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Alternating Characters
patterns
strings
Anagram
sort
strings
Append and Delete
string
math
Balanced Brackets
stack
Beautiful Binary String
string
Beautiful Pairs
frequency table
sort
Beautiful Triplets
binary search
frequency table
manifold
Big Sorting
sort
Bigger is Greater
sort
string
Birthday Chocolate
prefix sum
patterns
Bot Saves Princess
CamelCase
patterns
Candies
greedy
Cavity Map
ad hoc
Circular Array Rotation
math
Climbing the Leaderboard
binary search
sorted sequence
Closest Numbers
pattern
sort
Compare the Triplets
patterns
Counting Valleys
patterns
Cut the sticks
sort
frequency table
Cycle Detection
Day of the Programmer
design
ad-hoc
Designer Pdf Viewer
Distracted Shopkeeper
Electronics Shop
2 pointers
sorting
Equal Stacks
prefix sum
Evaluate Expression
design
stack
Exam Plan
sort
prefix sum
priority queue
Fair Rations
math
ad hoc
Find Kth Zero
binary search
Find Maximum Index Product
stack
Find the Maximum Difference
Find the Missing Value
manifold
Fixed Adjacent Values
ad hoc
Flatland Space Stations
prefix sum
Frequency Queries
hashtable
frequency-table
Game of Thrones
frequency table
Gap Up and Down
patterns
Gemstones
hashtable
frequency table
Greedy Florist
Happy Ladybugs
strings
frequency table
Herb and Bjarne
Hotel Coverage
sort
ad hoc
greedy
Impress the Interviewer
binary search
constrained
Jesse and Cookies
priority queue
Jim and the Orders
patterns
sort
Left Rotation
Making Anagrams
string
frequency table
Mark and Toys
sort
Mars Exploration
patterns
Max Min
patterns
sort
functional
Maximum Perimeter Triangle
greedy
math
Mini-Max Sum
Minimum Absolute Difference in an Array
patterns
sort
functional
Minimum Distances
hashtable
Minimum Index Distance
ad hoc
Minimum Loss
binary search
patterns
sort
Most Distant
math
New Year Chaos
ad hoc
sorted sequence
constrained
Number of Subordinates
binary search
sort
prefix sum
Odd or Even Sum
prefix sum
One Swap
patterns
ad-hoc
Pairs
sorting
Palindrome Index
Permuting Two Arrays
Picking Numbers
sort
frequency table
prefix sum
Product of Array Except Self
math
constrained
prefix sum
Queue Using Two Stacks
constrained
stack
Repeated String
string
Restaurant
math
Roman Number
binary search
Sherlock and Array
Sherlock and Pairs
frequency table
Sherlock and Squares
Sherlock and the Valid String
frequency table
Simple Text Editor
stack
Simplify Path
stack
Smallest Rearrangement Spell
Squares of a Sorted Array
2 pointers
sort
constrained
Staircase
Stock Maximize
prefix sum
patterns
String Construction
sort
frequency-table
Strong Password
manifold
bitset
design
Student Sections
binary search
prefix sum
manifold
Super Reduced String
strings
The Absent Students
sort
manifold
The Crazy Broker
prefix sum
preprocessing
binary search
The Love-Letter Mystery
patterns
The Lucky Employee
frequency table
prefix sum
hashtable
The Master of Cryptocurrencies
patterns
The maximum subarray
dynamic programming
prefix sum
The Most Frequent
frequency table
hashtable
The Next Greater Element
stack
The Salesman in a Rush
math
Triple Sum
sorting
binary search
Weighted Uniform String
sort
binary search