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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
→ Filter Problems
Difficulty:
—
dp
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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Custom test
Problems
#
Name
2038L
Bridge Renovation
brute force
,
dp
,
greedy
,
math
,
two pointers
1400
x3183
2037E
Kachina's Favorite Binary String
dp
,
greedy
,
interactive
,
two pointers
1600
x4245
2033D
Kousuke's Assignment
data structures
,
dp
,
dsu
,
greedy
,
math
1300
x12988
2033C
Sakurako's Field Trip
dp
,
greedy
,
two pointers
1400
x12590
2028C
Alice's Adventures in Cutting Cake
binary search
,
dp
,
greedy
,
two pointers
1600
x5900
2027C
Add Zeros
brute force
,
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
1500
x8874
2008E
Alternating String
brute force
,
data structures
,
dp
,
greedy
,
implementation
,
strings
1500
x10002
1999E
Triple Operations
dp
,
implementation
,
math
1300
x18694
1997D
Maximize the Root
binary search
,
dfs and similar
,
dp
,
greedy
,
trees
1500
x12540
1994C
Hungry Games
binary search
,
dp
,
two pointers
1600
x10828
1986D
Mathematical Problem
brute force
,
dp
,
greedy
,
implementation
,
math
,
two pointers
1400
x15254
1984C1
Magnitude (Easy Version)
dp
,
greedy
,
math
1300
x16703
1976C
Job Interview
binary search
,
dp
,
greedy
,
implementation
,
two pointers
1600
x10444
1957C
How Does the Rook Move?
combinatorics
,
dp
,
math
1600
x9744
1948C
Arrow Path
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
shortest paths
1300
x17047
1946C
Tree Cutting
binary search
,
dp
,
greedy
,
implementation
,
trees
1600
x11065
1945D
Seraphim the Owl
dp
,
greedy
1300
x14602
1941E
Rudolf and k Bridges
binary search
,
data structures
,
dp
,
two pointers
1600
x9821
1937B
Binary Path
dp
,
greedy
,
implementation
1300
x15177
1927D
Find the Different Ones!
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
two pointers
1300
x21918
1926E
Vlad and an Odd Ordering
binary search
,
bitmasks
,
data structures
,
dp
,
implementation
,
math
,
number theory
1500
x12107
1924A
Did We Get Everything Covered?
constructive algorithms
,
dp
,
greedy
,
shortest paths
,
strings
1500
x14128
1919C
Grouping Increases
data structures
,
dp
,
greedy
1400
x19421
1900C
Anji's Binary Tree
dfs and similar
,
dp
,
trees
1300
x11716
1895C
Torn Lucky Ticket
brute force
,
dp
,
hashing
,
implementation
,
math
1400
x11382
1881E
Block Sequence
dp
1500
x14696
1879C
Make it Alternating
combinatorics
,
dp
,
greedy
1300
x17396
1875D
Jellyfish and Mex
dp
1600
x8911
1872E
Data Structures Fan
binary search
,
bitmasks
,
data structures
,
dp
1500
x14004
1870C
Colorful Table
binary search
,
data structures
,
dp
,
implementation
,
math
,
two pointers
1300
x11634
1860C
Game on Permutation
data structures
,
dp
,
games
,
greedy
1400
x13511
1858B
The Walkway
brute force
,
dp
,
greedy
,
math
,
number theory
1500
x11439
1856C
To Become Max
binary search
,
brute force
,
data structures
,
dp
1600
x12652
1851E
Nastya and Potions
dfs and similar
,
dp
,
graphs
,
sortings
1500
x10534
1847C
Vampiric Powers, anyone?
bitmasks
,
brute force
,
dp
,
greedy
1400
x13017
1845C
Strong Password
binary search
,
dp
,
greedy
,
strings
1400
x14463
1844C
Particles
dp
,
greedy
,
implementation
,
math
1300
x15835
1842C
Tenzing and Balls
dp
1500
x13072
1830A
Copil Copac Draws Trees
dfs and similar
,
dp
,
graphs
,
trees
1400
x13856
1829G
Hits Different
data structures
,
dp
,
implementation
,
math
1600
x10690
1811E
Living Sequence
binary search
,
dp
,
math
,
number theory
1500
x12524
1789C
Serval and Toxel's Arrays
combinatorics
,
dp
,
implementation
,
math
1500
x8661
1787C
Remove the Bracket
dp
,
greedy
,
math
1600
x7168
1774C
Ice and Fire
constructive algorithms
,
dp
,
greedy
1300
x12122
1771B
Hossam and Friends
binary search
,
constructive algorithms
,
dp
,
two pointers
1400
x14721
1769C2
Подкрутка II
*special problem
,
dp
1300
x976
1767D
Playoff
combinatorics
,
constructive algorithms
,
dp
,
greedy
,
math
1500
x10027
1766C
Hamiltonian Wall
dp
,
implementation
1300
x13745
1759E
The Humanoid
brute force
,
dp
,
sortings
1500
x10962
1753A2
Make Nonzero Sum (hard version)
constructive algorithms
,
dp
,
greedy
1500
x10483
1753A1
Make Nonzero Sum (easy version)
constructive algorithms
,
dp
,
greedy
1300
x15113
1748C
Zero-Sum Prefixes
brute force
,
data structures
,
dp
,
greedy
,
implementation
1600
x11256
1741E
Sending a Sequence Over the Network
dp
1600
x12595
1739C
Card Game
combinatorics
,
constructive algorithms
,
dp
,
games
1500
x9167
1738C
Even Number Addicts
dp
,
games
,
greedy
,
math
1500
x11305
1722E
Counting Rectangles
brute force
,
data structures
,
dp
,
implementation
1600
x11035
1714D
Color with Occurrences
brute force
,
data structures
,
dp
,
greedy
,
strings
1600
x9182
1706C
Qpwoeirut And The City
dp
,
flows
,
greedy
,
implementation
1400
x15003
1703G
Good Key, Bad Key
bitmasks
,
brute force
,
dp
,
greedy
,
math
1600
x10855
1703F
Yet Another Problem About Pairs Satisfying an Inequality
binary search
,
data structures
,
dp
,
greedy
,
sortings
1300
x20492
1692G
2^Sort
data structures
,
dp
,
sortings
,
two pointers
1400
x18152
1689C
Infected Tree
dfs and similar
,
dp
,
trees
1600
x11392
1677A
Tokitsukaze and Strange Inequality
brute force
,
data structures
,
dp
1600
x8517
1676G
White-Black Balanced Subtrees
dfs and similar
,
dp
,
graphs
,
trees
1300
x16043
1673C
Palindrome Basis
brute force
,
dp
,
math
,
number theory
1500
x12974
1661B
Getting Zero
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
1300
x18011
1660C
Get an Even String
dp
,
greedy
,
strings
1300
x19728
1659C
Line Empire
binary search
,
brute force
,
dp
,
greedy
,
implementation
,
math
1500
x10700
1646C
Factorials and Powers of Two
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
math
1500
x14363
1644C
Increase Subarray Sums
brute force
,
dp
,
greedy
,
implementation
1400
x13872
1633D
Make Them Equal
dp
,
greedy
1600
x14281
1632C
Strange Test
binary search
,
bitmasks
,
brute force
,
dp
,
math
1600
x12828
1618D
Array and Operations
dp
,
greedy
,
math
1300
x19096
1614C
Divan and bitwise operations
bitmasks
,
combinatorics
,
constructive algorithms
,
dp
,
math
1500
x10322
1609C
Complex Market Analysis
binary search
,
dp
,
implementation
,
number theory
,
schedules
,
two pointers
1400
x9806
1567C
Carrying Conundrum
bitmasks
,
combinatorics
,
dp
,
math
1600
x12242
1555D
Say No to Palindromes
brute force
,
constructive algorithms
,
dp
,
strings
1600
x12535
1555C
Coin Rows
brute force
,
constructive algorithms
,
dp
,
implementation
1300
x21975
1553D
Backspace
dp
,
greedy
,
strings
,
two pointers
1500
x13848
1553B
Reverse String
brute force
,
dp
,
hashing
,
implementation
,
strings
1300
x14232
1547E
Air Conditioners
data structures
,
dp
,
implementation
,
shortest paths
,
sortings
,
two pointers
1500
x14587
1538F
Interesting Function
binary search
,
dp
,
math
,
number theory
1500
x19484
1537E1
Erase and Extend (Easy Version)
binary search
,
brute force
,
dp
,
greedy
,
hashing
,
implementation
,
string suffix structures
,
strings
,
two pointers
1600
x13159
1536C
Diluc and Kaeya
data structures
,
dp
,
hashing
,
number theory
1500
x14318
1535C
Unstable String
binary search
,
dp
,
greedy
,
implementation
,
strings
,
two pointers
1400
x16602
1534C
Little Alawn's Puzzle
combinatorics
,
dp
,
dsu
,
graphs
,
math
1300
x12883
1528A
Parsa's Humongous Tree
dfs and similar
,
divide and conquer
,
dp
,
greedy
,
trees
1600
x15000
1526C1
Potions (Easy Version)
brute force
,
data structures
,
dp
,
greedy
1500
x22849
1526B
I Hate 1111
dp
,
math
,
number theory
1400
x31076
1519D
Maximum Sum of Products
brute force
,
dp
,
implementation
,
math
,
two pointers
1600
x15433
1516B
AGAGA XOOORRR
bitmasks
,
brute force
,
dp
,
greedy
1500
x19693
1513C
Add One
dp
,
matrices
1600
x14180
1498C
Planar Reflections
brute force
,
data structures
,
dp
1600
x9818
1492C
Maximum width
binary search
,
data structures
,
dp
,
greedy
,
two pointers
1500
x16235
1476C
Longest Simple Cycle
dp
,
graphs
,
greedy
1600
x11442
1470A
Strange Birthday Party
binary search
,
dp
,
greedy
,
sortings
,
two pointers
1300
x22775
1469C
Building a Fence
dp
,
greedy
,
implementation
,
two pointers
1600
x10803
1466C
Canine poetry
dp
,
greedy
,
strings
1300
x17743
1461C
Random Events
dp
,
math
,
probabilities
1500
x11344
1461B
Find the Spruce
brute force
,
dp
,
implementation
1400
x12679
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