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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
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Custom test
Problems
#
Name
952F
2 + 2 != 4
2400
x397
952E
Cheese Board
2000
x642
952D
I'm Feeling Lucky!
probabilities
1800
x2453
952C
Ravioli Sort
implementation
1600
x2914
952B
A Map of the Cat
brute force
,
interactive
1900
x2059
949F
Astronomy
geometry
,
probabilities
3300
x59
949E
Binary Cards
brute force
2700
x648
949D
Curfew
binary search
,
brute force
,
greedy
,
sortings
2300
x832
949C
Data Center Maintenance
dfs and similar
,
graphs
1900
x2082
949B
A Leapfrog in the Array
constructive algorithms
,
math
1700
x3732
949A
Zebras
greedy
1600
x5405
946G
Almost Increasing Array
data structures
,
dp
2500
x696
946F
Fibonacci String Subsequences
combinatorics
,
dp
,
matrices
2400
x572
946E
Largest Beautiful Number
greedy
,
implementation
2200
x1104
946D
Timetable
dp
1800
x4462
940F
Machine Learning
brute force
,
data structures
2600
x2667
940E
Cashback
data structures
,
dp
,
greedy
,
math
2000
x3788
940D
Alena And The Heater
binary search
,
implementation
1600
x3640
940C
Phone Numbers
constructive algorithms
,
implementation
,
strings
1500
x5904
940B
Our Tanya is Crying Out Loud
dp
,
greedy
1400
x9040
939F
Cutlet
data structures
,
dp
2400
x978
939E
Maximize!
binary search
,
greedy
,
ternary search
,
two pointers
1800
x3164
939D
Love Rescue
dfs and similar
,
dsu
,
graphs
,
greedy
,
strings
1600
x7362
939C
Convenient For Everybody
binary search
,
two pointers
1600
x4645
938G
Shortest Path Queries
bitmasks
,
data structures
,
dsu
,
graphs
2900
x918
938F
Erasing Substrings
bitmasks
,
dp
,
greedy
2700
x506
938E
Max History
combinatorics
,
math
2300
x1332
938D
Buy a Ticket
data structures
,
graphs
,
shortest paths
2000
x5771
938C
Constructing Tests
binary search
,
brute force
,
constructive algorithms
1700
x3325
937B
Vile Grasshoppers
brute force
,
math
,
number theory
1400
x6918
936E
Iqea
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
shortest paths
,
trees
3400
x198
936D
World of Tank
dp
,
greedy
3000
x332
936C
Lock Puzzle
constructive algorithms
,
implementation
,
strings
2300
x1183
936B
Sleepy Game
dfs and similar
,
dp
,
games
,
graphs
2100
x3274
936A
Save Energy!
binary search
,
implementation
,
math
1700
x4372
935F
Fafa and Array
data structures
,
greedy
2600
x368
935E
Fafa and Ancient Mathematics
dfs and similar
,
dp
,
trees
2300
x899
935D
Fafa and Ancient Alphabet
math
,
probabilities
1900
x2641
935C
Fifa and Fafa
geometry
1600
x4763
934A
A Compatible Pair
brute force
,
games
1400
x7019
933E
A Preponderant Reunion
constructive algorithms
,
dp
3200
x226
933D
A Creative Cutout
brute force
,
combinatorics
,
math
2900
x333
933C
A Colourful Prospect
geometry
,
graphs
2700
x585
933B
A Determined Cleanup
math
2000
x1924
933A
A Twisty Movement
dp
1800
x4996
932G
Palindrome Partition
dp
,
string suffix structures
,
strings
2900
x953
932F
Escape Through Leaf
data structures
,
dp
,
geometry
2700
x2984
932E
Team Work
combinatorics
,
dp
,
math
2400
x2899
932D
Tree
binary search
,
dp
,
trees
2200
x1752
932C
Permutation Cycle
brute force
,
constructive algorithms
1600
x4038
931C
Laboratory Work
implementation
,
math
1700
x3364
930E
Coins Exhibition
data structures
,
dp
,
math
2900
x437
930D
Game with Tokens
data structures
,
games
,
implementation
2500
x414
930C
Teodor is not a liar!
data structures
,
dp
1900
x2137
930B
Game with String
implementation
,
probabilities
,
strings
1600
x2683
930A
Peculiar apple-tree
dfs and similar
,
graphs
,
trees
1500
x7222
929D
Пограничные врата
2400
x152
929C
Красивая команда
*special problem
,
combinatorics
,
math
1700
x1162
929A
Прокат велосипедов
*special problem
,
greedy
,
implementation
1400
x2500
928D
Autocompletion
*special problem
,
strings
,
trees
1900
x813
928C
Dependency management
*special problem
,
graphs
,
implementation
1900
x888
928B
Chat
*special problem
,
dp
1400
x2541
927A
BuberPool Taxi Optimization
*special problem
,
interactive
2900
x1
926J
Segments
data structures
2100
x392
926I
A Vital Problem
1700
x666
926H
Endless Roses Most Beautiful
2200
x219
926G
Large Bouquets
1500
x1482
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
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
x5314
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
x4398
922C
Cave Painting
brute force
,
number theory
1600
x7144
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
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