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Problems
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Name
381A
Sereja and Dima
greedy
,
implementation
,
two pointers
800
x60733
279B
Books
binary search
,
brute force
,
implementation
,
two pointers
1400
x48112
489B
BerSU Ball
dfs and similar
,
dp
,
graph matchings
,
greedy
,
sortings
,
two pointers
1200
x46743
1791C
Prepend and Append
implementation
,
two pointers
800
x40876
1462A
Favorite Sequence
implementation
,
two pointers
800
x40105
1343C
Alternating Subsequence
dp
,
greedy
,
two pointers
1200
x36462
466C
Number of Ways
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x34678
1843A
Sasha and Array Coloring
greedy
,
sortings
,
two pointers
800
x33078
1873D
1D Eraser
greedy
,
implementation
,
two pointers
800
x32833
1840A
Cipher Shifer
implementation
,
strings
,
two pointers
800
x32703
1354B
Ternary String
binary search
,
dp
,
implementation
,
two pointers
1200
x29323
1851B
Parity Sort
greedy
,
sortings
,
two pointers
800
x28177
1843B
Long Long
greedy
,
math
,
two pointers
800
x28116
1399C
Boats Competition
brute force
,
greedy
,
two pointers
1200
x27829
600B
Queries about less or equal elements
binary search
,
data structures
,
sortings
,
two pointers
1300
x27563
1538C
Number of Pairs
binary search
,
data structures
,
math
,
two pointers
1300
x27121
1359B
New Theatre Square
brute force
,
dp
,
greedy
,
implementation
,
two pointers
1000
x27105
1690D
Black and White Stripe
implementation
,
two pointers
1000
x26994
1324D
Pair of Topics
binary search
,
data structures
,
sortings
,
two pointers
1400
x26846
1364A
XXXXX
brute force
,
data structures
,
number theory
,
two pointers
1200
x26843
580B
Kefa and Company
binary search
,
sortings
,
two pointers
1500
x25004
1840C
Ski Resort
combinatorics
,
math
,
two pointers
1000
x24788
978C
Letters
binary search
,
implementation
,
two pointers
1000
x24470
1744C
Traffic Light
binary search
,
implementation
,
two pointers
1000
x24408
1968B
Prefiquence
greedy
,
two pointers
800
x23485
1669F
Eating Candies
binary search
,
data structures
,
greedy
,
two pointers
1100
x23303
1760D
Challenging Valleys
implementation
,
two pointers
1000
x22480
1374D
Zero Remainder Array
math
,
sortings
,
two pointers
1400
x22282
1547C
Pair Programming
greedy
,
two pointers
1100
x22051
1133C
Balanced Team
sortings
,
two pointers
1200
x21401
1691B
Shoe Shuffling
constructive algorithms
,
greedy
,
implementation
,
two pointers
1000
x21379
1470A
Strange Birthday Party
binary search
,
dp
,
greedy
,
sortings
,
two pointers
1300
x21324
1646B
Quality vs Quantity
brute force
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
800
x20882
1006C
Three Parts of the Array
binary search
,
data structures
,
two pointers
1200
x20337
1598C
Delete Two Elements
data structures
,
dp
,
implementation
,
math
,
two pointers
1200
x20107
1921D
Very Different Array
data structures
,
greedy
,
sortings
,
two pointers
1100
x20086
1692E
Binary Deque
binary search
,
implementation
,
two pointers
1200
x20081
1832B
Maximum Sum
brute force
,
sortings
,
two pointers
1100
x19773
1366B
Shuffle
math
,
two pointers
1300
x19663
1352E
Special Elements
brute force
,
implementation
,
two pointers
1500
x19410
961B
Lecture Sleep
data structures
,
dp
,
implementation
,
two pointers
1200
x19316
1847B
Hamon Odyssey
bitmasks
,
greedy
,
two pointers
1000
x19154
1369C
RationalLee
greedy
,
math
,
sortings
,
two pointers
1400
x19084
1729D
Friends and the Restaurant
greedy
,
sortings
,
two pointers
1200
x18953
1251A
Broken Keyboard
brute force
,
strings
,
two pointers
1000
x18839
1364B
Most socially-distanced subsequence
greedy
,
two pointers
1300
x18501
1927D
Find the Different Ones!
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
two pointers
1300
x18463
1389C
Good String
brute force
,
dp
,
greedy
,
two pointers
1500
x18405
1899C
Yarik and Array
dp
,
greedy
,
two pointers
1100
x18289
1972A
Contest Proposal
brute force
,
greedy
,
two pointers
800
x18286
1793C
Dora and Search
constructive algorithms
,
data structures
,
two pointers
1200
x18254
676C
Vasya and String
binary search
,
dp
,
strings
,
two pointers
1500
x18191
1656B
Subtract Operation
data structures
,
greedy
,
math
,
two pointers
1100
x17732
1827A
Counting Orders
combinatorics
,
math
,
sortings
,
two pointers
1100
x17550
1741C
Minimize the Thickness
brute force
,
greedy
,
math
,
two pointers
1100
x17241
251A
Points on Line
binary search
,
combinatorics
,
two pointers
1300
x16797
1746B
Rebellion
constructive algorithms
,
greedy
,
two pointers
800
x16777
1689A
Lex String
brute force
,
greedy
,
implementation
,
sortings
,
two pointers
800
x16392
1535C
Unstable String
binary search
,
dp
,
greedy
,
implementation
,
strings
,
two pointers
1400
x16120
1692G
2^Sort
data structures
,
dp
,
sortings
,
two pointers
1400
x16064
1676F
Longest Strike
data structures
,
greedy
,
implementation
,
sortings
,
two pointers
1300
x15898
1701C
Schedule Management
binary search
,
greedy
,
implementation
,
two pointers
1400
x15829
1789B
Serval and Inversion Magic
brute force
,
implementation
,
strings
,
two pointers
800
x15817
1304C
Air Conditioner
dp
,
greedy
,
implementation
,
sortings
,
two pointers
1500
x15801
1257C
Dominated Subarray
greedy
,
implementation
,
sortings
,
strings
,
two pointers
1200
x15611
1492C
Maximum width
binary search
,
data structures
,
dp
,
greedy
,
two pointers
1500
x15610
1928B
Equalize
binary search
,
greedy
,
sortings
,
two pointers
1200
x15424
1628A
Meximum Array
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
,
two pointers
1400
x15230
1610B
Kalindrome Array
greedy
,
two pointers
1100
x14851
1419D2
Sage's Birthday (hard version)
binary search
,
brute force
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
1500
x14808
1237B
Balanced Tunnel
data structures
,
sortings
,
two pointers
1300
x14781
1519D
Maximum Sum of Products
brute force
,
dp
,
implementation
,
math
,
two pointers
1600
x14622
1690E
Price Maximization
binary search
,
greedy
,
math
,
two pointers
1500
x14574
1736C1
Good Subarrays (Easy Version)
binary search
,
data structures
,
schedules
,
two pointers
1300
x14555
1582C
Grandma Capa Knits a Scarf
brute force
,
data structures
,
greedy
,
strings
,
two pointers
1200
x14504
1697C
awoo's Favorite Problem
binary search
,
constructive algorithms
,
data structures
,
greedy
,
implementation
,
strings
,
two pointers
1400
x13978
1873F
Money Trees
binary search
,
greedy
,
math
,
two pointers
1300
x13949
1547E
Air Conditioners
data structures
,
dp
,
implementation
,
shortest paths
,
sortings
,
two pointers
1500
x13880
701C
They Are Everywhere
binary search
,
strings
,
two pointers
1500
x13846
1932C
LR-remainders
brute force
,
data structures
,
implementation
,
math
,
two pointers
1400
x13834
1896B
AB Flipping
greedy
,
strings
,
two pointers
900
x13471
1820B
JoJo's Incredible Adventures
math
,
strings
,
two pointers
1100
x13465
1553D
Backspace
dp
,
greedy
,
strings
,
two pointers
1500
x13361
1792C
Min Max Sort
binary search
,
brute force
,
greedy
,
math
,
two pointers
1500
x13316
702C
Cellular Network
binary search
,
implementation
,
two pointers
1500
x13239
1462E1
Close Tuples (easy version)
binary search
,
combinatorics
,
math
,
sortings
,
two pointers
1500
x13230
6C
Alice, Bob and Chocolate
greedy
,
two pointers
1200
x13054
1955D
Inaccurate Subsequence Search
data structures
,
two pointers
1400
x13007
427C
Checkposts
dfs and similar
,
graphs
,
two pointers
1700
x13002
1721C
Min-Max Array Transformation
binary search
,
greedy
,
two pointers
1400
x13001
1904B
Collecting Game
binary search
,
dp
,
greedy
,
sortings
,
two pointers
1100
x12977
1771B
Hossam and Friends
binary search
,
constructive algorithms
,
dp
,
two pointers
1400
x12932
1719C
Fighting Tournament
binary search
,
data structures
,
implementation
,
two pointers
1400
x12890
1381A2
Prefix Flip (Hard Version)
constructive algorithms
,
data structures
,
implementation
,
strings
,
two pointers
1700
x12771
86D
Powerful array
data structures
,
implementation
,
math
,
two pointers
2200
x12590
1794C
Scoring Subsequences
binary search
,
greedy
,
math
,
two pointers
1300
x12542
1927E
Klever Permutation
constructive algorithms
,
math
,
two pointers
1400
x12519
372A
Counting Kangaroos is Fun
binary search
,
greedy
,
sortings
,
two pointers
1600
x12397
1265B
Beautiful Numbers
data structures
,
implementation
,
math
,
two pointers
1300
x12305
1537E1
Erase and Extend (Easy Version)
binary search
,
brute force
,
dp
,
greedy
,
hashing
,
implementation
,
string suffix structures
,
strings
,
two pointers
1600
x12301
←
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Before contest
Codeforces Round 946 (Div. 3)
01:48:14
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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
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math
matrices
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number theory
probabilities
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shortest paths
sortings
string suffix structures
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