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Rayan
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Codeforces Round 1000 (Div. 2)
02:15:03
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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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Custom test
Problems
#
Name
1031C
Cram Time
greedy
1600
x5372
1031B
Curiosity Has No Limits
1500
x3947
1031A
Golden Plate
implementation
,
math
800
x13011
1030G
Linear Congruential Generator
number theory
2900
x373
1030F
Putting Boxes Together
data structures
2500
x828
1030E
Vasya and Good Sequences
bitmasks
,
dp
2000
x3140
1030D
Vasya and Triangle
geometry
,
number theory
1800
x6026
1030C
Vasya and Golden Ticket
implementation
1300
x9502
1030B
Vasya and Cornfield
geometry
1100
x12473
1030A
In Search of an Easy Problem
implementation
800
x139392
1029F
Multicolored Markers
binary search
,
brute force
,
math
,
number theory
2000
x2626
1029E
Tree with Small Distances
dp
,
graphs
,
greedy
2100
x3000
1029D
Concatenated Multiples
implementation
,
math
1900
x3915
1029C
Maximal Intersection
greedy
,
math
,
sortings
1600
x7666
1029B
Creating the Contest
dp
,
greedy
,
math
1200
x17194
1029A
Many Equal Substrings
implementation
,
strings
1300
x12478
1028H
Make Square
math
2900
x501
1028G
Guess the number
dp
,
interactive
3000
x581
1028F
Make Symmetrical
brute force
2900
x526
1028E
Restore Array
constructive algorithms
2400
x1153
1028D
Order book
combinatorics
,
data structures
,
greedy
2100
x1753
1028C
Rectangles
geometry
,
implementation
,
sortings
1600
x4643
1028B
Unnatural Conditions
constructive algorithms
,
math
1200
x9275
1028A
Find Square
implementation
800
x10981
1027G
X-mouse in the Campus
bitmasks
,
math
,
number theory
2600
x317
1027F
Session in BSU
binary search
,
dfs and similar
,
dsu
,
graph matchings
,
graphs
2400
x1577
1027E
Inverse Coloring
combinatorics
,
dp
,
math
2100
x2154
1027D
Mouse Hunt
dfs and similar
,
graphs
1700
x7625
1027C
Minimum Value Rectangle
greedy
1600
x6932
1027B
Numbers on the Chessboard
implementation
,
math
1200
x8438
1027A
Palindromic Twist
implementation
,
strings
1000
x16729
1025G
Company Acquisitions
constructive algorithms
,
math
3200
x740
1025F
Disjoint Triangles
geometry
2700
x699
1025E
Colored Cubes
constructive algorithms
,
implementation
,
matrices
2700
x576
1025D
Recovering BST
brute force
,
dp
,
math
,
number theory
,
trees
2100
x3762
1025C
Plasticine zebra
constructive algorithms
,
implementation
1600
x6191
1025B
Weakened Common Divisor
brute force
,
greedy
,
number theory
1600
x8028
1025A
Doggo Recoloring
implementation
,
sortings
900
x15334
1023G
Pisces
data structures
,
flows
,
trees
3400
x129
1023F
Mobile Phone Network
dfs and similar
,
dsu
,
graphs
,
trees
2600
x897
1023E
Down or Right
constructive algorithms
,
interactive
,
matrices
2100
x2062
1023D
Array Restoration
constructive algorithms
,
data structures
1700
x4060
1023C
Bracket Subsequence
greedy
1200
x10066
1023B
Pair of Toys
math
1000
x10985
1023A
Single Wildcard Pattern Matching
brute force
,
implementation
,
strings
1200
x8765
1020B
Badge
brute force
,
dfs and similar
,
graphs
1000
x21881
1020A
New Building for SIS
math
1000
x9072
1019E
Raining season
data structures
,
divide and conquer
,
trees
3200
x343
1019D
Large Triangle
binary search
,
geometry
,
sortings
2700
x665
1019C
Sergey's problem
constructive algorithms
,
graphs
3000
x1197
1019B
The hat
binary search
,
interactive
2000
x1977
1019A
Elections
brute force
,
greedy
1700
x4666
1017H
The Films
brute force
3300
x149
1017G
The Tree
data structures
3200
x936
1017F
The Neutral Zone
brute force
,
math
2500
x839
1017E
The Supersonic Rocket
geometry
,
hashing
,
strings
2400
x1031
1017D
The Wu
bitmasks
,
brute force
,
data structures
1900
x3597
1017C
The Phone Number
constructive algorithms
,
greedy
1600
x6068
1017B
The Bits
implementation
,
math
1200
x9194
1017A
The Rank
implementation
800
x20716
1016G
Appropriate Team
bitmasks
,
math
,
number theory
2700
x273
1016F
Road Projects
dfs and similar
,
dp
,
trees
2600
x825
1016E
Rest In The Shades
binary search
,
geometry
2400
x1202
1016D
Vasya And The Matrix
constructive algorithms
,
flows
,
math
1800
x4750
1016C
Vasya And The Mushrooms
dp
,
implementation
1800
x3794
1016B
Segment Occurrences
brute force
,
implementation
1300
x9580
1016A
Death Note
greedy
,
implementation
,
math
900
x15021
1015F
Bracket Substring
dp
,
strings
2300
x1180
1015E2
Stars Drawing (Hard Edition)
binary search
,
dp
,
greedy
1900
x3683
1015E1
Stars Drawing (Easy Edition)
brute force
,
dp
,
greedy
1700
x6011
1015D
Walking Between Houses
constructive algorithms
,
greedy
1600
x8369
1015C
Songs Compression
sortings
1100
x18436
1015B
Obtaining the String
implementation
1200
x11707
1015A
Points in Segments
implementation
800
x21219
1013B
And
greedy
1200
x7750
1013A
Piles With Stones
math
800
x11025
1012F
Passports
dp
,
implementation
3400
x161
1012E
Cycle sort
dsu
,
math
3100
x333
1012D
AB-Strings
constructive algorithms
,
strings
2800
x387
1012C
Hills
dp
1900
x3544
1012B
Chemical table
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
matrices
1900
x4075
1012A
Photo of The Sky
brute force
,
implementation
,
math
,
sortings
1500
x6454
1011B
Planning The Expedition
binary search
,
brute force
,
implementation
1200
x10278
1011A
Stages
greedy
,
implementation
,
sortings
900
x12362
1010F
Tree
fft
,
graphs
,
trees
3400
x225
1010E
Store
data structures
2700
x347
1010D
Mars rover
dfs and similar
,
graphs
,
implementation
,
trees
2000
x2403
1010C
Border
number theory
1800
x4928
1010B
Rocket
binary search
,
interactive
1800
x5260
1010A
Fly
binary search
,
math
1500
x8130
1009G
Allowed Letters
bitmasks
,
flows
,
graph matchings
,
graphs
,
greedy
2400
x862
1009F
Dominant Indices
data structures
,
dsu
,
trees
2300
x6028
1009E
Intercity Travelling
combinatorics
,
math
,
probabilities
2000
x3037
1009D
Relatively Prime Graph
brute force
,
constructive algorithms
,
graphs
,
greedy
,
math
1700
x6296
1009C
Annoying Present
greedy
,
math
1700
x5319
1009B
Minimum Ternary String
greedy
,
implementation
1400
x10213
1009A
Game Shopping
implementation
800
x11860
1008B
Turn the Rectangles
greedy
,
sortings
1000
x11527
1008A
Romaji
implementation
,
strings
900
x15326
1007E
Mini Metro
dp
3400
x220
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