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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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*has extra registration
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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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Status
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Custom test
Problems
#
Name
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
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
1807C
Find and Replace
greedy
,
implementation
,
strings
800
x30858
1807B
Grab the Candies
greedy
800
x42675
1807A
Plus or Minus
implementation
800
x64131
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
x24330
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
1795A
Two Towers
brute force
,
implementation
,
strings
800
x23709
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
1779A
Hall of Fame
constructive algorithms
,
greedy
,
strings
800
x23223
1778A
Flip Flop Sum
greedy
,
implementation
800
x24503
1777A
Everybody Likes Good Arrays!
greedy
,
math
800
x25197
1776A
Walking Boy
greedy
800
x7054
1775A1
Gardener and the Capybaras (easy version)
brute force
,
constructive algorithms
,
implementation
800
x19743
1774A
Add Plus Minus Sign
constructive algorithms
,
math
800
x22528
1773F
Football
constructive algorithms
800
x4198
1772B
Matrix Rotation
brute force
,
implementation
800
x29483
1772A
A+B?
implementation
800
x48995
1769A
Узкая дорога
*special problem
,
math
800
x1974
1768A
Greatest Convex
greedy
,
math
,
number theory
800
x29081
1767B
Block Towers
data structures
,
greedy
,
sortings
800
x20474
1767A
Cut the Triangle
implementation
800
x20656
1766A
Extremely Round
brute force
,
implementation
800
x27390
1765B
Broken Keyboard
greedy
800
x9117
1764A
Doremy's Paint
greedy
800
x16674
1763A
Absolute Maximization
bitmasks
,
constructive algorithms
,
greedy
,
math
800
x15774
1762A
Divide and Conquer
greedy
,
math
,
number theory
800
x19310
1761A
Two Permutations
brute force
,
constructive algorithms
800
x20323
1760C
Advantage
data structures
,
implementation
,
sortings
800
x37786
1760B
Atilla's Favorite Problem
greedy
,
implementation
,
strings
800
x45280
1760A
Medium Number
implementation
,
sortings
800
x61240
1759B
Lost Permutation
math
800
x22349
1759A
Yes-Yes?
implementation
,
strings
800
x30279
1758A
SSeeeeiinngg DDoouubbllee
constructive algorithms
,
strings
800
x25341
1754B
Kevin and Permutation
constructive algorithms
,
greedy
,
math
800
x18982
1754A
Technical Support
greedy
800
x23362
1750B
Maximum Substring
brute force
,
greedy
,
implementation
800
x16278
1750A
Indirect Sort
constructive algorithms
,
implementation
,
math
800
x17125
1749A
Cowardly Rooks
greedy
,
implementation
800
x22419
1748A
The Ultimate Square
math
800
x24181
1747A
Two Groups
constructive algorithms
,
greedy
800
x25054
1746B
Rebellion
constructive algorithms
,
greedy
,
two pointers
800
x17302
1746A
Maxmina
constructive algorithms
,
greedy
800
x19889
1744B
Even-Odd Increments
implementation
,
math
800
x23622
1744A
Number Replacement
greedy
,
implementation
800
x27276
1743B
Permutation Value
constructive algorithms
,
greedy
800
x22298
1743A
Password
brute force
,
combinatorics
,
implementation
,
math
800
x26921
1742B
Increasing
greedy
,
implementation
,
sortings
800
x48708
1742A
Sum
implementation
800
x75247
1741B
Funny Permutation
constructive algorithms
,
math
800
x25555
1741A
Compare T-Shirt Sizes
implementation
,
implementation
,
strings
800
x31111
1740B
Jumbo Extra Cheese 2
geometry
,
greedy
,
sortings
800
x13788
1740A
Factorise N+M
constructive algorithms
,
number theory
800
x20426
1739A
Immobile Knight
implementation
800
x22868
1738A
Glory Addicts
greedy
,
implementation
,
sortings
800
x13569
1736A
Make A Equal to B
brute force
,
greedy
,
sortings
800
x22924
1735A
Working Week
constructive algorithms
,
greedy
,
math
800
x20353
1734B
Bright, Nice, Brilliant
constructive algorithms
800
x15867
1734A
Select Three Sticks
brute force
,
greedy
,
sortings
800
x21297
1733A
Consecutive Sum
greedy
,
sortings
800
x21042
1731A
Joey Takes Money
greedy
,
math
800
x22700
1730A
Planets
data structures
,
greedy
,
sortings
800
x23180
1729B
Decode String
greedy
,
strings
800
x30471
1729A
Two Elevators
math
800
x40972
1728B
Best Permutation
constructive algorithms
,
greedy
800
x20189
1728A
Colored Balls: Revisited
brute force
,
greedy
,
implementation
,
sortings
800
x24729
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