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Rayan
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Before contest
Codeforces Round 1006 (Div. 3)
41:15:20
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*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
1102A
Integer Sequence Dividing
math
800
x25027
1101G
(Zero XOR Subset)-less
math
,
matrices
2300
x1780
1101F
Trucks and Cities
binary search
,
dp
2400
x1418
1101E
Polycarp's New Job
implementation
1500
x7988
1101D
GCD Counting
data structures
,
dfs and similar
,
dp
,
number theory
,
trees
2000
x4857
1101C
Division and Union
sortings
1500
x8583
1101B
Accordion
greedy
,
implementation
1300
x10690
1101A
Minimum Integer
math
1000
x17684
1100F
Ivan and Burgers
data structures
,
divide and conquer
,
greedy
,
math
2500
x2705
1100E
Andrew and Taxi
binary search
,
dfs and similar
,
graphs
2200
x2427
1100D
Dasha and Chess
constructive algorithms
,
games
,
interactive
2500
x882
1100C
NN and the Optical Illusion
binary search
,
geometry
,
math
1200
x10282
1100B
Build a Contest
data structures
,
implementation
1300
x11319
1100A
Roman and Browser
implementation
1000
x10295
1099F
Cookies
binary search
,
data structures
,
dfs and similar
,
dp
,
games
,
trees
2400
x970
1099C
Postcard
constructive algorithms
,
implementation
1200
x9818
1099B
Squares and Segments
binary search
,
constructive algorithms
,
math
1100
x11251
1099A
Snowball
implementation
800
x13031
1098F
Ж-function
string suffix structures
,
strings
3500
x246
1098E
Fedya the Potter
binary search
,
implementation
,
math
,
number theory
3400
x251
1098D
Eels
data structures
2800
x812
1098C
Construct a tree
binary search
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2400
x1104
1098B
Nice table
brute force
,
constructive algorithms
,
greedy
,
math
2100
x1717
1098A
Sum in the tree
constructive algorithms
,
dfs and similar
,
greedy
,
trees
1600
x8974
1097H
Mateusz and an Infinite Sequence
bitmasks
,
brute force
,
dp
,
strings
3400
x97
1097G
Vladislav and a Great Legend
combinatorics
,
dp
,
trees
3000
x831
1097F
Alex and a TV Show
bitmasks
,
combinatorics
,
number theory
2500
x1290
1097E
Egor and an RPG game
constructive algorithms
,
greedy
3400
x491
1097D
Makoto and a Blackboard
dp
,
math
,
number theory
,
probabilities
2200
x2929
1097C
Yuhao and a Parenthesis
greedy
,
implementation
1400
x8509
1097B
Petr and a Combination Lock
bitmasks
,
brute force
,
dp
1200
x30495
1097A
Gennady and a Card Game
brute force
,
implementation
800
x40124
1096G
Lucky Tickets
divide and conquer
,
dp
,
fft
2400
x1601
1096F
Inversion Expectation
dp
,
math
,
probabilities
2300
x1846
1096E
The Top Scorer
combinatorics
,
dp
,
math
,
probabilities
2500
x1086
1096D
Easy Problem
dp
1800
x8369
1096C
Polygon for the Angle
brute force
,
geometry
1600
x6903
1096B
Substring Removal
combinatorics
,
math
,
strings
1300
x10782
1096A
Find Divisible
greedy
,
implementation
,
math
800
x19000
1095F
Make It Connected
dsu
,
graphs
,
greedy
1900
x6494
1095E
Almost Regular Bracket Sequence
implementation
1900
x4203
1095D
Circular Dance
implementation
1600
x7670
1095C
Powers Of Two
bitmasks
,
greedy
1400
x17568
1095B
Array Stabilization
implementation
900
x22568
1095A
Repeating Cipher
implementation
800
x33100
1093G
Multidimensional Queries
bitmasks
,
data structures
2300
x2003
1093F
Vasya and Array
dp
2400
x1043
1093E
Intersection of Permutations
data structures
2400
x1681
1093D
Beautiful Graph
dfs and similar
,
graphs
1700
x9670
1093C
Mishka and the Last Exam
greedy
1300
x9486
1093B
Letters Rearranging
constructive algorithms
,
greedy
,
sortings
,
strings
900
x16845
1093A
Dice Rolling
math
800
x17851
1092F
Tree with Maximum Cost
dfs and similar
,
dp
,
trees
1900
x8672
1092E
Minimal Diameter Forest
constructive algorithms
,
dfs and similar
,
greedy
,
trees
2000
x1798
1092D2
Great Vova Wall (Version 2)
data structures
,
implementation
2200
x3091
1092D1
Great Vova Wall (Version 1)
greedy
,
implementation
,
math
2200
x5007
1092C
Prefixes and Suffixes
strings
1700
x6001
1092B
Teams Forming
sortings
800
x27018
1092A
Uniform String
implementation
800
x16476
1091H
New Year and the Tricolore Recreation
games
3200
x438
1091G
New Year and the Factorisation Collaboration
interactive
,
math
,
number theory
3200
x214
1091F
New Year and the Mallard Expedition
constructive algorithms
,
greedy
2600
x842
1091E
New Year and the Acquaintance Estimation
binary search
,
data structures
,
graphs
,
greedy
,
implementation
,
math
,
sortings
2400
x1023
1091D
New Year and the Permutation Concatenation
combinatorics
,
dp
,
math
1700
x6896
1091C
New Year and the Sphere Transmission
math
,
number theory
1400
x10161
1091B
New Year and the Treasure Geolocation
brute force
,
constructive algorithms
,
greedy
,
implementation
1200
x10745
1091A
New Year and the Christmas Ornament
brute force
,
implementation
,
math
800
x17900
1090M
The Pleasant Walk
implementation
1000
x6575
1090L
Berland University
greedy
,
math
2000
x1344
1090K
Right Expansion Of The Mind
math
2000
x1125
1090J
Two Prefixes
strings
2600
x463
1090I
Minimal Product
2000
x1120
1090H
Linearization
graphs
2900
x101
1090G
Combostone
games
,
implementation
2500
x111
1090F
How to Learn You Score
constructive algorithms
,
interactive
2600
x333
1090E
Horseback Riding
flows
,
graphs
2300
x620
1090D
Similar Arrays
constructive algorithms
1800
x2171
1090C
New Year Presents
constructive algorithms
,
data structures
2400
x522
1090B
LaTeX Expert
1900
x1481
1090A
Company Merging
greedy
1300
x4351
1089M
Minegraphed
constructive algorithms
,
graphs
2400
x623
1089L
Lazyland
900
x4137
1089K
King Kog's Reception
data structures
2400
x1155
1089J
JS Minification
greedy
,
implementation
3200
x135
1089I
Interval-Free Permutations
combinatorics
2600
x393
1089H
Harder Satisfiability
2-sat
,
dfs and similar
,
graphs
3400
x116
1089G
Guest Student
math
1500
x3026
1089F
Fractions
math
1900
x2030
1089E
Easy Chess
constructive algorithms
1700
x2049
1089D
Distance Sum
graphs
3100
x101
1089C
Cactus Search
interactive
2500
x437
1089B
Bimatching
graphs
3200
x237
1089A
Alice the Fan
dp
2200
x1207
1088F
Ehab and a weird weight formula
data structures
,
trees
2800
x537
1088E
Ehab and a component choosing problem
dp
,
greedy
,
math
,
trees
2400
x1529
1088D
Ehab and another another xor problem
bitmasks
,
constructive algorithms
,
implementation
,
interactive
2000
x2926
1088C
Ehab and a 2-operation task
constructive algorithms
,
greedy
,
math
1400
x8263
1088B
Ehab and subtraction
implementation
,
sortings
1000
x12762
1088A
Ehab and another construction problem
brute force
,
constructive algorithms
800
x17096
1086F
Forest Fires
math
3500
x272
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