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Before contest
Codeforces Round #956 (Div. 2) and ByteRace 2024
23:21:36
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Difficulty:
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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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Custom test
Problems
#
Name
1722E
Counting Rectangles
brute force
,
data structures
,
dp
,
implementation
1600
x10360
1722D
Line
greedy
,
sortings
1100
x22650
1722C
Word Game
data structures
,
implementation
800
x30057
1722B
Colourblindness
implementation
800
x44272
1722A
Spell Check
implementation
800
x48404
1721F
Matching Reduction
brute force
,
constructive algorithms
,
dfs and similar
,
flows
,
graph matchings
,
graphs
,
interactive
2800
x372
1721E
Prefix Function Queries
dfs and similar
,
dp
,
hashing
,
string suffix structures
,
strings
,
trees
2200
x1846
1721D
Maximum AND
bitmasks
,
dfs and similar
,
divide and conquer
,
greedy
,
sortings
1800
x6462
1721C
Min-Max Array Transformation
binary search
,
greedy
,
two pointers
1400
x13114
1721B
Deadly Laser
implementation
1000
x21742
1721A
Image
greedy
,
implementation
800
x26769
1720E
Misha and Paintings
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
2700
x750
1720D2
Xor-Subsequence (hard version)
bitmasks
,
data structures
,
dp
,
strings
,
trees
2400
x1774
1720D1
Xor-Subsequence (easy version)
bitmasks
,
brute force
,
dp
,
strings
,
trees
,
two pointers
1800
x5826
1720C
Corners
greedy
,
implementation
1200
x16502
1720B
Interesting Sum
brute force
,
data structures
,
greedy
,
math
,
sortings
800
x20892
1720A
Burenka Plays with Fractions
math
,
number theory
900
x22015
1719C
Fighting Tournament
binary search
,
data structures
,
implementation
,
two pointers
1400
x13007
1719B
Mathematical Circus
constructive algorithms
,
math
800
x18377
1719A
Chip Game
games
,
math
800
x25146
1718F
Burenka, an Array and Queries
data structures
,
math
,
number theory
3300
x147
1718E
Impressionism
constructive algorithms
,
graphs
,
implementation
,
math
3500
x105
1718D
Permutation for Burenka
data structures
,
graph matchings
,
greedy
,
math
,
trees
3300
x294
1718C
Tonya and Burenka-179
data structures
,
greedy
,
math
,
number theory
2400
x1543
1718B
Fibonacci Strings
greedy
,
implementation
,
math
,
number theory
2000
x2921
1718A2
Burenka and Traditions (hard version)
data structures
,
dp
,
greedy
1900
x5087
1718A1
Burenka and Traditions (easy version)
dp
,
greedy
1800
x5598
1717F
Madoka and The First Session
constructive algorithms
,
flows
,
graph matchings
,
graphs
,
implementation
2500
x521
1717E
Madoka and The Best University
math
,
number theory
2200
x2549
1717D
Madoka and The Corruption Scheme
combinatorics
,
constructive algorithms
,
greedy
,
math
1900
x4316
1717C
Madoka and Formal Statement
greedy
1300
x14431
1717B
Madoka and Underground Competitions
constructive algorithms
,
implementation
1100
x14580
1717A
Madoka and Strange Thoughts
math
,
number theory
800
x19273
1716F
Bags with Balls
combinatorics
,
dp
,
math
,
number theory
2500
x1012
1716E
Swap and Maximum Block
bitmasks
,
data structures
,
dfs and similar
,
divide and conquer
,
dp
2500
x1034
1716D
Chip Move
brute force
,
dp
,
math
2000
x5072
1716C
Robot in a Hallway
data structures
,
dp
,
greedy
,
implementation
,
ternary search
2000
x4083
1716B
Permutation Chain
constructive algorithms
,
math
800
x21295
1716A
2-3 Moves
greedy
,
math
800
x32218
1715F
Crop Squares
constructive algorithms
,
geometry
,
interactive
,
math
2700
x510
1715E
Long Way Home
data structures
,
divide and conquer
,
dp
,
geometry
,
graphs
,
greedy
,
shortest paths
2400
x1641
1715D
2+ doors
2-sat
,
bitmasks
,
graphs
,
greedy
1900
x5015
1715C
Monoblock
combinatorics
,
data structures
,
implementation
,
math
1700
x8468
1715B
Beautiful Array
constructive algorithms
,
greedy
,
math
1000
x20778
1715A
Crossmarket
constructive algorithms
,
greedy
,
math
800
x23322
1714G
Path Prefixes
binary search
,
data structures
,
dfs and similar
,
trees
1700
x7331
1714F
Build a Tree and That Is It
constructive algorithms
,
implementation
,
trees
1900
x3138
1714E
Add Modulo 10
brute force
,
math
,
number theory
1400
x15819
1714D
Color with Occurrences
brute force
,
data structures
,
dp
,
greedy
,
strings
1600
x8865
1714C
Minimum Varied Number
greedy
800
x30560
1714B
Remove Prefix
data structures
,
greedy
,
implementation
800
x29725
1714A
Everyone Loves to Sleep
implementation
,
math
900
x29053
1713F
Lost Array
bitmasks
,
combinatorics
,
constructive algorithms
,
dp
,
math
2900
x520
1713E
Cross Swapping
2-sat
,
data structures
,
dsu
,
greedy
,
matrices
2400
x1541
1713D
Tournament Countdown
constructive algorithms
,
greedy
,
interactive
,
number theory
,
probabilities
1800
x5544
1713C
Build Permutation
constructive algorithms
,
dp
,
math
1200
x17003
1713B
Optimal Reduction
constructive algorithms
,
sortings
1000
x20918
1713A
Traveling Salesman Problem
geometry
,
greedy
,
implementation
800
x21756
1712F
Triameter
binary search
,
data structures
,
dfs and similar
,
trees
3200
x307
1712E2
LCM Sum (hard version)
brute force
,
data structures
,
math
,
number theory
,
two pointers
2500
x1224
1712E1
LCM Sum (easy version)
binary search
,
brute force
,
combinatorics
,
math
,
number theory
,
two pointers
2300
x2085
1712D
Empty Graph
binary search
,
constructive algorithms
,
data structures
,
greedy
,
shortest paths
2000
x4367
1712C
Sort Zero
greedy
,
sortings
1100
x19442
1712B
Woeful Permutation
constructive algorithms
,
greedy
,
number theory
800
x21389
1712A
Wonderful Permutation
greedy
,
implementation
800
x23857
1711B
Party
brute force
,
graphs
1300
x13221
1711A
Perfect Permutation
constructive algorithms
800
x24929
1710E
Two Arrays
binary search
,
games
,
graph matchings
2400
x483
1710D
Recover the Tree
constructive algorithms
,
trees
3400
x413
1710C
XOR Triangle
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
greedy
,
math
2500
x1298
1710B
Rain
binary search
,
brute force
,
data structures
,
geometry
,
greedy
,
implementation
,
math
2100
x2393
1710A
Color the Picture
constructive algorithms
,
greedy
,
math
1500
x10730
1709F
Multiset of Strings
bitmasks
,
brute force
,
dp
,
fft
,
flows
,
graphs
,
math
,
meet-in-the-middle
,
trees
2500
x538
1709E
XOR Tree
bitmasks
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
trees
2400
x2508
1709D
Rorororobot
binary search
,
data structures
,
greedy
,
math
1700
x8216
1709C
Recover an RBS
constructive algorithms
,
greedy
,
implementation
,
strings
1800
x8645
1709B
Also Try Minecraft
data structures
,
dp
,
implementation
900
x22159
1709A
Three Doors
brute force
,
greedy
,
implementation
,
math
800
x29273
1708B
Difference of GCDs
constructive algorithms
,
math
1100
x19985
1708A
Difference Operations
greedy
,
math
800
x21578
1707F
Bugaboo
bitmasks
,
constructive algorithms
,
dp
,
number theory
3500
x146
1707E
Replace
binary search
,
data structures
3500
x572
1707D
Partial Virtual Trees
combinatorics
,
dfs and similar
,
dp
,
math
,
trees
3000
x592
1707C
DFS Trees
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
,
trees
2400
x1412
1707B
Difference Array
brute force
,
data structures
,
implementation
,
sortings
1900
x5614
1707A
Doremy's IQ
binary search
,
constructive algorithms
,
greedy
,
implementation
1600
x13162
1706E
Qpwoeirut and Vertices
binary search
,
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
greedy
,
trees
2300
x2443
1706D2
Chopping Carrots (Hard Version)
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
2400
x1664
1706D1
Chopping Carrots (Easy Version)
binary search
,
brute force
,
constructive algorithms
,
greedy
,
number theory
1700
x6766
1706C
Qpwoeirut And The City
dp
,
flows
,
greedy
,
implementation
1400
x14590
1706B
Making Towers
dp
,
greedy
,
math
1100
x16310
1706A
Another String Minimization Problem
2-sat
,
constructive algorithms
,
greedy
,
string suffix structures
,
strings
800
x22673
1705F
Mark and the Online Exam
bitmasks
,
constructive algorithms
,
interactive
,
probabilities
2900
x588
1705E
Mark and Professor Koro
binary search
,
bitmasks
,
brute force
,
combinatorics
,
data structures
,
greedy
2300
x2003
1705D
Mark and Lightbulbs
combinatorics
,
constructive algorithms
,
greedy
,
math
,
sortings
1800
x6200
1705C
Mark and His Unfinished Essay
brute force
,
implementation
1400
x13118
1705B
Mark the Dust Sweeper
constructive algorithms
,
greedy
,
implementation
900
x22409
1705A
Mark the Photographer
greedy
,
sortings
800
x24936
1704H2
Game of AI (hard version)
combinatorics
,
fft
,
math
3500
x79
1704H1
Game of AI (easy version)
combinatorics
,
constructive algorithms
,
dp
,
fft
,
math
3200
x176
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