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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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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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Problems
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Status
Standings
Custom test
Problems
#
Name
926F
Mobile Communications
2000
x236
926E
Merge Equal Elements
constructive algorithms
,
data structures
1900
x932
926D
Choose Place
1600
x934
926C
Is This a Zebra?
implementation
1700
x1887
926B
Add Points
math
,
number theory
1800
x1715
926A
2-3-numbers
implementation
,
math
1300
x3815
925F
Parametric Circulation
binary search
,
flows
3100
x114
925E
May Holidays
data structures
,
trees
2900
x402
925D
Aztec Catacombs
constructive algorithms
2600
x524
925C
Big Secret
constructive algorithms
,
math
2200
x1321
925B
Resource Distribution
binary search
,
implementation
,
sortings
1700
x2208
925A
Stairs and Elevators
binary search
1600
x3485
924F
Minimal Subset Difference
dp
3200
x213
924E
Wardrobe
dp
,
greedy
2700
x517
924D
Contact ATC
2500
x872
924C
Riverside Curio
data structures
,
dp
,
greedy
1700
x3877
924B
Three-level Laser
binary search
,
greedy
,
two pointers
1600
x5315
924A
Mystical Mosaic
greedy
,
implementation
1300
x5051
923F
Public Service
constructive algorithms
,
graphs
,
trees
3200
x76
923E
Perpetual Subtraction
fft
,
math
,
matrices
3100
x455
923D
Picking Strings
constructive algorithms
,
implementation
,
strings
2500
x1199
923C
Perfect Security
data structures
,
greedy
,
strings
,
trees
1800
x4308
923B
Producing Snow
binary search
,
data structures
1600
x7355
923A
Primal Sport
math
,
number theory
1700
x5039
922F
Divisibility
constructive algorithms
,
dp
,
greedy
,
number theory
2400
x646
922E
Birds
dp
2200
x2167
922D
Robot Vacuum Cleaner
greedy
,
sortings
1800
x4399
922C
Cave Painting
brute force
,
number theory
1600
x7146
922B
Magic Forest
brute force
1300
x8524
922A
Cloning Toys
implementation
1300
x11710
92114
Labyrinth-14
3200
92113
Labyrinth-13
3200
92112
Labyrinth-12
3200
92111
Labyrinth-11
3200
92110
Labyrinth-10
3200
92109
Labyrinth-9
3200
92108
Labyrinth-8
3200
92107
Labyrinth-7
3200
92106
Labyrinth-6
3200
92105
Labyrinth-5
3200
92104
Labyrinth-4
3200
92103
Labyrinth-3
3200
92102
Labyrinth-2
3200
92101
Labyrinth-1
3200
920G
List Of Integers
binary search
,
bitmasks
,
brute force
,
combinatorics
,
math
,
number theory
2200
x1761
920F
SUM and REPLACE
brute force
,
data structures
,
dsu
,
number theory
2000
x6920
920E
Connected Components?
data structures
,
dfs and similar
,
dsu
,
graphs
2100
x6474
920D
Tanks
dp
,
greedy
,
implementation
2400
x730
920C
Swap Adjacent Elements
dfs and similar
,
greedy
,
math
,
sortings
,
two pointers
1400
x9247
920B
Tea Queue
implementation
1200
x7395
920A
Water The Garden
implementation
1000
x7792
919F
A Game With Numbers
games
,
graphs
,
shortest paths
2600
x340
919E
Congruence Equation
chinese remainder theorem
,
math
,
number theory
2100
x2143
919D
Substring
dfs and similar
,
dp
,
graphs
1700
x10227
919C
Seat Arrangements
brute force
,
implementation
1300
x8996
919B
Perfect Number
binary search
,
brute force
,
dp
,
implementation
,
number theory
1100
x28407
919A
Supermarket
brute force
,
greedy
,
implementation
800
x16160
918B
Radio Station
implementation
,
strings
900
x16917
918A
Eleven
brute force
,
implementation
800
x17140
917E
Upside Down
data structures
,
string suffix structures
,
strings
,
trees
3400
x136
917D
Stranger Trees
dp
,
math
,
matrices
,
trees
2600
x1163
917C
Pollywog
combinatorics
,
dp
,
matrices
2900
x406
917B
MADMAX
dfs and similar
,
dp
,
games
,
graphs
1700
x3543
917A
The Monster
dp
,
greedy
,
implementation
,
math
1800
x3528
916E
Jamie and Tree
data structures
,
trees
2400
x1688
916D
Jamie and To-do List
data structures
,
interactive
,
trees
2200
x518
916C
Jamie and Interesting Graph
constructive algorithms
,
graphs
,
shortest paths
1600
x5127
916B
Jamie and Binary Sequence (changed after round)
bitmasks
,
greedy
,
math
2000
x1919
916A
Jamie and Alarm Snooze
brute force
,
implementation
,
math
900
x8617
915G
Coprime Arrays
math
,
number theory
2300
x1293
915F
Imbalance Value of a Tree
data structures
,
dsu
,
graphs
,
trees
2400
x2534
915E
Physical Education Lessons
data structures
,
implementation
,
sortings
2300
x4502
915D
Almost Acyclic Graph
dfs and similar
,
graphs
2200
x3468
915C
Permute Digits
dp
,
greedy
1700
x7094
915B
Browser
implementation
1300
x7800
915A
Garden
implementation
900
x14822
914H
Ember and Storm's Tree Game
combinatorics
,
dp
,
games
,
trees
3400
x240
914G
Sum the Fibonacci
bitmasks
,
divide and conquer
,
dp
,
fft
,
math
2600
x936
914F
Substrings in a String
bitmasks
,
brute force
,
data structures
,
string suffix structures
,
strings
3000
x1677
914E
Palindromes in a Tree
bitmasks
,
data structures
,
divide and conquer
,
trees
2400
x1519
914D
Bash and a Tough Math Puzzle
data structures
,
number theory
1900
x5365
914C
Travelling Salesman and Special Numbers
brute force
,
combinatorics
,
dp
1800
x3847
914B
Conan and Agasa play a Card Game
games
,
greedy
,
implementation
1200
x8637
914A
Perfect Squares
brute force
,
implementation
,
math
900
x14203
913H
Don't Exceed
math
,
probabilities
3400
x127
913G
Power Substring
math
,
number theory
3200
x209
913F
Strongly Connected Tournament
dp
,
graphs
,
math
,
probabilities
2800
x659
913E
Logical Expression
bitmasks
,
dp
,
shortest paths
2400
x809
913D
Too Easy Problems
binary search
,
brute force
,
data structures
,
greedy
,
sortings
1800
x4752
913C
Party Lemonade
bitmasks
,
dp
,
greedy
1600
x7948
913B
Christmas Spruce
implementation
,
trees
1200
x16182
913A
Modular Exponentiation
implementation
,
math
900
x21408
912E
Prime Gift
binary search
,
dfs and similar
,
math
,
meet-in-the-middle
,
number theory
,
two pointers
2400
x1631
912D
Fishes
data structures
,
graphs
,
greedy
,
probabilities
,
shortest paths
2100
x2019
912C
Perun, Ult!
brute force
,
greedy
,
sortings
2500
x520
912B
New Year's Eve
bitmasks
,
constructive algorithms
,
number theory
1300
x12129
912A
Tricky Alchemy
implementation
800
x13540
911G
Mass Change Queries
data structures
2500
x2934
911F
Tree Destruction
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2400
x1757
911E
Stack Sorting
constructive algorithms
,
data structures
,
greedy
,
implementation
2000
x2564
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