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P
itselfar
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C++, C
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SCHOOL (2)
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MEDIUM (124)
HARD (54)
- Linked List Group Reverse
- Binary Tree to DLL
- Subtraction in Linked List
- LRU Cache
- AVL Tree Insertion
- Merge Sort on Doubly Linked List
- Max Path Sum 2 Special Nodes
- Trapping Rain Water
- Smallest window containing all characters
- Histogram Max Rectangular Area
- Median of 2 Sorted Arrays of Different Sizes
- Search Pattern
- Wildcard string matching
- Sum-string
- Edit Distance
- Minimum sum partition
- Palindromic Partitioning
- Boolean Parenthesization
- Split Array Largest Sum
- Subset sums between the given range
- Largest rectangular sub-matrix whose sum is 0
- Geek in a Maze
- Vertex Cover
- Partition a set into two subsets such that the difference of subset sums is minimum (Set-2)
- Maximum Triple Product
- Maximum Connected group
- Minimum Cost to Merge Stones
- Minimize Max Distance to Gas Station
- LFU cache
- Count Reverse Pairs
- Candy
- Maximum XOR With an Element From Array
- Chocolates Pickup
- Better String
- Count Lucky Permutations
- Select Nodes
- Fixing Two swapped nodes of a BST
- Shortest Path Using Atmost One Curved Edge
- Avoid Explosion
- Walls Coloring II
- Redundant Parenthesis
- Partition the Array
- Count Binary Strings With No Consecutive 1s
- Divide in Incremental Groups
- Max min Height
- Maximum Number of coins
- Median of the Subarrays
- Minimum BST Sum Subtree
- Special Digits
- Cake Distribution Problem
- Min Time
- Game Of Subsets
- Geekina Hate 1s
- Making A Large Island
- Rotate a Linked List
- Add Number Linked Lists
- Add 1 to a Linked List Number
- Detect Loop in linked list
- Check for BST
- Quick Sort
- Bottom View of Binary Tree
- Delete without head pointer
- Intersection in Y Shaped Lists
- Diameter of a Binary Tree
- Sum Tree
- Tree Boundary Traversal
- Directed Graph Cycle
- Undirected Graph Cycle
- LCA in Binary Tree
- The Celebrity Problem
- Largest subarray with 0 sum
- Topological sort
- Vertical Tree Traversal
- Find the number of islands
- Get Min from Stack
- Validate an IP Address
- Remove loop in Linked List
- Multiply two strings
- Implement Atoi
- Palindrome Linked List
- Rat in a Maze
- BST with Dead End
- Find triplets with zero sum
- Top View of Binary Tree
- Peak element
- Euler circuit and Path
- Reverse array in groups
- Smallest Positive Missing
- Power Of Numbers
- Wave Array
- Rearrange Array Alternately
- Maximum Index
- Stock buy and sell
- Rotate Array
- Kadane's Algorithm
- Majority Element
- Binary Array Sorting
- Count Inversions
- Union of 2 Sorted Arrays
- Indexes of Subarray Sum
- Triplet Sum in Array
- Merge Without Extra Space
- Spirally traversing a matrix
- Determinant of a Matrix
- Subarray with 0 sum
- Longest Consecutive Subsequence
- Stock span problem
- Next Greater Element
- K Sized Subarray Maximum
- Find median in a stream
- Fractional Knapsack
- Job Sequencing Problem
- Minimum Platforms
- Minimum Jumps
- Detect Cycle using DSU
- Stickler Thief
- Ways to Reach the n'th Stair
- Longest Increasing Subsequence
- Longest Common Subsequence
- 0 - 1 Knapsack Problem
- Allocate Minimum Pages
- Kth Smallest
- Maximize The Cut Segments
- Stock Buy and Sell – Multiple Transaction Allowed
- 4 Sum - All Quadruples
- Sort 0s, 1s and 2s
- Maximum Index
- Number of subarrays with maximum values in given range
- Top k numbers in a stream
- Consecutive 1's not allowed
- Single Among Doubles
- Pythagorean Triplet
- Painting the Fence
- Search in Rotated Sorted Array
- Maximum Product Subarray
- Longest subarray with sum divisible by K
- Check if a string is repetition of its substring of k-length
- Row with max 1s
- Longest Subarray with Sum K
- Max Sum without Adjacents
- Shuffle integers
- Longest Common Substring
- Longest Palindrome in a String
- K-th element of two Arrays
- Largest Sum Subarray of Size at least K
- Minimize the Heights II
- First and Last Occurrences
- Permutations of a String
- Game of XOR
- Modified Game of Nim
- Max Sum Increasing Subsequence
- Coin Change (Count Ways)
- Gold Mine Problem
- Coin Change (Minimum Coins)
- Perfect Sum Problem
- nCr
- Partition Equal Subset Sum
- Count possible ways to construct buildings
- Smith Number
- How Many X's?
- Exit Point in a Matrix
- Stream First Non-repeating
- Techfest and the Queue
- Recursively Remove Adjacent Duplicates
- Subset Sum Problem
- Remove K Digits
- Find duplicate rows in a binary matrix
- Anti Diagonal Traversal of Matrix
- Remove and Reverse
- Even Swap
- Maximum Meetings in One Room
- Buy Maximum Stocks
- Count Special Numbers
- Distinct Difference
- Unequal Arrays
- Smaller Sum
- Nearest smaller tower
- Minimize the Difference
- Reverse a linked list
- Compare two linked lists
- Remove duplicates from an unsorted linked list
- Balanced Tree Check
- Kth from End of Linked List
- Middle of a Linked List
- Left View of Binary Tree
- Find Transition Point
- BFS of graph
- Binary Search
- Third largest element
- Count Occurrence of digit k
- Minimum distance in an Array
- Array Duplicates
- Play with an array
- More than n/k Occurrences
- Reverse Using Stack
- Symmetric Tree
- Reverse first K of a Queue
- Magical Number
- Find Sum Pairs Across Two BSTs
- Product of an Array
- Rightmost different bit
- Power of 2
- Frequencies in a Limited Array
- Equilibrium Point
- Array Leaders
- Transpose of Matrix
- Check if a string is Isogram or not
- Anagram
- Winner of an election
- Most Frequent Character
- Reverse Words
- Sum of numbers in string
- Parenthesis Checker
- First Repeating Element
- Union of Arrays with Duplicates
- Check Equal Arrays
- Missing in Array
- Max Value Permutation
- Missing And Repeating
- Find Index
- Finding-Pairs
- Common in 3 Sorted Arrays
- String Duplicates Removal
- Missing number
- Fascinating Number
- Remove Duplicates
- Compete the skills
- Second Largest
- Two Sum - Pair with Given Sum
- Rotate Bits
- Number of occurrence
- Find the left over element
- String's Count
- Longest Common Prefix of Strings
- First Repeated Character
- Two sum -Pairs with 0 Sum
- At Least K Occurrences
- Maximum sum of subarray less than or equal to x
- Palindrome String
- Max Sum Subarray of size K
- Nth Fibonacci Number
- Shortest path from 1 to n
- Reach the Nth point
- Row with Minimum 1s
- Inorder Traversal and BST
- Sum of dependencies in a graph
- Smallest window containing 0, 1 and 2
- Maximum Identical Bowls
- Bus Conductor
- Seating Arrangement
- Two Swaps
- Find Length of Linked List
- Check for Binary String
- Replace all 0's with 5
- Largest product
- Palindromic Array
- Linked List Insertion At End
- Anagram of String
- Identical Linked Lists
- Alternates in an Array
- Sum Array Puzzle
- Array Search
- Binary String
- Remove common characters and concatenate
- Reverse a String
- Minimum Product of k Integers
- Palindrome Array
- Rearranging array
- Mega Sale
- Sandwiched_Vowels
- Sum of Array
- Sum of Natural Numbers
- Searching in an Array
- Count pair sum
- Print Elements of Array
- Remove consonants from a string
- Friendly Array
- Balanced Array
- At least two greater elements
- Check Arithmetic Progression
- Type of array
- Sort a String
- Check if divisible by 11
- Check if divisible by 4
- Change the string
- Remove all characters other than alphabets
- Value equal to index value
- Check String
- Convert a list of characters into a String
- Remove characters from alphanumeric string
- Count of camel case characters
- Maximum triplet sum in array
- Count the characters in each word in a given sentence
- Count the characters
- Count type of Characters
- Uncommon characters
- Swap kth elements
- Rock Paper Scissors!
- Extract the integers
- Fake Profile
- Lower case to upper case
- Smaller and Larger
- String Reversal
- Remove Spaces
- Repeated Character
- Reverse a string with spaces intact
- Length of Last word
- Display longest name
- Find element at a given Index
- Upper Case Conversion
- Sort the string in descending order
- Merge two strings
- Largest Element in Array
- Rotate Array by One
- Game with nos
- Split Strings
- Array Subset
- Product is even or odd?
- Count of smaller elements
- Min and Max in Array
- Pattern of Strings
- Extract Maximum
- Print first letter of every word in the string
- Remove character
- Red OR Green
- Convert String to LowerCase
- Delete alternate characters
- Reverse a String
- Java Strings | Set 1
- Java Substring
- Sort first half in ascending and second half in descending
- Factorial