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Pinely Round 4 (Div. 1 + Div. 2)
02:15:26
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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
92112
Labyrinth-12
3200
92111
Labyrinth-11
3200
92110
Labyrinth-10
3200
92109
Labyrinth-9
3200
92108
Labyrinth-8
3200
92107
Labyrinth-7
3200
92106
Labyrinth-6
3200
92105
Labyrinth-5
3200
92104
Labyrinth-4
3200
92103
Labyrinth-3
3200
92102
Labyrinth-2
3200
92101
Labyrinth-1
3200
920G
List Of Integers
binary search
,
bitmasks
,
brute force
,
combinatorics
,
math
,
number theory
2200
x1718
920F
SUM and REPLACE
brute force
,
data structures
,
dsu
,
number theory
2000
x6484
920E
Connected Components?
data structures
,
dfs and similar
,
dsu
,
graphs
2100
x6139
920D
Tanks
dp
,
greedy
,
implementation
2400
x695
919F
A Game With Numbers
games
,
graphs
,
shortest paths
2600
x330
919E
Congruence Equation
chinese remainder theorem
,
math
,
number theory
2100
x2053
917E
Upside Down
data structures
,
string suffix structures
,
strings
,
trees
3400
x125
917D
Stranger Trees
dp
,
math
,
matrices
,
trees
2600
x1109
917C
Pollywog
combinatorics
,
dp
,
matrices
2900
x390
916E
Jamie and Tree
data structures
,
trees
2400
x1620
916D
Jamie and To-do List
data structures
,
interactive
,
trees
2200
x505
916B
Jamie and Binary Sequence (changed after round)
bitmasks
,
greedy
,
math
2000
x1862
915G
Coprime Arrays
math
,
number theory
2300
x1165
915F
Imbalance Value of a Tree
data structures
,
dsu
,
graphs
,
trees
2400
x2401
915E
Physical Education Lessons
data structures
,
implementation
,
sortings
2300
x4201
915D
Almost Acyclic Graph
dfs and similar
,
graphs
2200
x3365
914H
Ember and Storm's Tree Game
combinatorics
,
dp
,
games
,
trees
3400
x236
914G
Sum the Fibonacci
bitmasks
,
divide and conquer
,
dp
,
fft
,
math
2600
x909
914F
Substrings in a String
bitmasks
,
brute force
,
data structures
,
string suffix structures
,
strings
3000
x1574
914E
Palindromes in a Tree
bitmasks
,
data structures
,
divide and conquer
,
trees
2400
x1447
913H
Don't Exceed
math
,
probabilities
3400
x124
913G
Power Substring
math
,
number theory
3200
x198
913F
Strongly Connected Tournament
dp
,
graphs
,
math
,
probabilities
2800
x634
913E
Logical Expression
bitmasks
,
dp
,
shortest paths
2400
x762
912E
Prime Gift
binary search
,
dfs and similar
,
math
,
meet-in-the-middle
,
number theory
,
two pointers
2400
x1527
912D
Fishes
data structures
,
graphs
,
greedy
,
probabilities
,
shortest paths
2100
x1981
912C
Perun, Ult!
brute force
,
greedy
,
sortings
2500
x514
911G
Mass Change Queries
data structures
2500
x2754
911F
Tree Destruction
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2400
x1616
911E
Stack Sorting
constructive algorithms
,
data structures
,
greedy
,
implementation
2000
x2498
909F
AND-permutations
constructive algorithms
2500
x522
909D
Colorful Points
data structures
,
greedy
,
implementation
2100
x1920
908H
New Year and Boolean Bridges
3100
x376
908G
New Year and Original Order
dp
,
math
2800
x1328
908F
New Year and Rainbow Roads
graphs
,
greedy
,
implementation
2400
x1385
908E
New Year and Entity Enumeration
bitmasks
,
combinatorics
,
dp
,
math
2500
x752
908D
New Year and Arbitrary Arrangement
dp
,
math
,
probabilities
2200
x2302
906E
Reverses
dp
,
string suffix structures
,
strings
3300
x437
906D
Power Tower
chinese remainder theorem
,
math
,
number theory
2700
x2041
906C
Party
bitmasks
,
brute force
,
dp
,
graphs
2400
x1281
906B
Seating of Students
brute force
,
constructive algorithms
,
math
2200
x1129
903G
Yet Another Maxflow Problem
data structures
,
flows
,
graphs
2700
x520
903F
Clear The Matrix
bitmasks
,
dp
2200
x630
903E
Swapping Characters
brute force
,
hashing
,
implementation
,
strings
2200
x1451
903D
Almost Difference
data structures
,
math
2200
x3739
901E
Cyclic Cipher
fft
,
math
3300
x85
901D
Weighting a Tree
constructive algorithms
,
dfs and similar
,
graphs
2700
x438
901C
Bipartite Segments
binary search
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
two pointers
2300
x1158
901B
GCD of Polynomials
constructive algorithms
,
math
2200
x1576
900E
Maximum Questions
data structures
,
dp
,
strings
2100
x1219
900D
Unusual Sequences
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
2000
x3123
899F
Letters Removing
data structures
,
strings
2100
x1795
899E
Segments Removal
data structures
,
dsu
,
flows
,
implementation
,
two pointers
2000
x2989
898F
Restoring the Expression
brute force
,
hashing
,
math
2300
x1178
896E
Welcome home, Chtholly
data structures
,
dsu
3100
x2083
896D
Nephren Runs a Cinema
chinese remainder theorem
,
combinatorics
,
math
,
number theory
2900
x523
896C
Willem, Chtholly and Seniorious
data structures
,
probabilities
2600
x3281
896B
Ithea Plays With Chtholly
binary search
,
constructive algorithms
,
games
,
greedy
,
interactive
2000
x2084
895E
Eyes Closed
data structures
,
probabilities
2300
x1094
895D
String Mark
combinatorics
,
math
,
strings
2100
x1100
895C
Square Subsets
bitmasks
,
combinatorics
,
dp
,
math
2000
x5286
894E
Ralph and Mushrooms
dp
,
graphs
2100
x2227
894D
Ralph And His Tour in Binary Country
brute force
,
data structures
,
trees
2200
x1121
893F
Subtree Minimum Query
data structures
,
trees
2300
x1919
893E
Counting Arrays
combinatorics
,
dp
,
math
,
number theory
2000
x3567
891E
Lust
combinatorics
,
math
,
matrices
3000
x898
891D
Sloth
dfs and similar
,
dp
,
graph matchings
,
trees
3100
x180
891C
Envy
data structures
,
dsu
,
graphs
2300
x2320
891B
Gluttony
constructive algorithms
,
greedy
2000
x2944
889E
Mod Mod Mod
binary search
,
dp
,
math
3000
x521
888G
Xor-MST
bitmasks
,
constructive algorithms
,
data structures
2300
x4270
888F
Connecting Vertices
dp
,
graphs
2500
x776
887F
Row of Models
greedy
,
sortings
2500
x163
887E
Little Brother
binary search
,
geometry
,
sortings
2800
x163
887D
Ratings and Reality Shows
data structures
,
two pointers
2400
x474
886F
Symmetric Projections
geometry
2900
x266
886E
Maximum Element
combinatorics
,
dp
,
math
2400
x993
886D
Restoration of string
constructive algorithms
,
graphs
,
implementation
2000
x1756
884F
Anti-Palindromize
flows
,
graphs
,
greedy
2500
x1034
884E
Binary Matrix
dsu
2500
x678
884D
Boxes And Balls
data structures
,
greedy
2300
x1942
883L
Berland.Taxi
data structures
2500
x230
883J
Renovation
constructive algorithms
,
greedy
,
sortings
2400
x575
883D
Packmen Strike Back
binary search
,
dp
,
math
2500
x366
883C
Downloading B++
binary search
,
implementation
2300
x620
883B
Berland Army
constructive algorithms
,
graphs
,
greedy
2600
x342
883A
Automatic Door
implementation
2200
x585
878E
Numbers on the blackboard
combinatorics
,
dp
3300
x499
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