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Problems
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Name
1741C
Minimize the Thickness
brute force
,
greedy
,
math
,
two pointers
1100
x17236
1738E
Balance Addicts
combinatorics
,
dp
,
math
,
two pointers
2300
x1459
1736C2
Good Subarrays (Hard Version)
binary search
,
data structures
,
dp
,
two pointers
2400
x1243
1736C1
Good Subarrays (Easy Version)
binary search
,
data structures
,
schedules
,
two pointers
1300
x14554
1734D
Slime Escape
data structures
,
dp
,
greedy
,
two pointers
1800
x6047
1732C2
Sheikh (Hard Version)
binary search
,
bitmasks
,
brute force
,
greedy
,
implementation
,
two pointers
2100
x2463
1732C1
Sheikh (Easy version)
binary search
,
bitmasks
,
greedy
,
two pointers
1800
x5583
1731D
Valiant's New Map
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x6764
1730D
Prefixes and Suffixes
constructive algorithms
,
strings
,
two pointers
2200
x2598
1729G
Cut Substrings
combinatorics
,
dp
,
hashing
,
strings
,
two pointers
2100
x2064
1729D
Friends and the Restaurant
greedy
,
sortings
,
two pointers
1200
x18943
1728G
Illumination
binary search
,
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
,
two pointers
2700
x424
1728D
Letter Picking
constructive algorithms
,
dp
,
games
,
two pointers
1800
x6894
1725C
Circular Mirror
binary search
,
combinatorics
,
geometry
,
math
,
two pointers
2000
x1542
1721C
Min-Max Array Transformation
binary search
,
greedy
,
two pointers
1400
x12998
1720D1
Xor-Subsequence (easy version)
bitmasks
,
brute force
,
dp
,
strings
,
trees
,
two pointers
1800
x5739
1719C
Fighting Tournament
binary search
,
data structures
,
implementation
,
two pointers
1400
x12888
1712E2
LCM Sum (hard version)
brute force
,
data structures
,
math
,
number theory
,
two pointers
2500
x1183
1712E1
LCM Sum (easy version)
binary search
,
brute force
,
combinatorics
,
math
,
number theory
,
two pointers
2300
x2046
1706D2
Chopping Carrots (Hard Version)
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
2400
x1654
1701D
Permutation Restoration
binary search
,
data structures
,
greedy
,
math
,
sortings
,
two pointers
1900
x5492
1701C
Schedule Management
binary search
,
greedy
,
implementation
,
two pointers
1400
x15820
1699E
Three Days Grace
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
2600
x1087
1698E
PermutationForces II
brute force
,
combinatorics
,
greedy
,
sortings
,
trees
,
two pointers
2300
x1577
1697C
awoo's Favorite Problem
binary search
,
constructive algorithms
,
data structures
,
greedy
,
implementation
,
strings
,
two pointers
1400
x13975
1696H
Maximum Product?
brute force
,
combinatorics
,
dp
,
greedy
,
implementation
,
math
,
two pointers
3500
x153
1693F
I Might Be Wrong
binary search
,
greedy
,
two pointers
3400
x275
1692G
2^Sort
data structures
,
dp
,
sortings
,
two pointers
1400
x16050
1692E
Binary Deque
binary search
,
implementation
,
two pointers
1200
x20075
1691D
Max GEQ Sum
binary search
,
constructive algorithms
,
data structures
,
divide and conquer
,
implementation
,
two pointers
1800
x5497
1691B
Shoe Shuffling
constructive algorithms
,
greedy
,
implementation
,
two pointers
1000
x21365
1690E
Price Maximization
binary search
,
greedy
,
math
,
two pointers
1500
x14566
1690D
Black and White Stripe
implementation
,
two pointers
1000
x26975
1689A
Lex String
brute force
,
greedy
,
implementation
,
sortings
,
two pointers
800
x16392
1684F
Diverse Segments
data structures
,
two pointers
2600
x842
1684E
MEX vs DIFF
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
2100
x3045
1682F
MCMF?
data structures
,
flows
,
graphs
,
greedy
,
sortings
,
two pointers
2700
x286
1680C
Binary String
binary search
,
greedy
,
strings
,
two pointers
1600
x9535
1676F
Longest Strike
data structures
,
greedy
,
implementation
,
sortings
,
two pointers
1300
x15894
1672D
Cyclic Rotation
constructive algorithms
,
greedy
,
implementation
,
two pointers
1700
x5995
1669F
Eating Candies
binary search
,
data structures
,
greedy
,
two pointers
1100
x23291
1665E
MinimizOR
bitmasks
,
brute force
,
data structures
,
divide and conquer
,
greedy
,
implementation
,
two pointers
2500
x1428
1660D
Maximum Product Strikes Back
brute force
,
implementation
,
math
,
two pointers
1600
x8186
1659D
Reverse Sort Sum
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
,
two pointers
1900
x3885
1656B
Subtract Operation
data structures
,
greedy
,
math
,
two pointers
1100
x17726
1646B
Quality vs Quantity
brute force
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
800
x20881
1641D
Two Arrays
bitmasks
,
brute force
,
combinatorics
,
greedy
,
hashing
,
math
,
two pointers
2700
x1050
1638F
Two Posters
brute force
,
data structures
,
greedy
,
two pointers
3200
x189
1632D
New Year Concert
binary search
,
data structures
,
greedy
,
math
,
number theory
,
two pointers
2000
x4478
1630C
Paint the Middle
dp
,
greedy
,
sortings
,
two pointers
2200
x2840
1630B
Range and Partition
binary search
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
1800
x5515
1628A
Meximum Array
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
,
two pointers
1400
x15228
1627E
Not Escaping
data structures
,
dp
,
implementation
,
shortest paths
,
two pointers
2200
x2246
1626C
Monsters And Spells
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
math
,
two pointers
1700
x10629
1622D
Shuffle
combinatorics
,
math
,
two pointers
2000
x3880
1619H
Permutation and Queries
brute force
,
data structures
,
divide and conquer
,
two pointers
2400
x1075
1611F
ATM and Students
binary search
,
data structures
,
two pointers
1800
x6217
1611E1
Escape The Maze (easy version)
dfs and similar
,
greedy
,
shortest paths
,
trees
,
two pointers
1700
x6965
1610B
Kalindrome Array
greedy
,
two pointers
1100
x14848
1609F
Interesting Sections
data structures
,
divide and conquer
,
meet-in-the-middle
,
two pointers
2800
x732
1609C
Complex Market Analysis
binary search
,
dp
,
implementation
,
number theory
,
schedules
,
two pointers
1400
x9509
1608C
Game Master
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
two pointers
1700
x6423
1607H
Banquet Preparations 2
greedy
,
sortings
,
two pointers
2200
x1197
1605E
Array Equalizer
binary search
,
greedy
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2400
x997
1601B
Frog Traveler
data structures
,
dfs and similar
,
dp
,
graphs
,
shortest paths
,
two pointers
1900
x4788
1600E
Array Game
games
,
greedy
,
two pointers
1900
x1931
1599A
Weights
constructive algorithms
,
greedy
,
two pointers
2600
x634
1598C
Delete Two Elements
data structures
,
dp
,
implementation
,
math
,
two pointers
1200
x20103
1592E
Bored Bakry
bitmasks
,
greedy
,
math
,
two pointers
2400
x1547
1588F
Jumping Through the Array
binary search
,
data structures
,
graphs
,
two pointers
3500
x269
1582F2
Korney Korneevich and XOR (hard version)
binary search
,
brute force
,
dp
,
greedy
,
two pointers
2400
x1713
1582C
Grandma Capa Knits a Scarf
brute force
,
data structures
,
greedy
,
strings
,
two pointers
1200
x14497
1572B
Xor of 3
brute force
,
constructive algorithms
,
greedy
,
two pointers
2500
x1748
1569D
Inconvenient Pairs
binary search
,
data structures
,
implementation
,
sortings
,
two pointers
1900
x4293
1566D2
Seating Arrangements (hard version)
data structures
,
greedy
,
implementation
,
sortings
,
two pointers
1600
x7704
1559D2
Mocha and Diana (Hard Version)
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
trees
,
two pointers
2500
x2537
1558B
Up the Strip
brute force
,
dp
,
math
,
number theory
,
two pointers
1900
x4616
1556G
Gates to Another World
bitmasks
,
data structures
,
dsu
,
two pointers
3300
x309
1555E
Boring Segments
data structures
,
sortings
,
trees
,
two pointers
2100
x3867
1553D
Backspace
dp
,
greedy
,
strings
,
two pointers
1500
x13359
1550E
Stringforces
binary search
,
bitmasks
,
brute force
,
dp
,
strings
,
two pointers
2500
x1441
1550D
Excellent Arrays
binary search
,
combinatorics
,
constructive algorithms
,
implementation
,
math
,
sortings
,
two pointers
2300
x1785
1548B
Integers Have Friends
binary search
,
data structures
,
divide and conquer
,
math
,
number theory
,
two pointers
1800
x9325
1547F
Array Stabilization (GCD version)
binary search
,
brute force
,
data structures
,
divide and conquer
,
number theory
,
two pointers
1900
x5518
1547E
Air Conditioners
data structures
,
dp
,
implementation
,
shortest paths
,
sortings
,
two pointers
1500
x13876
1547C
Pair Programming
greedy
,
two pointers
1100
x22051
1539D
PriceFixed
binary search
,
greedy
,
implementation
,
sortings
,
two pointers
1600
x11291
1538C
Number of Pairs
binary search
,
data structures
,
math
,
two pointers
1300
x27114
1537E2
Erase and Extend (Hard Version)
binary search
,
data structures
,
greedy
,
hashing
,
string suffix structures
,
strings
,
two pointers
2200
x4992
1537E1
Erase and Extend (Easy Version)
binary search
,
brute force
,
dp
,
greedy
,
hashing
,
implementation
,
string suffix structures
,
strings
,
two pointers
1600
x12300
1535C
Unstable String
binary search
,
dp
,
greedy
,
implementation
,
strings
,
two pointers
1400
x16117
1525E
Assimilation IV
combinatorics
,
dp
,
math
,
probabilities
,
two pointers
2100
x1970
1519D
Maximum Sum of Products
brute force
,
dp
,
implementation
,
math
,
two pointers
1600
x14618
1517E
Group Photo
binary search
,
data structures
,
implementation
,
two pointers
2500
x945
1516D
Cut
binary search
,
data structures
,
dp
,
graphs
,
number theory
,
two pointers
2100
x4103
1515D
Phoenix and Socks
greedy
,
sortings
,
two pointers
1500
x11166
1514E
Baby Ehab's Hyper Apartment
binary search
,
graphs
,
interactive
,
sortings
,
two pointers
2700
x587
1511G
Chips on a Board
bitmasks
,
brute force
,
data structures
,
dp
,
games
,
two pointers
2700
x701
1508A
Binary Literature
constructive algorithms
,
greedy
,
implementation
,
strings
,
two pointers
1900
x6022
1503D
Flip the Cards
2-sat
,
constructive algorithms
,
data structures
,
greedy
,
sortings
,
two pointers
2600
x968
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→ Pay attention
Before contest
Codeforces Round 946 (Div. 3)
20:18:21
Register now »
→ Filter Problems
Difficulty:
—
two pointers
combine-tags-by-or
*combine tags by OR
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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