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Before contest
Codeforces Round 1134 (Div. 4)
41:15:20
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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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Problems
#
Name
569A
Music
implementation
,
math
1500
x5102
568E
Longest Increasing Subsequence
data structures
,
dp
3000
x692
568D
Sign Posts
brute force
,
geometry
,
math
2800
x357
568C
New Language
2-sat
,
greedy
2600
x987
568B
Symmetric and Transitive
combinatorics
,
dp
,
math
1900
x2422
568A
Primes or Palindromes?
brute force
,
implementation
,
math
,
number theory
1600
x5441
567F
Mausoleum
dp
2400
x673
567E
President and Roads
dfs and similar
,
graphs
,
hashing
,
shortest paths
2200
x2514
567D
One-Dimensional Battle Ships
binary search
,
data structures
,
greedy
,
sortings
1700
x5431
567C
Geometric Progression
binary search
,
data structures
,
dp
1700
x10714
567B
Berland National Library
implementation
1300
x8931
567A
Lineland Mail
greedy
,
implementation
900
x36890
566G
Max and Min
geometry
2500
x441
566F
Clique in the Divisibility Graph
dp
,
math
,
number theory
1500
x4445
566E
Restoring Map
bitmasks
,
constructive algorithms
,
trees
3200
x736
566D
Restructuring Company
data structures
,
dsu
1900
x4283
566C
Logistical Questions
dfs and similar
,
divide and conquer
,
trees
3000
x996
566B
Replicating Processes
constructive algorithms
,
greedy
2600
x416
566A
Matching Names
dfs and similar
,
strings
,
trees
2300
x1115
560B
Gerald is into Art
constructive algorithms
,
implementation
1200
x8344
560A
Currency System in Geraldion
implementation
,
sortings
1000
x20271
559E
Gerald and Path
dp
,
sortings
3000
x1397
559D
Randomizer
combinatorics
,
geometry
,
probabilities
2800
x511
559C
Gerald and Giant Chess
combinatorics
,
dp
,
math
,
number theory
2200
x8800
559B
Equivalent Strings
divide and conquer
,
hashing
,
sortings
,
strings
1700
x11998
559A
Gerald's Hexagon
brute force
,
geometry
,
math
1600
x11171
558E
A Simple Task
data structures
,
sortings
,
strings
2300
x8076
558D
Guess Your Way Out! II
data structures
,
implementation
,
sortings
2300
x1244
558C
Amr and Chemistry
brute force
,
graphs
,
greedy
,
math
,
shortest paths
1900
x4259
558B
Amr and The Large Array
implementation
1300
x8455
558A
Lala Land and Apple Trees
brute force
,
implementation
,
sortings
1100
x11132
557E
Ann and Half-Palindrome
data structures
,
dp
,
graphs
,
string suffix structures
,
strings
,
trees
2300
x1276
557D
Vitaly and Cycle
combinatorics
,
dfs and similar
,
graphs
,
math
2000
x2478
557C
Arthur and Table
brute force
,
data structures
,
dp
,
greedy
,
math
,
sortings
1900
x4272
557B
Pasha and Tea
constructive algorithms
,
implementation
,
math
,
sortings
1500
x7550
557A
Ilya and Diplomas
greedy
,
implementation
,
math
1100
x8571
556B
Case of Fake Numbers
brute force
,
implementation
1100
x8293
556A
Case of the Zeros and Ones
greedy
900
x48266
555E
Case of Computer Network
dfs and similar
,
graphs
,
trees
2800
x3370
555D
Case of a Top Secret
binary search
,
implementation
,
math
2500
x974
555C
Case of Chocolate
data structures
2200
x2148
555B
Case of Fugitive
data structures
,
greedy
,
sortings
2000
x4186
555A
Case of Matryoshkas
implementation
1500
x6729
554B
Ohana Cleans Up
brute force
,
greedy
,
strings
1200
x11257
554A
Kyoya and Photobooks
brute force
,
math
,
strings
900
x14756
553E
Kyoya and Train
dp
,
fft
,
graphs
,
math
,
probabilities
3200
x742
553D
Nudist Beach
binary search
,
graphs
,
greedy
2300
x1123
553C
Love Triangles
dfs and similar
,
dsu
,
graphs
2200
x2011
553B
Kyoya and Permutation
binary search
,
combinatorics
,
constructive algorithms
,
greedy
,
implementation
,
math
1900
x2303
553A
Kyoya and Colored Balls
combinatorics
,
dp
,
math
1500
x10362
552E
Vanya and Brackets
brute force
,
dp
,
expression parsing
,
greedy
,
implementation
,
strings
2100
x1793
552D
Vanya and Triangles
brute force
,
combinatorics
,
data structures
,
geometry
,
math
,
sortings
1900
x4922
552C
Vanya and Scales
brute force
,
dp
,
greedy
,
math
,
meet-in-the-middle
,
number theory
1900
x5944
552B
Vanya and Books
implementation
,
math
1200
x16241
552A
Vanya and Table
implementation
,
math
1000
x10343
551E
GukiZ and GukiZiana
binary search
,
data structures
,
implementation
2500
x2303
551D
GukiZ and Binary Operations
combinatorics
,
implementation
,
math
,
matrices
,
number theory
2100
x2165
551C
GukiZ hates Boxes
binary search
,
greedy
2200
x4142
551B
ZgukistringZ
brute force
,
constructive algorithms
,
implementation
,
strings
1800
x4097
551A
GukiZ and Contest
brute force
,
implementation
,
sortings
800
x18111
550E
Brackets in Implications
constructive algorithms
,
greedy
,
implementation
,
math
2200
x1544
550D
Regular Bridge
constructive algorithms
,
graphs
,
implementation
1900
x3827
550C
Divisibility by Eight
brute force
,
dp
,
math
1500
x33236
550B
Preparing Olympiad
bitmasks
,
brute force
1400
x29927
550A
Two Substrings
brute force
,
dp
,
greedy
,
implementation
,
strings
1500
x45346
549H
Degenerate Matrix
binary search
,
math
2100
x2140
549G
Happy Line
constructive algorithms
,
greedy
,
sortings
2200
x2751
549F
Yura and Developers
data structures
,
divide and conquer
2800
x1119
549E
Sasha Circle
geometry
,
math
2700
x180
549D
Haar Features
greedy
,
implementation
1900
x2266
549C
The Game Of Parity
games
2200
x1876
549B
Looksery Party
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
2300
x1625
549A
Face Detection
implementation
,
strings
900
x10377
548B
Mike and Fun
brute force
,
dp
,
greedy
,
implementation
1400
x9156
548A
Mike and Fax
brute force
,
implementation
,
strings
1100
x10459
547E
Mike and Friends
data structures
,
string suffix structures
,
strings
,
trees
2800
x2894
547D
Mike and Fish
constructive algorithms
,
dfs and similar
,
graphs
2600
x3462
547C
Mike and Foam
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
2300
x3695
547B
Mike and Feet
binary search
,
data structures
,
dp
,
dsu
1900
x12233
547A
Mike and Frog
brute force
,
greedy
,
implementation
,
math
2200
x2822
546E
Soldier and Traveling
flows
,
graphs
,
math
2100
x4613
546D
Soldier and Number Game
constructive algorithms
,
dp
,
math
,
number theory
1700
x14424
546C
Soldier and Cards
brute force
,
dfs and similar
,
games
1400
x19857
546B
Soldier and Badges
brute force
,
greedy
,
implementation
,
sortings
1200
x18929
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x255206
545E
Paths and Trees
graphs
,
greedy
,
shortest paths
2000
x6114
545D
Queue
greedy
,
implementation
,
sortings
1300
x31417
545C
Woodcutters
dp
,
greedy
1500
x35330
545B
Equidistant String
greedy
1100
x12354
545A
Toy Cars
implementation
900
x12282
544B
Sea and Islands
constructive algorithms
,
implementation
1400
x9054
544A
Set of Strings
implementation
,
strings
1100
x8963
543E
Listening to Music
constructive algorithms
,
data structures
3200
x364
543D
Road Improvement
dp
,
trees
2300
x3574
543C
Remembering Strings
bitmasks
,
dp
2500
x1616
543B
Destroying Roads
constructive algorithms
,
graphs
,
shortest paths
2100
x4718
543A
Writing Code
dp
1800
x9185
542F
Quest
dp
,
greedy
2100
x1013
542E
Playing on Graph
graphs
,
shortest paths
2600
x1037
542D
Superhero's Job
dfs and similar
,
dp
,
hashing
,
math
,
number theory
2600
x547
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