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Rayan Programming Contest
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Before contest
Rayan Programming Contest 2024 - Selection (Codeforces Round, Div. 1 + Div. 2)
6 days
Register now »
*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
Standings
Custom test
Problems
#
Name
1475E
Advertising Agency
combinatorics
,
math
,
sortings
1600
x13847
1475D
Cleaning the Phone
binary search
,
dp
,
sortings
,
two pointers
1800
x10252
1475C
Ball in Berland
combinatorics
,
graphs
,
math
1400
x21468
1475B
New Year's Number
brute force
,
dp
,
math
900
x49596
1475A
Odd Divisor
math
,
number theory
900
x62416
1474F
1 2 3 4 ...
dp
,
math
,
matrices
3000
x250
1474E
What Is It?
constructive algorithms
,
greedy
2500
x1352
1474D
Cleaning
data structures
,
dp
,
greedy
,
math
2200
x4010
1474C
Array Destruction
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
,
sortings
1700
x12811
1474B
Different Divisors
binary search
,
constructive algorithms
,
greedy
,
math
,
number theory
1000
x29337
1474A
Puzzle From the Future
greedy
800
x22647
1473G
Tiles
combinatorics
,
dp
,
fft
,
math
2800
x402
1473F
Strange Set
flows
,
math
2700
x970
1473E
Minimum Path
graphs
,
shortest paths
2400
x3738
1473D
Program
data structures
,
dp
,
implementation
,
strings
1700
x9747
1473C
No More Inversions
constructive algorithms
,
math
1500
x12740
1473B
String LCM
brute force
,
math
,
number theory
,
strings
1000
x31747
1473A
Replacing Elements
greedy
,
implementation
,
math
,
sortings
800
x34022
1472G
Moving to the Capital
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x4784
1472F
New Year's Puzzle
brute force
,
dp
,
graph matchings
,
greedy
,
sortings
2100
x3080
1472E
Correct Placement
binary search
,
data structures
,
dp
,
sortings
,
two pointers
1700
x8142
1472D
Even-Odd Game
dp
,
games
,
greedy
,
sortings
1200
x27729
1472C
Long Jumps
dp
,
graphs
1100
x31677
1472B
Fair Division
dp
,
greedy
,
math
800
x51260
1472A
Cards for Friends
greedy
,
math
800
x42244
1471B
Strange List
brute force
,
greedy
,
implementation
,
math
1100
x19400
1471A
Strange Partition
greedy
,
math
,
number theory
900
x26694
1470F
Strange Covering
divide and conquer
3500
x134
1470E
Strange Permutation
binary search
,
combinatorics
,
data structures
,
dp
,
graphs
,
implementation
,
two pointers
3200
x300
1470D
Strange Housing
constructive algorithms
,
dfs and similar
,
graph matchings
,
graphs
,
greedy
2200
x3753
1470C
Strange Shuffle
binary search
,
brute force
,
constructive algorithms
,
interactive
2500
x1351
1470B
Strange Definition
bitmasks
,
graphs
,
hashing
,
math
,
number theory
1900
x6352
1470A
Strange Birthday Party
binary search
,
dp
,
greedy
,
sortings
,
two pointers
1300
x22770
1469F
Power Sockets
binary search
,
data structures
,
greedy
2600
x965
1469E
A Bit Similar
bitmasks
,
brute force
,
hashing
,
string suffix structures
,
strings
,
two pointers
2400
x1999
1469D
Ceil Divisions
brute force
,
constructive algorithms
,
math
,
number theory
1700
x9499
1469C
Building a Fence
dp
,
greedy
,
implementation
,
two pointers
1600
x10802
1469B
Red and Blue
dp
,
greedy
1000
x27600
1469A
Regular Bracket Sequence
constructive algorithms
,
greedy
1000
x27622
1468N
Waste Sorting
greedy
,
implementation
900
x8258
1468M
Similar Sets
data structures
,
graphs
,
implementation
2300
x962
1468L
Prime Divisors Selection
binary search
,
greedy
,
math
,
number theory
2700
x328
1468K
The Robot
brute force
,
implementation
1600
x5166
1468J
Road Reform
dsu
,
graphs
,
greedy
1800
x4422
1468I
Plane Tiling
geometry
,
implementation
,
math
2500
x515
1468H
K and Medians
constructive algorithms
,
greedy
,
math
2200
x1829
1468G
Hobbits
binary search
,
geometry
2500
x826
1468F
Full Turn
geometry
,
hashing
,
number theory
1700
x3781
1468E
Four Segments
greedy
800
x8877
1468D
Firecrackers
binary search
,
sortings
1700
x4738
1468C
Berpizza
data structures
,
implementation
1400
x8133
1468B
Bakery
data structures
,
dsu
2900
x217
1468A
LaIS
data structures
,
dp
,
greedy
2200
x1696
1467E
Distinctive Roots in a Tree
data structures
,
dfs and similar
,
dp
,
trees
2500
x1451
1467D
Sum of Paths
combinatorics
,
dp
,
math
2200
x3714
1467C
Three Bags
constructive algorithms
,
greedy
1900
x6438
1467B
Hills And Valleys
brute force
,
implementation
1700
x11013
1467A
Wizard of Orz
constructive algorithms
,
greedy
,
math
900
x24410
1466I
The Riddle of the Sphinx
binary search
,
data structures
,
data structures
,
interactive
3400
x200
1466H
Finding satisfactory solutions
combinatorics
,
dp
,
graphs
,
greedy
,
math
3300
x308
1466G
Song of the Sirens
combinatorics
,
divide and conquer
,
hashing
,
math
,
string suffix structures
,
strings
2600
x944
1466F
Euclid's nightmare
bitmasks
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
,
sortings
2100
x2883
1466E
Apollo versus Pan
bitmasks
,
brute force
,
math
1800
x7359
1466D
13th Labour of Heracles
data structures
,
greedy
,
sortings
,
trees
1500
x11468
1466C
Canine poetry
dp
,
greedy
,
strings
1300
x17743
1466B
Last minute enhancements
dp
,
greedy
800
x22733
1466A
Bovine Dilemma
brute force
,
geometry
,
math
800
x22605
1464F
My Beautiful Madness
data structures
,
trees
3500
x328
1463F
Max Correct Set
bitmasks
,
dp
,
math
3100
x611
1463E
Plan of Lectures
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
2400
x1545
1463D
Pairs
binary search
,
constructive algorithms
,
greedy
,
two pointers
1900
x4470
1463C
Busy Robot
implementation
1800
x5684
1463B
Find The Array
bitmasks
,
constructive algorithms
,
greedy
1400
x19558
1463A
Dungeon
binary search
,
math
1100
x25748
1462F
The Treasure of The Segments
binary search
,
data structures
,
greedy
1800
x7055
1462E2
Close Tuples (hard version)
binary search
,
combinatorics
,
implementation
,
math
,
sortings
,
two pointers
1700
x9860
1462E1
Close Tuples (easy version)
binary search
,
combinatorics
,
math
,
sortings
,
two pointers
1500
x13893
1462D
Add to Neighbour and Remove
greedy
,
math
,
number theory
1400
x16874
1462C
Unique Number
brute force
,
greedy
,
math
900
x32880
1462B
Last Year's Substring
dp
,
implementation
,
strings
800
x27478
1462A
Favorite Sequence
implementation
,
two pointers
800
x42331
1461F
Mathematical Expression
constructive algorithms
,
dp
,
greedy
2700
x567
1461E
Water Level
brute force
,
graphs
,
greedy
,
implementation
,
math
2200
x2131
1461D
Divide and Summarize
binary search
,
brute force
,
data structures
,
divide and conquer
,
implementation
,
sortings
1600
x9304
1461C
Random Events
dp
,
math
,
probabilities
1500
x11342
1461B
Find the Spruce
brute force
,
dp
,
implementation
1400
x12679
1461A
String Generation
constructive algorithms
,
greedy
800
x18605
1459B
Move and Turn
dp
,
math
1300
x15050
1459A
Red-Blue Shuffle
math
,
probabilities
800
x17042
1458F
Range Diameter Sum
data structures
,
trees
3500
x282
1458E
Nim Shortcuts
data structures
,
games
3100
x497
1458D
Flip and Reverse
data structures
,
graphs
,
greedy
3100
x1165
1458C
Latin Square
math
,
matrices
2700
x1357
1458B
Glass Half Spilled
dp
2000
x3581
1458A
Row GCD
math
,
number theory
1600
x18519
1456E
XOR-ranges
dp
,
greedy
3500
x287
1455G
Forbidden Value
data structures
,
dp
2900
x419
1455F
String and Operations
dp
,
greedy
2800
x451
1455E
Four Points
brute force
,
constructive algorithms
,
flows
,
geometry
,
greedy
,
implementation
,
math
,
ternary search
2400
x1552
1455D
Sequence and Swaps
dp
,
greedy
,
sortings
1600
x12374
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