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Good Bye 2024: 2025 is NEAR
3 days
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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
#
Name
1732C2
Sheikh (Hard Version)
binary search
,
bitmasks
,
brute force
,
greedy
,
implementation
,
two pointers
2100
x2642
1732C1
Sheikh (Easy version)
binary search
,
bitmasks
,
greedy
,
two pointers
1800
x6054
1732B
Ugu
brute force
,
dp
,
greedy
,
implementation
900
x15370
1732A
Bestie
brute force
,
combinatorics
,
constructive algorithms
,
implementation
,
math
,
number theory
1000
x15332
1731F
Function Sum
brute force
,
combinatorics
,
dp
,
fft
,
math
2500
x711
1731E
Graph Cost
dp
,
greedy
,
math
,
number theory
2000
x2913
1731D
Valiant's New Map
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x7320
1731C
Even Subarrays
bitmasks
,
brute force
,
hashing
,
math
,
number theory
1700
x9841
1731B
Kill Demodogs
greedy
,
math
1100
x18937
1731A
Joey Takes Money
greedy
,
math
800
x22753
1730F
Almost Sorted
bitmasks
,
data structures
,
dp
2700
x568
1730E
Maximums and Minimums
combinatorics
,
data structures
,
divide and conquer
,
number theory
2700
x657
1730D
Prefixes and Suffixes
constructive algorithms
,
strings
,
two pointers
2200
x2748
1730C
Minimum Notation
data structures
,
greedy
,
math
,
sortings
1200
x16728
1730B
Meeting on the Line
binary search
,
geometry
,
greedy
,
implementation
,
math
,
ternary search
1600
x13123
1730A
Planets
data structures
,
greedy
,
sortings
800
x23244
1729G
Cut Substrings
combinatorics
,
dp
,
hashing
,
strings
,
two pointers
2100
x2244
1729F
Kirei and the Linear Function
hashing
,
math
1900
x4208
1729E
Guess the Cycle Size
interactive
,
probabilities
1800
x7137
1729D
Friends and the Restaurant
greedy
,
sortings
,
two pointers
1200
x21528
1729C
Jumping on Tiles
constructive algorithms
,
strings
1100
x20299
1729B
Decode String
greedy
,
strings
800
x30561
1729A
Two Elevators
math
800
x41200
1728G
Illumination
binary search
,
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
,
two pointers
2700
x492
1728F
Fishermen
flows
,
graph matchings
,
greedy
3100
x435
1728E
Red-Black Pepper
brute force
,
data structures
,
greedy
,
math
,
number theory
2300
x1769
1728D
Letter Picking
constructive algorithms
,
dp
,
games
,
two pointers
1800
x7390
1728C
Digital Logarithm
data structures
,
greedy
,
sortings
1400
x16142
1728B
Best Permutation
constructive algorithms
,
greedy
800
x20218
1728A
Colored Balls: Revisited
brute force
,
greedy
,
implementation
,
sortings
800
x24773
1726H
Mainak and the Bleeding Polygon
binary search
,
geometry
,
implementation
,
math
3500
x88
1726G
A Certain Magical Party
combinatorics
,
data structures
,
greedy
,
sortings
3300
x322
1726F
Late For Work (submissions are not allowed)
data structures
,
greedy
,
schedules
,
shortest paths
2900
x131
1726E
Almost Perfect
combinatorics
,
fft
,
math
2400
x1444
1726D
Edge Split
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
probabilities
,
trees
2000
x3770
1726C
Jatayu's Balanced Bracket Sequence
data structures
,
dsu
,
graphs
,
greedy
1300
x12496
1726B
Mainak and Interesting Sequence
bitmasks
,
constructive algorithms
,
math
1100
x15434
1726A
Mainak and Array
greedy
,
math
900
x22832
1725M
Moving Both Hands
dp
,
graphs
,
shortest paths
1800
x3209
1725L
Lemper Cooking Competition
data structures
2400
x948
1725K
Kingdom of Criticism
data structures
,
dsu
2500
x691
1725J
Journey
dp
,
trees
2500
x403
1725I
Imitating the Key Tree
combinatorics
,
dsu
,
trees
2800
x229
1725H
Hot Black Hot White
constructive algorithms
,
math
1800
x2680
1725G
Garage
binary search
,
geometry
,
math
1500
x5998
1725F
Field Photography
bitmasks
,
data structures
,
sortings
2100
x1005
1725E
Electrical Efficiency
combinatorics
,
data structures
,
dp
,
math
,
number theory
,
trees
2500
x504
1725D
Deducing Sortability
binary search
,
bitmasks
,
math
2900
x130
1725C
Circular Mirror
binary search
,
combinatorics
,
geometry
,
math
,
two pointers
2000
x1664
1725B
Basketball Together
binary search
,
greedy
,
sortings
1000
x14947
1725A
Accumulation of Dominoes
math
800
x9404
1722G
Even-Odd XOR
bitmasks
,
constructive algorithms
,
greedy
1500
x11695
1722F
L-shapes
dfs and similar
,
implementation
1700
x7119
1722E
Counting Rectangles
brute force
,
data structures
,
dp
,
implementation
1600
x11204
1722D
Line
greedy
,
sortings
1100
x23840
1722C
Word Game
data structures
,
implementation
800
x31769
1722B
Colourblindness
implementation
800
x47711
1722A
Spell Check
implementation
800
x52880
1721F
Matching Reduction
brute force
,
constructive algorithms
,
dfs and similar
,
flows
,
graph matchings
,
graphs
,
interactive
2800
x409
1721E
Prefix Function Queries
dfs and similar
,
dp
,
hashing
,
string suffix structures
,
strings
,
trees
2200
x2045
1721D
Maximum AND
bitmasks
,
dfs and similar
,
divide and conquer
,
greedy
,
sortings
1800
x6780
1721C
Min-Max Array Transformation
binary search
,
greedy
,
two pointers
1400
x13530
1721B
Deadly Laser
implementation
1000
x22443
1721A
Image
greedy
,
implementation
800
x27182
1720E
Misha and Paintings
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
2700
x820
1720D2
Xor-Subsequence (hard version)
bitmasks
,
data structures
,
dp
,
strings
,
trees
2400
x1924
1720D1
Xor-Subsequence (easy version)
bitmasks
,
brute force
,
dp
,
strings
,
trees
,
two pointers
1800
x6096
1720C
Corners
greedy
,
implementation
1200
x17007
1720B
Interesting Sum
brute force
,
data structures
,
greedy
,
math
,
sortings
800
x21347
1720A
Burenka Plays with Fractions
math
,
number theory
900
x22608
1719C
Fighting Tournament
binary search
,
data structures
,
implementation
,
two pointers
1400
x13418
1719B
Mathematical Circus
constructive algorithms
,
math
800
x18612
1719A
Chip Game
games
,
math
800
x25703
1718F
Burenka, an Array and Queries
data structures
,
math
,
number theory
3300
x165
1718E
Impressionism
constructive algorithms
,
graphs
,
implementation
,
math
3500
x121
1718D
Permutation for Burenka
data structures
,
graph matchings
,
greedy
,
math
,
trees
3300
x316
1718C
Tonya and Burenka-179
data structures
,
greedy
,
math
,
number theory
2400
x1648
1718B
Fibonacci Strings
greedy
,
implementation
,
math
,
number theory
2000
x3065
1718A2
Burenka and Traditions (hard version)
data structures
,
dp
,
greedy
1900
x5359
1718A1
Burenka and Traditions (easy version)
dp
,
greedy
1800
x5875
1717F
Madoka and The First Session
constructive algorithms
,
flows
,
graph matchings
,
graphs
,
implementation
2500
x539
1717E
Madoka and The Best University
math
,
number theory
2200
x2792
1717D
Madoka and The Corruption Scheme
combinatorics
,
constructive algorithms
,
greedy
,
math
1900
x4465
1717C
Madoka and Formal Statement
greedy
1300
x14804
1717B
Madoka and Underground Competitions
constructive algorithms
,
implementation
1100
x14934
1717A
Madoka and Strange Thoughts
math
,
number theory
800
x19627
1716F
Bags with Balls
combinatorics
,
dp
,
math
,
number theory
2500
x1098
1716E
Swap and Maximum Block
bitmasks
,
data structures
,
dfs and similar
,
divide and conquer
,
dp
2500
x1110
1716D
Chip Move
brute force
,
dp
,
math
2000
x5364
1716C
Robot in a Hallway
data structures
,
dp
,
greedy
,
implementation
,
ternary search
2000
x4255
1716B
Permutation Chain
constructive algorithms
,
math
800
x21484
1716A
2-3 Moves
greedy
,
math
800
x33312
1715F
Crop Squares
constructive algorithms
,
geometry
,
interactive
,
math
2700
x532
1715E
Long Way Home
data structures
,
divide and conquer
,
dp
,
geometry
,
graphs
,
greedy
,
shortest paths
2400
x1775
1715D
2+ doors
2-sat
,
bitmasks
,
graphs
,
greedy
1900
x5236
1715C
Monoblock
combinatorics
,
data structures
,
implementation
,
math
1700
x8760
1715B
Beautiful Array
constructive algorithms
,
greedy
,
math
1000
x22656
1715A
Crossmarket
constructive algorithms
,
greedy
,
math
800
x23643
1714G
Path Prefixes
binary search
,
data structures
,
dfs and similar
,
trees
1700
x7775
1714F
Build a Tree and That Is It
constructive algorithms
,
implementation
,
trees
1900
x3304
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