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Pinely Round 4 (Div. 1 + Div. 2)
35:34:45
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Difficulty:
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trees
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
1940C
Burenka and Pether
*special problem
,
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
graphs
,
sortings
,
trees
x35
1211H
Road Repair in Treeland
*special problem
,
binary search
,
dp
,
trees
3100
x45
690F3
Tree of Life (hard)
trees
3200
x47
1211G
King's Path
*special problem
,
math
,
trees
2500
x70
1889F
Doremy's Average Tree
data structures
,
dp
,
greedy
,
trees
3500
x73
1863I
Redundant Routes
constructive algorithms
,
dp
,
trees
3500
x74
1863H
Goldberg Machine 3
dp
,
trees
3500
x74
923F
Public Service
constructive algorithms
,
graphs
,
trees
3200
x74
1326G
Spiderweb Trees
dp
,
geometry
,
trees
3500
x75
1870H
Standard Graph Problem
data structures
,
graphs
,
greedy
,
trees
3500
x81
690F2
Tree of Life (medium)
constructive algorithms
,
hashing
,
trees
2700
x81
1987G2
Spinning Round (Hard Version)
divide and conquer
,
dp
,
trees
3500
x83
1942H
Farmer John's Favorite Intern
data structures
,
dp
,
flows
,
trees
3500
x83
1322F
Assigning Fares
dp
,
trees
3500
x94
1761G
Centroid Guess
interactive
,
probabilities
,
trees
3500
x104
457F
An easy problem about trees
dp
,
games
,
greedy
,
trees
3200
x105
1889E
Doremy's Swapping Trees
dfs and similar
,
graphs
,
trees
3500
x106
1023G
Pisces
data structures
,
flows
,
trees
3400
x114
98B
Help King
implementation
,
probabilities
,
trees
2200
x118
1876G
Clubstep
binary search
,
brute force
,
data structures
,
greedy
,
trees
3500
x119
917E
Upside Down
data structures
,
string suffix structures
,
strings
,
trees
3400
x125
772E
Verifying Kingdom
binary search
,
divide and conquer
,
interactive
,
trees
3200
x125
1824E
LuoTianyi and Cartridge
data structures
,
trees
3500
x127
1444E
Finding the Vertex
brute force
,
dfs and similar
,
dp
,
interactive
,
trees
3500
x135
1919H
Tree Diameter
interactive
,
trees
2000
x137
1423C
Dušan's Railway
divide and conquer
,
graphs
,
trees
3500
x138
786D
Rap God
data structures
,
dfs and similar
,
hashing
,
strings
,
trees
3400
x140
1916G
Optimizations From Chelsu
divide and conquer
,
dp
,
number theory
,
trees
3500
x143
1930H
Interactive Mex Tree
constructive algorithms
,
dfs and similar
,
interactive
,
trees
3300
x147
1534H
Lost Nodes
constructive algorithms
,
dp
,
graphs
,
interactive
,
sortings
,
trees
3500
x147
1208H
Red Blue Tree
data structures
,
implementation
,
trees
3500
x147
871E
Restore the Tree
graphs
,
greedy
,
trees
2900
x148
1158E
Strange device
binary search
,
interactive
,
math
,
trees
3400
x150
1608G
Alphabetic Tree
binary search
,
data structures
,
dfs and similar
,
hashing
,
string suffix structures
,
strings
,
trees
3500
x152
500G
New Year Running
number theory
,
trees
3200
x157
1045J
Moonwalk challenge
data structures
,
strings
,
trees
2600
x169
251E
Tree and Table
dfs and similar
,
dp
,
implementation
,
trees
3000
x169
1983G
Your Loss
bitmasks
,
brute force
,
dp
,
trees
3000
x171
1910F
Build Railway Stations
*special problem
,
greedy
,
trees
2000
x172
1621H
Trains and Airplanes
dfs and similar
,
graphs
,
shortest paths
,
trees
3500
x175
1585G
Poachers
dp
,
games
,
graphs
,
trees
2500
x175
331D3
Escaping on Beaveractor
data structures
,
implementation
,
trees
3000
x175
1919G
Tree LGM
constructive algorithms
,
divide and conquer
,
games
,
trees
3500
x176
482E
ELCA
data structures
,
trees
3200
x176
962G
Visible Black Areas
data structures
,
dsu
,
geometry
,
trees
2800
x177
891D
Sloth
dfs and similar
,
dp
,
graph matchings
,
trees
3100
x180
936E
Iqea
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
shortest paths
,
trees
3400
x186
1659F
Tree and Permutation Game
dfs and similar
,
games
,
graphs
,
trees
3000
x189
1725I
Imitating the Key Tree
combinatorics
,
dsu
,
trees
2800
x193
980F
Cactus to Tree
dp
,
graphs
,
trees
2900
x194
1053E
Euler tour
constructive algorithms
,
trees
3500
x198
42E
Baldman and the military
dfs and similar
,
graphs
,
trees
2700
x198
1987G1
Spinning Round (Easy Version)
divide and conquer
,
dp
,
trees
2900
x200
1402C
Star Trek
*special problem
,
combinatorics
,
dfs and similar
,
dp
,
games
,
graphs
,
matrices
,
trees
2600
x201
1336F
Journey
data structures
,
divide and conquer
,
graphs
,
trees
3500
x203
403E
Two Rooted Trees
data structures
,
implementation
,
trees
2900
x203
1297E
Modernization of Treeland
*special problem
,
dfs and similar
,
trees
x205
855G
Harry Vs Voldemort
dfs and similar
,
dp
,
graphs
,
trees
3300
x205
1740H
MEX Tree Manipulation
data structures
,
trees
3300
x209
1010F
Tree
fft
,
graphs
,
trees
3400
x212
1939B
Evidence Board
*special problem
,
constructive algorithms
,
dfs and similar
,
graphs
,
trees
x214
1981F
Turtle and Paths on a Tree
data structures
,
dp
,
trees
3000
x217
1781G
Diverse Coloring
constructive algorithms
,
trees
3200
x219
1439E
Cheat and Win
bitmasks
,
data structures
,
games
,
trees
3500
x219
1951H
Thanos Snap
binary search
,
dp
,
games
,
greedy
,
trees
3200
x234
914H
Ember and Storm's Tree Game
combinatorics
,
dp
,
games
,
trees
3400
x235
627F
Island Puzzle
dfs and similar
,
dsu
,
graphs
,
trees
3400
x236
793E
Problem of offices
constructive algorithms
,
dfs and similar
,
dp
,
trees
2900
x245
48G
Galaxy Union
dp
,
trees
,
two pointers
2700
x257
1868D
Flower-like Pseudotree
constructive algorithms
,
graphs
,
greedy
,
implementation
,
trees
3000
x258
434E
Furukawa Nagisa's Tree
binary search
,
divide and conquer
,
sortings
,
trees
3000
x258
960H
Santa's Gift
data structures
,
trees
3100
x260
1876E
Ball-Stackable
constructive algorithms
,
data structures
,
dp
,
trees
3300
x261
1254E
Send Tree to Charlie
combinatorics
,
dfs and similar
,
dsu
,
trees
3300
x263
1767F
Two Subtrees
data structures
,
trees
3100
x264
1007D
Ants
2-sat
,
data structures
,
trees
3200
x264
1458F
Range Diameter Sum
data structures
,
trees
3500
x268
830E
Perpetual Motion Machine
constructive algorithms
,
dp
,
graphs
,
implementation
,
math
,
trees
3100
x274
1970G3
Min-Fund Prison (Hard)
bitmasks
,
dfs and similar
,
dp
,
graphs
,
trees
2400
x275
1819E
Roads in E City
interactive
,
math
,
probabilities
,
trees
3200
x276
1610I
Mashtali vs AtCoder
games
,
trees
3100
x278
704E
Iron Man
data structures
,
geometry
,
trees
3300
x279
1109F
Sasha and Algorithm of Silence's Sounds
data structures
,
trees
3200
x289
822F
Madness
constructive algorithms
,
dfs and similar
,
trees
2500
x290
1495F
Squares
constructive algorithms
,
data structures
,
dp
,
graphs
,
trees
3300
x292
802L
Send the Fool Further! (hard)
dfs and similar
,
dp
,
math
,
trees
2400
x295
1718D
Permutation for Burenka
data structures
,
graph matchings
,
greedy
,
math
,
trees
3300
x298
1464F
My Beautiful Madness
data structures
,
trees
3500
x298
1450G
Communism
bitmasks
,
dp
,
trees
3500
x303
1712F
Triameter
binary search
,
data structures
,
dfs and similar
,
trees
3200
x309
1427F
Boring Card Game
data structures
,
greedy
,
trees
3200
x311
1361D
Johnny and James
greedy
,
implementation
,
math
,
trees
2900
x312
1633F
Perfect Matching
data structures
,
divide and conquer
,
interactive
,
trees
2800
x314
1284F
New Year and Social Network
data structures
,
graph matchings
,
graphs
,
math
,
trees
3200
x315
217E
Alien DNA
data structures
,
dsu
,
trees
2800
x317
1583H
Omkar and Tours
data structures
,
divide and conquer
,
sortings
,
trees
3300
x319
117E
Tree or not Tree
data structures
,
divide and conquer
,
implementation
,
trees
2900
x319
847L
Berland SU Computer Network
constructive algorithms
,
dfs and similar
,
graphs
,
hashing
,
trees
2400
x320
1930G
Prefix Max Set Counting
data structures
,
dp
,
trees
3100
x323
1575E
Eye-Pleasing City Park Tour
data structures
,
trees
2600
x323
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