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Rayan
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Rayan Programming Contest 2024 - Selection (Codeforces Round 989, Div. 1 + Div. 2)
3 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
1373B
01 Game
games
900
x36682
1373A
Donut Shops
greedy
,
implementation
,
math
1000
x27231
1372F
Omkar and Modes
binary search
,
divide and conquer
,
interactive
2700
x451
1372E
Omkar and Last Floor
dp
,
greedy
,
two pointers
2900
x1192
1372D
Omkar and Circle
brute force
,
dp
,
games
,
greedy
2100
x5422
1372C
Omkar and Baseball
constructive algorithms
,
math
1500
x17961
1372B
Omkar and Last Class of Math
greedy
,
math
,
number theory
1300
x28443
1372A
Omkar and Completion
constructive algorithms
,
implementation
800
x32053
1371F
Raging Thunder
data structures
,
divide and conquer
,
implementation
2800
x622
1371E2
Asterism (Hard Version)
binary search
,
combinatorics
,
dp
,
math
,
number theory
,
sortings
2300
x2360
1371E1
Asterism (Easy Version)
binary search
,
brute force
,
combinatorics
,
math
,
number theory
,
sortings
1900
x5279
1371D
Grid-00100
constructive algorithms
,
greedy
,
implementation
1600
x13036
1371C
A Cookie for You
greedy
,
implementation
,
math
1300
x20615
1371B
Magical Calendar
math
1200
x19207
1371A
Magical Sticks
math
800
x46498
1370F2
The Hidden Pair (Hard Version)
binary search
,
dfs and similar
,
graphs
,
interactive
,
shortest paths
,
trees
2700
x1500
1370F1
The Hidden Pair (Easy Version)
binary search
,
dfs and similar
,
graphs
,
interactive
,
shortest paths
,
trees
2400
x1625
1370E
Binary Subsequence Rotation
binary search
,
constructive algorithms
,
data structures
,
greedy
2100
x4920
1370D
Odd-Even Subsequence
binary search
,
dp
,
dsu
,
greedy
,
implementation
2000
x9776
1370C
Number Game
games
,
math
,
number theory
1400
x24785
1370B
GCD Compression
constructive algorithms
,
math
,
number theory
1100
x23817
1370A
Maximum GCD
greedy
,
implementation
,
math
,
number theory
800
x53054
1369F
BareLee
dfs and similar
,
dp
,
games
2700
x653
1369E
DeadLee
data structures
,
dfs and similar
,
greedy
,
implementation
,
sortings
2400
x2281
1369D
TediousLee
dp
,
graphs
,
greedy
,
math
,
trees
1900
x8688
1369C
RationalLee
greedy
,
math
,
sortings
,
two pointers
1400
x19684
1369B
AccurateLee
greedy
,
implementation
,
strings
1200
x24542
1369A
FashionabLee
geometry
,
math
800
x36785
1368H2
Breadboard Capacity (hard version)
3500
x228
1368H1
Breadboard Capacity (easy version)
dp
,
flows
,
greedy
3300
x354
1368G
Shifting Dominoes
data structures
,
geometry
,
graphs
,
trees
3200
x609
1368F
Lamps on a Circle
games
,
implementation
,
interactive
,
math
2600
x1052
1368E
Ski Accidents
constructive algorithms
,
graphs
,
greedy
2500
x2227
1368D
AND, OR and square sum
bitmasks
,
greedy
,
math
1700
x11963
1368C
Even Picture
constructive algorithms
1500
x13490
1368B
Codeforces Subsequences
brute force
,
constructive algorithms
,
greedy
,
math
,
strings
1500
x19913
1368A
C+=
brute force
,
greedy
,
implementation
,
math
800
x39962
1367F2
Flying Sort (Hard Version)
binary search
,
data structures
,
dp
,
greedy
,
sortings
,
two pointers
2400
x1684
1367F1
Flying Sort (Easy Version)
dp
,
greedy
,
two pointers
2100
x3305
1367E
Necklace Assembly
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
number theory
1900
x5492
1367D
Task On The Board
constructive algorithms
,
greedy
,
implementation
,
sortings
1800
x8377
1367C
Social Distance
constructive algorithms
,
greedy
,
math
1300
x23608
1367B
Even Array
greedy
,
math
800
x54383
1367A
Short Substrings
implementation
,
strings
800
x58176
1366G
Construct the String
data structures
,
dp
,
strings
2700
x554
1366F
Jog Around The Graph
binary search
,
dp
,
geometry
,
graphs
2700
x818
1366E
Two Arrays
binary search
,
brute force
,
combinatorics
,
constructive algorithms
,
dp
,
two pointers
2100
x4303
1366D
Two Divisors
constructive algorithms
,
math
,
number theory
2000
x10682
1366C
Palindromic Paths
greedy
,
math
1500
x13623
1366B
Shuffle
math
,
two pointers
1300
x21319
1366A
Shovels and Swords
binary search
,
greedy
,
math
1100
x30388
1365G
Secure Password
bitmasks
,
combinatorics
,
constructive algorithms
,
interactive
,
math
2800
x1176
1365F
Swaps Again
constructive algorithms
,
implementation
,
sortings
2100
x4474
1365E
Maximum Subsequence Value
brute force
,
constructive algorithms
1900
x7892
1365D
Solve The Maze
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
shortest paths
1700
x17593
1365C
Rotation Matching
constructive algorithms
,
data structures
,
greedy
,
implementation
1400
x23275
1365B
Trouble Sort
constructive algorithms
,
implementation
1300
x27068
1365A
Matrix Game
games
,
greedy
,
implementation
1100
x24201
1364E
X-OR
bitmasks
,
constructive algorithms
,
divide and conquer
,
interactive
,
probabilities
2700
x1438
1364D
Ehab's Last Corollary
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
trees
2100
x4442
1364C
Ehab and Prefix MEXs
brute force
,
constructive algorithms
,
greedy
1600
x13243
1364B
Most socially-distanced subsequence
greedy
,
two pointers
1300
x20135
1364A
XXXXX
brute force
,
data structures
,
number theory
,
two pointers
1200
x28435
1363F
Rotating Substrings
dp
,
strings
2600
x1537
1363E
Tree Shuffling
dfs and similar
,
dp
,
greedy
,
trees
2000
x6868
1363D
Guess The Maximums
binary search
,
implementation
,
interactive
,
math
2100
x4101
1363C
Game On Leaves
games
,
trees
1600
x18941
1363B
Subsequence Hate
implementation
,
strings
1400
x23794
1363A
Odd Selection
brute force
,
implementation
,
math
1200
x36318
1362C
Johnny and Another Rating Drop
bitmasks
,
greedy
,
math
1400
x18606
1362B
Johnny and His Hobbies
bitmasks
,
brute force
1200
x19331
1362A
Johnny and Ancient Computer
implementation
1000
x24532
1361F
Johnny and New Toy
data structures
,
implementation
,
math
3300
x154
1361E
James and the Chase
dfs and similar
,
graphs
,
probabilities
,
trees
3000
x703
1361D
Johnny and James
greedy
,
implementation
,
math
,
trees
2900
x322
1361C
Johnny and Megan's Necklace
binary search
,
bitmasks
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2500
x1652
1361B
Johnny and Grandmaster
greedy
,
implementation
,
math
,
sortings
1900
x3674
1361A
Johnny and Contribution
constructive algorithms
,
graphs
,
greedy
,
sortings
1700
x8461
1360H
Binary Median
binary search
,
bitmasks
,
brute force
,
constructive algorithms
2100
x4609
1360G
A/B Matrix
constructive algorithms
,
greedy
,
math
1900
x7857
1360F
Spy-string
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
hashing
,
strings
1700
x12522
1360E
Polygon
dp
,
graphs
,
implementation
,
shortest paths
1300
x25604
1360D
Buying Shovels
math
,
number theory
1300
x33742
1360C
Similar Pairs
constructive algorithms
,
graph matchings
,
greedy
,
sortings
1100
x33095
1360B
Honest Coach
greedy
,
sortings
800
x48388
1360A
Minimal Square
greedy
,
math
800
x51252
1359F
RC Kaboom Show
binary search
,
brute force
,
data structures
,
geometry
,
math
2900
x544
1359E
Modular Stability
combinatorics
,
math
,
number theory
2000
x6163
1359D
Yet Another Yet Another Task
data structures
,
dp
,
implementation
,
two pointers
2000
x9572
1359C
Mixing Water
binary search
,
math
1700
x13935
1359B
New Theatre Square
brute force
,
dp
,
greedy
,
implementation
,
two pointers
1000
x27931
1359A
Berland Poker
brute force
,
greedy
,
math
1000
x29831
1358F
Tasty Cookie
binary search
,
constructive algorithms
,
greedy
,
implementation
2700
x460
1358E
Are You Fired?
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x2339
1358D
The Best Vacation
binary search
,
brute force
,
greedy
,
implementation
,
two pointers
1900
x8232
1358C
Celex Update
math
1600
x17466
1358B
Maria Breaks the Self-isolation
greedy
,
sortings
1000
x25022
1358A
Park Lighting
greedy
,
math
800
x39762
1357E2
Root of quantum Fourier transform
x51
1357E1
Power of quantum Fourier transform
x193
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