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Codeforces Round (Div. 3)
4 days
→ Filter Problems
Difficulty:
—
data structures
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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Custom test
Problems
#
Name
1740E
Hanging Hearts
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
greedy
,
trees
1800
x4204
1740D
Knowledge Cards
constructive algorithms
,
data structures
1500
x7872
1739F
Keyboard Design
bitmasks
,
data structures
,
dp
,
string suffix structures
,
strings
2600
x517
1739D
Reset K Edges
binary search
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
1900
x4976
1738H
Palindrome Addicts
data structures
,
strings
3300
x232
1738D
Permutation Addicts
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
trees
1900
x3382
1737G
Ela Takes Dancing Class
binary search
,
data structures
3500
x111
1736C2
Good Subarrays (Hard Version)
binary search
,
data structures
,
dp
,
two pointers
2400
x1261
1736C1
Good Subarrays (Easy Version)
binary search
,
data structures
,
schedules
,
two pointers
1300
x14749
1735F
Pebbles and Beads
data structures
,
geometry
2900
x219
1735E
House Planning
constructive algorithms
,
data structures
,
graph matchings
,
greedy
2400
x1032
1735D
Meta-set
brute force
,
combinatorics
,
data structures
,
hashing
,
math
1700
x5384
1734D
Slime Escape
data structures
,
dp
,
greedy
,
two pointers
1800
x6152
1732E
Location
data structures
,
dp
,
math
,
number theory
2800
x420
1732D2
Balance (Hard version)
brute force
,
data structures
,
number theory
2400
x1381
1732D1
Balance (Easy version)
brute force
,
data structures
,
implementation
,
number theory
1500
x8463
1731D
Valiant's New Map
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x6907
1730F
Almost Sorted
bitmasks
,
data structures
,
dp
2700
x425
1730E
Maximums and Minimums
combinatorics
,
data structures
,
divide and conquer
,
number theory
2700
x620
1730C
Minimum Notation
data structures
,
greedy
,
math
,
sortings
1200
x16255
1730A
Planets
data structures
,
greedy
,
sortings
800
x22707
1728E
Red-Black Pepper
brute force
,
data structures
,
greedy
,
math
,
number theory
2300
x1681
1728C
Digital Logarithm
data structures
,
greedy
,
sortings
1400
x15563
1726G
A Certain Magical Party
combinatorics
,
data structures
,
greedy
,
sortings
3300
x288
1726F
Late For Work (submissions are not allowed)
data structures
,
greedy
,
schedules
,
shortest paths
2900
x131
1726C
Jatayu's Balanced Bracket Sequence
data structures
,
dsu
,
graphs
,
greedy
1300
x12165
1725L
Lemper Cooking Competition
data structures
2400
x889
1725K
Kingdom of Criticism
data structures
,
dsu
2500
x595
1725F
Field Photography
bitmasks
,
data structures
,
sortings
2100
x950
1725E
Electrical Efficiency
combinatorics
,
data structures
,
dp
,
math
,
number theory
,
trees
2500
x449
1722E
Counting Rectangles
brute force
,
data structures
,
dp
,
implementation
1600
x10367
1722C
Word Game
data structures
,
implementation
800
x30070
1720E
Misha and Paintings
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
2700
x751
1720D2
Xor-Subsequence (hard version)
bitmasks
,
data structures
,
dp
,
strings
,
trees
2400
x1775
1720B
Interesting Sum
brute force
,
data structures
,
greedy
,
math
,
sortings
800
x20895
1719C
Fighting Tournament
binary search
,
data structures
,
implementation
,
two pointers
1400
x13011
1718F
Burenka, an Array and Queries
data structures
,
math
,
number theory
3300
x147
1718D
Permutation for Burenka
data structures
,
graph matchings
,
greedy
,
math
,
trees
3300
x294
1718C
Tonya and Burenka-179
data structures
,
greedy
,
math
,
number theory
2400
x1544
1718A2
Burenka and Traditions (hard version)
data structures
,
dp
,
greedy
1900
x5089
1716E
Swap and Maximum Block
bitmasks
,
data structures
,
dfs and similar
,
divide and conquer
,
dp
2500
x1034
1716C
Robot in a Hallway
data structures
,
dp
,
greedy
,
implementation
,
ternary search
2000
x4085
1715E
Long Way Home
data structures
,
divide and conquer
,
dp
,
geometry
,
graphs
,
greedy
,
shortest paths
2400
x1642
1715C
Monoblock
combinatorics
,
data structures
,
implementation
,
math
1700
x8468
1714G
Path Prefixes
binary search
,
data structures
,
dfs and similar
,
trees
1700
x7333
1714D
Color with Occurrences
brute force
,
data structures
,
dp
,
greedy
,
strings
1600
x8872
1714B
Remove Prefix
data structures
,
greedy
,
implementation
800
x29736
1713E
Cross Swapping
2-sat
,
data structures
,
dsu
,
greedy
,
matrices
2400
x1542
1712F
Triameter
binary search
,
data structures
,
dfs and similar
,
trees
3200
x307
1712E2
LCM Sum (hard version)
brute force
,
data structures
,
math
,
number theory
,
two pointers
2500
x1225
1712D
Empty Graph
binary search
,
constructive algorithms
,
data structures
,
greedy
,
shortest paths
2000
x4368
1710B
Rain
binary search
,
brute force
,
data structures
,
geometry
,
greedy
,
implementation
,
math
2100
x2394
1709E
XOR Tree
bitmasks
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
trees
2400
x2511
1709D
Rorororobot
binary search
,
data structures
,
greedy
,
math
1700
x8216
1709B
Also Try Minecraft
data structures
,
dp
,
implementation
900
x22238
1707E
Replace
binary search
,
data structures
3500
x572
1707B
Difference Array
brute force
,
data structures
,
implementation
,
sortings
1900
x5614
1706E
Qpwoeirut and Vertices
binary search
,
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
greedy
,
trees
2300
x2446
1706D2
Chopping Carrots (Hard Version)
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
2400
x1664
1705E
Mark and Professor Koro
binary search
,
bitmasks
,
brute force
,
combinatorics
,
data structures
,
greedy
2300
x2003
1703F
Yet Another Problem About Pairs Satisfying an Inequality
binary search
,
data structures
,
dp
,
greedy
,
sortings
1300
x18954
1703D
Double Strings
brute force
,
data structures
,
strings
1100
x24896
1703B
ICPC Balloons
data structures
,
implementation
800
x46985
1702G2
Passable Paths (hard version)
data structures
,
dfs and similar
,
trees
2000
x4443
1702F
Equate Multisets
constructive algorithms
,
data structures
,
greedy
,
math
,
number theory
1700
x8130
1702C
Train and Queries
data structures
,
greedy
1100
x21789
1701F
Points
combinatorics
,
data structures
,
implementation
,
math
,
matrices
2500
x905
1701D
Permutation Restoration
binary search
,
data structures
,
greedy
,
math
,
sortings
,
two pointers
1900
x5573
1700C
Helping the Nature
constructive algorithms
,
data structures
,
greedy
1700
x10643
1699E
Three Days Grace
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
2600
x1110
1699D
Almost Triple Deletions
data structures
,
dp
,
greedy
2300
x3065
1698C
3SUM Closure
brute force
,
data structures
1300
x18175
1697C
awoo's Favorite Problem
binary search
,
constructive algorithms
,
data structures
,
greedy
,
implementation
,
strings
,
two pointers
1400
x14099
1696G
Fishingprince Plays With Array Again
brute force
,
data structures
,
geometry
,
math
3300
x269
1696D
Permutation Graph
binary search
,
constructive algorithms
,
data structures
,
divide and conquer
,
greedy
,
shortest paths
1900
x5264
1695C
Zero Path
brute force
,
data structures
,
dp
,
graphs
,
greedy
,
shortest paths
1700
x10627
1693E
Outermost Maximums
data structures
,
greedy
3400
x409
1693D
Decinc Dividing
brute force
,
data structures
,
divide and conquer
,
dp
,
greedy
2800
x795
1692H
Gambling
data structures
,
dp
,
greedy
,
math
1700
x7227
1692G
2^Sort
data structures
,
dp
,
sortings
,
two pointers
1400
x16701
1691E
Number of Groups
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
2300
x1775
1691D
Max GEQ Sum
binary search
,
constructive algorithms
,
data structures
,
divide and conquer
,
implementation
,
two pointers
1800
x5619
1690G
Count the Trains
binary search
,
data structures
,
greedy
,
sortings
2000
x3303
1690C
Restoring the Duration of Tasks
data structures
,
greedy
,
implementation
800
x25686
1689D
Lena and Matrix
data structures
,
dp
,
geometry
,
shortest paths
1900
x4086
1689B
Mystic Permutation
data structures
,
greedy
900
x17280
1687D
Cute number
binary search
,
brute force
,
data structures
,
dsu
,
implementation
,
math
2900
x565
1687C
Sanae and Giant Robot
binary search
,
brute force
,
data structures
,
dsu
,
greedy
,
sortings
2500
x1351
1685E
The Ultimate LIS Problem
data structures
,
greedy
3500
x144
1684F
Diverse Segments
data structures
,
two pointers
2600
x854
1684E
MEX vs DIFF
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
2100
x3087
1682F
MCMF?
data structures
,
flows
,
graphs
,
greedy
,
sortings
,
two pointers
2700
x302
1681F
Unique Occurrences
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
dsu
,
trees
2300
x1646
1681E
Labyrinth Adventures
data structures
,
dp
,
matrices
,
shortest paths
2600
x768
1679C
Rooks Defenders
data structures
,
implementation
1400
x10066
1679B
Stone Age Problem
data structures
,
implementation
1200
x17577
1677E
Tokitsukaze and Beautiful Subsegments
data structures
2900
x522
1677B
Tokitsukaze and Meeting
data structures
,
implementation
,
math
1700
x4086
1677A
Tokitsukaze and Strange Inequality
brute force
,
data structures
,
dp
1600
x8255
1676H2
Maximum Crossings (Hard Version)
data structures
,
divide and conquer
,
sortings
1500
x10354
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