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Rayan
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Before contest
Rayan Programming Contest 2024 - Selection (Codeforces Round, Div. 1 + Div. 2)
4 days
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*has extra registration
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Difficulty:
—
constructive algorithms
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
Standings
Custom test
Problems
#
Name
2039B
Shohag Loves Strings
constructive algorithms
,
greedy
,
implementation
,
strings
1000
x9104
2039A
Shohag Loves Mod
constructive algorithms
,
number theory
800
x11336
2037C
Superultra's Favorite Permutation
constructive algorithms
,
greedy
,
math
,
number theory
1000
x15380
2035B
Everyone Loves Tres
constructive algorithms
,
greedy
,
math
,
number theory
900
x14688
2033B
Sakurako and Water
brute force
,
constructive algorithms
,
greedy
900
x22941
2033A
Sakurako and Kosuke
constructive algorithms
,
implementation
,
math
800
x32875
2032B
Medians
constructive algorithms
,
greedy
,
implementation
,
math
1100
x15537
2031A
Penchick and Modern Monument
constructive algorithms
,
dp
,
greedy
,
math
800
x14824
2030B
Minimise Oneness
combinatorics
,
constructive algorithms
,
games
,
math
800
x20051
2030A
A Gift From Orangutan
constructive algorithms
,
greedy
,
math
,
sortings
800
x23436
2029B
Replacement
constructive algorithms
,
games
,
strings
1100
x8246
2026A
Perpendicular Segments
constructive algorithms
,
geometry
,
greedy
,
math
900
x15912
2024B
Buying Lemonade
binary search
,
constructive algorithms
,
sortings
1100
x13125
2022A
Bus to Pénjamo
constructive algorithms
,
greedy
,
implementation
,
math
800
x13749
2013B
Battle for Survive
constructive algorithms
,
greedy
,
math
900
x22969
2013A
Zhan's Blender
constructive algorithms
,
math
800
x27109
2008A
Sakurako's Exam
brute force
,
constructive algorithms
,
greedy
,
math
800
x35217
2005A
Simple Palindrome
combinatorics
,
constructive algorithms
,
greedy
,
math
900
x21675
2002B
Removals Game
constructive algorithms
,
games
1000
x18885
2002A
Distanced Coloring
constructive algorithms
,
implementation
,
math
800
x19469
2001B
Generate Permutation
constructive algorithms
800
x24027
1999B
Card Game
brute force
,
constructive algorithms
,
implementation
1000
x32515
1998B
Minimize Equal Sum Subarrays
constructive algorithms
,
math
,
number theory
1000
x23852
1998A
Find K Distinct Points with Fixed Center
constructive algorithms
,
implementation
,
math
800
x23971
1997C
Even Positions
constructive algorithms
,
data structures
,
greedy
1100
x22047
1997B
Make Three Regions
constructive algorithms
,
two pointers
1100
x20667
1994B
Fun Game
bitmasks
,
constructive algorithms
,
greedy
,
math
1100
x16591
1994A
Diverse Game
constructive algorithms
,
greedy
,
implementation
800
x20280
1993B
Parity and Sum
constructive algorithms
,
greedy
1100
x22797
1992C
Gorilla and Permutation
constructive algorithms
,
math
900
x29186
1992A
Only Pluses
brute force
,
constructive algorithms
,
greedy
,
math
,
sortings
800
x41456
1991B
AND Reconstruction
bitmasks
,
constructive algorithms
,
greedy
1100
x16415
1984A
Strange Splitting
constructive algorithms
800
x21202
1983A
Array Divisibility
constructive algorithms
,
math
800
x25737
1978A
Alice and Books
constructive algorithms
,
greedy
,
sortings
800
x25807
1977B
Binary Colouring
bitmasks
,
constructive algorithms
,
greedy
,
math
1100
x17701
1969B
Shifts and Sorting
constructive algorithms
,
greedy
1000
x19201
1969A
Two Friends
constructive algorithms
,
implementation
,
math
800
x20028
1968C
Assembly via Remainders
constructive algorithms
,
number theory
1000
x25180
1966B
Rectangle Filling
constructive algorithms
,
implementation
1100
x15060
1966A
Card Exchange
constructive algorithms
,
games
,
greedy
800
x17946
1957B
A BIT of a Construction
bitmasks
,
constructive algorithms
,
greedy
,
implementation
1100
x18030
1957A
Stickogon
constructive algorithms
,
greedy
800
x23410
1955B
Progressive Square
constructive algorithms
,
data structures
,
implementation
,
sortings
1000
x28123
1954A
Painting the Ribbon
constructive algorithms
,
greedy
,
math
900
x24296
1951A
Dual Trigger
constructive algorithms
,
greedy
,
math
900
x19851
1948A
Special Characters
brute force
,
constructive algorithms
800
x28781
1944B
Equal XOR
bitmasks
,
constructive algorithms
1100
x16305
1942B
Bessie and MEX
constructive algorithms
,
math
1100
x14093
1942A
Farmer John's Challenge
constructive algorithms
,
math
800
x17364
1935A
Entertainment in MAC
constructive algorithms
,
strings
800
x28137
1930B
Permutation Printing
brute force
,
constructive algorithms
,
math
1000
x15486
1929B
Sasha and the Drawing
constructive algorithms
,
greedy
,
math
800
x25445
1929A
Sasha and the Beautiful Array
constructive algorithms
,
greedy
,
math
,
sortings
800
x31788
1927B
Following the String
constructive algorithms
,
greedy
,
strings
900
x33670
1925A
We Got Everything Covered!
constructive algorithms
,
greedy
,
strings
800
x29032
1922A
Tricky Template
constructive algorithms
,
implementation
,
strings
800
x27209
1918B
Minimize Inversions
constructive algorithms
,
data structures
,
greedy
,
implementation
,
sortings
900
x24071
1918A
Brick Wall
constructive algorithms
,
greedy
,
implementation
,
math
800
x30420
1917A
Least Product
constructive algorithms
,
math
800
x25653
1916B
Two Divisors
constructive algorithms
,
math
,
number theory
1000
x26239
1916A
2023
constructive algorithms
,
implementation
,
math
,
number theory
800
x26184
1914B
Preparing for the Contest
constructive algorithms
,
math
800
x30646
1905A
Constructive Problems
constructive algorithms
,
math
800
x23131
1902A
Binary Imbalance
constructive algorithms
800
x21300
1900A
Cover in Water
constructive algorithms
,
greedy
,
implementation
,
strings
800
x29360
1894B
Two Out of Three
constructive algorithms
1000
x16113
1891A
Sorting with Twos
constructive algorithms
,
sortings
800
x19351
1890B
Qingshan Loves Strings
constructive algorithms
,
implementation
800
x17625
1890A
Doremy's Paint 3
constructive algorithms
800
x27941
1886A
Sum of Three
brute force
,
constructive algorithms
,
math
800
x26027
1879B
Chips on the Board
constructive algorithms
,
greedy
900
x22784
1878B
Aleksa and Stack
constructive algorithms
,
math
800
x31674
1870A
MEXanized Array
constructive algorithms
,
greedy
,
math
800
x19143
1869A
Make It Zero
constructive algorithms
900
x22435
1867B
XOR Palindromes
bitmasks
,
constructive algorithms
,
strings
1100
x16884
1867A
green_gold_dog, array and permutation
constructive algorithms
,
sortings
800
x20062
1864B
Swap and Reverse
constructive algorithms
,
greedy
,
sortings
,
strings
1100
x15476
1864A
Increasing and Decreasing
constructive algorithms
,
greedy
,
implementation
,
math
800
x20418
1862B
Sequence Game
constructive algorithms
800
x33121
1861B
Two Binary Strings
constructive algorithms
,
dp
,
greedy
1000
x21597
1861A
Prime Deletion
constructive algorithms
,
math
800
x24034
1860A
Not a Substring
constructive algorithms
,
strings
900
x21859
1859B
Olya and Game with Arrays
constructive algorithms
,
greedy
,
math
,
sortings
1000
x27962
1859A
United We Stand
constructive algorithms
,
math
,
number theory
800
x33577
1858C
Yet Another Permutation Problem
constructive algorithms
,
greedy
,
math
,
number theory
1000
x23301
1851A
Escalator Conversations
brute force
,
constructive algorithms
,
math
800
x29669
1845A
Forbidden Integer
constructive algorithms
,
implementation
,
math
,
number theory
800
x28369
1844B
Permutations & Primes
constructive algorithms
,
math
1000
x18350
1844A
Subtraction Game
constructive algorithms
,
games
800
x24690
1841A
Game with Board
constructive algorithms
,
games
800
x24798
1838B
Minimize Permutation Subarrays
constructive algorithms
,
math
1100
x16537
1838A
Blackboard List
constructive algorithms
,
math
800
x21628
1837C
Best Binary String
constructive algorithms
,
greedy
1000
x22233
1837A
Grasshopper on a Line
constructive algorithms
,
math
800
x33496
1831B
Array merging
constructive algorithms
,
greedy
1000
x21471
1831A
Twin Permutations
constructive algorithms
800
x27745
1828A
Divisible Array
constructive algorithms
,
math
800
x23808
1823A
A-characteristic
combinatorics
,
constructive algorithms
,
math
800
x16233
1818B
Indivisible
constructive algorithms
900
x15155
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