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Before contest
Codeforces Round 1134 (Div. 4)
37:23:30
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combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
communication
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
1906G
Grid Game 2
games
,
number theory
2900
x458
1906F
Maximize The Value
data structures
,
sortings
2100
x1864
1906E
Merge Not Sort
constructive algorithms
,
dp
1900
x2714
1906D
Spaceship Exploration
binary search
,
geometry
2800
x178
1906C
Cursed Game
interactive
3000
x310
1906B
Button Pressing
bitmasks
,
constructive algorithms
,
hashing
2600
x1000
1906A
Easy As ABC
brute force
1000
x6433
1905F
Field Should Not Be Empty
brute force
,
data structures
,
divide and conquer
2600
x828
1905E
One-X
combinatorics
,
dfs and similar
,
dp
,
math
,
trees
2400
x1362
1905D
Cyclic MEX
data structures
,
implementation
,
math
,
two pointers
2000
x4837
1905C
Largest Subsequence
greedy
,
strings
1400
x14663
1905B
Begginer's Zelda
greedy
,
trees
1100
x19166
1905A
Constructive Problems
constructive algorithms
,
math
800
x24681
1904F
Beautiful Tree
data structures
,
dfs and similar
,
graphs
,
implementation
,
trees
2800
x710
1904E
Tree Queries
data structures
,
dfs and similar
,
graphs
,
implementation
,
trees
2500
x1439
1904D2
Set To Max (Hard Version)
constructive algorithms
,
data structures
,
divide and conquer
,
greedy
,
implementation
,
sortings
1800
x5990
1904D1
Set To Max (Easy Version)
brute force
,
constructive algorithms
,
greedy
1600
x8986
1904C
Array Game
binary search
,
brute force
,
data structures
,
sortings
,
two pointers
1400
x26863
1904B
Collecting Game
binary search
,
dp
,
greedy
,
sortings
,
two pointers
1100
x32192
1904A
Forked!
brute force
,
implementation
900
x47607
1903F
Babysitting
2-sat
,
binary search
,
data structures
,
graphs
,
trees
2500
x1030
1903E
Geo Game
greedy
,
interactive
,
math
2000
x2657
1903D2
Maximum And Queries (hard version)
bitmasks
,
divide and conquer
,
dp
,
greedy
2500
x1139
1903D1
Maximum And Queries (easy version)
binary search
,
bitmasks
,
brute force
,
greedy
1700
x7545
1903C
Theofanis' Nightmare
constructive algorithms
,
greedy
1400
x15070
1903B
StORage room
bitmasks
,
brute force
,
constructive algorithms
,
greedy
1200
x15254
1903A
Halloumi Boxes
brute force
,
greedy
,
sortings
800
x96086
1902F
Trees and XOR Queries Again
data structures
,
dfs and similar
,
divide and conquer
,
graphs
,
implementation
,
math
,
trees
2400
x1612
1902E
Collapsing Strings
data structures
,
strings
,
trees
1900
x6197
1902D
Robot Queries
binary search
,
data structures
,
dp
,
implementation
1900
x5640
1902C
Insert and Equalize
brute force
,
constructive algorithms
,
greedy
,
math
,
number theory
1300
x17939
1902B
Getting Points
binary search
,
brute force
,
greedy
1100
x16842
1902A
Binary Imbalance
constructive algorithms
800
x23529
1901F
Landscaping
binary search
,
geometry
,
two pointers
2900
x285
1901E
Compressed Tree
dfs and similar
,
dp
,
graphs
,
greedy
,
sortings
,
trees
2200
x2094
1901D
Yet Another Monster Fight
binary search
,
dp
,
greedy
,
implementation
,
math
1700
x8927
1901C
Add, Divide and Floor
constructive algorithms
,
greedy
,
math
1400
x14793
1901B
Chip and Ribbon
greedy
,
math
1100
x17384
1901A
Line Trip
greedy
,
math
800
x90398
1900F
Local Deletions
binary search
,
data structures
,
implementation
2800
x415
1900E
Transitive Graph
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
2100
x2828
1900D
Small GCD
bitmasks
,
brute force
,
dp
,
math
,
number theory
2000
x5811
1900C
Anji's Binary Tree
dfs and similar
,
dp
,
trees
1300
x15727
1900B
Laura and Operations
dp
,
math
900
x21228
1900A
Cover in Water
constructive algorithms
,
greedy
,
implementation
,
strings
800
x77337
1899G
Unusual Entertainment
data structures
,
dfs and similar
,
dsu
,
shortest paths
,
sortings
,
trees
,
two pointers
1900
x4220
1899F
Alex's whims
constructive algorithms
,
graphs
,
greedy
,
shortest paths
,
trees
1600
x9872
1899E
Queue Sort
greedy
,
implementation
,
sortings
1300
x18863
1899D
Yarik and Musical Notes
hashing
,
math
,
number theory
1300
x16123
1899C
Yarik and Array
dp
,
greedy
,
two pointers
1100
x39823
1899B
250 Thousand Tons of TNT
brute force
,
implementation
,
number theory
1100
x37562
1899A
Game with Integers
games
,
math
,
number theory
800
x109479
1898F
Vova Escapes the Matrix
brute force
,
dfs and similar
,
divide and conquer
,
shortest paths
2600
x1049
1898E
Sofia and Strings
data structures
,
greedy
,
sortings
,
strings
,
two pointers
2200
x2868
1898D
Absolute Beauty
greedy
,
math
1900
x7043
1898C
Colorful Grid
constructive algorithms
1700
x6697
1898B
Milena and Admirer
greedy
,
math
1500
x15069
1898A
Milica and String
brute force
,
implementation
,
strings
800
x17642
1896H2
Cyclic Hamming (Hard Version)
brute force
,
dp
,
fft
,
math
,
number theory
3500
x177
1896H1
Cyclic Hamming (Easy Version)
brute force
,
divide and conquer
,
dp
,
fft
,
math
,
number theory
3400
x217
1896G
Pepe Racing
constructive algorithms
,
implementation
,
interactive
,
sortings
3200
x507
1896F
Bracket Xoring
constructive algorithms
,
greedy
,
implementation
,
math
2600
x1044
1896E
Permutation Sorting
data structures
,
sortings
2100
x2832
1896D
Ones and Twos
binary search
,
data structures
,
divide and conquer
,
math
,
two pointers
1700
x7218
1896C
Matching Arrays
binary search
,
constructive algorithms
,
greedy
,
sortings
1400
x12130
1896B
AB Flipping
greedy
,
strings
,
two pointers
900
x19230
1896A
Jagged Swaps
sortings
800
x69444
1895G
Two Characters, Two Colors
binary search
,
data structures
,
dp
,
flows
,
greedy
3100
x503
1895F
Fancy Arrays
combinatorics
,
dp
,
math
,
matrices
2600
x1148
1895E
Infinite Card Game
binary search
,
brute force
,
data structures
,
dfs and similar
,
dp
,
dsu
,
games
,
graphs
,
greedy
,
sortings
,
two pointers
2300
x1976
1895D
XOR Construction
bitmasks
,
constructive algorithms
,
data structures
,
math
,
string suffix structures
,
trees
1900
x7359
1895C
Torn Lucky Ticket
brute force
,
dp
,
hashing
,
implementation
,
math
1400
x13426
1895B
Points and Minimum Distance
greedy
,
math
,
sortings
800
x21802
1895A
Treasure Chest
math
800
x26286
1894B
Two Out of Three
constructive algorithms
1000
x18468
1894A
Secret Sport
implementation
,
strings
800
x20639
1893E
Cacti Symphony
combinatorics
,
dfs and similar
,
dp
,
graphs
3500
x390
1893D
Colorful Constructive
constructive algorithms
,
data structures
,
greedy
2600
x1159
1893C
Freedom of Choice
brute force
,
greedy
,
implementation
2000
x3304
1893B
Neutral Tonality
constructive algorithms
,
greedy
,
sortings
,
two pointers
1700
x12192
1893A
Anonymous Informant
brute force
,
dfs and similar
,
graphs
,
implementation
1400
x15517
1891F
A Growing Tree
data structures
,
dfs and similar
,
trees
2000
x5097
1891E
Brukhovich and Exams
brute force
,
greedy
,
implementation
,
math
,
sortings
2500
x1150
1891D
Suspicious logarithms
binary search
,
brute force
,
math
1900
x4660
1891C
Smilo and Monsters
binary search
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
1500
x22829
1891B
Deja Vu
brute force
,
math
,
sortings
1100
x32789
1891A
Sorting with Twos
constructive algorithms
,
sortings
800
x20761
1890B
Qingshan Loves Strings
constructive algorithms
,
implementation
800
x18997
1890A
Doremy's Paint 3
constructive algorithms
800
x67734
1889F
Doremy's Average Tree
data structures
,
dp
,
greedy
,
trees
3500
x227
1889E
Doremy's Swapping Trees
dfs and similar
,
graphs
,
trees
3500
x193
1889D
Game of Stacks
brute force
,
dfs and similar
,
graphs
,
implementation
,
trees
3000
x1028
1889C2
Doremy's Drying Plan (Hard Version)
data structures
,
dp
2600
x1255
1889C1
Doremy's Drying Plan (Easy Version)
brute force
,
data structures
,
dp
,
greedy
,
sortings
2000
x4040
1889B
Doremy's Connecting Plan
constructive algorithms
,
greedy
,
math
,
sortings
1700
x8830
1889A
Qingshan Loves Strings 2
constructive algorithms
,
greedy
,
implementation
1300
x15730
1887F
Minimum Segments
constructive algorithms
3400
x290
1887E
Good Colorings
binary search
,
constructive algorithms
,
graphs
,
interactive
3100
x584
1887D
Split
binary search
,
data structures
,
divide and conquer
,
dsu
,
math
,
trees
,
two pointers
2700
x1438
1887C
Minimum Array
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
hashing
,
two pointers
2400
x2428
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