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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
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Name
577B
Modulo Sum
combinatorics
,
data structures
,
dp
,
two pointers
1900
x11476
1884B
Haunted House
binary search
,
greedy
,
math
,
two pointers
1100
x11670
1251C
Minimize The Integer
greedy
,
two pointers
1600
x11687
1416A
k-Amazing Numbers
binary search
,
data structures
,
implementation
,
two pointers
1500
x11739
716B
Complete the Word
greedy
,
two pointers
1300
x11813
165C
Another Problem on Strings
binary search
,
brute force
,
dp
,
math
,
strings
,
two pointers
1600
x11878
387B
George and Round
brute force
,
greedy
,
two pointers
1200
x11915
1007A
Reorder the Array
combinatorics
,
data structures
,
math
,
sortings
,
two pointers
1300
x11986
1333C
Eugene and an array
binary search
,
data structures
,
implementation
,
two pointers
1700
x12178
1343D
Constant Palindrome Sum
brute force
,
data structures
,
greedy
,
two pointers
1700
x12204
446A
DZY Loves Sequences
dp
,
implementation
,
two pointers
1600
x12238
1537E1
Erase and Extend (Easy Version)
binary search
,
brute force
,
dp
,
greedy
,
hashing
,
implementation
,
string suffix structures
,
strings
,
two pointers
1600
x12264
1265B
Beautiful Numbers
data structures
,
implementation
,
math
,
two pointers
1300
x12300
372A
Counting Kangaroos is Fun
binary search
,
greedy
,
sortings
,
two pointers
1600
x12369
1927E
Klever Permutation
constructive algorithms
,
math
,
two pointers
1400
x12398
1794C
Scoring Subsequences
binary search
,
greedy
,
math
,
two pointers
1300
x12464
86D
Powerful array
data structures
,
implementation
,
math
,
two pointers
2200
x12535
1955D
Inaccurate Subsequence Search
data structures
,
two pointers
1400
x12712
1381A2
Prefix Flip (Hard Version)
constructive algorithms
,
data structures
,
implementation
,
strings
,
two pointers
1700
x12755
1904B
Collecting Game
binary search
,
dp
,
greedy
,
sortings
,
two pointers
1100
x12830
1771B
Hossam and Friends
binary search
,
constructive algorithms
,
dp
,
two pointers
1400
x12846
1719C
Fighting Tournament
binary search
,
data structures
,
implementation
,
two pointers
1400
x12864
427C
Checkposts
dfs and similar
,
graphs
,
two pointers
1700
x12960
1721C
Min-Max Array Transformation
binary search
,
greedy
,
two pointers
1400
x12972
6C
Alice, Bob and Chocolate
greedy
,
two pointers
1200
x13012
702C
Cellular Network
binary search
,
implementation
,
two pointers
1500
x13156
1462E1
Close Tuples (easy version)
binary search
,
combinatorics
,
math
,
sortings
,
two pointers
1500
x13195
1792C
Min Max Sort
binary search
,
brute force
,
greedy
,
math
,
two pointers
1500
x13225
1553D
Backspace
dp
,
greedy
,
strings
,
two pointers
1500
x13341
1896B
AB Flipping
greedy
,
strings
,
two pointers
900
x13374
1820B
JoJo's Incredible Adventures
math
,
strings
,
two pointers
1100
x13394
1932C
LR-remainders
brute force
,
data structures
,
implementation
,
math
,
two pointers
1400
x13661
701C
They Are Everywhere
binary search
,
strings
,
two pointers
1500
x13770
1873F
Money Trees
binary search
,
greedy
,
math
,
two pointers
1300
x13847
1547E
Air Conditioners
data structures
,
dp
,
implementation
,
shortest paths
,
sortings
,
two pointers
1500
x13851
1697C
awoo's Favorite Problem
binary search
,
constructive algorithms
,
data structures
,
greedy
,
implementation
,
strings
,
two pointers
1400
x13940
1582C
Grandma Capa Knits a Scarf
brute force
,
data structures
,
greedy
,
strings
,
two pointers
1200
x14410
1690E
Price Maximization
binary search
,
greedy
,
math
,
two pointers
1500
x14508
1736C1
Good Subarrays (Easy Version)
binary search
,
data structures
,
schedules
,
two pointers
1300
x14519
1519D
Maximum Sum of Products
brute force
,
dp
,
implementation
,
math
,
two pointers
1600
x14592
1237B
Balanced Tunnel
data structures
,
sortings
,
two pointers
1300
x14731
1419D2
Sage's Birthday (hard version)
binary search
,
brute force
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
1500
x14748
1610B
Kalindrome Array
greedy
,
two pointers
1100
x14791
1628A
Meximum Array
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
,
two pointers
1400
x15206
1928B
Equalize
binary search
,
greedy
,
sortings
,
two pointers
1200
x15260
1972A
Contest Proposal
brute force
,
greedy
,
two pointers
800
x15421
1492C
Maximum width
binary search
,
data structures
,
dp
,
greedy
,
two pointers
1500
x15577
1257C
Dominated Subarray
greedy
,
implementation
,
sortings
,
strings
,
two pointers
1200
x15597
1701C
Schedule Management
binary search
,
greedy
,
implementation
,
two pointers
1400
x15763
1304C
Air Conditioner
dp
,
greedy
,
implementation
,
sortings
,
two pointers
1500
x15772
1789B
Serval and Inversion Magic
brute force
,
implementation
,
strings
,
two pointers
800
x15791
1676F
Longest Strike
data structures
,
greedy
,
implementation
,
sortings
,
two pointers
1300
x15853
1692G
2^Sort
data structures
,
dp
,
sortings
,
two pointers
1400
x15948
1535C
Unstable String
binary search
,
dp
,
greedy
,
implementation
,
strings
,
two pointers
1400
x16093
1689A
Lex String
brute force
,
greedy
,
implementation
,
sortings
,
two pointers
800
x16380
251A
Points on Line
binary search
,
combinatorics
,
two pointers
1300
x16598
1746B
Rebellion
constructive algorithms
,
greedy
,
two pointers
800
x16754
1741C
Minimize the Thickness
brute force
,
greedy
,
math
,
two pointers
1100
x17203
1827A
Counting Orders
combinatorics
,
math
,
sortings
,
two pointers
1100
x17481
1656B
Subtract Operation
data structures
,
greedy
,
math
,
two pointers
1100
x17663
1899C
Yarik and Array
dp
,
greedy
,
two pointers
1100
x18131
676C
Vasya and String
binary search
,
dp
,
strings
,
two pointers
1500
x18136
1793C
Dora and Search
constructive algorithms
,
data structures
,
two pointers
1200
x18137
1927D
Find the Different Ones!
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
two pointers
1300
x18253
1389C
Good String
brute force
,
dp
,
greedy
,
two pointers
1500
x18375
1364B
Most socially-distanced subsequence
greedy
,
two pointers
1300
x18444
1251A
Broken Keyboard
brute force
,
strings
,
two pointers
1000
x18817
1729D
Friends and the Restaurant
greedy
,
sortings
,
two pointers
1200
x18848
1369C
RationalLee
greedy
,
math
,
sortings
,
two pointers
1400
x19059
1847B
Hamon Odyssey
bitmasks
,
greedy
,
two pointers
1000
x19097
961B
Lecture Sleep
data structures
,
dp
,
implementation
,
two pointers
1200
x19251
1352E
Special Elements
brute force
,
implementation
,
two pointers
1500
x19346
1366B
Shuffle
math
,
two pointers
1300
x19601
1832B
Maximum Sum
brute force
,
sortings
,
two pointers
1100
x19647
1692E
Binary Deque
binary search
,
implementation
,
two pointers
1200
x19965
1921D
Very Different Array
data structures
,
greedy
,
sortings
,
two pointers
1100
x19969
1598C
Delete Two Elements
data structures
,
dp
,
implementation
,
math
,
two pointers
1200
x20045
1006C
Three Parts of the Array
binary search
,
data structures
,
two pointers
1200
x20284
1646B
Quality vs Quantity
brute force
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
800
x20868
1470A
Strange Birthday Party
binary search
,
dp
,
greedy
,
sortings
,
two pointers
1300
x21255
1691B
Shoe Shuffling
constructive algorithms
,
greedy
,
implementation
,
two pointers
1000
x21275
1133C
Balanced Team
sortings
,
two pointers
1200
x21322
1968B
Prefiquence
greedy
,
two pointers
800
x21486
1547C
Pair Programming
greedy
,
two pointers
1100
x22029
1374D
Zero Remainder Array
math
,
sortings
,
two pointers
1400
x22214
1760D
Challenging Valleys
implementation
,
two pointers
1000
x22397
1669F
Eating Candies
binary search
,
data structures
,
greedy
,
two pointers
1100
x23105
1744C
Traffic Light
binary search
,
implementation
,
two pointers
1000
x24261
978C
Letters
binary search
,
implementation
,
two pointers
1000
x24391
1840C
Ski Resort
combinatorics
,
math
,
two pointers
1000
x24625
580B
Kefa and Company
binary search
,
sortings
,
two pointers
1500
x24946
1324D
Pair of Topics
binary search
,
data structures
,
sortings
,
two pointers
1400
x26766
1364A
XXXXX
brute force
,
data structures
,
number theory
,
two pointers
1200
x26796
1690D
Black and White Stripe
implementation
,
two pointers
1000
x26826
1538C
Number of Pairs
binary search
,
data structures
,
math
,
two pointers
1300
x27017
1359B
New Theatre Square
brute force
,
dp
,
greedy
,
implementation
,
two pointers
1000
x27072
600B
Queries about less or equal elements
binary search
,
data structures
,
sortings
,
two pointers
1300
x27477
1399C
Boats Competition
brute force
,
greedy
,
two pointers
1200
x27774
1843B
Long Long
greedy
,
math
,
two pointers
800
x28043
1851B
Parity Sort
greedy
,
sortings
,
two pointers
800
x28079
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