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Codeforces Round 953 (Div. 2)
09:01:45
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math
combine-tags-by-or
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2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
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
1728E
Red-Black Pepper
brute force
,
data structures
,
greedy
,
math
,
number theory
2300
x1668
1726H
Mainak and the Bleeding Polygon
binary search
,
geometry
,
implementation
,
math
3500
x82
1726E
Almost Perfect
combinatorics
,
fft
,
math
2400
x1365
1726B
Mainak and Interesting Sequence
bitmasks
,
constructive algorithms
,
math
1100
x14803
1726A
Mainak and Array
greedy
,
math
900
x20344
1725H
Hot Black Hot White
constructive algorithms
,
math
1800
x2524
1725G
Garage
binary search
,
geometry
,
math
1500
x5669
1725E
Electrical Efficiency
combinatorics
,
data structures
,
dp
,
math
,
number theory
,
trees
2500
x441
1725D
Deducing Sortability
binary search
,
bitmasks
,
math
2900
x119
1725C
Circular Mirror
binary search
,
combinatorics
,
geometry
,
math
,
two pointers
2000
x1559
1725A
Accumulation of Dominoes
math
800
x9102
1720E
Misha and Paintings
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
2700
x748
1720B
Interesting Sum
brute force
,
data structures
,
greedy
,
math
,
sortings
800
x20841
1720A
Burenka Plays with Fractions
math
,
number theory
900
x21913
1719B
Mathematical Circus
constructive algorithms
,
math
800
x18343
1719A
Chip Game
games
,
math
800
x25096
1718F
Burenka, an Array and Queries
data structures
,
math
,
number theory
3300
x146
1718E
Impressionism
constructive algorithms
,
graphs
,
implementation
,
math
3500
x105
1718D
Permutation for Burenka
data structures
,
graph matchings
,
greedy
,
math
,
trees
3300
x291
1718C
Tonya and Burenka-179
data structures
,
greedy
,
math
,
number theory
2400
x1534
1718B
Fibonacci Strings
greedy
,
implementation
,
math
,
number theory
2000
x2903
1717E
Madoka and The Best University
math
,
number theory
2200
x2525
1717D
Madoka and The Corruption Scheme
combinatorics
,
constructive algorithms
,
greedy
,
math
1900
x4294
1717A
Madoka and Strange Thoughts
math
,
number theory
800
x19229
1716F
Bags with Balls
combinatorics
,
dp
,
math
,
number theory
2500
x1007
1716D
Chip Move
brute force
,
dp
,
math
2000
x5040
1716B
Permutation Chain
constructive algorithms
,
math
800
x21247
1716A
2-3 Moves
greedy
,
math
800
x31802
1715F
Crop Squares
constructive algorithms
,
geometry
,
interactive
,
math
2700
x504
1715C
Monoblock
combinatorics
,
data structures
,
implementation
,
math
1700
x8426
1715B
Beautiful Array
constructive algorithms
,
greedy
,
math
1000
x20514
1715A
Crossmarket
constructive algorithms
,
greedy
,
math
800
x23288
1714E
Add Modulo 10
brute force
,
math
,
number theory
1400
x15621
1714A
Everyone Loves to Sleep
implementation
,
math
900
x28876
1713F
Lost Array
bitmasks
,
combinatorics
,
constructive algorithms
,
dp
,
math
2900
x515
1713C
Build Permutation
constructive algorithms
,
dp
,
math
1200
x16935
1712E2
LCM Sum (hard version)
brute force
,
data structures
,
math
,
number theory
,
two pointers
2500
x1191
1712E1
LCM Sum (easy version)
binary search
,
brute force
,
combinatorics
,
math
,
number theory
,
two pointers
2300
x2060
1710C
XOR Triangle
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
greedy
,
math
2500
x1288
1710B
Rain
binary search
,
brute force
,
data structures
,
geometry
,
greedy
,
implementation
,
math
2100
x2371
1710A
Color the Picture
constructive algorithms
,
greedy
,
math
1500
x10682
1709F
Multiset of Strings
bitmasks
,
brute force
,
dp
,
fft
,
flows
,
graphs
,
math
,
meet-in-the-middle
,
trees
2500
x538
1709D
Rorororobot
binary search
,
data structures
,
greedy
,
math
1700
x8170
1709A
Three Doors
brute force
,
greedy
,
implementation
,
math
800
x29188
1708B
Difference of GCDs
constructive algorithms
,
math
1100
x19805
1708A
Difference Operations
greedy
,
math
800
x21544
1707D
Partial Virtual Trees
combinatorics
,
dfs and similar
,
dp
,
math
,
trees
3000
x590
1706D2
Chopping Carrots (Hard Version)
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
2400
x1662
1706B
Making Towers
dp
,
greedy
,
math
1100
x16289
1705D
Mark and Lightbulbs
combinatorics
,
constructive algorithms
,
greedy
,
math
,
sortings
1800
x6157
1704H2
Game of AI (hard version)
combinatorics
,
fft
,
math
3500
x79
1704H1
Game of AI (easy version)
combinatorics
,
constructive algorithms
,
dp
,
fft
,
math
3200
x173
1704G
Mio and Lucky Array
constructive algorithms
,
fft
,
math
,
strings
3500
x99
1704E
Count Seconds
brute force
,
constructive algorithms
,
dp
,
graphs
,
implementation
,
math
2200
x2243
1704D
Magical Array
constructive algorithms
,
hashing
,
implementation
,
math
1900
x4892
1703G
Good Key, Bad Key
bitmasks
,
brute force
,
dp
,
greedy
,
math
1600
x10185
1702F
Equate Multisets
constructive algorithms
,
data structures
,
greedy
,
math
,
number theory
1700
x8050
1701F
Points
combinatorics
,
data structures
,
implementation
,
math
,
matrices
2500
x902
1701D
Permutation Restoration
binary search
,
data structures
,
greedy
,
math
,
sortings
,
two pointers
1900
x5544
1700D
River Locks
binary search
,
dp
,
greedy
,
math
1900
x5889
1700B
Palindromic Numbers
constructive algorithms
,
implementation
,
math
1100
x18364
1700A
Optimal Path
constructive algorithms
,
greedy
,
math
800
x22636
1699E
Three Days Grace
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
2600
x1106
1699C
The Third Problem
combinatorics
,
constructive algorithms
,
math
1700
x9490
1699A
The Third Three Number Problem
constructive algorithms
,
math
800
x23718
1698G
Long Binary String
bitmasks
,
math
,
matrices
,
meet-in-the-middle
,
number theory
2900
x307
1698F
Equal Reversal
constructive algorithms
,
graphs
,
implementation
,
math
2800
x597
1697E
Coloring
brute force
,
combinatorics
,
constructive algorithms
,
dp
,
geometry
,
graphs
,
greedy
,
implementation
,
math
2400
x1152
1696H
Maximum Product?
brute force
,
combinatorics
,
dp
,
greedy
,
implementation
,
math
,
two pointers
3500
x156
1696G
Fishingprince Plays With Array Again
brute force
,
data structures
,
geometry
,
math
3300
x268
1696E
Placing Jinas
combinatorics
,
math
2000
x3887
1696C
Fishingprince Plays With Array
constructive algorithms
,
greedy
,
implementation
,
math
1400
x11372
1692H
Gambling
data structures
,
dp
,
greedy
,
math
1700
x7168
1692F
3SUM
brute force
,
math
1300
x21710
1691F
K-Set Tree
combinatorics
,
dfs and similar
,
dp
,
math
,
trees
2500
x930
1691C
Sum of Substrings
brute force
,
constructive algorithms
,
greedy
,
math
,
strings
1400
x15225
1691A
Beat The Odds
brute force
,
greedy
,
math
800
x30029
1690F
Shifting String
graphs
,
math
,
number theory
,
strings
1700
x6898
1690E
Price Maximization
binary search
,
greedy
,
math
,
two pointers
1500
x14683
1687F
Koishi's Unconscious Permutation
fft
,
math
3500
x79
1687E
Become Big For Me
combinatorics
,
constructive algorithms
,
greedy
,
math
,
number theory
3500
x221
1687D
Cute number
binary search
,
brute force
,
data structures
,
dsu
,
implementation
,
math
2900
x560
1684H
Hard Cut
constructive algorithms
,
dfs and similar
,
divide and conquer
,
math
3400
x236
1684G
Euclid Guess
constructive algorithms
,
flows
,
graph matchings
,
math
,
number theory
2800
x583
1684B
Z mod X = C
constructive algorithms
,
math
800
x20699
1684A
Digit Minimization
constructive algorithms
,
games
,
math
,
strings
800
x23603
1682E
Unordered Swaps
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
math
,
sortings
,
trees
2700
x567
1682C
LIS or Reverse LIS?
constructive algorithms
,
greedy
,
implementation
,
math
1400
x14267
1681B
Card Trick
implementation
,
math
800
x19898
1680D
Dog Walking
brute force
,
greedy
,
math
2400
x1129
1680A
Minimums and Maximums
brute force
,
math
800
x21080
1679F
Formalism for Formalism
bitmasks
,
dp
,
math
2600
x507
1679A
AvtoBus
brute force
,
greedy
,
math
,
number theory
900
x22477
1677F
Tokitsukaze and Gems
dp
,
math
3500
x88
1677D
Tokitsukaze and Permutations
dp
,
math
2500
x1222
1677B
Tokitsukaze and Meeting
data structures
,
implementation
,
math
1700
x4075
1676C
Most Similar Words
brute force
,
greedy
,
implementation
,
implementation
,
math
,
strings
800
x29120
1676B
Equal Candies
greedy
,
math
,
sortings
800
x45957
1675A
Food for Animals
greedy
,
math
800
x31859
1674E
Breaking the Wall
binary search
,
brute force
,
constructive algorithms
,
greedy
,
math
2000
x6214
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