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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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*has extra registration
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Difficulty:
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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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Problems
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Status
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Custom test
Problems
#
Name
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
1927A
Make it White
greedy
,
strings
800
x43997
1926B
Vlad and Shapes
geometry
,
implementation
800
x32824
1926A
Vlad and the Best of Five
implementation
800
x49201
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
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
1918A
Brick Wall
constructive algorithms
,
greedy
,
implementation
,
math
800
x30416
1917A
Least Product
constructive algorithms
,
math
800
x25652
1916A
2023
constructive algorithms
,
implementation
,
math
,
number theory
800
x26182
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
1903A
Halloumi Boxes
brute force
,
greedy
,
sortings
800
x34060
1902A
Binary Imbalance
constructive algorithms
800
x21300
1901A
Line Trip
greedy
,
math
800
x33989
1900A
Cover in Water
constructive algorithms
,
greedy
,
implementation
,
strings
800
x29344
1899A
Game with Integers
games
,
math
,
number theory
800
x48230
1898A
Milica and String
brute force
,
implementation
,
strings
800
x16150
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
1883A
Morning
math
800
x25936
1882A
Increasing Sequence
greedy
800
x25524
1881A
Don't Try to Count
brute force
,
strings
800
x33039
1879A
Rigged!
greedy
800
x23252
1878B
Aleksa and Stack
constructive algorithms
,
math
800
x31672
1878A
How Much Does Daytona Cost?
greedy
800
x45935
1877A
Goals of Victory
math
800
x24559
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
1872A
Two Vessels
brute force
,
greedy
,
math
800
x39501
1870A
MEXanized Array
constructive algorithms
,
greedy
,
math
800
x19143
1867A
green_gold_dog, array and permutation
constructive algorithms
,
sortings
800
x20061
1866A
Ambitious Kid
math
800
x23359
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
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
1856A
Tales of a Sort
implementation
800
x26710
1855A
Dalton the Teacher
greedy
,
math
800
x28265
1853A
Desorting
brute force
,
greedy
,
math
800
x32921
1851B
Parity Sort
greedy
,
sortings
,
two pointers
800
x29568
1851A
Escalator Conversations
brute force
,
constructive algorithms
,
math
800
x29669
1850C
Word on the Paper
implementation
,
strings
800
x45028
1850B
Ten Words of Wisdom
implementation
,
sortings
800
x43448
1850A
To My Critics
implementation
,
sortings
800
x57799
1849A
Morning Sandwich
implementation
,
math
800
x29881
1847A
The Man who became a God
greedy
,
sortings
800
x22077
1846B
Rudolph and Tic-Tac-Toe
brute force
,
implementation
,
strings
800
x27024
1846A
Rudolph and Cut the Rope
implementation
,
math
800
x32629
1845A
Forbidden Integer
constructive algorithms
,
implementation
,
math
,
number theory
800
x28362
1844A
Subtraction Game
constructive algorithms
,
games
800
x24677
1843C
Sum in Binary Tree
bitmasks
,
combinatorics
,
math
,
trees
800
x33712
1843B
Long Long
greedy
,
math
,
two pointers
800
x29314
1843A
Sasha and Array Coloring
greedy
,
sortings
,
two pointers
800
x34479
1842A
Tenzing and Tsondu
games
,
math
800
x19897
1841A
Game with Board
constructive algorithms
,
games
800
x24798
1840A
Cipher Shifer
implementation
,
strings
,
two pointers
800
x34392
1839A
The Good Array
greedy
,
implementation
,
math
800
x17547
1838A
Blackboard List
constructive algorithms
,
math
800
x21626
1837A
Grasshopper on a Line
constructive algorithms
,
math
800
x33489
1836A
Destroyer
implementation
,
sortings
800
x20425
1834A
Unit Array
greedy
,
math
800
x25332
1833C
Vlad Building Beautiful Array
greedy
,
math
800
x26254
1833A
Musical Puzzle
implementation
,
strings
800
x32843
1832A
New Palindrome
strings
800
x25934
1831A
Twin Permutations
constructive algorithms
800
x27739
1829C
Mr. Perfectly Fine
bitmasks
,
greedy
,
implementation
800
x28924
1829B
Blank Space
implementation
800
x47655
1829A
Love Story
implementation
,
strings
800
x52495
1828A
Divisible Array
constructive algorithms
,
math
800
x23808
1825A
LuoTianyi and the Palindrome String
greedy
,
strings
800
x19743
1823A
A-characteristic
combinatorics
,
constructive algorithms
,
math
800
x16233
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