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Rayan Programming Contest
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Rayan Programming Contest 2024 - Selection (Codeforces Round, Div. 1 + Div. 2)
6 days
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*has extra registration
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Difficulty:
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brute force
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
#
Name
1145C
Mystery Circuit
bitmasks
,
brute force
x807
1145B
Kanban Numbers
brute force
x1461
1143B
Nirvana
brute force
,
math
,
number theory
1200
x10584
1142A
The Beatles
brute force
,
math
1700
x3429
1140C
Playlist
brute force
,
data structures
,
sortings
1600
x9629
1138B
Circus
brute force
,
greedy
,
math
,
strings
1800
x4038
1132C
Painting the Fence
brute force
1700
x5449
1130C
Connect
brute force
,
dfs and similar
,
dsu
1400
x8664
1129A2
Toy Train
brute force
,
greedy
1800
x4112
1129A1
Toy Train (Simplified)
brute force
,
greedy
1700
x3833
1121B
Mike and Children
brute force
,
implementation
1200
x9105
1120E
The very same Munchhausen
brute force
2600
x129
1119E
Pavel and Triangles
brute force
,
dp
,
fft
,
greedy
,
ternary search
1900
x5056
1118D1
Coffee and Coursework (Easy version)
brute force
,
greedy
1700
x5703
1114C
Trailing Loves (or L'oeufs?)
brute force
,
implementation
,
math
,
number theory
1700
x7433
1114A
Got Any Grapes?
brute force
,
greedy
,
implementation
800
x18815
1111C
Creative Snap
binary search
,
brute force
,
divide and conquer
,
math
1700
x6292
1111B
Average Superhero Gang Power
brute force
,
implementation
,
math
1700
x6303
1109D
Sasha and Interesting Fact from Graph Theory
brute force
,
combinatorics
,
dp
,
math
,
trees
2400
x1346
1108E1
Array and Segments (Easy version)
brute force
,
greedy
,
implementation
1800
x4558
1108C
Nice Garland
brute force
,
greedy
,
math
1300
x12011
1108B
Divisors of Two Integers
brute force
,
greedy
,
math
,
number theory
1100
x23331
1105E
Helping Hiasat
bitmasks
,
brute force
,
dp
,
meet-in-the-middle
2200
x1659
1105B
Zuhair and Strings
brute force
,
implementation
,
strings
1100
x9928
1105A
Salem and Sticks
brute force
,
implementation
1100
x10998
1102F
Elongated Matrix
binary search
,
bitmasks
,
brute force
,
dp
,
graphs
2000
x2031
1098B
Nice table
brute force
,
constructive algorithms
,
greedy
,
math
2100
x1696
1097H
Mateusz and an Infinite Sequence
bitmasks
,
brute force
,
dp
,
strings
3400
x95
1097B
Petr and a Combination Lock
bitmasks
,
brute force
,
dp
1200
x29232
1097A
Gennady and a Card Game
brute force
,
implementation
800
x39171
1096C
Polygon for the Angle
brute force
,
geometry
1600
x6836
1091B
New Year and the Treasure Geolocation
brute force
,
constructive algorithms
,
greedy
,
implementation
1200
x10693
1091A
New Year and the Christmas Ornament
brute force
,
implementation
,
math
800
x17647
1088A
Ehab and another construction problem
brute force
,
constructive algorithms
800
x16900
1084A
The Fair Nut and Elevator
brute force
,
implementation
1000
x7939
1073D
Berland Fair
binary search
,
brute force
,
data structures
,
greedy
1700
x6437
1070H
BerOS File Suggestion
brute force
,
implementation
1500
x3666
1070G
Monsters and Potions
brute force
,
dp
,
greedy
,
implementation
2300
x844
1064A
Make a triangle!
brute force
,
geometry
,
math
800
x22645
1063D
Candies for Children
brute force
,
math
2600
x435
1060A
Phone Numbers
brute force
800
x14274
1057B
DDoS
*special problem
,
brute force
1400
x1841
1056G
Take Metro
brute force
,
data structures
,
graphs
2900
x257
1056E
Check Transcription
brute force
,
data structures
,
hashing
,
strings
2100
x2285
1051C
Vasya and Multisets
brute force
,
dp
,
greedy
,
implementation
,
math
1500
x9304
1043D
Mysterious Crime
brute force
,
combinatorics
,
math
,
meet-in-the-middle
,
two pointers
1700
x4465
1042B
Vitamins
bitmasks
,
brute force
,
dp
,
implementation
1200
x16349
1038E
Maximum Matching
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
2400
x990
1036G
Sources and Sinks
bitmasks
,
brute force
,
dfs and similar
2700
x382
1034B
Little C Loves 3 II
brute force
,
constructive algorithms
,
flows
,
graph matchings
2200
x2156
1033F
Boolean Computer
bitmasks
,
brute force
,
fft
,
math
2800
x393
1033C
Permutation Game
brute force
,
dp
,
games
1600
x5624
1031F
Familiar Operations
brute force
,
graphs
,
math
2800
x280
1029F
Multicolored Markers
binary search
,
brute force
,
math
,
number theory
2000
x2588
1028F
Make Symmetrical
brute force
2900
x525
1025D
Recovering BST
brute force
,
dp
,
math
,
number theory
,
trees
2100
x3672
1025B
Weakened Common Divisor
brute force
,
greedy
,
number theory
1600
x7922
1023A
Single Wildcard Pattern Matching
brute force
,
implementation
,
strings
1200
x8724
1020B
Badge
brute force
,
dfs and similar
,
graphs
1000
x21519
1019A
Elections
brute force
,
greedy
1700
x4653
1017H
The Films
brute force
3300
x147
1017F
The Neutral Zone
brute force
,
math
2500
x821
1017D
The Wu
bitmasks
,
brute force
,
data structures
1900
x3550
1016B
Segment Occurrences
brute force
,
implementation
1300
x9521
1015E1
Stars Drawing (Easy Edition)
brute force
,
dp
,
greedy
1700
x5894
1012A
Photo of The Sky
brute force
,
implementation
,
math
,
sortings
1500
x6437
1011B
Planning The Expedition
binary search
,
brute force
,
implementation
1200
x10196
1009D
Relatively Prime Graph
brute force
,
constructive algorithms
,
graphs
,
greedy
,
math
1700
x6269
1007B
Pave the Parallelepiped
bitmasks
,
brute force
,
combinatorics
,
math
,
number theory
2400
x956
1006F
Xor-Paths
bitmasks
,
brute force
,
dp
,
meet-in-the-middle
2100
x5441
1005F
Berland and the Shortest Paths
brute force
,
dfs and similar
,
graphs
,
shortest paths
2100
x1761
1005C
Summarize to the Power of Two
brute force
,
greedy
,
implementation
1300
x11760
1005B
Delete from the Left
brute force
,
implementation
,
strings
900
x23746
1004D
Sonya and Matrix
brute force
,
constructive algorithms
,
implementation
2300
x1428
1003C
Intense Heat
brute force
,
implementation
,
math
1300
x10648
999A
Mishka and Contest
brute force
,
implementation
800
x23188
997B
Roman Digits
brute force
,
combinatorics
,
dp
,
greedy
,
math
2000
x2985
997A
Convert to Ones
brute force
,
greedy
,
implementation
,
math
1500
x8336
995C
Leaving the Bar
brute force
,
data structures
,
geometry
,
greedy
,
math
,
sortings
2300
x1910
993C
Careful Maneuvering
bitmasks
,
brute force
,
geometry
2100
x1705
993B
Open Communication
bitmasks
,
brute force
1900
x1956
992D
Nastya and a Game
brute force
,
implementation
,
math
2100
x1655
991F
Concise and clear
brute force
,
greedy
,
implementation
,
math
2700
x310
991E
Bus Number
brute force
,
combinatorics
,
math
1800
x3509
990E
Post Lamps
brute force
,
greedy
2100
x2032
988E
Divisibility by 25
brute force
,
greedy
2100
x3994
988D
Points and Powers of Two
brute force
,
math
1800
x7350
988A
Diverse Team
brute force
,
implementation
800
x25270
987C
Three displays
brute force
,
dp
,
implementation
1400
x13620
986E
Prince's Problem
brute force
,
data structures
,
math
,
number theory
,
trees
2800
x799
982D
Shark
brute force
,
data structures
,
dsu
,
trees
1900
x2341
982A
Row
brute force
,
constructive algorithms
1200
x9101
981A
Antipalindrome
brute force
,
implementation
,
strings
900
x9436
979D
Kuro and GCD and XOR and SUM
binary search
,
bitmasks
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
math
,
number theory
,
strings
,
trees
2200
x1850
978D
Almost Arithmetic Progression
brute force
,
implementation
,
math
1500
x8858
975B
Mancala
brute force
,
implementation
1100
x6871
963C
Cutting Rectangle
brute force
,
math
,
number theory
2600
x592
962C
Make a Square
brute force
,
implementation
,
math
1400
x7889
961C
Chessboard
bitmasks
,
brute force
,
implementation
1400
x5317
960D
Full Binary Tree Queries
brute force
,
implementation
,
trees
2100
x1885
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