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Rayan
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Before contest
Rayan Programming Contest 2024 - Selection (Codeforces Round 989, Div. 1 + Div. 2)
2 days
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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
932D
Tree
binary search
,
dp
,
trees
2200
x1753
932C
Permutation Cycle
brute force
,
constructive algorithms
1600
x4040
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
x2147
930B
Game with String
implementation
,
probabilities
,
strings
1600
x2685
929D
Пограничные врата
2400
x152
929C
Красивая команда
*special problem
,
combinatorics
,
math
1700
x1162
928D
Autocompletion
*special problem
,
strings
,
trees
1900
x813
928C
Dependency management
*special problem
,
graphs
,
implementation
1900
x888
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
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
x1890
926B
Add Points
math
,
number theory
1800
x1715
925F
Parametric Circulation
binary search
,
flows
3100
x114
925E
May Holidays
data structures
,
trees
2900
x404
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
x3486
924F
Minimal Subset Difference
dp
3200
x213
924E
Wardrobe
dp
,
greedy
2700
x517
924D
Contact ATC
2500
x873
924C
Riverside Curio
data structures
,
dp
,
greedy
1700
x3879
924B
Three-level Laser
binary search
,
greedy
,
two pointers
1600
x5319
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
x4309
923B
Producing Snow
binary search
,
data structures
1600
x7356
923A
Primal Sport
math
,
number theory
1700
x5039
922F
Divisibility
constructive algorithms
,
dp
,
greedy
,
number theory
2400
x646
922E
Birds
dp
2200
x2168
922D
Robot Vacuum Cleaner
greedy
,
sortings
1800
x4401
922C
Cave Painting
brute force
,
number theory
1600
x7149
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
x1763
920F
SUM and REPLACE
brute force
,
data structures
,
dsu
,
number theory
2000
x6930
920E
Connected Components?
data structures
,
dfs and similar
,
dsu
,
graphs
2100
x6486
920D
Tanks
dp
,
greedy
,
implementation
2400
x730
919F
A Game With Numbers
games
,
graphs
,
shortest paths
2600
x341
919E
Congruence Equation
chinese remainder theorem
,
math
,
number theory
2100
x2143
919D
Substring
dfs and similar
,
dp
,
graphs
1700
x10240
917E
Upside Down
data structures
,
string suffix structures
,
strings
,
trees
3400
x136
917D
Stranger Trees
dp
,
math
,
matrices
,
trees
2600
x1164
917C
Pollywog
combinatorics
,
dp
,
matrices
2900
x406
917B
MADMAX
dfs and similar
,
dp
,
games
,
graphs
1700
x3544
917A
The Monster
dp
,
greedy
,
implementation
,
math
1800
x3529
916E
Jamie and Tree
data structures
,
trees
2400
x1692
916D
Jamie and To-do List
data structures
,
interactive
,
trees
2200
x518
916C
Jamie and Interesting Graph
constructive algorithms
,
graphs
,
shortest paths
1600
x5128
916B
Jamie and Binary Sequence (changed after round)
bitmasks
,
greedy
,
math
2000
x1919
915G
Coprime Arrays
math
,
number theory
2300
x1293
915F
Imbalance Value of a Tree
data structures
,
dsu
,
graphs
,
trees
2400
x2538
915E
Physical Education Lessons
data structures
,
implementation
,
sortings
2300
x4509
915D
Almost Acyclic Graph
dfs and similar
,
graphs
2200
x3471
915C
Permute Digits
dp
,
greedy
1700
x7095
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
x1682
914E
Palindromes in a Tree
bitmasks
,
data structures
,
divide and conquer
,
trees
2400
x1527
914D
Bash and a Tough Math Puzzle
data structures
,
number theory
1900
x5371
914C
Travelling Salesman and Special Numbers
brute force
,
combinatorics
,
dp
1800
x3850
913H
Don't Exceed
math
,
probabilities
3400
x128
913G
Power Substring
math
,
number theory
3200
x209
913F
Strongly Connected Tournament
dp
,
graphs
,
math
,
probabilities
2800
x660
913E
Logical Expression
bitmasks
,
dp
,
shortest paths
2400
x810
913D
Too Easy Problems
binary search
,
brute force
,
data structures
,
greedy
,
sortings
1800
x4753
913C
Party Lemonade
bitmasks
,
dp
,
greedy
1600
x7949
912E
Prime Gift
binary search
,
dfs and similar
,
math
,
meet-in-the-middle
,
number theory
,
two pointers
2400
x1637
912D
Fishes
data structures
,
graphs
,
greedy
,
probabilities
,
shortest paths
2100
x2021
912C
Perun, Ult!
brute force
,
greedy
,
sortings
2500
x520
911G
Mass Change Queries
data structures
2500
x2939
911F
Tree Destruction
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2400
x1759
911E
Stack Sorting
constructive algorithms
,
data structures
,
greedy
,
implementation
2000
x2564
911D
Inversion Counting
brute force
,
math
1800
x4618
910C
Minimum Sum
constructive algorithms
,
greedy
,
math
1700
x1815
910B
Door Frames
greedy
,
implementation
1600
x1711
909F
AND-permutations
constructive algorithms
2500
x582
909E
Coprocessor
dfs and similar
,
dp
,
graphs
,
greedy
1900
x2113
909D
Colorful Points
data structures
,
greedy
,
implementation
2100
x1950
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