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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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combine-tags-by-or
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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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Custom test
Problems
#
Name
406D
Hill Climbing
dfs and similar
,
geometry
,
trees
2200
x1183
405E
Graph Cutting
dfs and similar
,
graphs
2300
x1440
405D
Toy Sum
greedy
,
implementation
,
math
1700
x3125
405C
Unusual Product
implementation
,
math
1600
x4680
405B
Domino Effect
1100
x5781
405A
Gravity Flip
greedy
,
implementation
,
sortings
900
x102836
404E
Maze 1D
binary search
,
greedy
,
implementation
2200
x579
404D
Minesweeper 1D
dp
,
implementation
1900
x2162
404C
Restore Graph
dfs and similar
,
graphs
,
sortings
1800
x5242
404B
Marathon
implementation
,
math
1500
x2934
404A
Valera and X
implementation
1000
x24101
403E
Two Rooted Trees
data structures
,
implementation
,
trees
2900
x219
403D
Beautiful Pairs of Numbers
combinatorics
,
dp
2300
x1118
402E
Strictly Positive Matrix
graphs
,
math
2200
x2201
402D
Upgrading Array
dp
,
greedy
,
math
,
number theory
1800
x2626
402C
Searching for Graph
brute force
,
constructive algorithms
,
graphs
1500
x5959
402B
Trees in a Row
brute force
,
implementation
1400
x3822
402A
Nuts
greedy
,
math
1100
x4618
401E
Olympic Games
math
2500
x168
401D
Roman and Numbers
bitmasks
,
brute force
,
combinatorics
,
dp
,
number theory
2000
x4198
401C
Team
constructive algorithms
,
greedy
,
implementation
1400
x20084
401B
Sereja and Contests
greedy
,
implementation
,
math
1200
x4436
401A
Vanya and Cards
implementation
,
math
800
x16329
400E
Inna and Binary Logic
binary search
,
bitmasks
,
data structures
2100
x972
400D
Dima and Bacteria
dsu
,
graphs
,
shortest paths
2000
x2918
400C
Inna and Huge Candy Matrix
implementation
,
math
1500
x2902
400B
Inna and New Matrix of Candies
brute force
,
implementation
,
schedules
1200
x7780
400A
Inna and Choose Options
implementation
1000
x6530
399B
Red and Blue Balls
x1842
399A
Pages
implementation
x4159
398E
Sorting Permutations
x91
398D
Instant Messanger
data structures
x939
398C
Tree and Array
constructive algorithms
x214
398B
Painting The Wall
dp
,
probabilities
x1033
398A
Cards
constructive algorithms
,
implementation
x927
397B
On Corruption and Numbers
constructive algorithms
,
implementation
,
math
x754
397A
On Segment's Own Points
implementation
x2631
396E
On Iteration of One Well-Known Function
math
x154
396D
On Sum of Number of Inversions in Permutations
combinatorics
,
math
x439
396C
On Changing Tree
data structures
,
graphs
,
trees
x1610
396B
On Sum of Fractions
math
,
number theory
x1079
396A
On Number of Decompositions into Multipliers
combinatorics
,
math
,
number theory
x1517
394E
Lightbulb for Minister
geometry
x117
394D
Physical Education and Buns
brute force
,
implementation
,
math
x271
394C
Dominoes
constructive algorithms
,
greedy
x520
394B
Very Beautiful Number
math
x575
394A
Counting Sticks
brute force
,
implementation
x2665
393B
Three matrices
x1986
393A
Nineteen
x6657
392E
Deleting Substrings
x179
392D
Three Arrays
data structures
x217
392C
Yet Another Number Sequence
combinatorics
,
math
,
matrices
x594
392B
Tower of Hanoi
dp
x950
392A
Blocked Points
math
x976
391F3
Stock Trading
x107
391F2
Stock Trading
greedy
x108
391F1
Stock Trading
dp
x182
391E2
Three Trees
x160
391E1
Three Trees
x119
391D2
Supercollider
data structures
x198
391D1
Supercollider
brute force
x214
391C3
The Tournament
x171
391C2
The Tournament
greedy
x138
391C1
The Tournament
brute force
x189
391B
Word Folding
brute force
x392
391A
Genetic Engineering
implementation
,
two pointers
x1723
390E
Inna and Large Sweet Matrix
x261
390D
Inna and Sweet Matrix
constructive algorithms
x518
390C
Inna and Candy Boxes
data structures
x628
390B
Inna, Dima and Song
implementation
x1179
390A
Inna and Alarm Clock
implementation
x3588
389B
Fox and Cross
greedy
,
implementation
1100
x6941
389A
Fox and Number Game
greedy
,
math
1000
x14106
388E
Fox and Meteor Shower
geometry
3100
x122
388D
Fox and Perfect Sets
math
2700
x446
388C
Fox and Card Game
games
,
greedy
,
sortings
2000
x3433
388B
Fox and Minimal path
bitmasks
,
constructive algorithms
,
graphs
,
implementation
,
math
1900
x2482
388A
Fox and Box Accumulation
greedy
,
sortings
1400
x11508
387E
George and Cards
binary search
,
data structures
2200
x890
387D
George and Interesting Graph
graph matchings
2200
x1021
387C
George and Number
greedy
,
implementation
1700
x2188
387B
George and Round
brute force
,
greedy
,
two pointers
1200
x12287
387A
George and Sleep
implementation
900
x9717
386D
Game with Points
dp
,
graphs
,
implementation
,
shortest paths
2100
x443
386C
Diverse Substrings
dp
,
strings
,
two pointers
2000
x804
386B
Fly, freebies, fly!
binary search
,
brute force
,
implementation
1400
x2187
386A
Second-Price Auction
implementation
800
x6453
385E
Bear in the Field
math
,
matrices
2300
x590
385D
Bear and Floodlight
bitmasks
,
dp
,
geometry
2200
x811
385C
Bear and Prime Numbers
binary search
,
brute force
,
data structures
,
dp
,
implementation
,
math
,
number theory
1700
x9716
385B
Bear and Strings
brute force
,
greedy
,
implementation
,
math
,
strings
1200
x9983
385A
Bear and Raspberry
brute force
,
greedy
,
implementation
1000
x16524
384B
Multitasking
greedy
,
implementation
,
sortings
,
two pointers
1500
x3549
384A
Coder
implementation
800
x16366
383E
Vowels
combinatorics
,
divide and conquer
,
dp
2700
x3165
383D
Antimatter
dp
2300
x3037
383C
Propagating tree
data structures
,
dfs and similar
,
trees
2000
x6559
383B
Volcanoes
binary search
,
implementation
,
sortings
,
two pointers
2500
x697
383A
Milking cows
data structures
,
greedy
1600
x5301
382E
Ksenia and Combinatorics
combinatorics
,
dp
2600
x383
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