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Codeforces Round 1134 (Div. 4)
4 days
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combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
communication
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
891D
Sloth
dfs and similar
,
dp
,
graph matchings
,
trees
3100
x490
891C
Envy
data structures
,
dsu
,
graphs
2300
x3330
891B
Gluttony
constructive algorithms
,
greedy
2000
x3305
889E
Mod Mod Mod
binary search
,
dp
,
math
3000
x836
888G
Xor-MST
bitmasks
,
constructive algorithms
,
data structures
2300
x6429
888F
Connecting Vertices
dp
,
graphs
2500
x1234
888E
Maximum Subsequence
bitmasks
,
divide and conquer
,
meet-in-the-middle
1800
x10223
888D
Almost Identity Permutations
combinatorics
,
dp
,
math
1600
x11235
887F
Row of Models
greedy
,
sortings
2500
x223
887E
Little Brother
binary search
,
geometry
,
sortings
2800
x225
887D
Ratings and Reality Shows
data structures
,
two pointers
2400
x583
886F
Symmetric Projections
geometry
2900
x315
886E
Maximum Element
combinatorics
,
dp
,
math
2400
x1289
886D
Restoration of string
constructive algorithms
,
graphs
,
implementation
2000
x2082
884F
Anti-Palindromize
flows
,
graphs
,
greedy
2500
x1360
884E
Binary Matrix
dsu
2500
x842
884D
Boxes And Balls
data structures
,
greedy
2300
x2298
883L
Berland.Taxi
data structures
2500
x317
883K
Road Widening
constructive algorithms
,
greedy
,
implementation
1800
x1259
883J
Renovation
constructive algorithms
,
greedy
,
sortings
2400
x665
883I
Photo Processing
binary search
,
dp
1900
x2460
883H
Palindromic Cut
brute force
,
implementation
,
strings
1800
x1814
883G
Orientation of Edges
dfs and similar
,
graphs
1900
x1566
883D
Packmen Strike Back
binary search
,
dp
,
math
2500
x513
883C
Downloading B++
binary search
,
implementation
2300
x899
883B
Berland Army
constructive algorithms
,
graphs
,
greedy
2600
x488
883A
Automatic Door
implementation
2200
x711
878E
Numbers on the blackboard
combinatorics
,
dp
3300
x782
878D
Magic Breeding
bitmasks
2900
x1008
878C
Tournament
data structures
,
graphs
2700
x1086
878B
Teams Formation
data structures
,
implementation
2300
x1143
878A
Short Program
bitmasks
,
constructive algorithms
1600
x6122
877F
Ann and Books
data structures
,
flows
,
hashing
2300
x2596
877E
Danil and a Part-time Job
bitmasks
,
data structures
,
trees
2000
x6146
877D
Olya and Energy Drinks
data structures
,
dfs and similar
,
graphs
,
shortest paths
2100
x5425
877C
Slava and tanks
constructive algorithms
1600
x6118
875F
Royal Questions
dsu
,
graphs
,
greedy
2500
x1715
875E
Delivery Club
binary search
,
data structures
,
dp
2600
x1061
875D
High Cry
binary search
,
bitmasks
,
combinatorics
,
data structures
,
divide and conquer
2200
x2625
875C
National Property
2-sat
,
dfs and similar
,
graphs
,
implementation
2100
x2446
873F
Forbidden Indices
dsu
,
string suffix structures
,
strings
2400
x2030
873E
Awards For Contestants
brute force
,
data structures
,
dp
2300
x834
873D
Merge Sort
constructive algorithms
,
divide and conquer
1800
x4241
873C
Strange Game On Matrix
greedy
,
two pointers
1600
x3701
871E
Restore the Tree
graphs
,
greedy
,
trees
2900
x246
870F
Paths
data structures
,
number theory
2700
x751
870E
Points, Lines and Ready-made Titles
dfs and similar
,
dsu
,
graphs
,
trees
2300
x1352
870D
Something with XOR Queries
brute force
,
interactive
,
probabilities
2000
x1334
869E
The Untended Antiquity
data structures
,
hashing
2400
x2471
869D
The Overdosing Ubiquity
brute force
,
dfs and similar
,
graphs
2800
x376
869C
The Intriguing Obsession
combinatorics
,
dp
,
math
1800
x5396
868G
El Toll Caves
math
3300
x200
868F
Yet Another Minimization Problem
divide and conquer
,
dp
2500
x5817
868E
Policeman and a Tree
dp
,
graphs
,
trees
2700
x575
868D
Huge Strings
bitmasks
,
brute force
,
dp
,
implementation
,
strings
2200
x1038
865G
Flowers and Chocolate
combinatorics
,
math
,
matrices
3300
x340
865F
Egg Roulette
bitmasks
,
brute force
,
divide and conquer
,
math
,
meet-in-the-middle
3300
x81
865E
Hex Dyslexia
bitmasks
,
brute force
,
dp
,
graphs
3300
x167
865D
Buy Low Sell High
constructive algorithms
,
data structures
,
greedy
2400
x9229
865C
Gotta Go Fast
binary search
,
dp
2400
x974
865B
Ordering Pizza
binary search
,
sortings
,
ternary search
1900
x1969
864F
Cities Excursions
dfs and similar
,
graphs
,
trees
2700
x726
864E
Fire
dp
,
sortings
2000
x4933
863G
Graphic Settings
3200
x68
863F
Almost Permutation
flows
2200
x1654
863E
Turn Off The TV
data structures
,
sortings
2000
x4486
863D
Yet Another Array Queries Problem
data structures
,
implementation
1800
x3952
863C
1-2-3
graphs
,
implementation
1800
x2749
862F
Mahmoud and Ehab and the final stage
data structures
,
strings
2900
x300
862E
Mahmoud and Ehab and the function
binary search
,
data structures
,
sortings
2100
x2394
862D
Mahmoud and Ehab and the binary string
binary search
,
divide and conquer
,
interactive
2000
x2104
862C
Mahmoud and Ehab and the xor
constructive algorithms
1900
x4595
860E
Arkady and a Nobody-men
data structures
,
dfs and similar
,
trees
2700
x564
859G
Circle of Numbers
math
3000
x328
859F
Ordering T-Shirts
greedy
2800
x285
859E
Desk Disorder
combinatorics
,
dfs and similar
,
dsu
,
graphs
,
trees
2100
x2193
859D
Third Month Insanity
dp
,
probabilities
,
trees
2100
x1167
858F
Wizard's Tour
constructive algorithms
,
dfs and similar
,
graphs
2300
x2244
858E
Tests Renumeration
greedy
,
implementation
2200
x558
858D
Polycarp's phone book
data structures
,
implementation
,
sortings
1600
x4451
856F
To Play or not to Play
greedy
3000
x134
856E
Satellites
3100
x181
856D
Masha and Cactus
dp
,
trees
2400
x636
856C
Eleventh Birthday
combinatorics
,
dp
,
math
2400
x768
856B
Similar Words
dp
,
hashing
,
strings
,
trees
2300
x679
856A
Set Theory
brute force
,
constructive algorithms
1600
x1666
855G
Harry Vs Voldemort
dfs and similar
,
dp
,
graphs
,
trees
3300
x483
855F
Nagini
binary search
,
data structures
3100
x722
855E
Salazar Slytherin's Locket
bitmasks
,
dp
2200
x2335
855D
Rowena Ravenclaw's Diadem
trees
2500
x648
855C
Helga Hufflepuff's Cup
dp
,
trees
2000
x2533
853E
Lada Malina
data structures
,
geometry
3400
x92
853D
Michael and Charging Stations
binary search
,
dp
,
greedy
2400
x733
853C
Boredom
data structures
2100
x1879
853B
Jury Meeting
greedy
,
sortings
,
two pointers
1800
x2791
852I
Dating
brute force
,
dfs and similar
,
graphs
,
trees
2300
x833
852H
Bob and stages
dp
,
geometry
3000
x224
852G
Bathroom terminal
implementation
1700
x1482
852F
Product transformation
combinatorics
,
math
,
number theory
2200
x676
852E
Casinos and travel
dp
2100
x1270
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