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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
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number theory
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shortest paths
sortings
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strings
ternary search
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Problems
#
Name
1906C
Cursed Game
interactive
3000
x161
1906B
Button Pressing
bitmasks
,
constructive algorithms
,
hashing
2600
x454
1906A
Easy As ABC
brute force
1000
x3520
1905F
Field Should Not Be Empty
brute force
,
data structures
,
divide and conquer
2600
x451
1905E
One-X
combinatorics
,
dfs and similar
,
dp
,
math
,
trees
2400
x849
1905D
Cyclic MEX
data structures
,
implementation
,
math
,
two pointers
2000
x3489
1905C
Largest Subsequence
greedy
,
strings
1400
x11015
1905B
Begginer's Zelda
greedy
,
trees
1100
x15239
1905A
Constructive Problems
constructive algorithms
,
math
800
x21763
1904F
Beautiful Tree
data structures
,
dfs and similar
,
graphs
,
implementation
,
trees
2800
x308
1904E
Tree Queries
data structures
,
dfs and similar
,
graphs
,
implementation
,
trees
2500
x817
1904D2
Set To Max (Hard Version)
constructive algorithms
,
data structures
,
divide and conquer
,
greedy
,
implementation
,
sortings
1800
x3795
1904D1
Set To Max (Easy Version)
brute force
,
constructive algorithms
,
greedy
1600
x5658
1904C
Array Game
binary search
,
brute force
,
data structures
,
sortings
,
two pointers
1400
x10566
1904B
Collecting Game
binary search
,
dp
,
greedy
,
sortings
,
two pointers
1100
x12807
1904A
Forked!
brute force
,
implementation
900
x15803
1903F
Babysitting
2-sat
,
binary search
,
data structures
,
graphs
,
trees
2500
x554
1903E
Geo Game
greedy
,
interactive
,
math
2000
x1795
1903D2
Maximum And Queries (hard version)
bitmasks
,
divide and conquer
,
dp
,
greedy
2500
x705
1903D1
Maximum And Queries (easy version)
binary search
,
bitmasks
,
brute force
,
greedy
1700
x5052
1903C
Theofanis' Nightmare
constructive algorithms
,
greedy
1400
x10355
1903B
StORage room
bitmasks
,
brute force
,
constructive algorithms
,
greedy
1200
x11323
1903A
Halloumi Boxes
brute force
,
greedy
,
sortings
800
x24022
1902F
Trees and XOR Queries Again
data structures
,
dfs and similar
,
divide and conquer
,
graphs
,
implementation
,
math
,
trees
2400
x893
1902E
Collapsing Strings
data structures
,
strings
,
trees
1900
x3736
1902D
Robot Queries
binary search
,
data structures
,
dp
,
implementation
1900
x3658
1902C
Insert and Equalize
brute force
,
constructive algorithms
,
greedy
,
math
,
number theory
1300
x12214
1902B
Getting Points
binary search
,
brute force
,
greedy
1100
x13295
1902A
Binary Imbalance
constructive algorithms
800
x19728
1901F
Landscaping
binary search
,
geometry
,
two pointers
2900
x143
1901E
Compressed Tree
dfs and similar
,
dp
,
graphs
,
greedy
,
sortings
,
trees
2200
x1363
1901D
Yet Another Monster Fight
binary search
,
dp
,
greedy
,
implementation
,
math
1700
x6149
1901C
Add, Divide and Floor
constructive algorithms
,
greedy
,
math
1400
x10658
1901B
Chip and Ribbon
greedy
,
math
1100
x13986
1901A
Line Trip
greedy
,
math
800
x25139
1900F
Local Deletions
binary search
,
data structures
,
implementation
2800
x260
1900E
Transitive Graph
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
2100
x1805
1900D
Small GCD
bitmasks
,
brute force
,
dp
,
math
,
number theory
2000
x3688
1900C
Anji's Binary Tree
dfs and similar
,
dp
,
trees
1300
x10401
1900B
Laura and Operations
dp
,
math
900
x15955
1900A
Cover in Water
constructive algorithms
,
greedy
,
implementation
,
strings
800
x21820
1899G
Unusual Entertainment
data structures
,
dfs and similar
,
dsu
,
shortest paths
,
sortings
,
trees
,
two pointers
1900
x2907
1899F
Alex's whims
constructive algorithms
,
graphs
,
greedy
,
shortest paths
,
trees
1600
x6643
1899E
Queue Sort
greedy
,
implementation
,
sortings
1300
x13884
1899D
Yarik and Musical Notes
hashing
,
math
,
number theory
1300
x12183
1899C
Yarik and Array
dp
,
greedy
,
two pointers
1100
x18090
1899B
250 Thousand Tons of TNT
brute force
,
implementation
,
number theory
1100
x18053
1899A
Game with Integers
games
,
math
,
number theory
800
x37742
1898F
Vova Escapes the Matrix
brute force
,
dfs and similar
,
divide and conquer
,
shortest paths
2600
x734
1898E
Sofia and Strings
data structures
,
greedy
,
sortings
,
strings
,
two pointers
2200
x2041
1898D
Absolute Beauty
greedy
,
math
1900
x4712
1898C
Colorful Grid
constructive algorithms
1700
x4896
1898B
Milena and Admirer
greedy
,
math
1500
x10452
1898A
Milica and String
brute force
,
implementation
,
strings
800
x15039
1896H2
Cyclic Hamming (Hard Version)
brute force
,
dp
,
fft
,
math
,
number theory
3500
x87
1896H1
Cyclic Hamming (Easy Version)
brute force
,
divide and conquer
,
dp
,
fft
,
math
,
number theory
3400
x78
1896G
Pepe Racing
constructive algorithms
,
implementation
,
interactive
,
sortings
3200
x303
1896F
Bracket Xoring
constructive algorithms
,
greedy
,
implementation
,
math
2600
x649
1896E
Permutation Sorting
data structures
,
sortings
2100
x2009
1896D
Ones and Twos
binary search
,
data structures
,
divide and conquer
,
math
,
two pointers
1700
x5168
1896C
Matching Arrays
binary search
,
constructive algorithms
,
greedy
,
sortings
1400
x8589
1896B
AB Flipping
greedy
,
strings
,
two pointers
900
x13349
1896A
Jagged Swaps
sortings
800
x18620
1895G
Two Characters, Two Colors
binary search
,
data structures
,
dp
,
flows
,
greedy
3100
x171
1895F
Fancy Arrays
combinatorics
,
dp
,
math
,
matrices
2600
x625
1895E
Infinite Card Game
binary search
,
brute force
,
data structures
,
dfs and similar
,
dp
,
dsu
,
games
,
graphs
,
greedy
,
sortings
,
two pointers
2300
x1454
1895D
XOR Construction
bitmasks
,
constructive algorithms
,
data structures
,
math
,
string suffix structures
,
trees
1900
x5562
1895C
Torn Lucky Ticket
brute force
,
dp
,
hashing
,
implementation
,
math
1400
x10087
1895B
Points and Minimum Distance
greedy
,
math
,
sortings
800
x19631
1895A
Treasure Chest
math
800
x23401
1894B
Two Out of Three
constructive algorithms
1000
x14696
1894A
Secret Sport
implementation
,
strings
800
x18092
1893E
Cacti Symphony
combinatorics
,
dfs and similar
,
dp
,
graphs
3500
x179
1893D
Colorful Constructive
constructive algorithms
,
data structures
,
greedy
2600
x816
1893C
Freedom of Choice
brute force
,
greedy
,
implementation
2000
x2433
1893B
Neutral Tonality
constructive algorithms
,
greedy
,
sortings
,
two pointers
1700
x8063
1893A
Anonymous Informant
brute force
,
dfs and similar
,
graphs
,
implementation
1400
x11239
1891F
A Growing Tree
data structures
,
dfs and similar
,
trees
2000
x3369
1891E
Brukhovich and Exams
brute force
,
greedy
,
implementation
,
math
,
sortings
2500
x771
1891D
Suspicious logarithms
binary search
,
brute force
,
math
1900
x3701
1891C
Smilo and Monsters
binary search
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
1500
x11271
1891B
Deja Vu
brute force
,
math
,
sortings
1100
x15728
1891A
Sorting with Twos
constructive algorithms
,
sortings
800
x18351
1890B
Qingshan Loves Strings
constructive algorithms
,
implementation
800
x16632
1890A
Doremy's Paint 3
constructive algorithms
800
x21404
1889F
Doremy's Average Tree
data structures
,
dp
,
greedy
,
trees
3500
x68
1889E
Doremy's Swapping Trees
dfs and similar
,
graphs
,
trees
3500
x84
1889D
Game of Stacks
brute force
,
dfs and similar
,
graphs
,
implementation
,
trees
3000
x518
1889C2
Doremy's Drying Plan (Hard Version)
data structures
,
dp
2600
x888
1889C1
Doremy's Drying Plan (Easy Version)
brute force
,
data structures
,
dp
,
greedy
,
sortings
2000
x3006
1889B
Doremy's Connecting Plan
constructive algorithms
,
greedy
,
math
,
sortings
1700
x6736
1889A
Qingshan Loves Strings 2
constructive algorithms
,
greedy
,
implementation
1300
x11999
1887F
Minimum Segments
constructive algorithms
3400
x112
1887E
Good Colorings
binary search
,
constructive algorithms
,
graphs
,
interactive
3100
x330
1887D
Split
binary search
,
data structures
,
divide and conquer
,
dsu
,
math
,
trees
,
two pointers
2700
x813
1887C
Minimum Array
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
hashing
,
two pointers
2400
x1572
1887B
Time Travel
binary search
,
graphs
,
shortest paths
1900
x2680
1886F
Diamond Theft
data structures
,
greedy
3300
x158
1886E
I Wanna be the Team Leader
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
math
,
sortings
,
two pointers
2400
x1333
1886D
Monocarp and the Set
combinatorics
,
data structures
,
math
2100
x3319
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