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Rayan
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Rayan Programming Contest 2024 - Selection (Codeforces Round, Div. 1 + Div. 2)
4 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
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Custom test
Problems
#
Name
372D
Choosing Subtree is Fun
binary search
,
data structures
,
dfs and similar
,
trees
,
two pointers
2600
x991
372C
Watching Fireworks is Fun
data structures
,
dp
,
math
2100
x4183
372B
Counting Rectangles is Fun
brute force
,
divide and conquer
,
dp
1900
x2648
372A
Counting Kangaroos is Fun
binary search
,
greedy
,
sortings
,
two pointers
1600
x13174
371E
Subway Innovation
greedy
,
math
,
two pointers
2000
x1309
371D
Vessels
data structures
,
dsu
,
implementation
,
trees
1800
x5712
371C
Hamburgers
binary search
,
brute force
1600
x26862
371B
Fox Dividing Cheese
math
,
number theory
1300
x11477
371A
K-Periodic Array
greedy
,
implementation
,
math
1000
x6133
370E
Summer Reading
dp
,
greedy
2500
x295
370D
Broken Monitor
brute force
,
constructive algorithms
,
greedy
,
implementation
2100
x635
370C
Mittens
constructive algorithms
,
greedy
,
sortings
1800
x1584
370B
Berland Bingo
implementation
1300
x2527
370A
Rook, Bishop and King
graphs
,
math
,
shortest paths
1100
x10391
369E
Valera and Queries
binary search
,
data structures
2200
x2206
369D
Valera and Fools
dfs and similar
,
dp
,
graphs
,
shortest paths
2200
x1163
369C
Valera and Elections
dfs and similar
,
graphs
,
trees
1600
x10165
369B
Valera and Contest
constructive algorithms
,
implementation
,
math
1400
x6528
369A
Valera and Plates
greedy
,
implementation
900
x11109
368B
Sereja and Suffixes
data structures
,
dp
1100
x42569
368A
Sereja and Coat Rack
implementation
1000
x7521
367E
Sereja and Intervals
combinatorics
,
dp
2700
x1149
367D
Sereja and Sets
bitmasks
,
dfs and similar
2400
x659
367C
Sereja and the Arrangement of Numbers
graphs
,
greedy
,
sortings
2000
x1795
367B
Sereja ans Anagrams
binary search
,
data structures
1900
x2477
367A
Sereja and Algorithm
data structures
,
implementation
1500
x4332
366E
Dima and Magic Guitar
brute force
,
implementation
,
math
2200
x775
366D
Dima and Trap Graph
binary search
,
data structures
,
dfs and similar
,
dsu
,
shortest paths
,
two pointers
2000
x1567
366C
Dima and Salad
dp
1900
x4876
366B
Dima and To-do List
brute force
,
implementation
1200
x6839
366A
Dima and Guards
implementation
1100
x4539
365B
The Fibonacci Segment
implementation
1100
x14553
365A
Good Number
implementation
1100
x18831
364E
Empty Rectangles
divide and conquer
,
two pointers
3000
x578
364D
Ghd
brute force
,
math
,
probabilities
2900
x2112
364C
Beautiful Set
brute force
,
number theory
2300
x599
364B
Free Market
dp
,
greedy
2200
x1185
364A
Matrix
combinatorics
,
data structures
,
implementation
1600
x4677
363E
Two Circles
brute force
,
data structures
,
implementation
2500
x203
363D
Renting Bikes
binary search
,
greedy
1800
x3966
363C
Fixing Typos
greedy
,
implementation
1400
x13375
363B
Fence
brute force
,
dp
1100
x54017
363A
Soroban
implementation
800
x10813
362E
Petya and Pipes
flows
,
graphs
,
shortest paths
2300
x815
362D
Fools and Foolproof Roads
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
2100
x931
362C
Insertion Sort
data structures
,
dp
,
implementation
,
math
1900
x1796
362B
Petya and Staircases
implementation
,
sortings
1100
x13883
362A
Two Semiknights Meet
greedy
,
math
1500
x2678
361B
Levko and Permutation
constructive algorithms
,
math
,
number theory
1200
x8092
361A
Levko and Table
constructive algorithms
,
implementation
800
x16786
360E
Levko and Game
graphs
,
greedy
,
shortest paths
2800
x711
360D
Levko and Sets
number theory
2600
x406
360C
Levko and Strings
combinatorics
,
dp
2500
x1110
360B
Levko and Array
binary search
,
dp
2000
x3028
360A
Levko and Array Recovery
greedy
,
implementation
1700
x2058
359E
Neatness
constructive algorithms
,
dfs and similar
2400
x470
359D
Pair of Numbers
binary search
,
brute force
,
data structures
,
math
,
two pointers
2000
x5145
359C
Prime Number
math
,
number theory
1900
x3151
359B
Permutation
constructive algorithms
,
dp
,
math
1400
x8079
359A
Table
constructive algorithms
,
greedy
,
implementation
1000
x8576
358E
Dima and Kicks
brute force
,
dsu
,
graphs
,
implementation
2300
x399
358D
Dima and Hares
dp
,
greedy
1800
x4090
358C
Dima and Containers
constructive algorithms
,
greedy
,
implementation
2000
x2034
358B
Dima and Text Messages
brute force
,
strings
1500
x3735
358A
Dima and Continuous Line
brute force
,
implementation
1400
x7775
357B
Flag Day
constructive algorithms
,
implementation
1400
x8206
357A
Group of Students
brute force
,
greedy
,
implementation
1000
x6859
356E
Xenia and String Problem
dp
,
hashing
,
implementation
,
string suffix structures
,
strings
3000
x410
356D
Bags and Coins
bitmasks
,
constructive algorithms
,
dp
,
greedy
2700
x973
356C
Compartments
combinatorics
,
constructive algorithms
,
greedy
,
implementation
2100
x1273
356B
Xenia and Hamming
implementation
,
math
1900
x1935
356A
Knight Tournament
data structures
,
dsu
1500
x13791
355B
Vasya and Public Transport
greedy
,
implementation
1100
x4516
355A
Vasya and Digital Root
constructive algorithms
,
implementation
1100
x9461
354E
Lucky Number Representation
constructive algorithms
,
dfs and similar
,
dp
2200
x878
354D
Transferring Pyramid
dp
2900
x464
354C
Vasya and Beautiful Arrays
brute force
,
dp
,
number theory
2100
x3083
354B
Game with Strings
bitmasks
,
dp
,
games
2400
x460
354A
Vasya and Robot
brute force
,
greedy
,
math
1500
x5487
353E
Antichain
dp
,
graph matchings
,
greedy
2200
x590
353D
Queue
constructive algorithms
,
dp
2000
x2927
353C
Find Maximum
implementation
,
math
,
number theory
1600
x4916
353B
Two Heaps
combinatorics
,
constructive algorithms
,
greedy
,
implementation
,
math
,
sortings
1900
x2292
353A
Domino
implementation
,
math
1200
x18618
352B
Jeff and Periods
implementation
,
sortings
1300
x16609
352A
Jeff and Digits
brute force
,
implementation
,
math
1000
x25866
351E
Jeff and Permutation
greedy
2200
x1614
351D
Jeff and Removing Periods
data structures
2700
x1092
351C
Jeff and Brackets
dp
,
matrices
2500
x562
351B
Jeff and Furik
combinatorics
,
dp
,
probabilities
1900
x2406
351A
Jeff and Rounding
dp
,
greedy
,
implementation
,
math
1800
x2928
350E
Wrong Floyd
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
2200
x779
350D
Looking for Owls
binary search
,
data structures
,
geometry
,
hashing
,
sortings
2400
x269
350C
Bombs
greedy
,
implementation
,
sortings
1600
x6562
350B
Resort
graphs
1500
x3198
350A
TL
brute force
,
greedy
,
implementation
1200
x16479
349B
Color the Fence
data structures
,
dp
,
greedy
,
implementation
1700
x14036
349A
Cinema Line
greedy
,
implementation
1100
x30375
348E
Pilgrims
dfs and similar
,
dp
,
trees
2800
x445
348D
Turtles
dp
,
matrices
2500
x1740
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