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Before contest
Codeforces Round #956 (Div. 2) and ByteRace 2024
28:43:14
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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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Problems
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Status
Standings
Custom test
Problems
#
Name
1837B
Comparison String
greedy
900
x27706
1837A
Grasshopper on a Line
constructive algorithms
,
math
800
x30422
1836B
Astrophysicists
greedy
,
math
1100
x12429
1836A
Destroyer
implementation
,
sortings
800
x20029
1835F
Good Graph
bitmasks
,
dfs and similar
,
graph matchings
,
graphs
,
implementation
3500
x157
1835E
Old Mobile
combinatorics
,
dp
,
probabilities
3500
x218
1835D
Doctor's Brown Hypothesis
dfs and similar
,
graphs
,
math
,
number theory
2900
x462
1835C
Twin Clusters
bitmasks
,
brute force
,
constructive algorithms
,
math
,
probabilities
2600
x951
1835B
Lottery
binary search
,
brute force
,
greedy
,
math
,
two pointers
2500
x921
1835A
k-th equality
brute force
,
implementation
,
math
1700
x7597
1834F
Typewriter
brute force
,
math
2500
x498
1834E
MEX of LCM
binary search
,
data structures
,
implementation
,
math
,
number theory
2300
x2117
1834D
Survey in Class
brute force
,
data structures
,
greedy
,
implementation
,
sortings
1900
x4478
1834C
Game with Reversing
games
,
greedy
,
math
,
strings
1200
x12923
1834B
Maximum Strength
greedy
,
math
1000
x14834
1834A
Unit Array
greedy
,
math
800
x22582
1833G
Ksyusha and Chinchilla
constructive algorithms
,
dfs and similar
,
dp
,
dsu
,
greedy
,
implementation
,
trees
1800
x5122
1833F
Ira and Flamenco
combinatorics
,
constructive algorithms
,
data structures
,
implementation
,
math
,
sortings
,
two pointers
1700
x6993
1833E
Round Dance
dfs and similar
,
dsu
,
graphs
,
shortest paths
1600
x10988
1833D
Flipper
brute force
,
constructive algorithms
,
greedy
1400
x12970
1833C
Vlad Building Beautiful Array
greedy
,
math
800
x25764
1833B
Restore the Weather
greedy
,
sortings
900
x25815
1833A
Musical Puzzle
implementation
,
strings
800
x32031
1832F
Zombies
binary search
,
dp
3200
x259
1832E
Combinatorics Problem
brute force
,
combinatorics
,
dp
2200
x2097
1832D2
Red-Blue Operations (Hard Version)
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
2400
x1838
1832D1
Red-Blue Operations (Easy Version)
binary search
,
greedy
,
implementation
,
math
2100
x2849
1832C
Contrast Value
greedy
,
implementation
1200
x19198
1832B
Maximum Sum
brute force
,
sortings
,
two pointers
1100
x20520
1832A
New Palindrome
strings
800
x25165
1831B
Array merging
constructive algorithms
,
greedy
1000
x19417
1831A
Twin Permutations
constructive algorithms
800
x25215
1830F
The Third Grace
data structures
,
dp
3200
x238
1830E
Bully Sort
data structures
,
math
3500
x235
1830D
Mex Tree
brute force
,
dp
,
trees
2800
x621
1830C
Hyperregular Bracket Strings
combinatorics
,
greedy
,
hashing
,
math
,
number theory
,
sortings
2400
x1571
1830B
The BOSS Can Count Pairs
brute force
,
math
2000
x4709
1830A
Copil Copac Draws Trees
dfs and similar
,
dp
,
graphs
,
trees
1400
x12877
1829H
Don't Blame Me
bitmasks
,
combinatorics
,
dp
,
math
1700
x7353
1829G
Hits Different
data structures
,
dp
,
implementation
,
math
1600
x9803
1829F
Forever Winter
dfs and similar
,
graphs
,
math
1300
x16697
1829E
The Lakes
dfs and similar
,
dsu
,
graphs
,
implementation
1100
x18971
1829D
Gold Rush
brute force
,
dfs and similar
,
dp
,
implementation
1000
x25084
1829C
Mr. Perfectly Fine
bitmasks
,
greedy
,
implementation
800
x27728
1829B
Blank Space
implementation
800
x42692
1829A
Love Story
implementation
,
strings
800
x47968
1828B
Permutation Swap
math
,
number theory
900
x21591
1828A
Divisible Array
constructive algorithms
,
math
800
x23258
1827F
Copium Permutation
constructive algorithms
,
data structures
,
greedy
3500
x113
1827E
Bus Routes
binary search
,
constructive algorithms
,
dfs and similar
,
greedy
,
trees
3400
x371
1827D
Two Centroids
data structures
,
dfs and similar
,
greedy
,
trees
2800
x723
1827C
Palindrome Partition
binary search
,
brute force
,
data structures
,
dp
,
hashing
,
strings
2600
x1163
1827B2
Range Sorting (Hard Version)
binary search
,
data structures
,
dp
,
greedy
2400
x1801
1827B1
Range Sorting (Easy Version)
binary search
,
dp
,
dsu
,
greedy
,
trees
,
two pointers
2000
x3740
1827A
Counting Orders
combinatorics
,
math
,
sortings
,
two pointers
1100
x18085
1826F
Fading into Fog
geometry
,
interactive
,
math
,
probabilities
2800
x343
1826E
Walk the Runway
bitmasks
,
brute force
,
data structures
,
dp
,
graphs
,
implementation
,
sortings
2400
x1534
1826D
Running Miles
brute force
,
dp
,
greedy
1700
x9012
1826C
Dreaming of Freedom
greedy
,
math
,
number theory
1300
x13092
1826B
Lunatic Never Content
math
,
number theory
1100
x16491
1826A
Trust Nobody
brute force
,
greedy
,
implementation
,
sortings
1200
x14762
1825B
LuoTianyi and the Table
greedy
,
math
1000
x14373
1825A
LuoTianyi and the Palindrome String
greedy
,
strings
800
x19437
1824E
LuoTianyi and Cartridge
data structures
,
trees
3500
x127
1824D
LuoTianyi and the Function
data structures
3000
x468
1824C
LuoTianyi and XOR-Tree
data structures
,
dfs and similar
,
dp
,
dsu
,
greedy
,
trees
2500
x1277
1824B2
LuoTianyi and the Floating Islands (Hard Version)
combinatorics
,
dfs and similar
,
math
,
probabilities
,
trees
2300
x2531
1824B1
LuoTianyi and the Floating Islands (Easy Version)
combinatorics
,
math
,
probabilities
,
trees
1800
x4418
1824A
LuoTianyi and the Show
greedy
,
implementation
1400
x11012
1823F
Random Walk
dp
,
graphs
,
math
,
probabilities
,
trees
2600
x816
1823E
Removing Graph
brute force
,
dp
,
games
,
graphs
,
math
2500
x1206
1823D
Unique Palindromes
constructive algorithms
,
math
,
strings
1900
x3727
1823C
Strongly Composite
greedy
,
math
,
number theory
1300
x11913
1823B
Sort with Step
brute force
,
math
,
sortings
900
x15652
1823A
A-characteristic
combinatorics
,
constructive algorithms
,
math
800
x15937
1822G2
Magic Triples (Hard Version)
brute force
,
data structures
,
math
,
number theory
2200
x2358
1822G1
Magic Triples (Easy Version)
brute force
,
data structures
,
math
,
number theory
1700
x6782
1822F
Gardening Friends
brute force
,
dfs and similar
,
dp
,
graphs
,
trees
1700
x5789
1822E
Making Anti-Palindromes
greedy
,
math
,
strings
1600
x10031
1822D
Super-Permutation
constructive algorithms
,
math
1200
x16188
1822C
Bun Lover
math
800
x22559
1822B
Karina and Array
greedy
,
math
,
sortings
800
x24348
1822A
TubeTube Feed
brute force
,
implementation
800
x23906
1821F
Timber
combinatorics
,
dp
,
fft
,
math
2600
x723
1821E
Rearrange Brackets
brute force
,
dp
,
greedy
,
sortings
,
strings
2100
x2303
1821D
Black Cells
binary search
,
brute force
,
greedy
,
math
1900
x4848
1821C
Tear It Apart
brute force
,
implementation
,
math
,
strings
1300
x13880
1821B
Sort the Subarray
brute force
,
greedy
1100
x17609
1821A
Matching
combinatorics
,
math
800
x19554
1820B
JoJo's Incredible Adventures
math
,
strings
,
two pointers
1100
x13904
1820A
Yura's New Name
implementation
,
strings
800
x16492
1819F
Willy-nilly, Crack, Into Release!
data structures
,
dp
3500
x129
1819E
Roads in E City
interactive
,
math
,
probabilities
,
trees
3200
x274
1819D
Misha and Apples
brute force
,
data structures
,
dp
,
two pointers
2800
x609
1819C
The Fox and the Complete Tree Traversal
constructive algorithms
,
dp
,
implementation
,
math
,
trees
2400
x1420
1819B
The Butcher
geometry
,
greedy
,
implementation
,
sortings
,
two pointers
1900
x3487
1819A
Constructive Problem
brute force
,
greedy
1300
x12315
1818B
Indivisible
constructive algorithms
900
x14411
1818A
Politics
greedy
,
implementation
800
x12792
1817F
Entangled Substrings
string suffix structures
,
strings
3500
x186
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