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Rayan
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Rayan Programming Contest 2024 - Selection (Codeforces Round, Div. 1 + Div. 2)
6 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
1928A
Rectangle Cutting
geometry
,
math
800
x22842
1927C
Choose the Different Ones!
brute force
,
greedy
,
math
1000
x28232
1927B
Following the String
constructive algorithms
,
greedy
,
strings
900
x33620
1927A
Make it White
greedy
,
strings
800
x43977
1926C
Vlad and a Sum of Sum of Digits
dp
,
implementation
1200
x27057
1926B
Vlad and Shapes
geometry
,
implementation
800
x32807
1926A
Vlad and the Best of Five
implementation
800
x49168
1925B
A Balanced Problemset?
brute force
,
greedy
,
math
,
number theory
1200
x20284
1925A
We Got Everything Covered!
constructive algorithms
,
greedy
,
strings
800
x29025
1923B
Monsters Attack!
dp
,
greedy
,
implementation
1100
x17865
1923A
Moving Chips
greedy
,
implementation
800
x24836
1922B
Forming Triangles
combinatorics
,
constructive algorithms
,
math
,
sortings
1200
x20849
1922A
Tricky Template
constructive algorithms
,
implementation
,
strings
800
x27175
1921D
Very Different Array
data structures
,
greedy
,
sortings
,
two pointers
1100
x21843
1921C
Sending Messages
greedy
,
math
900
x29616
1921B
Arranging Cats
greedy
,
implementation
800
x33990
1921A
Square
greedy
,
math
800
x43799
1920B
Summation Game
games
,
greedy
,
math
,
sortings
1100
x21107
1920A
Satisfying Constraints
brute force
,
greedy
,
math
800
x27985
1919B
Plus-Minus Split
greedy
800
x29856
1919A
Wallet Exchange
games
,
math
800
x33569
1918B
Minimize Inversions
constructive algorithms
,
data structures
,
greedy
,
implementation
,
sortings
900
x24059
1918A
Brick Wall
constructive algorithms
,
greedy
,
implementation
,
math
800
x30414
1917B
Erase First or Second Letter
brute force
,
combinatorics
,
data structures
,
dp
,
strings
1100
x22837
1917A
Least Product
constructive algorithms
,
math
800
x25649
1916C
Training Before the Olympiad
constructive algorithms
,
games
,
greedy
,
implementation
,
math
1200
x18017
1916B
Two Divisors
constructive algorithms
,
math
,
number theory
1000
x26224
1916A
2023
constructive algorithms
,
implementation
,
math
,
number theory
800
x26179
1915D
Unnatural Language Processing
greedy
,
implementation
,
strings
900
x30621
1915C
Can I Square?
binary search
,
implementation
800
x43590
1915B
Not Quite Latin Square
bitmasks
,
brute force
,
implementation
800
x42886
1915A
Odd One Out
bitmasks
,
implementation
800
x58629
1914D
Three Activities
brute force
,
dp
,
greedy
,
implementation
,
sortings
1200
x22392
1914C
Quests
greedy
,
math
1100
x24723
1914B
Preparing for the Contest
constructive algorithms
,
math
800
x30600
1914A
Problemsolving Log
implementation
,
strings
800
x32068
1913B
Swap and Delete
strings
1000
x27824
1913A
Rating Increase
implementation
800
x25382
1912L
LOL Lovers
strings
800
x7138
1910A
Username
*special problem
,
implementation
1100
x1795
1909B
Make Almost Equal With Mod
bitmasks
,
constructive algorithms
,
math
,
number theory
1200
x17488
1909A
Distinct Buttons
implementation
,
math
800
x18022
1907C
Removal of Unattractive Pairs
constructive algorithms
,
greedy
,
math
,
strings
1200
x20444
1907B
YetnotherrokenKeoard
data structures
,
implementation
,
strings
1000
x26033
1907A
Rook
implementation
800
x37139
1906A
Easy As ABC
brute force
1000
x4536
1905B
Begginer's Zelda
greedy
,
trees
1100
x16602
1905A
Constructive Problems
constructive algorithms
,
math
800
x23094
1904B
Collecting Game
binary search
,
dp
,
greedy
,
sortings
,
two pointers
1100
x15871
1904A
Forked!
brute force
,
implementation
900
x20701
1903B
StORage room
bitmasks
,
brute force
,
constructive algorithms
,
greedy
1200
x12970
1903A
Halloumi Boxes
brute force
,
greedy
,
sortings
800
x34031
1902B
Getting Points
binary search
,
brute force
,
greedy
1100
x14628
1902A
Binary Imbalance
constructive algorithms
800
x21297
1901B
Chip and Ribbon
greedy
,
math
1100
x15128
1901A
Line Trip
greedy
,
math
800
x33934
1900B
Laura and Operations
dp
,
math
900
x17652
1900A
Cover in Water
constructive algorithms
,
greedy
,
implementation
,
strings
800
x29316
1899C
Yarik and Array
dp
,
greedy
,
two pointers
1100
x21715
1899B
250 Thousand Tons of TNT
brute force
,
implementation
,
number theory
1100
x21144
1899A
Game with Integers
games
,
math
,
number theory
800
x48189
1898A
Milica and String
brute force
,
implementation
,
strings
800
x16148
1896B
AB Flipping
greedy
,
strings
,
two pointers
900
x15083
1896A
Jagged Swaps
sortings
800
x25405
1895B
Points and Minimum Distance
greedy
,
math
,
sortings
800
x20553
1895A
Treasure Chest
math
800
x24548
1894B
Two Out of Three
constructive algorithms
1000
x16108
1894A
Secret Sport
implementation
,
strings
800
x19070
1891B
Deja Vu
brute force
,
math
,
sortings
1100
x18455
1891A
Sorting with Twos
constructive algorithms
,
sortings
800
x19345
1890B
Qingshan Loves Strings
constructive algorithms
,
implementation
800
x17620
1890A
Doremy's Paint 3
constructive algorithms
800
x27912
1886B
Fear of the Dark
binary search
,
geometry
,
math
1200
x16347
1886A
Sum of Three
brute force
,
constructive algorithms
,
math
800
x26017
1884B
Haunted House
binary search
,
greedy
,
math
,
two pointers
1100
x12820
1884A
Simple Design
brute force
,
greedy
,
math
800
x17585
1883C
Raspberries
dp
,
math
1000
x28497
1883B
Chemistry
strings
900
x33462
1883A
Morning
math
800
x25929
1882A
Increasing Sequence
greedy
800
x25523
1881C
Perfect Square
brute force
,
implementation
1200
x17252
1881B
Three Threadlets
math
900
x25733
1881A
Don't Try to Count
brute force
,
strings
800
x33014
1879B
Chips on the Board
constructive algorithms
,
greedy
900
x22777
1879A
Rigged!
greedy
800
x23251
1878C
Vasilije in Cacak
math
900
x34025
1878B
Aleksa and Stack
constructive algorithms
,
math
800
x31666
1878A
How Much Does Daytona Cost?
greedy
800
x45908
1877C
Joyboard
math
,
number theory
1200
x11165
1877A
Goals of Victory
math
800
x24541
1876A
Helmets in Night Light
greedy
,
sortings
1000
x18562
1875A
Jellyfish and Undertale
brute force
,
greedy
900
x26510
1874A
Jellyfish and Game
brute force
,
games
,
greedy
,
implementation
1200
x17264
1873E
Building an Aquarium
binary search
,
sortings
1100
x27585
1873D
1D Eraser
greedy
,
implementation
,
two pointers
800
x35777
1873C
Target Practice
implementation
,
math
800
x42024
1873B
Good Kid
brute force
,
greedy
,
math
800
x49873
1873A
Short Sort
brute force
,
implementation
800
x55549
1872D
Plus Minus Permutation
math
1200
x24662
1872C
Non-coprime Split
math
,
number theory
1100
x23664
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