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Rayan
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Before contest
Codeforces Round 1006 (Div. 3)
19:53:14
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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
729B
Spotlights
dp
,
implementation
1200
x8094
729A
Interview with Oleg
implementation
,
strings
900
x7606
727F
Polycarp's problems
binary search
,
dp
,
greedy
2300
x838
727E
Games on a CD
data structures
,
hashing
,
string suffix structures
,
strings
2300
x1310
727D
T-shirts Distribution
constructive algorithms
,
flows
,
greedy
1800
x1915
727C
Guess the Array
constructive algorithms
,
interactive
,
math
1400
x7714
727B
Bill Total Value
expression parsing
,
implementation
,
strings
1600
x2036
727A
Transformation: from A to B
brute force
,
dfs and similar
,
math
1000
x14597
725G
Messages on a Tree
3300
x166
725F
Family Photos
games
,
greedy
2900
x546
725E
Too Much Money
brute force
,
greedy
2600
x676
725D
Contest Balloons
data structures
,
greedy
1800
x2833
725C
Hidden Word
brute force
,
constructive algorithms
,
implementation
,
strings
1600
x2707
725B
Food on the Plane
implementation
,
math
1200
x5176
725A
Jumping Ball
implementation
1000
x7196
724G
Xor-matic Number of the Graph
bitmasks
,
graphs
,
math
,
number theory
,
trees
2600
x1108
724F
Uniformly Branched Trees
combinatorics
,
dp
,
trees
2700
x471
724E
Goods transportation
dp
,
flows
,
greedy
2900
x1388
724D
Dense Subsequence
data structures
,
greedy
,
strings
1900
x2353
724C
Ray Tracing
greedy
,
hashing
,
implementation
,
math
,
number theory
,
sortings
1800
x2155
724B
Batch Sort
brute force
,
greedy
,
implementation
,
math
1500
x4028
724A
Checking the Calendar
implementation
1000
x7148
723F
st-Spanning Tree
dsu
,
graphs
,
greedy
,
implementation
2300
x1529
723E
One-Way Reform
constructive algorithms
,
dfs and similar
,
flows
,
graphs
,
greedy
2200
x2040
723D
Lakes in Berland
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
1600
x7076
723C
Polycarp at the Radio
greedy
1600
x4826
723B
Text Document Analysis
expression parsing
,
implementation
,
strings
1100
x10278
723A
The New Year: Meeting Friends
implementation
,
math
,
sortings
800
x83913
722F
Cyclic Cipher
chinese remainder theorem
,
data structures
,
implementation
,
number theory
,
two pointers
2800
x551
722E
Research Rover
combinatorics
,
dp
2900
x906
722D
Generating Sets
binary search
,
data structures
,
dfs and similar
,
greedy
,
strings
,
trees
1900
x3212
722C
Destroying Array
data structures
,
dsu
1600
x9792
722B
Verse Pattern
implementation
,
strings
1200
x6546
722A
Broken Clock
brute force
,
implementation
1300
x6673
721E
Road to Home
binary search
,
dp
2700
x310
721D
Maxim and Array
constructive algorithms
,
data structures
,
greedy
,
math
2000
x2373
721C
Journey
dp
,
graphs
1800
x6014
721B
Passwords
implementation
,
math
,
sortings
,
strings
1100
x12155
721A
One-dimensional Japanese Crossword
implementation
800
x18733
720F
Array Covering
data structures
3100
x180
720E
Cipher
implementation
3100
x66
720D
Slalom
data structures
,
dp
,
sortings
3100
x308
720C
Homework
constructive algorithms
3100
x144
720B
Cactusophobia
dfs and similar
,
flows
2400
x411
720A
Closing ceremony
greedy
2000
x871
719B
Anatoly and Cockroaches
greedy
1400
x8548
719A
Vitya in the Countryside
implementation
1100
x15786
718E
Matvey's Birthday
bitmasks
,
graphs
3300
x373
718D
Andrew and Chemistry
dp
,
hashing
,
trees
2900
x432
718C
Sasha and Array
data structures
,
math
,
matrices
2300
x4009
718A
Efim and Strange Grade
dp
,
implementation
,
math
1700
x4411
717I
Cowboy Beblop at his computer
geometry
2800
x211
717H
Pokermon League challenge
math
,
probabilities
2400
x441
717G
Underfail
flows
2400
x682
717F
Heroes of Making Magic III
data structures
2600
x343
717E
Paint it really, really dark gray
dfs and similar
1900
x1513
717D
Dexterina’s Lab
games
,
matrices
,
probabilities
1900
x1465
717C
Potions Homework
implementation
,
sortings
1200
x4048
717B
R3D3’s Summer Adventure
dp
,
greedy
2700
x162
717A
Festival Organization
combinatorics
,
math
,
number theory
2900
x382
716B
Complete the Word
greedy
,
two pointers
1300
x12354
716A
Crazy Computer
implementation
800
x22858
715E
Complete the Permutations
combinatorics
,
fft
,
graphs
,
math
3400
x365
715D
Create a Maze
constructive algorithms
3100
x319
715C
Digit Tree
dfs and similar
,
divide and conquer
,
dsu
,
trees
2700
x2216
715B
Complete The Graph
binary search
,
constructive algorithms
,
graphs
,
shortest paths
2300
x2988
715A
Plus and Square Root
constructive algorithms
,
math
1600
x5657
714B
Filya and Homework
implementation
,
sortings
1200
x14759
714A
Meeting of Old Friends
implementation
,
math
1100
x10844
713E
Sonya Partymaker
binary search
,
dp
3300
x362
713D
Animals and Puzzle
binary search
,
data structures
2700
x1184
713C
Sonya and Problem Wihtout a Legend
dp
,
sortings
2300
x5704
713B
Searching Rectangles
binary search
,
constructive algorithms
,
interactive
2200
x1470
713A
Sonya and Queries
data structures
,
implementation
1400
x8541
712E
Memory and Casinos
data structures
,
math
,
probabilities
2500
x633
712D
Memory and Scores
combinatorics
,
dp
,
math
2200
x1864
712C
Memory and De-Evolution
greedy
,
math
1600
x5973
712B
Memory and Trident
implementation
,
strings
1100
x9878
712A
Memory and Crow
implementation
,
math
800
x12011
711E
ZS and The Birthday Paradox
math
,
number theory
,
probabilities
2300
x1295
711D
Directed Roads
combinatorics
,
dfs and similar
,
graphs
,
math
1900
x4573
711C
Coloring Trees
dp
1700
x8486
711B
Chris and Magic Square
constructive algorithms
,
implementation
1400
x8457
711A
Bus to Udayland
brute force
,
implementation
800
x29902
710F
String Set Queries
brute force
,
data structures
,
hashing
,
interactive
,
string suffix structures
,
strings
2400
x2006
710E
Generate a String
dfs and similar
,
dp
2000
x5305
710D
Two Arithmetic Progressions
math
,
number theory
2500
x1401
710C
Magic Odd Square
constructive algorithms
,
math
1500
x5203
710B
Optimal Point on a Line
brute force
,
sortings
1400
x9022
710A
King Moves
implementation
800
x14028
709B
Checkpoints
greedy
,
implementation
,
sortings
1500
x4779
709A
Juicer
implementation
900
x33612
708E
Student's Camp
dp
,
math
3100
x1034
708D
Incorrect Flow
flows
2900
x807
708C
Centroids
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2300
x3519
708B
Recover the String
constructive algorithms
,
greedy
,
implementation
,
math
1900
x3277
708A
Letters Cyclic Shift
constructive algorithms
,
greedy
,
implementation
,
strings
1200
x9163
707E
Garlands
data structures
2400
x1242
707D
Persistent Bookcase
bitmasks
,
data structures
,
dfs and similar
,
implementation
2200
x2772
707C
Pythagorean Triples
math
,
number theory
1500
x12828
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