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Pinely Round 4 (Div. 1 + Div. 2)
15:55:01
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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
1824E
LuoTianyi and Cartridge
data structures
,
trees
3500
x127
1824D
LuoTianyi and the Function
data structures
3000
x474
1824C
LuoTianyi and XOR-Tree
data structures
,
dfs and similar
,
dp
,
dsu
,
greedy
,
trees
2500
x1345
1824B2
LuoTianyi and the Floating Islands (Hard Version)
combinatorics
,
dfs and similar
,
math
,
probabilities
,
trees
2300
x2548
1823F
Random Walk
dp
,
graphs
,
math
,
probabilities
,
trees
2600
x838
1823E
Removing Graph
brute force
,
dp
,
games
,
graphs
,
math
2500
x1210
1822G2
Magic Triples (Hard Version)
brute force
,
data structures
,
math
,
number theory
2200
x2369
1821F
Timber
combinatorics
,
dp
,
fft
,
math
2600
x728
1821E
Rearrange Brackets
brute force
,
dp
,
greedy
,
sortings
,
strings
2100
x2327
1819F
Willy-nilly, Crack, Into Release!
data structures
,
dp
3500
x129
1819E
Roads in E City
interactive
,
math
,
probabilities
,
trees
3200
x276
1819D
Misha and Apples
brute force
,
data structures
,
dp
,
two pointers
2800
x614
1819C
The Fox and the Complete Tree Traversal
constructive algorithms
,
dp
,
implementation
,
math
,
trees
2400
x1434
1817F
Entangled Substrings
string suffix structures
,
strings
3500
x188
1817E
Half-sum
brute force
,
divide and conquer
,
greedy
3400
x257
1817D
Toy Machine
constructive algorithms
,
games
,
implementation
2700
x724
1817C
Similar Polynomials
combinatorics
,
math
2400
x951
1815F
OH NO1 (-2-3-4)
constructive algorithms
,
graphs
,
math
3500
x218
1815E
Bosco and Particle
dp
,
math
,
number theory
,
strings
3100
x335
1815D
XOR Counting
bitmasks
,
combinatorics
,
dp
,
math
2600
x1089
1815C
Between
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
2200
x1927
1815B
Sum Graph
brute force
,
constructive algorithms
,
graphs
,
implementation
,
interactive
,
shortest paths
,
trees
2000
x2966
1814F
Communication Towers
brute force
,
divide and conquer
,
dsu
2700
x578
1814E
Chain Chips
data structures
,
dp
,
matrices
2300
x1297
1814D
Balancing Weapons
binary search
,
brute force
,
data structures
,
math
,
two pointers
2500
x849
1811G2
Vlad and the Nice Paths (hard version)
binary search
,
combinatorics
,
data structures
,
dp
,
math
,
two pointers
2200
x1695
1811G1
Vlad and the Nice Paths (easy version)
combinatorics
,
dp
,
math
2100
x2004
1811F
Is It Flower?
dfs and similar
,
graphs
,
implementation
2100
x1784
1810H
Last Number
combinatorics
,
math
2900
x133
1810G
The Maximum Prefix
dp
3200
x667
1810F
M-tree
data structures
,
math
,
sortings
,
trees
2800
x560
1810E
Monsters
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
2100
x3095
1809G
Prediction
combinatorics
,
dp
,
math
2800
x433
1809F
Traveling in Berland
binary search
,
data structures
,
graphs
,
greedy
,
implementation
2500
x739
1809E
Two Tanks
binary search
,
dp
,
implementation
,
math
2400
x813
1808E3
Minibuses on Venus (hard version)
brute force
,
combinatorics
,
dp
,
math
2800
x431
1808E2
Minibuses on Venus (medium version)
combinatorics
,
divide and conquer
,
dp
,
matrices
2500
x672
1808E1
Minibuses on Venus (easy version)
combinatorics
,
divide and conquer
,
dp
2200
x1299
1808D
Petya, Petya, Petr, and Palindromes
binary search
,
brute force
,
data structures
,
two pointers
2100
x2260
1806F2
GCD Master (hard version)
greedy
,
math
,
sortings
2900
x286
1806F1
GCD Master (easy version)
greedy
,
math
,
number theory
,
sortings
2900
x345
1806E
Tree Master
brute force
,
data structures
,
dfs and similar
,
trees
2200
x2751
1806D
DSU Master
combinatorics
,
dp
,
dsu
,
math
2500
x871
1805F2
Survival of the Weakest (hard version)
greedy
,
math
,
sortings
,
two pointers
3100
x337
1805F1
Survival of the Weakest (easy version)
binary search
,
brute force
,
implementation
,
math
,
sortings
2600
x863
1805E
There Should Be a Lot of Maximums
brute force
,
data structures
,
dfs and similar
,
dp
,
trees
,
two pointers
2300
x1567
1804H
Code Lock
bitmasks
,
dp
3300
x174
1804G
Flow Control
data structures
,
dsu
,
implementation
3500
x198
1804F
Approximate Diameter
binary search
,
divide and conquer
,
graphs
,
shortest paths
2700
x891
1804E
Routing
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
2400
x1403
1804D
Accommodation
brute force
,
dp
,
greedy
,
implementation
2000
x4536
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
1801D
The way home
binary search
,
data structures
,
dp
,
graphs
,
greedy
,
shortest paths
,
sortings
2100
x2130
1800G
Symmetree
dfs and similar
,
hashing
,
implementation
,
trees
2200
x1983
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
1799E
City Union
constructive algorithms
,
dfs and similar
,
dsu
,
geometry
,
greedy
,
implementation
,
math
2300
x1175
1799D2
Hot Start Up (hard version)
data structures
,
dp
2100
x2387
1798F
Gifts from Grandfather Ahmed
dp
,
math
,
number theory
2500
x481
1798E
Multitest Generator
brute force
,
dp
2300
x1555
1797F
Li Hua and Path
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
trees
3000
x342
1797E
Li Hua and Array
brute force
,
data structures
,
dsu
,
math
,
number theory
,
two pointers
2300
x1236
1796F
Strange Triples
brute force
,
math
,
number theory
2900
x170
1796E
Colored Subgraphs
dfs and similar
,
dp
,
games
,
greedy
,
trees
2500
x733
1796D
Maximum Subarray
data structures
,
dp
,
greedy
,
two pointers
2000
x4156
1795G
Removal Sequences
bitmasks
,
dfs and similar
,
graphs
2700
x665
1795F
Blocking Chips
binary search
,
constructive algorithms
,
dfs and similar
,
greedy
,
trees
2400
x1087
1795E
Explosions?
binary search
,
data structures
,
dp
,
greedy
,
math
2200
x1974
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
1790G
Tokens on Graph
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
2300
x1094
1790F
Timofey and Black-White Tree
brute force
,
dfs and similar
,
divide and conquer
,
graphs
,
greedy
,
math
,
shortest paths
,
trees
2100
x3247
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
1789D
Serval and Shift-Shift-Shift
bitmasks
,
brute force
,
constructive algorithms
,
implementation
2200
x1634
1788F
XOR, Tree, and Queries
bitmasks
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
trees
2500
x817
1788E
Sum Over Zero
data structures
,
dfs and similar
,
dp
2200
x2585
1788D
Moving Dots
binary search
,
brute force
,
combinatorics
,
math
,
two pointers
2000
x3825
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
1787E
The Harmonization of XOR
bitmasks
,
constructive algorithms
,
greedy
,
math
2100
x2269
1784F
Minimums or Medians
3400
x174
1784E
Infinite Game
brute force
,
combinatorics
,
dp
,
games
,
probabilities
3100
x313
1784D
Wooden Spoon
combinatorics
,
dp
2400
x979
1784C
Monsters (hard version)
data structures
,
greedy
2200
x1612
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
1783E
Game of the Year
brute force
,
data structures
,
math
,
number theory
2300
x2064
1783D
Different Arrays
brute force
,
dp
,
implementation
2000
x4308
1781H2
Window Signals (hard version)
3500
x89
1781H1
Window Signals (easy version)
3200
x115
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