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Pinely Round 4 (Div. 1 + Div. 2)
18:12:43
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Difficulty:
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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
1801G
A task for substrings
data structures
,
string suffix structures
,
strings
3400
x357
1801F
Another n-dimensional chocolate bar
dp
,
math
,
meet-in-the-middle
,
number theory
2700
x559
1801E
Gasoline prices
data structures
,
divide and conquer
,
dsu
,
hashing
,
trees
3000
x440
1799H
Tree Cutting
bitmasks
,
dfs and similar
,
dp
3200
x275
1799G
Count Voting
combinatorics
,
dp
,
math
2600
x730
1799F
Halve or Subtract
binary search
,
brute force
,
dp
,
greedy
,
sortings
2700
x786
1798F
Gifts from Grandfather Ahmed
dp
,
math
,
number theory
2500
x481
1797F
Li Hua and Path
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
trees
3000
x342
1796F
Strange Triples
brute force
,
math
,
number theory
2900
x170
1796E
Colored Subgraphs
dfs and similar
,
dp
,
games
,
greedy
,
trees
2500
x733
1795G
Removal Sequences
bitmasks
,
dfs and similar
,
graphs
2700
x665
1795F
Blocking Chips
binary search
,
constructive algorithms
,
dfs and similar
,
greedy
,
trees
2400
x1087
1794E
Labeling the Tree with Distances
data structures
,
dp
,
greedy
,
hashing
,
implementation
,
trees
2400
x1050
1793F
Rebrending
brute force
,
data structures
,
divide and conquer
,
implementation
2600
x1341
1793E
Velepin and Marketing
binary search
,
data structures
,
dp
,
greedy
,
sortings
,
two pointers
2600
x960
1792F2
Graph Coloring (hard version)
brute force
,
combinatorics
,
divide and conquer
,
dp
,
fft
,
graphs
2900
x379
1792F1
Graph Coloring (easy version)
combinatorics
,
dp
,
graphs
2700
x694
1792E
Divisors and Table
brute force
,
dfs and similar
,
dp
,
number theory
2400
x1352
1789F
Serval and Brain Power
bitmasks
,
brute force
,
dp
,
greedy
,
implementation
,
strings
2700
x649
1789E
Serval and Music Game
brute force
,
dp
,
implementation
,
math
,
number theory
2500
x796
1788F
XOR, Tree, and Queries
bitmasks
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
trees
2500
x817
1787I
Treasure Hunt
data structures
,
divide and conquer
,
two pointers
3400
x151
1787H
Codeforces Scoreboard
binary search
,
data structures
,
dp
,
geometry
3300
x209
1787G
Colorful Tree Again
brute force
,
data structures
,
trees
3000
x424
1787F
Inverse Transformation
constructive algorithms
,
implementation
,
math
2500
x665
1784F
Minimums or Medians
3400
x174
1784E
Infinite Game
brute force
,
combinatorics
,
dp
,
games
,
probabilities
3100
x313
1784D
Wooden Spoon
combinatorics
,
dp
2400
x979
1783G
Weighed Tree Radius
data structures
,
divide and conquer
,
implementation
,
trees
2800
x443
1783F
Double Sort II
dfs and similar
,
flows
,
graph matchings
,
graphs
2500
x993
1781H2
Window Signals (hard version)
3500
x89
1781H1
Window Signals (easy version)
3200
x115
1781G
Diverse Coloring
constructive algorithms
,
trees
3200
x219
1781F
Bracket Insertion
combinatorics
,
dp
,
math
,
trees
2700
x811
1780G
Delicious Dessert
binary search
,
dsu
,
hashing
,
math
,
number theory
,
string suffix structures
2400
x683
1780E
Josuke and Complete Graph
binary search
,
brute force
,
data structures
,
math
,
number theory
2400
x1348
1779H
Olympic Team Building
brute force
,
meet-in-the-middle
3500
x137
1779G
The Game of the Century
constructive algorithms
,
graphs
,
shortest paths
3000
x309
1779F
Xorcerer's Stones
bitmasks
,
constructive algorithms
,
dp
,
trees
2500
x1239
1779E
Anya's Simultaneous Exhibition
constructive algorithms
,
graphs
,
greedy
,
interactive
,
sortings
2400
x1726
1778F
Maximizing Root
dfs and similar
,
dp
,
graphs
,
math
,
number theory
,
trees
2600
x633
1778E
The Tree Has Fallen!
bitmasks
,
dfs and similar
,
math
,
trees
2500
x845
1777F
Comfortably Numb
bitmasks
,
data structures
,
divide and conquer
,
strings
,
trees
2400
x868
1776N
Count Permutations
math
3500
x79
1776M
Parmigiana With Seafood
binary search
,
dp
,
greedy
,
trees
3000
x364
1776K
Uniform Chemistry
dp
,
math
3200
x65
1776J
Italian Data Centers
graphs
,
shortest paths
2500
x622
1776I
Spinach Pizza
games
,
geometry
,
greedy
,
interactive
2500
x652
1776E
Crossing the Railways
data structures
,
dp
3500
x67
1776D
Teamwork
constructive algorithms
,
greedy
,
math
2800
x350
1776C
Library game
games
,
greedy
,
interactive
,
sortings
2500
x772
1775F
Laboratory on Pluto
constructive algorithms
,
dp
,
greedy
,
math
2500
x755
1774H
Maximum Permutation
constructive algorithms
3500
x132
1774G
Segment Covering
brute force
,
combinatorics
,
constructive algorithms
,
data structures
,
dp
,
trees
3200
x431
1774F2
Magician and Pigs (Hard Version)
binary search
,
brute force
,
data structures
,
implementation
2700
x661
1774F1
Magician and Pigs (Easy Version)
brute force
,
data structures
,
implementation
2400
x1049
1773L
Lisa's Sequences
dp
3500
x31
1773J
Jumbled Trees
constructive algorithms
,
math
2900
x104
1773I
Interactive Factorial Guessing
brute force
,
games
,
implementation
,
interactive
2500
x465
1773H
Hot and Cold
binary search
,
interactive
2600
x352
1773G
Game of Questions
bitmasks
,
combinatorics
,
dp
,
fft
,
math
,
probabilities
2800
x350
1773D
Dominoes
combinatorics
,
flows
,
graph matchings
,
greedy
2600
x451
1773C
Cactus Meets Torus
3500
x30
1771F
Hossam and Range Minimum Query
binary search
,
bitmasks
,
data structures
,
hashing
,
probabilities
,
strings
,
trees
2500
x1044
1771E
Hossam and a Letter
brute force
,
dp
,
implementation
,
two pointers
2500
x677
1770H
Koxia, Mahiru and Winter Festival
constructive algorithms
3500
x101
1770G
Koxia and Bracket
divide and conquer
,
fft
,
math
3400
x158
1770F
Koxia and Sequence
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
3100
x640
1770E
Koxia and Tree
combinatorics
,
dfs and similar
,
dp
,
dsu
,
math
,
probabilities
,
trees
2400
x1325
1768F
Wonderful Jump
dp
,
greedy
2900
x805
1767F
Two Subtrees
data structures
,
trees
3100
x264
1767E
Algebra Flash
bitmasks
,
brute force
,
dp
,
graphs
,
math
,
meet-in-the-middle
,
trees
2500
x881
1766F
MCF
flows
2800
x267
1765L
Project Manager
brute force
,
data structures
,
implementation
2400
x576
1765J
Hero to Zero
graph matchings
,
math
2900
x189
1765I
Infinite Chess
implementation
,
shortest paths
2800
x187
1765G
Guess the String
constructive algorithms
,
interactive
,
probabilities
2600
x380
1765C
Card Guessing
combinatorics
,
dp
,
probabilities
2600
x376
1765A
Access Levels
bitmasks
,
dsu
,
flows
,
graph matchings
2400
x685
1764H
Doremy's Paint 2
data structures
3400
x176
1764G3
Doremy's Perfect DS Class (Hard Version)
binary search
,
interactive
3300
x444
1764G2
Doremy's Perfect DS Class (Medium Version)
binary search
,
interactive
3000
x510
1764G1
Doremy's Perfect DS Class (Easy Version)
binary search
,
interactive
2900
x564
1764F
Doremy's Experimental Tree
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
sortings
,
trees
2500
x943
1764E
Doremy's Number Line
dp
,
greedy
,
sortings
2400
x1206
1763F
Edge Queries
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
,
trees
3000
x442
1762G
Unequal Adjacent Elements
constructive algorithms
,
sortings
3100
x101
1762F
Good Pairs
binary search
,
data structures
,
dp
2600
x581
1762E
Tree Sum
combinatorics
,
math
,
trees
2600
x629
1761G
Centroid Guess
interactive
,
probabilities
,
trees
3500
x104
1761F2
Anti-median (Hard Version)
combinatorics
,
dp
,
math
3500
x79
1761F1
Anti-median (Easy Version)
dp
,
math
3100
x205
1761E
Make It Connected
binary search
,
brute force
,
constructive algorithms
,
dsu
,
graphs
,
greedy
,
matrices
,
trees
,
two pointers
2400
x1773
1758F
Decent Division
constructive algorithms
,
data structures
3000
x162
1758E
Tick, Tock
combinatorics
,
dfs and similar
,
dsu
,
graphs
2500
x823
1753F
Minecraft Series
brute force
,
two pointers
3500
x196
1753E
N Machines
binary search
,
brute force
,
greedy
3300
x320
1753D
The Beach
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
2400
x1709
1750H
BinaryStringForces
constructive algorithms
,
data structures
,
dp
3500
x78
1750G
Doping
combinatorics
,
dp
,
math
3300
x232
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