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Pinely Round 4 (Div. 1 + Div. 2)
14:07:11
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Difficulty:
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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
1741E
Sending a Sequence Over the Network
dp
1600
x11489
1741D
Masha and a Beautiful Tree
dfs and similar
,
divide and conquer
,
graphs
,
sortings
,
trees
1300
x14896
1740E
Hanging Hearts
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
greedy
,
trees
1800
x4232
1740D
Knowledge Cards
constructive algorithms
,
data structures
1500
x7945
1740C
Bricks and Bags
constructive algorithms
,
games
,
greedy
,
sortings
1400
x10858
1739D
Reset K Edges
binary search
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
1900
x5020
1739C
Card Game
combinatorics
,
constructive algorithms
,
dp
,
games
1500
x8918
1738D
Permutation Addicts
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
trees
1900
x3392
1738C
Even Number Addicts
dp
,
games
,
greedy
,
math
1500
x10941
1737C
Ela and Crickets
constructive algorithms
,
games
,
implementation
,
math
1500
x5666
1737B
Ela's Fitness and the Luxury Number
binary search
,
implementation
,
math
1300
x9304
1736C1
Good Subarrays (Easy Version)
binary search
,
data structures
,
schedules
,
two pointers
1300
x14796
1735D
Meta-set
brute force
,
combinatorics
,
data structures
,
hashing
,
math
1700
x5413
1735C
Phase Shift
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
strings
1400
x9748
1734D
Slime Escape
data structures
,
dp
,
greedy
,
two pointers
1800
x6186
1733D1
Zero-One (Easy Version)
constructive algorithms
,
greedy
,
math
1400
x13215
1733C
Parity Shuffle Sorting
constructive algorithms
,
sortings
1300
x15385
1732D1
Balance (Easy version)
brute force
,
data structures
,
implementation
,
number theory
1500
x8512
1732C1
Sheikh (Easy version)
binary search
,
bitmasks
,
greedy
,
two pointers
1800
x5746
1731D
Valiant's New Map
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x6974
1731C
Even Subarrays
bitmasks
,
brute force
,
hashing
,
math
,
number theory
1700
x9286
1730B
Meeting on the Line
binary search
,
geometry
,
greedy
,
implementation
,
math
,
ternary search
1600
x12328
1729F
Kirei and the Linear Function
hashing
,
math
1900
x4091
1729E
Guess the Cycle Size
interactive
,
probabilities
1800
x6894
1728D
Letter Picking
constructive algorithms
,
dp
,
games
,
two pointers
1800
x7061
1728C
Digital Logarithm
data structures
,
greedy
,
sortings
1400
x15634
1726C
Jatayu's Balanced Bracket Sequence
data structures
,
dsu
,
graphs
,
greedy
1300
x12208
1725M
Moving Both Hands
dp
,
graphs
,
shortest paths
1800
x3026
1725H
Hot Black Hot White
constructive algorithms
,
math
1800
x2551
1725G
Garage
binary search
,
geometry
,
math
1500
x5747
1722G
Even-Odd XOR
bitmasks
,
constructive algorithms
,
greedy
1500
x10900
1722F
L-shapes
dfs and similar
,
implementation
1700
x6754
1722E
Counting Rectangles
brute force
,
data structures
,
dp
,
implementation
1600
x10486
1721D
Maximum AND
bitmasks
,
dfs and similar
,
divide and conquer
,
greedy
,
sortings
1800
x6496
1721C
Min-Max Array Transformation
binary search
,
greedy
,
two pointers
1400
x13170
1720D1
Xor-Subsequence (easy version)
bitmasks
,
brute force
,
dp
,
strings
,
trees
,
two pointers
1800
x5854
1719C
Fighting Tournament
binary search
,
data structures
,
implementation
,
two pointers
1400
x13052
1718A2
Burenka and Traditions (hard version)
data structures
,
dp
,
greedy
1900
x5116
1718A1
Burenka and Traditions (easy version)
dp
,
greedy
1800
x5633
1717D
Madoka and The Corruption Scheme
combinatorics
,
constructive algorithms
,
greedy
,
math
1900
x4335
1717C
Madoka and Formal Statement
greedy
1300
x14486
1715D
2+ doors
2-sat
,
bitmasks
,
graphs
,
greedy
1900
x5038
1715C
Monoblock
combinatorics
,
data structures
,
implementation
,
math
1700
x8500
1714G
Path Prefixes
binary search
,
data structures
,
dfs and similar
,
trees
1700
x7378
1714F
Build a Tree and That Is It
constructive algorithms
,
implementation
,
trees
1900
x3157
1714E
Add Modulo 10
brute force
,
math
,
number theory
1400
x15986
1714D
Color with Occurrences
brute force
,
data structures
,
dp
,
greedy
,
strings
1600
x8925
1713D
Tournament Countdown
constructive algorithms
,
greedy
,
interactive
,
number theory
,
probabilities
1800
x5570
1711B
Party
brute force
,
graphs
1300
x13253
1710A
Color the Picture
constructive algorithms
,
greedy
,
math
1500
x10761
1709D
Rorororobot
binary search
,
data structures
,
greedy
,
math
1700
x8258
1709C
Recover an RBS
constructive algorithms
,
greedy
,
implementation
,
strings
1800
x8687
1707B
Difference Array
brute force
,
data structures
,
implementation
,
sortings
1900
x5638
1707A
Doremy's IQ
binary search
,
constructive algorithms
,
greedy
,
implementation
1600
x13276
1706D1
Chopping Carrots (Easy Version)
binary search
,
brute force
,
constructive algorithms
,
greedy
,
number theory
1700
x6813
1706C
Qpwoeirut And The City
dp
,
flows
,
greedy
,
implementation
1400
x14647
1705D
Mark and Lightbulbs
combinatorics
,
constructive algorithms
,
greedy
,
math
,
sortings
1800
x6223
1705C
Mark and His Unfinished Essay
brute force
,
implementation
1400
x13176
1704D
Magical Array
constructive algorithms
,
hashing
,
implementation
,
math
1900
x4964
1703G
Good Key, Bad Key
bitmasks
,
brute force
,
dp
,
greedy
,
math
1600
x10383
1703F
Yet Another Problem About Pairs Satisfying an Inequality
binary search
,
data structures
,
dp
,
greedy
,
sortings
1300
x19160
1702G1
Passable Paths (easy version)
dfs and similar
,
trees
1900
x5291
1702F
Equate Multisets
constructive algorithms
,
data structures
,
greedy
,
math
,
number theory
1700
x8203
1702E
Split Into Two Sets
dfs and similar
,
dsu
,
graphs
1600
x12881
1701D
Permutation Restoration
binary search
,
data structures
,
greedy
,
math
,
sortings
,
two pointers
1900
x5596
1701C
Schedule Management
binary search
,
greedy
,
implementation
,
two pointers
1400
x16393
1700D
River Locks
binary search
,
dp
,
greedy
,
math
1900
x5959
1700C
Helping the Nature
constructive algorithms
,
data structures
,
greedy
1700
x10730
1699C
The Third Problem
combinatorics
,
constructive algorithms
,
math
1700
x9616
1698D
Fixed Point Guessing
binary search
,
constructive algorithms
,
interactive
1600
x8981
1698C
3SUM Closure
brute force
,
data structures
1300
x18276
1697D
Guess The String
binary search
,
constructive algorithms
,
interactive
1900
x4361
1697C
awoo's Favorite Problem
binary search
,
constructive algorithms
,
data structures
,
greedy
,
implementation
,
strings
,
two pointers
1400
x14162
1696D
Permutation Graph
binary search
,
constructive algorithms
,
data structures
,
divide and conquer
,
greedy
,
shortest paths
1900
x5366
1696C
Fishingprince Plays With Array
constructive algorithms
,
greedy
,
implementation
,
math
1400
x11475
1695C
Zero Path
brute force
,
data structures
,
dp
,
graphs
,
greedy
,
shortest paths
1700
x10707
1693B
Fake Plastic Trees
dfs and similar
,
dp
,
greedy
,
trees
1700
x8285
1693A
Directional Increase
greedy
1300
x15923
1692H
Gambling
data structures
,
dp
,
greedy
,
math
1700
x7277
1692G
2^Sort
data structures
,
dp
,
sortings
,
two pointers
1400
x16898
1692F
3SUM
brute force
,
math
1300
x22105
1691D
Max GEQ Sum
binary search
,
constructive algorithms
,
data structures
,
divide and conquer
,
implementation
,
two pointers
1800
x5673
1691C
Sum of Substrings
brute force
,
constructive algorithms
,
greedy
,
math
,
strings
1400
x15363
1690F
Shifting String
graphs
,
math
,
number theory
,
strings
1700
x6988
1690E
Price Maximization
binary search
,
greedy
,
math
,
two pointers
1500
x14902
1689D
Lena and Matrix
data structures
,
dp
,
geometry
,
shortest paths
1900
x4115
1689C
Infected Tree
dfs and similar
,
dp
,
trees
1600
x10961
1688C
Manipulating History
constructive algorithms
,
greedy
,
strings
1700
x8048
1687B
Railway System
constructive algorithms
,
graphs
,
greedy
,
interactive
,
sortings
1700
x3555
1687A
The Enchanted Forest
brute force
,
greedy
1600
x10207
1684D
Traps
constructive algorithms
,
greedy
,
sortings
1700
x9501
1684C
Column Swapping
brute force
,
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x12189
1682C
LIS or Reverse LIS?
constructive algorithms
,
greedy
,
implementation
,
math
1400
x14472
1681D
Required Length
brute force
,
dfs and similar
,
dp
,
hashing
,
shortest paths
1700
x9470
1680C
Binary String
binary search
,
greedy
,
strings
,
two pointers
1600
x9749
1679D
Toss a Coin to Your Graph...
binary search
,
dfs and similar
,
dp
,
graphs
1900
x4694
1679C
Rooks Defenders
data structures
,
implementation
1400
x10116
1678B2
Tokitsukaze and Good 01-String (hard version)
dp
,
greedy
,
implementation
1800
x6502
1677C
Tokitsukaze and Two Colorful Tapes
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
1900
x3502
1677B
Tokitsukaze and Meeting
data structures
,
implementation
,
math
1700
x4107
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