five
implementation
800
x49210
1925A
We Got Everything Covered!
constructive algorithms
,
greedy
,
strings
800
x29028
1923A
Moving Chips
greedy
,
implementation
800
x24843
1922A
Tricky Template
constructive algorithms
,
implementation
,
strings
800
x27205
1921C
Sending Messages
greedy
,
math
900
x29623
1921B
Arranging Cats
greedy
,
implementation
800
x33995
1921A
Square
greedy
,
math
800
x43811
1920A
Satisfying Constraints
brute force
,
greedy
,
math
800
x27988
1919B
Plus-Minus Split
greedy
800
x29858
1919A
Wallet Exchange
games
,
math
800
x33573
1918B
Minimize Inversions
constructive algorithms
,
data structures
,
greedy
,
implementation
,
sortings
900
x24070
1918A
Brick Wall
constructive algorithms
,
greedy
,
implementation
,
math
800
x30418
1917A
Least Product
constructive algorithms
,
math
800
x25652
1916A
2023
constructive algorithms
,
implementation
,
math
,
number theory
800
x26182
1915D
Unnatural Language Processing
greedy
,
implementation
,
strings
900
x30690
1915C
Can I Square?
binary search
,
implementation
800
x43614
1915B
Not Quite Latin Square
bitmasks
,
brute force
,
implementation
800
x42892
1915A
Odd One Out
bitmasks
,
implementation
800
x58890
1914B
Preparing for the Contest
constructive algorithms
,
math
800
x30637
1914A
Problemsolving Log
implementation
,
strings
800
x32100
1913A
Rating Increase
implementation
800
x25386
1912L
LOL Lovers
strings
800
x7143
1909A
Distinct Buttons
implementation
,
math
800
x18026
1907A
Rook
implementation
800
x37151
1905A
Constructive Problems
constructive algorithms
,
math
800
x23118
1904A
Forked!
brute force
,
implementation
900
x20714
1903A
Halloumi Boxes
brute force
,
greedy
,
sortings
800
x34060
1902A
Binary Imbalance
constructive algorithms
800
x21300
1901A
Line Trip
greedy
,
math
800
x33989
1900B
Laura and Operations
dp
,
math
900
x17660
1900A
Cover in Water
constructive algorithms
,
greedy
,
implementation
,
strings
800
x29345
1899A
Game with Integers
games
,
math
,
number theory
800
x48231
1898A
Milica and String
brute force
,
implementation
,
strings
800
x16150
1896B
AB Flipping
greedy
,
strings
,
two pointers
900
x15087
1896A
Jagged Swaps
sortings
800
x25436
1895B
Points and Minimum Distance
greedy
,
math
,
sortings
800
x20556
1895A
Treasure Chest
math
800
x24551
1894A
Secret Sport
implementation
,
strings
800
x19075
1891A
Sorting with Twos
constructive algorithms
,
sortings
800
x19350
1890B
Qingshan Loves Strings
constructive algorithms
,
implementation
800
x17625
1890A
Doremy's Paint 3
constructive algorithms
800
x27936
1886A
Sum of Three
brute force
,
constructive algorithms
,
math
800
x26023
1884A
Simple Design
brute force
,
greedy
,
math
800
x17587
1883B
Chemistry
strings
900
x33498
1883A
Morning
math
800
x25936
1882A
Increasing Sequence
greedy
800
x25524
1881B
Three Threadlets
math
900
x25740
1881A
Don't Try to Count
brute force
,
strings
800
x33039
1879B
Chips on the Board
constructive algorithms
,
greedy
900
x22781
1879A
Rigged!
greedy
800
x23252
1878C
Vasilije in Cacak
math
900
x34045
1878B
Aleksa and Stack
constructive algorithms
,
math
800
x31672
1878A
How Much Does Daytona Cost?
greedy
800
x45935
1877A
Goals of Victory
math
800
x24560
1875A
Jellyfish and Undertale
brute force
,
greedy
900
x26522
1873D
1D Eraser
greedy
,
implementation
,
two pointers
800
x35784
1873C
Target Practice
implementation
,
math
800
x42051
1873B
Good Kid
brute force
,
greedy
,
math
800
x49906
1873A
Short Sort
brute force
,
implementation
800
x55568
1872B
The Corridor or There and Back Again
greedy
,
implementation
900
x28128
1872A
Two Vessels
brute force
,
greedy
,
math
800
x39502
1870A
MEXanized Array
constructive algorithms
,
greedy
,
math
800
x19143
1869A
Make It Zero
constructive algorithms
900
x22428
1867A
green_gold_dog, array and permutation
constructive algorithms
,
sortings
800
x20061
1866A
Ambitious Kid
math
800
x23360
1864A
Increasing and Decreasing
constructive algorithms
,
greedy
,
implementation
,
math
800
x20411
1863A
Channel
greedy
,
implementation
800
x17979
1862B
Sequence Game
constructive algorithms
800
x33114
1862A
Gift Carpet
dp
,
greedy
,
implementation
,
strings
800
x32761
1861A
Prime Deletion
constructive algorithms
,
math
800
x24032
1860A
Not a Substring
constructive algorithms
,
strings
900
x21856
1859A
United We Stand
constructive algorithms
,
math
,
number theory
800
x33570
1858A
Buttons
games
,
greedy
,
math
800
x39894
1857A
Array Coloring
greedy
,
math
800
x49713
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