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Codeforces Round 1133 (Div. 1, Div. 2) is coming soon! Register
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Codeforces Round 1133 (Div. 1)
02:06:08
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Codeforces Round 1133 (Div. 2)
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dp
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
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games
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graph matchings
graphs
greedy
hashing
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math
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Problems
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Name
2276E
Good Substrings
combinatorics
,
data structures
,
data structures
,
dp
,
greedy
,
greedy
,
strings
1800
x3244
2262A2
Floor of MEX (Hard Version)
dp
,
implementation
,
math
1800
x3290
2260E
Cyclic Balance
binary search
,
constructive algorithms
,
dp
,
math
2000
x2224
2260D
Signs of Prefix Sums
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
implementation
1700
x5526
2244G
Yura and Deadlines
data structures
,
dp
1900
x3270
2244F
Anya Loves Trees!
dfs and similar
,
dp
,
greedy
,
trees
,
trees
1700
x4910
2242D
Two Digit Strings
dp
,
strings
1600
x8624
2241E
Fair and Square
combinatorics
,
dp
,
graphs
,
math
,
number theory
,
trees
1600
x7106
2236E
Friendly Gifts
brute force
,
dp
1700
x6999
2232D
Magical Tiered Cake
constructive algorithms
,
constructive algorithms
,
dfs and similar
,
dp
,
greedy
2000
x2911
2230D
Good Schedule
dp
,
greedy
1700
x5778
2228C2
Cirno and Number (Hard Version)
binary search
,
dfs and similar
,
dp
,
greedy
,
implementation
1600
x6695
2227F
It Just Keeps Going Sideways
binary search
,
data structures
,
data structures
,
dp
,
dp
,
greedy
,
greedy
,
math
,
math
1700
x4832
2226D
Reserved Reversals
constructive algorithms
,
dp
,
greedy
,
math
1900
x3477
2223B
Zhily and Barknights
binary search
,
data structures
,
dp
,
math
,
sortings
,
two pointers
1600
x4184
2215A
Interval Mod
constructive algorithms
,
dp
,
greedy
,
math
1700
x4242
2207C
Where's My Water?
data structures
,
divide and conquer
,
dp
,
math
1600
x6794
2205D
Simons and Beating Peaks
data structures
,
data structures
,
divide and conquer
,
dp
,
dp
,
greedy
,
implementation
,
trees
1700
x5974
2201C
Rigged Bracket Sequence
combinatorics
,
dp
,
greedy
2000
x2344
2201A2
Lost Civilization (Hard Version)
data structures
,
dp
1700
x5787
2196C2
Interactive Graph (Hard Version)
combinatorics
,
dfs and similar
,
dp
,
graphs
,
interactive
2000
x2892
2196C1
Interactive Graph (Simple Version)
binary search
,
combinatorics
,
dfs and similar
,
dp
,
graphs
,
interactive
1800
x4079
2195F
Parabola Independence
dp
,
graphs
,
greedy
,
math
,
sortings
2000
x3108
2194E
The Turtle Strikes Back
dp
,
graphs
,
greedy
,
implementation
2000
x3066
2193F
Pizza Delivery
dp
,
greedy
1600
x9992
2192D
Cost of Tree
dp
,
greedy
,
trees
,
trees
1800
x4203
2190B2
Sub-RBS (Hard Version)
dp
,
games
,
implementation
,
strings
1900
x3527
2189D1
Little String (Easy Version)
combinatorics
,
dp
,
greedy
,
math
,
number theory
1900
x4405
2187B
Shortest Statement Ever
bitmasks
,
constructive algorithms
,
dp
,
greedy
1800
x5877
2184F
Cherry Tree
dfs and similar
,
dp
,
graphs
,
trees
1900
x4560
2184D
Unfair Game
combinatorics
,
dp
,
math
1600
x10788
2182D
Christmas Tree Decoration
combinatorics
,
dp
,
greedy
,
math
1600
x9828
2181M
Medical Parity
dp
,
strings
1700
x3943
2180D
Insolvable Disks
data structures
,
dp
,
greedy
,
math
2000
x4508
2180C
XOR-factorization
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
number theory
1900
x6953
2176D
Fibonacci Paths
data structures
,
dp
,
graphs
,
sortings
1800
x6374
2174B
Wishing Cards
dp
1900
x4435
2173D
Taiga's Carry Chains
bitmasks
,
brute force
,
dp
,
greedy
,
math
1900
x4012
2171F
Rae Taylor and Trees (hard version)
binary search
,
constructive algorithms
,
data structures
,
dp
,
dsu
,
greedy
,
implementation
,
trees
1600
x7999
2167G
Mukhammadali and the Smooth Array
data structures
,
dp
1600
x11908
2167F
Tree, TREE!!!
dfs and similar
,
dp
,
math
,
trees
1600
x8025
2165B
Marble Council
dp
,
math
,
sortings
1900
x6908
2157E
Adjusting Drones
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
implementation
,
sortings
1900
x5773
2153D
Not Alone
dp
,
greedy
1800
x6777
2145D
Inversion Value of a Permutation
constructive algorithms
,
dfs and similar
,
dp
1800
x7218
2144D
Price Tags
brute force
,
dp
,
math
1800
x7580
2143D1
Inversion Graph Coloring (Easy Version)
combinatorics
,
data structures
,
dp
,
greedy
,
two pointers
1800
x6988
2138C2
Maple and Tree Beauty (Hard Version)
bitmasks
,
brute force
,
dfs and similar
,
dp
,
fft
,
trees
2000
x3689
2138C1
Maple and Tree Beauty (Easy Version)
brute force
,
dfs and similar
,
dp
,
graphs
,
trees
1800
x5855
2133D
Chicken Jockey
dp
,
greedy
1900
x7997
2132D
From 1 to Infinity
binary search
,
dp
,
implementation
,
math
1600
x9416
2131G
Wafu!
bitmasks
,
brute force
,
data structures
,
dfs and similar
,
dp
,
math
2000
x3966
2129B
Stay or Mirror
brute force
,
data structures
,
dp
,
greedy
,
sortings
1600
x16334
2128E1
Submedians (Easy Version)
binary search
,
data structures
,
dp
,
greedy
,
math
1900
x6995
2128D
Sum of LDS
brute force
,
combinatorics
,
dp
,
greedy
,
math
1600
x13234
2125D
Segments Covering
dp
,
math
,
probabilities
1600
x9972
2118D1
Red Light, Green Light (Easy version)
brute force
,
dfs and similar
,
dp
,
graphs
,
implementation
,
number theory
1700
x8784
2114F
Small Operations
binary search
,
brute force
,
dfs and similar
,
dp
,
math
,
number theory
,
sortings
2000
x5743
2110D
Fewer Batteries
binary search
,
dfs and similar
,
dp
,
graphs
,
greedy
,
hashing
1700
x9054
2106F
Goblin
dfs and similar
,
dp
,
dsu
,
greedy
,
math
1900
x4677
2104E
Unpleasant Strings
binary search
,
dp
,
greedy
,
strings
1700
x8536
2096C
Wonderful City
dp
,
implementation
1700
x8618
2091F
Igor and Mountain
binary search
,
brute force
,
dp
1800
x6457
2086D
Even String
brute force
,
combinatorics
,
dp
,
math
,
strings
1700
x8809
2085C
Serval and The Formula
bitmasks
,
constructive algorithms
,
dp
,
greedy
1600
x14343
2081A
Math Division
bitmasks
,
dp
,
math
,
probabilities
1800
x4486
2078D
Scammy Game Ad
dp
,
greedy
,
implementation
1800
x6845
2075D
Equalization
bitmasks
,
brute force
,
dp
,
graphs
,
math
2000
x6217
2071D1
Infinite Sequence (Easy Version)
bitmasks
,
brute force
,
dp
,
implementation
,
math
1800
x6976
2071C
Trapmigiano Reggiano
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
greedy
,
sortings
,
trees
1700
x10119
2070D
Tree Jumps
dfs and similar
,
dp
,
trees
1600
x11913
2066B
White Magic
constructive algorithms
,
data structures
,
dp
,
greedy
,
implementation
1900
x5707
2064D
Eating
binary search
,
bitmasks
,
brute force
,
data structures
,
dp
,
greedy
,
trees
,
two pointers
1900
x6129
2063C
Remove Exactly Two
brute force
,
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
sortings
,
trees
1600
x15650
2061E
Kevin and And
bitmasks
,
brute force
,
dp
,
greedy
,
math
,
sortings
2000
x4158
2061C
Kevin and Puzzle
2-sat
,
combinatorics
,
dp
1600
x10527
2053E
Resourceful Caterpillar Sequence
dfs and similar
,
dp
,
games
,
graphs
,
greedy
,
trees
1900
x4668
2052F
Fix Flooded Floor
constructive algorithms
,
dp
,
graphs
1700
x4007
2050G
Tree Destruction
dfs and similar
,
dp
,
trees
1900
x5742
2049D
Shift + Esc
brute force
,
dp
1900
x6313
2044G2
Medium Demon Problem (hard version)
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
trees
1900
x4172
2043C
Sums on Segments
binary search
,
brute force
,
data structures
,
dp
,
greedy
,
math
1600
x11770
2041C
Cube
bitmasks
,
dfs and similar
,
dp
2000
x2172
2037G
Natlan Exploring
bitmasks
,
combinatorics
,
data structures
,
dp
,
math
,
number theory
2000
x4014
2037E
Kachina's Favorite Binary String
dp
,
greedy
,
interactive
,
two pointers
1600
x7746
2036F
XORificator 3000
bitmasks
,
dp
,
number theory
,
two pointers
1900
x5697
2031D
Penchick and Desert Rabbit
binary search
,
data structures
,
dfs and similar
,
dp
,
dsu
,
greedy
,
implementation
,
two pointers
1700
x10343
2029C
New Rating
binary search
,
data structures
,
dp
,
greedy
1700
x8020
2028D
Alice's Adventures in Cards
constructive algorithms
,
data structures
,
dp
,
graphs
,
greedy
,
implementation
,
ternary search
2000
x3899
2028C
Alice's Adventures in Cutting Cake
binary search
,
dp
,
greedy
,
two pointers
1600
x10517
2027D1
The Endspeaker (Easy Version)
binary search
,
dp
,
graphs
,
greedy
,
implementation
,
two pointers
1700
x7289
2026D
Sums of Segments
binary search
,
data structures
,
dp
,
implementation
,
math
1900
x6367
2025D
Attribute Checks
brute force
,
data structures
,
dp
,
implementation
,
math
,
two pointers
1800
x8277
2023B
Skipping
binary search
,
dp
,
graphs
,
shortest paths
1700
x7475
2022C
Gerrymandering
dp
,
implementation
1800
x7060
2020E
Expected Power
bitmasks
,
dp
,
math
,
probabilities
2000
x4237
2020D
Connect the Dots
brute force
,
dp
,
dsu
,
graphs
,
math
,
trees
1800
x7719
2018B
Speedbreaker
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
two pointers
1900
x5440
2014F
Sheriff's Defense
dfs and similar
,
dp
,
greedy
,
trees
2000
x5634
2005C
Lazy Narek
dp
,
implementation
,
strings
1800
x8976
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