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Pinely Round 4 (Div. 1 + Div. 2)
14:05:56
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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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Problems
#
Name
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
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
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
1703G
Good Key, Bad Key
bitmasks
,
brute force
,
dp
,
greedy
,
math
1600
x10383
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
1701C
Schedule Management
binary search
,
greedy
,
implementation
,
two pointers
1400
x16393
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
1697C
awoo's Favorite Problem
binary search
,
constructive algorithms
,
data structures
,
greedy
,
implementation
,
strings
,
two pointers
1400
x14162
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
1692H
Gambling
data structures
,
dp
,
greedy
,
math
1700
x7277
1692G
2^Sort
data structures
,
dp
,
sortings
,
two pointers
1400
x16898
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
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
1679C
Rooks Defenders
data structures
,
implementation
1400
x10116
1678B2
Tokitsukaze and Good 01-String (hard version)
dp
,
greedy
,
implementation
1800
x6502
1677B
Tokitsukaze and Meeting
data structures
,
implementation
,
math
1700
x4107
1677A
Tokitsukaze and Strange Inequality
brute force
,
data structures
,
dp
1600
x8305
1676H2
Maximum Crossings (Hard Version)
data structures
,
divide and conquer
,
sortings
1500
x10448
1676H1
Maximum Crossings (Easy Version)
brute force
1400
x13707
1675F
Vlad and Unfinished Business
dfs and similar
,
dp
,
greedy
,
trees
1800
x5181
1675E
Replace With the Previous, Minimize
dsu
,
greedy
,
strings
1500
x10439
1674F
Desktop Rearrangement
data structures
,
greedy
,
implementation
1800
x4968
1673C
Palindrome Basis
brute force
,
dp
,
math
,
number theory
1500
x12341
1672D
Cyclic Rotation
constructive algorithms
,
greedy
,
implementation
,
two pointers
1700
x6151
1671D
Insert a Progression
brute force
,
constructive algorithms
,
greedy
1600
x7521
1670D
Very Suspicious
binary search
,
brute force
,
geometry
,
greedy
,
implementation
,
math
1700
x5042
1670C
Where is the Pizza?
data structures
,
dfs and similar
,
dsu
,
graphs
,
implementation
,
math
1400
x9784
1666L
Labyrinth
dfs and similar
,
graphs
1800
x3033
1666C
Connect the Points
brute force
,
constructive algorithms
,
geometry
1800
x3127
1665C
Tree Infection
binary search
,
greedy
,
sortings
,
trees
1600
x8210
1661C
Water the Trees
binary search
,
greedy
,
math
1700
x9192
1660F1
Promising String (easy version)
brute force
,
implementation
,
math
,
strings
1700
x7141
1660E
Matrix and Shifts
brute force
,
constructive algorithms
,
greedy
,
implementation
1600
x7203
1660D
Maximum Product Strikes Back
brute force
,
implementation
,
math
,
two pointers
1600
x8470
1659C
Line Empire
binary search
,
brute force
,
dp
,
greedy
,
implementation
,
math
1500
x10155
1658D1
388535 (Easy Version)
bitmasks
,
math
1600
x8943
1658C
Shinju and the Lost Permutation
constructive algorithms
,
math
1700
x9206
1654C
Alice and the Cake
data structures
,
greedy
,
implementation
,
sortings
1400
x13348
1651C
Fault-tolerant Network
brute force
,
data structures
,
implementation
1500
x10612
1648B
Integral Array
brute force
,
constructive algorithms
,
data structures
,
math
1800
x6321
1648A
Weird Sum
combinatorics
,
data structures
,
geometry
,
math
,
matrices
,
sortings
1400
x12345
1646C
Factorials and Powers of Two
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
math
1500
x13723
1644D
Cross Coloring
data structures
,
implementation
,
math
1700
x7112
1644C
Increase Subarray Sums
brute force
,
dp
,
greedy
,
implementation
1400
x13591
1637D
Yet Another Minimization Problem
dp
,
greedy
,
math
1800
x7577
1635D
Infinite Set
bitmasks
,
dp
,
math
,
matrices
,
number theory
,
strings
1800
x6147
1634B
Fortune Telling
bitmasks
,
math
1400
x16149
1633D
Make Them Equal
dp
,
greedy
1600
x13584
1632C
Strange Test
binary search
,
bitmasks
,
brute force
,
dp
,
math
1600
x12544
1630B
Range and Partition
binary search
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
1800
x5649
1630A
And Matching
bitmasks
,
constructive algorithms
1500
x14345
1628B
Peculiar Movie Preferences
greedy
,
strings
1700
x11393
1628A
Meximum Array
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
,
two pointers
1400
x15427
1627C
Not Assigning
constructive algorithms
,
dfs and similar
,
number theory
,
trees
1400
x14290
1626C
Monsters And Spells
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
math
,
two pointers
1700
x10786
1625C
Road Optimization
dp
1700
x10399
1624D
Palindromes Coloring
binary search
,
greedy
,
sortings
,
strings
1400
x16645
1623C
Balanced Stone Heaps
binary search
,
greedy
1600
x11662
1622C
Set or Decrease
binary search
,
brute force
,
greedy
,
sortings
1600
x12722
1621C
Hidden Permutations
dfs and similar
,
interactive
,
math
1700
x6824
1621B
Integers Shop
data structures
,
greedy
,
implementation
1500
x13266
1620C
BA-String
brute force
,
dp
,
greedy
,
implementation
,
math
1800
x6476
1619E
MEX and Increments
constructive algorithms
,
data structures
,
dp
,
greedy
,
implementation
,
math
,
sortings
1700
x8997
1619D
New Year's Problem
binary search
,
greedy
,
sortings
1800
x7427
1618E
Singers' Tour
constructive algorithms
,
math
1700
x7076
1617D1
Too Many Impostors (easy version)
constructive algorithms
,
implementation
,
interactive
1800
x4609
1616C
Representative Edges
brute force
,
geometry
,
implementation
,
math
1500
x12120
1615C
Menorah
brute force
,
graphs
,
greedy
,
math
1600
x8271
1614C
Divan and bitwise operations
bitmasks
,
combinatorics
,
constructive algorithms
,
dp
,
math
1500
x10105
1612D
X-Magic Pair
math
,
number theory
1600
x8995
1611F
ATM and Students
binary search
,
data structures
,
two pointers
1800
x6333
1611E1
Escape The Maze (easy version)
dfs and similar
,
greedy
,
shortest paths
,
trees
,
two pointers
1700
x7132
1611D
Weights Assignment For Tree Edges
constructive algorithms
,
trees
1500
x9714
1610C
Keshi Is Throwing a Party
binary search
,
greedy
1600
x11154
1609D
Social Network
dsu
,
graphs
,
greedy
,
implementation
,
trees
1600
x7182
1609C
Complex Market Analysis
binary search
,
dp
,
implementation
,
number theory
,
schedules
,
two pointers
1400
x9628
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