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Codeforces Round (Div. 2)
5 days
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combine-tags-by-or
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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
2067C
Devyatkino
brute force
,
greedy
,
math
x5441
2067B
Two Large Bags
dp
,
greedy
,
sortings
x8660
2067A
Adjacent Digit Sums
math
x14978
2066F
Curse
constructive algorithms
,
dp
,
math
x5
2066E
Tropical Season
data structures
,
greedy
,
implementation
x52
2066D2
Club of Young Aircraft Builders (hard version)
combinatorics
,
dp
x121
2066D1
Club of Young Aircraft Builders (easy version)
combinatorics
,
dp
,
math
x462
2066C
Bitwise Slides
bitmasks
,
combinatorics
,
dp
,
math
x760
2066B
White Magic
constructive algorithms
,
greedy
,
implementation
x1596
2066A
Object Identification
graphs
,
implementation
,
interactive
x2760
2065H
Bro Thinks He's Him
combinatorics
,
data structures
,
divide and conquer
,
dp
,
math
,
matrices
x1000
2065G
Skibidus and Capping
math
,
number theory
x2817
2065F
Skibidus and Slay
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
x3448
2065E
Skibidus and Rizz
constructive algorithms
,
greedy
,
strings
x6300
2065D
Skibidus and Sigma
sortings
x12761
2065C2
Skibidus and Fanum Tax (hard version)
binary search
,
greedy
x11150
2065C1
Skibidus and Fanum Tax (easy version)
binary search
,
greedy
x18037
2065B
Skibidus and Ohio
strings
x27156
2065A
Skibidus and Amog'u
brute force
,
constructive algorithms
,
implementation
,
strings
x35842
2063F2
Counting Is Not Fun (Hard Version)
combinatorics
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
implementation
,
trees
2700
x525
2063F1
Counting Is Not Fun (Easy Version)
combinatorics
,
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
,
hashing
,
implementation
,
math
,
trees
2400
x935
2063E
Triangle Tree
data structures
,
dfs and similar
,
dp
,
greedy
,
trees
2300
x1568
2063D
Game With Triangles
binary search
,
brute force
,
data structures
,
geometry
,
greedy
,
implementation
,
math
,
ternary search
,
two pointers
2000
x3384
2063C
Remove Exactly Two
brute force
,
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
sortings
,
trees
1600
x9914
2063B
Subsequence Update
constructive algorithms
,
data structures
,
greedy
,
sortings
1100
x18305
2063A
Minimal Coprime
math
,
number theory
800
x25371
2062H
Galaxy Generator
bitmasks
,
combinatorics
,
dp
3500
x71
2062G
Permutation Factory
flows
,
geometry
,
graph matchings
,
graphs
3500
x69
2062F
Traveling Salescat
constructive algorithms
,
dp
,
geometry
,
graphs
,
greedy
,
math
,
sortings
2900
x371
2062E2
The Game (Hard Version)
data structures
,
dfs and similar
,
games
,
graphs
,
implementation
,
trees
3000
x277
2062E1
The Game (Easy Version)
data structures
,
dfs and similar
,
games
,
graphs
,
greedy
,
trees
2000
x3153
2062D
Balanced Tree
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2200
x2550
2062C
Cirno and Operations
brute force
,
math
1200
x13785
2062B
Clockwork
greedy
,
math
900
x17952
2062A
String
constructive algorithms
,
greedy
,
math
,
strings
800
x22407
2061I
Kevin and Nivek
divide and conquer
,
dp
3500
x42
2061H2
Kevin and Stones (Hard Version)
flows
,
graphs
3500
x20
2061H1
Kevin and Stones (Easy Version)
flows
,
graph matchings
,
graphs
3500
x52
2061G
Kevin and Teams
constructive algorithms
,
graphs
,
interactive
2900
x338
2061F2
Kevin and Binary String (Hard Version)
data structures
,
dp
3500
x92
2061F1
Kevin and Binary String (Easy Version)
greedy
,
implementation
2100
x1646
2061E
Kevin and And
bitmasks
,
brute force
,
dp
,
greedy
,
math
,
sortings
2000
x2767
2061D
Kevin and Numbers
bitmasks
,
data structures
1600
x7613
2061C
Kevin and Puzzle
2-sat
,
combinatorics
,
dp
1600
x6818
2061B
Kevin and Geometry
binary search
,
geometry
1100
x11602
2061A
Kevin and Arithmetic
math
800
x18177
2060G
Bugged Sort
dp
,
greedy
,
sortings
2400
x731
2060F
Multiplicative Arrays
combinatorics
,
dp
,
number theory
2200
x1586
2060E
Graph Composition
dfs and similar
,
dsu
,
graphs
,
greedy
1500
x7863
2060D
Subtract Min Sort
greedy
1100
x20396
2060C
Game of Mathletes
games
,
greedy
,
sortings
,
two pointers
900
x23537
2060B
Farmer John's Card Game
greedy
,
sortings
1000
x21685
2060A
Fibonacciness
brute force
800
x32312
2059E2
Stop Gaming (Hard Version)
brute force
,
constructive algorithms
,
data structures
,
hashing
,
strings
x210
2059E1
Stop Gaming (Easy Version)
brute force
,
constructive algorithms
,
greedy
,
hashing
,
strings
x563
2059D
Graph and Graph
data structures
,
graphs
,
greedy
,
shortest paths
x4394
2059C
Customer Service
brute force
,
constructive algorithms
,
graph matchings
,
greedy
,
math
,
sortings
x8857
2059B
Cost of the Array
brute force
,
constructive algorithms
,
greedy
,
math
x14100
2059A
Milya and Two Arrays
constructive algorithms
,
greedy
,
sortings
x24315
2057H
Coffee Break
data structures
,
greedy
,
math
3500
x131
2057G
Secret Message
constructive algorithms
,
dfs and similar
,
math
3000
x499
2057F
Formation
binary search
,
data structures
,
dp
,
sortings
,
two pointers
3300
x188
2057E2
Another Exercise on Graphs (hard version)
binary search
,
dfs and similar
,
dp
,
dsu
,
graphs
,
shortest paths
,
sortings
2500
x1425
2057E1
Another Exercise on Graphs (Easy Version)
binary search
,
brute force
,
dp
,
dsu
,
graphs
,
shortest paths
,
sortings
2300
x1979
2057D
Gifts Order
data structures
,
greedy
,
implementation
,
math
,
matrices
2000
x4233
2057C
Trip to the Olympiad
bitmasks
,
constructive algorithms
,
greedy
,
math
1500
x10993
2057B
Gorilla and the Exam
greedy
,
sortings
1000
x18889
2057A
MEX Table
constructive algorithms
,
math
800
x24511
2056F2
Xor of Median (Hard Version)
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
3000
x144
2056F1
Xor of Median (Easy Version)
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
2700
x210
2056E
Nested Segments
combinatorics
,
dfs and similar
,
dp
,
dsu
,
math
2500
x663
2056D
Unique Median
binary search
,
brute force
,
combinatorics
,
data structures
,
divide and conquer
,
dp
2200
x2553
2056C
Palindromic Subsequences
brute force
,
constructive algorithms
,
math
1200
x14892
2056B
Find the Permutation
brute force
,
dfs and similar
,
graphs
,
implementation
,
sortings
1300
x14230
2056A
Shape Perimeter
constructive algorithms
,
math
800
x23382
2055F
Cosmic Divide
brute force
,
geometry
,
hashing
,
math
,
strings
3200
x56
2055E
Haystacks
brute force
,
constructive algorithms
,
data structures
,
greedy
,
sortings
2800
x311
2055D
Scarecrow
greedy
,
implementation
,
math
2000
x3480
2055C
The Trail
brute force
,
constructive algorithms
,
greedy
,
math
,
two pointers
1400
x13634
2055B
Crafting
constructive algorithms
,
greedy
,
sortings
1000
x22184
2055A
Two Frogs
constructive algorithms
,
games
,
greedy
,
math
800
x28389
2053I2
Affectionate Arrays (Hard Version)
data structures
,
dp
,
graphs
,
greedy
,
math
,
shortest paths
,
two pointers
3500
x39
2053I1
Affectionate Arrays (Easy Version)
data structures
,
dp
,
greedy
2800
x372
2053H
Delicate Anti-monotonous Operations
constructive algorithms
,
implementation
3500
x44
2053G
Naive String Splits
binary search
,
brute force
,
greedy
,
hashing
,
math
,
number theory
,
strings
3400
x168
2053F
Earnest Matrix Complement
brute force
,
data structures
,
dp
,
greedy
,
implementation
,
math
2600
x758
2053E
Resourceful Caterpillar Sequence
dfs and similar
,
dp
,
games
,
graphs
,
greedy
,
trees
1900
x3543
2053D
Refined Product Optimality
binary search
,
data structures
,
greedy
,
math
,
schedules
,
sortings
1700
x6290
2053C
Bewitching Stargazer
bitmasks
,
divide and conquer
,
dp
,
math
1500
x9856
2053B
Outstanding Impressionist
binary search
,
brute force
,
data structures
,
greedy
1200
x14059
2053A
Tender Carpenter
dp
,
geometry
,
greedy
,
math
800
x19152
2052M
Managing Cluster
dp
,
graphs
,
math
,
trees
2700
x270
2052L
Legacy Screensaver
2900
x91
2052K
Knowns and Unknowns
2800
x74
2052J
Judicious Watching
binary search
,
greedy
,
sortings
2000
x946
2052I
Incompetent Delivery Guy
graphs
,
shortest paths
2800
x90
2052H
Hunting Hoglins in Hogwarts
interactive
3500
x37
2052G
Geometric Balance
data structures
,
geometry
,
implementation
2800
x139
2052F
Fix Flooded Floor
constructive algorithms
,
dp
,
graphs
1700
x2006
2052E
Expression Correction
brute force
,
expression parsing
,
strings
1900
x978
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