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Codeforces Round 1133 (Div. 1, Div. 2) is coming soon! Register
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Codeforces Round 1133 (Div. 1)
20:10:42
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Codeforces Round 1133 (Div. 2)
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→ Filter Problems
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constructive algorithms
combine-tags-by-or
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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
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number theory
probabilities
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shortest paths
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string suffix structures
strings
ternary search
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Problems
#
Name
1749E
Cactus Wall
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
2400
x2214
1748F
Circular Xor Reversal
bitmasks
,
constructive algorithms
3000
x423
1748D
ConstructOR
bitmasks
,
chinese remainder theorem
,
combinatorics
,
constructive algorithms
,
math
,
number theory
2100
x3383
1747D
Yet Another Problem
binary search
,
bitmasks
,
constructive algorithms
,
data structures
1900
x5830
1747B
BAN BAN
constructive algorithms
900
x26550
1747A
Two Groups
constructive algorithms
,
greedy
800
x26736
1746E1
Joking (Easy Version)
binary search
,
constructive algorithms
,
interactive
,
ternary search
2500
x1868
1746C
Permutation Operations
constructive algorithms
,
greedy
,
implementation
,
math
1300
x14381
1746B
Rebellion
constructive algorithms
,
greedy
,
two pointers
800
x18932
1746A
Maxmina
constructive algorithms
,
greedy
800
x21255
1743G
Antifibonacci Cut
bitmasks
,
combinatorics
,
constructive algorithms
,
data structures
,
dp
,
hashing
,
math
3000
x459
1743C
Save the Magazines
constructive algorithms
,
dp
,
greedy
1100
x20957
1743B
Permutation Value
constructive algorithms
,
greedy
800
x23377
1742F
Smaller
constructive algorithms
,
greedy
,
strings
1500
x14588
1741B
Funny Permutation
constructive algorithms
,
math
800
x27037
1740G
Dangerous Laser Power
constructive algorithms
,
dsu
,
sortings
3100
x424
1740E
Hanging Hearts
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
greedy
,
trees
1800
x5198
1740D
Knowledge Cards
constructive algorithms
,
data structures
1500
x9263
1740C
Bricks and Bags
constructive algorithms
,
games
,
greedy
,
sortings
1400
x12537
1740A
Factorise N+M
constructive algorithms
,
number theory
800
x23689
1739C
Card Game
combinatorics
,
constructive algorithms
,
dp
,
games
1500
x10344
1739B
Array Recovery
constructive algorithms
,
greedy
,
math
1100
x24816
1738G
Anti-Increasing Addicts
constructive algorithms
,
dp
,
greedy
,
math
2900
x595
1738F
Connectivity Addicts
constructive algorithms
,
dsu
,
graphs
,
greedy
,
interactive
,
shortest paths
,
trees
2400
x1440
1738D
Permutation Addicts
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
trees
1900
x3807
1738B
Prefix Sum Addicts
constructive algorithms
,
greedy
,
math
,
sortings
1200
x19499
1737F
Ela and Prime GCD
constructive algorithms
,
math
,
number theory
3300
x167
1737C
Ela and Crickets
constructive algorithms
,
games
,
implementation
,
math
1500
x6524
1736D
Equal Binary Subsequences
constructive algorithms
,
geometry
,
greedy
,
implementation
,
strings
2200
x2846
1735E
House Planning
constructive algorithms
,
data structures
,
graph matchings
,
greedy
2400
x1287
1735A
Working Week
constructive algorithms
,
greedy
,
math
800
x21195
1734E
Rectangular Congruence
constructive algorithms
,
number theory
2100
x3354
1734B
Bright, Nice, Brilliant
constructive algorithms
800
x16515
1733E
Conveyor
constructive algorithms
,
dp
,
math
2700
x1754
1733D1
Zero-One (Easy Version)
constructive algorithms
,
greedy
,
math
1400
x15300
1733C
Parity Shuffle Sorting
constructive algorithms
,
sortings
1300
x17348
1733B
Rule of League
constructive algorithms
,
math
900
x21415
1732A
Bestie
brute force
,
combinatorics
,
constructive algorithms
,
implementation
,
math
,
number theory
1000
x18147
1730D
Prefixes and Suffixes
constructive algorithms
,
strings
,
two pointers
2200
x3120
1729C
Jumping on Tiles
constructive algorithms
,
strings
1100
x21878
1728D
Letter Picking
constructive algorithms
,
dp
,
games
,
two pointers
1800
x8534
1728B
Best Permutation
constructive algorithms
,
greedy
800
x20842
1726D
Edge Split
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
probabilities
,
trees
2000
x4333
1726B
Mainak and Interesting Sequence
bitmasks
,
constructive algorithms
,
math
1100
x17192
1725H
Hot Black Hot White
constructive algorithms
,
math
1800
x3079
1722G
Even-Odd XOR
bitmasks
,
constructive algorithms
,
greedy
1500
x15004
1721F
Matching Reduction
brute force
,
constructive algorithms
,
dfs and similar
,
flows
,
graph matchings
,
graphs
,
interactive
2800
x703
1720E
Misha and Paintings
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
2700
x1119
1719B
Mathematical Circus
constructive algorithms
,
math
800
x19259
1718E
Impressionism
constructive algorithms
,
graphs
,
implementation
,
math
3500
x255
1717F
Madoka and The First Session
constructive algorithms
,
flows
,
graph matchings
,
graphs
,
implementation
2500
x809
1717D
Madoka and The Corruption Scheme
combinatorics
,
constructive algorithms
,
greedy
,
math
1900
x4982
1717B
Madoka and Underground Competitions
constructive algorithms
,
implementation
1100
x15789
1716B
Permutation Chain
constructive algorithms
,
math
800
x22164
1715F
Crop Squares
constructive algorithms
,
geometry
,
interactive
,
math
2700
x612
1715B
Beautiful Array
constructive algorithms
,
greedy
,
math
1000
x37734
1715A
Crossmarket
constructive algorithms
,
greedy
,
math
800
x24544
1714F
Build a Tree and That Is It
constructive algorithms
,
implementation
,
trees
1900
x3808
1713F
Lost Array
bitmasks
,
combinatorics
,
constructive algorithms
,
dp
,
math
2900
x795
1713D
Tournament Countdown
constructive algorithms
,
greedy
,
interactive
,
number theory
,
probabilities
1800
x6359
1713C
Build Permutation
constructive algorithms
,
dp
,
math
1200
x19149
1713B
Optimal Reduction
constructive algorithms
,
sortings
1000
x22990
1712D
Empty Graph
binary search
,
constructive algorithms
,
data structures
,
greedy
,
shortest paths
2000
x5257
1712B
Woeful Permutation
constructive algorithms
,
greedy
,
number theory
800
x22543
1711A
Perfect Permutation
constructive algorithms
800
x26779
1710D
Recover the Tree
constructive algorithms
,
trees
3400
x572
1710C
XOR Triangle
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
greedy
,
math
2500
x1708
1710A
Color the Picture
constructive algorithms
,
greedy
,
math
1500
x12068
1709C
Recover an RBS
constructive algorithms
,
greedy
,
implementation
,
strings
1800
x10864
1708B
Difference of GCDs
constructive algorithms
,
math
1100
x31164
1707F
Bugaboo
bitmasks
,
constructive algorithms
,
dp
,
number theory
3500
x187
1707A
Doremy's IQ
binary search
,
constructive algorithms
,
greedy
,
implementation
1600
x15871
1706D2
Chopping Carrots (Hard Version)
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
2400
x2004
1706D1
Chopping Carrots (Easy Version)
binary search
,
brute force
,
constructive algorithms
,
greedy
,
number theory
1700
x7852
1706A
Another String Minimization Problem
2-sat
,
constructive algorithms
,
greedy
,
string suffix structures
,
strings
800
x24437
1705F
Mark and the Online Exam
bitmasks
,
constructive algorithms
,
interactive
,
probabilities
2900
x737
1705D
Mark and Lightbulbs
combinatorics
,
constructive algorithms
,
greedy
,
math
,
sortings
1800
x7302
1705B
Mark the Dust Sweeper
constructive algorithms
,
greedy
,
implementation
900
x25983
1704H1
Game of AI (easy version)
combinatorics
,
constructive algorithms
,
dp
,
fft
,
math
3200
x402
1704G
Mio and Lucky Array
constructive algorithms
,
fft
,
math
,
strings
3500
x187
1704F
Colouring Game
constructive algorithms
,
dp
,
games
2600
x1402
1704E
Count Seconds
brute force
,
constructive algorithms
,
dp
,
graphs
,
implementation
,
math
2200
x2779
1704D
Magical Array
constructive algorithms
,
hashing
,
implementation
,
math
1900
x5464
1704A
Two 0-1 Sequences
constructive algorithms
,
greedy
800
x16782
1702F
Equate Multisets
constructive algorithms
,
data structures
,
greedy
,
math
,
number theory
1700
x9723
1702A
Round Down the Price
constructive algorithms
800
x39323
1700F
Puzzle
constructive algorithms
,
dp
,
greedy
2600
x1128
1700E
Serega the Pirate
brute force
,
constructive algorithms
2600
x1022
1700C
Helping the Nature
constructive algorithms
,
data structures
,
greedy
1700
x12474
1700B
Palindromic Numbers
constructive algorithms
,
implementation
,
math
1100
x20225
1700A
Optimal Path
constructive algorithms
,
greedy
,
math
800
x23805
1699C
The Third Problem
combinatorics
,
constructive algorithms
,
math
1700
x10923
1699B
Almost Ternary Matrix
bitmasks
,
constructive algorithms
,
matrices
900
x22157
1699A
The Third Three Number Problem
constructive algorithms
,
math
800
x24990
1698F
Equal Reversal
constructive algorithms
,
graphs
,
implementation
,
math
2800
x792
1698D
Fixed Point Guessing
binary search
,
constructive algorithms
,
interactive
1600
x12877
1698B
Rising Sand
constructive algorithms
,
greedy
,
implementation
800
x21599
1697F
Too Many Constraints
2-sat
,
constructive algorithms
,
graphs
,
implementation
2800
x893
1697E
Coloring
brute force
,
combinatorics
,
constructive algorithms
,
dp
,
geometry
,
graphs
,
greedy
,
implementation
,
math
2400
x1509
1697D
Guess The String
binary search
,
constructive algorithms
,
interactive
1900
x5143
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