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Before contest
Codeforces Round 1096 (Div. 3)
20:15:57
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Difficulty:
—
dp
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
2217H
Closer
dfs and similar
,
dp
,
trees
2800
x192
2217G
Down the Pivot
combinatorics
,
dp
,
math
,
trees
2600
x328
2217F
Interval Game
bitmasks
,
combinatorics
,
constructive algorithms
,
dp
,
games
,
games
,
greedy
,
greedy
,
math
,
probabilities
2300
x677
2215D
EXPloration, EXPloitation, and Gain Some EXPerience!
bitmasks
,
brute force
,
dp
,
greedy
,
implementation
2800
x106
2215A
Interval Mod
constructive algorithms
,
dp
,
greedy
,
math
1700
x2323
2211F
Learning Binary Search
combinatorics
,
divide and conquer
,
dp
,
math
2400
x899
2211E
Minimum Path Cover
brute force
,
dp
,
greedy
,
interactive
,
interactive
,
math
,
number theory
,
trees
2500
x841
2210C2
A Simple GCD Problem (Hard Version)
dp
,
greedy
,
number theory
2100
x2118
2209E
A Trivial String Problem
brute force
,
dp
,
hashing
,
string suffix structures
,
strings
2200
x1733
2208E
Counting Cute Arrays
combinatorics
,
dp
2700
x417
2207F
Hanabi
binary search
,
data structures
,
dp
,
dsu
,
flows
,
graph matchings
,
graphs
,
greedy
2900
x268
2207D
Boxed Like a Fish
dfs and similar
,
dp
,
games
,
shortest paths
,
trees
2200
x2095
2207C
Where's My Water?
data structures
,
divide and conquer
,
dp
,
math
1600
x5357
2206I
Growth Factor
combinatorics
,
dp
,
math
,
number theory
2900
x164
2206D
Christmas Tree Un-decoration
data structures
,
dp
,
trees
2600
x235
2205E
Simons and Dividing the Rhythm
combinatorics
,
data structures
,
dp
,
dsu
,
math
,
string suffix structures
,
strings
,
strings
,
strings
2100
x1552
2205D
Simons and Beating Peaks
data structures
,
data structures
,
divide and conquer
,
dp
,
dp
,
greedy
,
implementation
,
trees
1700
x4862
2204G
Grid Path
dp
,
dp
,
graphs
,
matrices
2700
x398
2203F
Binary Search with One Swap
binary search
,
divide and conquer
,
dp
,
hashing
,
math
,
two pointers
2600
x409
2201C
Rigged Bracket Sequence
combinatorics
,
dp
,
greedy
2000
x1972
2201A2
Lost Civilization (Hard Version)
data structures
,
dp
1700
x5056
2200G
Operation Permutation
combinatorics
,
dp
,
math
,
probabilities
2200
x1013
2199H
Sum of MEX
*special problem
,
combinatorics
,
data structures
,
dp
,
math
2300
x90
2196E2
Fuzzy Concatenation (Hard version)
binary search
,
bitmasks
,
data structures
,
dp
,
greedy
,
string suffix structures
3000
x198
2196D
Double Bracket Sequence
data structures
,
dp
,
expression parsing
,
flows
,
greedy
,
strings
2500
x987
2196C2
Interactive Graph (Hard Version)
combinatorics
,
dfs and similar
,
dp
,
graphs
,
interactive
2000
x2504
2196C1
Interactive Graph (Simple Version)
binary search
,
combinatorics
,
dfs and similar
,
dp
,
graphs
,
interactive
1800
x3571
2195G
Idiot First Search and Queries
binary search
,
data structures
,
dp
,
graphs
,
trees
2300
x1037
2195F
Parabola Independence
dp
,
graphs
,
greedy
,
math
,
sortings
2000
x2681
2195E
Idiot First Search
dfs and similar
,
dp
,
trees
1500
x8490
2194F2
Again Trees... (hard version)
bitmasks
,
data structures
,
dfs and similar
,
dp
,
fft
,
trees
3000
x167
2194F1
Again Trees... (Easy Version)
bitmasks
,
dfs and similar
,
dp
,
trees
2300
x883
2194E
The Turtle Strikes Back
dp
,
graphs
,
greedy
,
implementation
2000
x2603
2193H
Remove the Grail Tree
dfs and similar
,
dp
,
graphs
,
greedy
,
implementation
,
trees
2400
x1042
2193F
Pizza Delivery
dp
,
greedy
1600
x8409
2192F
Fish Fight
dp
,
dp
,
math
,
probabilities
,
probabilities
2900
x172
2192D
Cost of Tree
dp
,
greedy
,
trees
,
trees
1800
x3515
2190F
Xor Product
bitmasks
,
dp
3300
x92
2190B2
Sub-RBS (Hard Version)
dp
,
games
,
implementation
,
strings
1900
x3173
2189F
Zhora the Vacuum Cleaner
data structures
,
dfs and similar
,
dp
,
greedy
,
implementation
,
sortings
,
trees
2800
x225
2189D2
Little String (Hard Version)
combinatorics
,
dp
,
greedy
,
math
,
number theory
2200
x1937
2189D1
Little String (Easy Version)
combinatorics
,
dp
,
greedy
,
math
,
number theory
1900
x3948
2187F2
Al Fine (Counting Version)
dp
,
trees
3500
x70
2187E
Doors and Keys
brute force
,
data structures
,
dp
3500
x318
2187D
Cool Problem
bitmasks
,
dp
,
math
2600
x624
2187B
Shortest Statement Ever
bitmasks
,
constructive algorithms
,
dp
,
greedy
1800
x5253
2185H
BattleCows 2
binary search
,
brute force
,
data structures
,
dp
,
greedy
2500
x679
2184F
Cherry Tree
dfs and similar
,
dp
,
graphs
,
trees
1900
x3876
2184D
Unfair Game
combinatorics
,
dp
,
math
1600
x9460
2183H
Minimise Cost
binary search
,
dp
,
greedy
,
sortings
3500
x159
2183F
Jumping Man
brute force
,
combinatorics
,
dfs and similar
,
dp
,
trees
2500
x1118
2183E
LCM is Legendary Counting Master
dp
,
math
,
number theory
2100
x2847
2182G
Short Garland
combinatorics
,
data structures
,
dfs and similar
,
dp
,
trees
2800
x349
2182F1
Christmas Reindeer (easy version)
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
2300
x1267
2182D
Christmas Tree Decoration
combinatorics
,
dp
,
greedy
,
math
1600
x8920
2181M
Medical Parity
dp
,
strings
1700
x3452
2181J
Jinx or Jackpot
brute force
,
dp
,
math
,
probabilities
2300
x704
2181G
Greta's Game
binary search
,
dp
,
graphs
,
greedy
,
math
2400
x638
2180F2
Control Car (Hard Version)
combinatorics
,
dp
,
matrices
,
probabilities
3200
x223
2180F1
Control Car (Easy Version)
combinatorics
,
dp
,
probabilities
2800
x405
2180E
No Effect XOR
bitmasks
,
divide and conquer
,
dp
,
greedy
,
math
2300
x1736
2180D
Insolvable Disks
data structures
,
dp
,
greedy
,
math
1900
x4245
2180C
XOR-factorization
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
number theory
1900
x6445
2179H
Blackslex and Plants
bitmasks
,
data structures
,
dp
,
implementation
,
math
2200
x1296
2178I
Numbers or Fireworks
bitmasks
,
combinatorics
,
dp
,
graphs
3300
x219
2178G
deCH OR Dations
bitmasks
,
data structures
,
dp
,
hashing
,
probabilities
2800
x593
2176F
Omega Numbers
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
2400
x1483
2176E
Remove at the lowest cost
data structures
,
dfs and similar
,
dp
,
dsu
,
greedy
,
implementation
,
trees
2400
x1270
2176D
Fibonacci Paths
data structures
,
dp
,
graphs
,
sortings
1800
x5747
2174F
Mosaic Tree
combinatorics
,
dp
,
fft
,
math
,
trees
2800
x465
2174D
Secret Message
data structures
,
dp
,
greedy
,
trees
3400
x291
2174B
Wishing Cards
dp
1900
x3957
2173D
Taiga's Carry Chains
bitmasks
,
brute force
,
dp
,
greedy
,
math
1900
x3626
2172L
Maximum Color Segment
dp
,
implementation
2300
x796
2172D
Divisor Card Game
combinatorics
,
dp
3100
x102
2171H
Shiori Miyagi and Maximum Array Score
binary search
,
data structures
,
dp
,
sortings
2400
x1011
2171F
Rae Taylor and Trees (hard version)
binary search
,
constructive algorithms
,
data structures
,
dp
,
dsu
,
greedy
,
implementation
,
trees
1600
x7098
2170F
Build XOR on a Segment
bitmasks
,
dp
2600
x775
2170E
Binary Strings and Blocks
combinatorics
,
data structures
,
dp
2100
x2314
2169F
Subsequence Problem
combinatorics
,
dp
,
fft
,
math
2700
x330
2169E
Points Selection
dp
,
greedy
2400
x1039
2167G
Mukhammadali and the Smooth Array
data structures
,
dp
1600
x10992
2167F
Tree, TREE!!!
dfs and similar
,
dp
,
math
,
trees
1600
x7109
2165E
Rainbow Branch
constructive algorithms
,
dp
,
greedy
,
trees
3200
x255
2165B
Marble Council
dp
,
math
,
sortings
1900
x4525
2164F2
Chain Prefix Rank (Hard Version)
binary search
,
combinatorics
,
data structures
,
dfs and similar
,
dp
,
graphs
,
math
,
trees
2900
x420
2164F1
Chain Prefix Rank (Easy Version)
combinatorics
,
dfs and similar
,
dp
,
math
,
trees
2600
x648
2163C
Monopati
brute force
,
combinatorics
,
dp
,
math
,
two pointers
1500
x8992
2162H
Beautiful Problem
dp
2900
x312
2161D
Locked Out
binary search
,
data structures
,
dp
,
greedy
2100
x2764
2159D2
Inverse Minimum Partition (Hard Version)
dp
,
greedy
,
math
3200
x393
2159D1
Inverse Minimum Partition (Easy Version)
binary search
,
brute force
,
dp
,
geometry
,
greedy
,
math
,
two pointers
2500
x1017
2159B
Rectangles
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
implementation
,
two pointers
2100
x2306
2157I
Hyper Smawk Bros
dp
,
dp
,
games
3500
x171
2157G
Isaac's Queries
bitmasks
,
brute force
,
constructive algorithms
,
dfs and similar
,
divide and conquer
,
dp
,
greedy
,
interactive
,
math
,
probabilities
2800
x408
2157E
Adjusting Drones
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
implementation
,
sortings
1900
x3560
2156E
Best Time to Buy and Sell Stock
binary search
,
brute force
,
data structures
,
dp
,
games
,
graphs
,
greedy
2500
x959
2154F2
Bombing (Hard Version)
combinatorics
,
dp
3300
x175
2153D
Not Alone
dp
,
greedy
1800
x6279
2152H1
Victorious Coloring (Easy Version)
dfs and similar
,
dp
,
greedy
2900
x608
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