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Rayan
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Rayan Programming Contest 2024 - Selection (Codeforces Round, Div. 1 + Div. 2)
5 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
1856B
Good Arrays
implementation
,
math
900
x24580
1856A
Tales of a Sort
implementation
800
x26710
1855B
Longest Divisors Interval
brute force
,
combinatorics
,
greedy
,
math
,
number theory
900
x27526
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
1850D
Balanced Round
brute force
,
greedy
,
implementation
,
sortings
900
x38126
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
x57800
1849A
Morning Sandwich
implementation
,
math
800
x29881
1848A
Vika and Her Friends
games
,
math
900
x16966
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
1845B
Come Together
geometry
,
implementation
,
math
900
x21767
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
x34480
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
1837B
Comparison String
greedy
900
x30697
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
1833B
Restore the Weather
greedy
,
sortings
900
x26839
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
1828B
Permutation Swap
math
,
number theory
900
x23822
1828A
Divisible Array
constructive algorithms
,
math
800
x23808
1825A
LuoTianyi and the Palindrome String
greedy
,
strings
800
x19743
1823B
Sort with Step
brute force
,
math
,
sortings
900
x16159
1823A
A-characteristic
combinatorics
,
constructive algorithms
,
math
800
x16233
1822C
Bun Lover
math
800
x23168
1822B
Karina and Array
greedy
,
math
,
sortings
800
x24945
1822A
TubeTube Feed
brute force
,
implementation
800
x24447
1821A
Matching
combinatorics
,
math
800
x19976
1820A
Yura's New Name
implementation
,
strings
800
x16801
1818B
Indivisible
constructive algorithms
900
x15149
1818A
Politics
greedy
,
implementation
800
x13042
1816A
Ian Visits Mary
constructive algorithms
,
geometry
,
number theory
800
x17682
1814A
Coins
implementation
,
math
800
x29912
1811A
Insert Digit
greedy
,
math
,
strings
800
x31350
1810B
Candies
constructive algorithms
,
math
,
number theory
800
x17657
1810A
Beautiful Sequence
brute force
,
greedy
800
x20849
1809A
Garland
implementation
800
x24070
1808A
Lucky Numbers
brute force
,
implementation
900
x18449
1807D
Odd Queries
data structures
,
implementation
900
x34168
1807C
Find and Replace
greedy
,
implementation
,
strings
800
x30858
1807B
Grab the Candies
greedy
800
x42675
1807A
Plus or Minus
implementation
800
x64131
1806B
Mex Master
constructive algorithms
,
greedy
900
x17993
1806A
Walking Master
geometry
,
greedy
,
math
800
x25658
1805B
The String Has a Target
greedy
,
strings
800
x18726
1805A
We Need the Zero
bitmasks
,
brute force
800
x24331
1804A
Lame King
greedy
,
math
800
x18016
1802A
Likes
greedy
,
implementation
800
x15945
1800A
Is It a Cat?
implementation
,
strings
800
x31856
1799A
Recent Actions
data structures
,
greedy
,
implementation
,
math
800
x11643
1798A
Showstopper
greedy
,
implementation
,
sortings
800
x19961
1797A
Li Hua and Maze
constructive algorithms
,
flows
,
graphs
,
greedy
,
implementation
800
x17605
1796A
Typical Interview Problem
brute force
,
implementation
,
strings
800
x18910
1795B
Ideal Point
brute force
,
geometry
,
greedy
900
x22201
1795A
Two Towers
brute force
,
implementation
,
strings
800
x23709
1794B
Not Dividing
constructive algorithms
,
greedy
,
math
900
x23201
1794A
Prefix and Suffix Array
strings
800
x17254
1793A
Yet Another Promotion
greedy
,
math
800
x18128
1792A
GamingForces
greedy
,
sortings
800
x28362
1791C
Prepend and Append
implementation
,
two pointers
800
x46980
1791B
Following Directions
geometry
,
implementation
800
x45092
1791A
Codeforces Checking
implementation
,
strings
800
x62334
1790B
Taisia and Dice
greedy
,
greedy
,
math
800
x27586
1790A
Polycarp and the Day of Pi
implementation
,
math
,
strings
800
x37420
1789B
Serval and Inversion Magic
brute force
,
implementation
,
strings
,
two pointers
800
x16291
1789A
Serval and Mocha's Array
brute force
,
math
,
number theory
800
x19619
1788A
One and Two
brute force
,
implementation
,
math
800
x31814
1787A
Exponential Equation
constructive algorithms
,
math
800
x19289
1786A2
Alternating Deck (hard version)
implementation
800
x11468
1786A1
Non-alternating Deck (easy version)
implementation
800
x14101
1783A
Make it Beautiful
constructive algorithms
,
math
,
sortings
800
x30996
1781A
Parallel Projection
geometry
,
math
800
x15152
1780A
Hayato and School
constructive algorithms
,
greedy
800
x21788
1779B
MKnez's ConstructiveForces Task
constructive algorithms
,
math
900
x23723
1779A
Hall of Fame
constructive algorithms
,
greedy
,
strings
800
x23223
1778A
Flip Flop Sum
greedy
,
implementation
800
x24503
1777B
Emordnilap
combinatorics
,
greedy
,
math
900
x17649
1777A
Everybody Likes Good Arrays!
greedy
,
math
800
x25198
1776A
Walking Boy
greedy
800
x7054
1775A2
Gardener and the Capybaras (hard version)
constructive algorithms
,
greedy
900
x18855
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