- Reverse an Array
- Maximum and Minimum Of Array Elements
- Sum Of Digits
- Factorial
- Sum of Array
- Leap Year
- Palindrome String
- Armstrong Numbers
- LCM And GCD
- Sum of Series
- Series AP
- Binary number to decimal number
- Automorphic Number
- Rearrange Array Alternately
- Pattern Printing
- Remove Spaces
- Value equal to index value
- Swap kth elements
- Number of occurrence
- Binary representation
- Find difference between sum of diagonals
- Reversing the vowels
- Convert time from 12 hour to 24 hour format
- Java Hello World
- Java if-else (Decision Making)
- Java Switch Case statement
- Java loops | Set 1
- Java Arrays | Set 1
- Java Strings | Set 1
- Count of smaller elements
- Find Index
- Remove vowels from string
- Upper case conversion
- Program to print reciprocal of letters - copy
- Java Input/Output
- Java Reverse a String
- Java Delete alternate characters
- Java Substring
- C++ 2-D Arrays | Set-1
- Java Basic Data Types
- Java Operators(Relational) | Set - 2

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Overall Coding Score: 2037

Monthly Coding Score: 335

Weekly Coding Score: 35

- Binary String
- Consecutive elements
- GCD of Array
- Repetitive Addition Of Digits
- Searching a number
- Power of 2
- Series GP
- Sort The Array
- Pythagorean Triplet
- Nth Fibonacci Number
- Sort a String
- Print the Kth Digit
- Sieve of Eratosthenes
- Shortest path from 1 to n
- Amend The Sentence
- Rotate Array
- Permutations of a given string
- Check if the number is Fibonacci
- Missing number in array
- Rock Paper Scissors!
- Array of alternate +ve and -ve no.s
- Maximum product of two numbers
- Number of paths
- Segregate Even and Odd numbers
- Find number of days between two given dates
- Count total set bits
- Bit Difference
- Count numbers containing 4
- Greater on right side
- Immediate Smaller Element
- Perfect Squares in a Range
- Sum of distinct elements
- Intersection of two arrays
- Union of two arrays
- Convert array into Zig-Zag fashion
- Remove character
- Maximum repeating number
- k largest elements
- Student record
- Minimum difference pair
- Find position of set bit
- Maximum money
- Ways To Tile A Floor
- Middle of Three
- Generate Binary Numbers
- Count the numbers
- Find the Odd Occurence
- Angle between hour and minute hand
- Keypad typing
- Rotating an Array
- Total count
- Surpasser Count
- Matching Pair
- Merge and Sort
- Rotate by 90 degree
- Reverse array in groups
- The AND Gate
- The OR Gate
- 1's Complement
- Set Bits
- Longest Consecutive 1's
- Padovan Sequence
- Juggler Sequence
- Minimize the sum of product
- Make a Distinct Digit Array
- Chocolate Distribution Problem
- String Reversal
- Reverse each word in a given string
- Check if a number can be expressed as x^y
- Encrypt the string - 1
- Replace the Bit
- Sum of product of x and y with floor(n/x) = y
- Find first and last occurrence of x
- Type of array
- Sum of dependencies in a graph
- Sort in specific order
- Check if two arrays are equal or not
- Form largest number from digits
- Check if string is rotated by two places
- Unique Numbers
- XOR of all elements
- Sum of all substrings of a number
- Find first set bit
- Minimize sum of alternate product
- Geek and Coffee Shop
- Wrong Ball
- Magical String[Duplicate Problem]
- Index of first 1 in a sorted array of 0’s and 1’s
- Does array represent Heap
- Find the element that appears once in sorted array
- Last index of One
- Arranging the array
- Transpose of Matrix
- First element to occur k times
- Check whether K-th bit is set or not
- Extract Maximum
- Java Operators(Arithmetic) | Set 1
- Uncommon characters
- Sum of numbers in string
- Find the smallest and second smallest element in an array
- Find minimum and maximum element in an array
- Find second largest element
- URLify a given string
- Sorted matrix
- Sum Terms Nth Row
- Pair array product sum
- Count pair sum
- Swap and Maximize
- Check if a string is Isogram or not
- Alternative Sorting
- Rightmost different bit
- Check set bits
- Set kth bit
- Quick Left Rotation
- Toggle bits given range
- Twice counter
- Longest Common Prefix in an Array
- Elements in the Range
- Print first n Fibonacci Numbers
- Remove repeated digits in a given number
- Count triplets with sum smaller than X
- Check perfect square
- Odd to Even
- Total number of Strings
- Row with minimum number of 1's
- Minimum Distinct Ids
- Find the Highest number
- Twisted Prime Number
- Minimum number to form the sum even
- Pronic Number
- Transform to prime
- First and last occurrences of X
- Positive and negative elements
- Boolean String Value
- Part Sort
- Difference between sums of odd and even digits
- Mind Game
- The Counting Game !!
- Absolute Difference of 1
- Numbers with 0 as a digit
- Remove common characters and concatenate
- Repeated I.Ds
- ZERO Number
- Sum of upper and lower triangles
- Left Rotate Matrix K times
- Sum of Digit Modified
- Count the characters
- Find k-th character in string
- Repeated Character
- Merge two strings
- Sort String
- Difference between highest and lowest occurrence
- Minimum product pair
- Find unique element
- An Easy problem
- G.F Series
- Find the fine
- Three distinct factors
- Minimum Product of k Integers
- Maximize ∑arr[i]*i of an Array
- Find the closest number
- Last index of a character in the string
- Special Series Sum
- Special Odd Series Sum
- Maximum triplet sum in array
- Print K smallest elements in their original order
- Check whether two numbers differ at one bit position only
- Squares Difference
- Check if the number is balanced
- Find sum of even factors of a number
- Remove consonants from a string
- C++ Corresponding position in the two strings that hold exactly the same characters.
- Most frequent word in an array of strings
- Check if strings are rotations of each other or not
- Crazy String
- Message Spreading
- Last duplicate element in a sorted array
- Sum of f(a[i], a[j]) over all pairs in an array of n integers
- Pattern-1
- Cricket Average
- Midori and chocolates
- Program for length of the longest word in a sentence
- The Modulo Task
- The Penalty Shootout
- Part of it.
- The Number System
- Difference series
- Multiply left and right array sum.
- Find the Number which contain the digit d
- Gray to Binary equivalent
- Maximum Perimeter of Triangle from array
- Doctors Clinic
- How Many X's?
- Prime String
- Height of Heap
- Fibonacci to N
- Average Count Array
- Java Anagram Strings
- Java Date and Day
- Java Collection | Set 1 (ArrayList) Part-1
- Java Collection | Set 3 (HashMap) Part-1
- Java 1-d and 2-d Array
- Java Iterator
- C++ 2-D Arrays | Set-2
- Tower of Hanoi
- Print Linked List elements
- Count nodes of linked list
- Node at a given index in linked list
- Delete node in Doubly Linked List
- Size of Binary Tree
- Inorder Traversal
- Bubble Sort
- Count Leaves in Binary Tree
- Selection Sort
- Height of Binary Tree
- Finding middle element in a linked list
- Circular Linked List
- Postorder Traversal
- Implement Stack using Linked List
- Implement stack using array
- Implement Queue using Linked List
- Implement Queue using array
- Square root
- Insert a node in Doubly linked list
- Binary Search
- Remove duplicate elements from sorted Array
- Print all possible strings
- Replace all 0's with 5
- Count zeros in a sorted matrix
- Convert to Roman No
- Preorder Traversal
- Implement strstr
- C++ STL | Set 1 (vector)
- C++ STL | Set 3 (map)
- C++ STL | Set 4 (stack)
- C++ STL | Set 5 (queue)
- C++ STL | Set 6 (set)
- Search a node in BST
- C++ STL | Set 7 (unordered map)
- C++ STL | Set 8 (unordered set)
- Remainder with 7
- Java Collection | Set 4 (TreeMap)
- Implement Atoi
- Find Number of Numbers
- Find triplets with zero sum
- Linked List Insertion
- Minimum element in BST
- Anagram of String
- Circular Linked List Traversal
- Linked List Length Even or Odd?
- Delete Alternate Nodes
- Identical Linked Lists
- Find the Sum of Last N nodes of the Linked List
- Modular Node
- Find n/k th node in Linked list
- Maximum in Struct Array
- Queue Reversal
- Sum of Binary Tree
- Insert in Middle of Linked List
- longest substring containing '1'
- Pairwise Consecutive Elements
- Count Non-Leaf Nodes in Tree
- C++ STL List
- C++ STL Deque
- C++ Classes Introduction
- Product of array elements
- C++ Call by reference
- Start Coding
- logical Operators
- Area of Cuboid - Java
- Sort and Reverse Vector
- Front to Back
- Stack and Queue Operations
- common Elements - Java
- Stack designer
- Banish the Commons
- Queue Designer
- Sum the common elements
- Parties and seats
- Set Operations
- Map Operations

- Frequency of Array Elements
- Anagram
- Maximum Gap
- Pattern Searching
- Rotation
- Search in a Rotated Array
- Parenthesis Checker
- Palindrome numbers
- Merge Two Sorted Arrays
- Maximize Toys
- Trailing zeroes in factorial
- Non Repeating Character
- Sum of Middle Elements of two sorted arrays
- Good Pairs
- Count Occurences of Anagrams
- Reverse words in a given string
- Isomorphic Strings
- Count Substrings
- Move all zeroes to end of array
- Remove all duplicates from a given string
- Remove “b” and “ac” from a given string
- Majority Element
- Equal Sum and Product
- Spirally traversing a matrix
- Sort an array of 0s, 1s and 2s
- Pairs with difference k
- Subset Sum Problem
- Two numbers with sum closest to zero
- Finding Number
- Maximum value in a bitonic array
- Next greater number set digits
- Finding Position
- Amount of Water
- Single Number
- Segregate even and odd nodes in a Linked List
- Does robot moves circular
- Count increasing Subarrays
- Element that appears once where every element occurs twice
- Longest Distinct characters in string
- Count distinct pairs with difference k
- Replace by X
- Maximum Product Subarray
- N meetings in one room
- Maximum of all subarrays of size k
- Remove Duplicates
- Kth distance
- Addition of submatrix
- Maximum sum increasing subsequence
- Array to BST
- Max Sum without Adjacents
- Key Pair
- Inversion of array
- Maximum Difference
- Product array puzzle
- Multiply two polynomals
- Reverse Bits
- Count Smaller elements
- Lucky Number
- Reach the Nth point
- Subarray with given sum
- Count numbers
- Leaders in an array
- Swap all odd and even bits
- Count number of hops
- Equal to product
- Count pairs with given sum
- Inorder Traversal and BST
- Segregate 0s and 1s
- Triplet Sum in Array
- Three Great Candidates
- Reach a given score
- Rectangles in a Circle
- Overlapping rectangles
- Possible paths
- Number of pairs
- Minimum element in a sorted and rotated array
- Search in a matrix
- Day of the week
- Count the Zeros
- 0 - 1 Knapsack Problem
- Find the number of sub-arrays having even sum
- Valid Substring
- Count the Reversals
- Number of ways to find two numbers
- Game of Death in a circle
- Next larger element
- Ordering of strings
- Permutation with Spaces
- Element appearing once
- Equilibrium point
- Floor in a Sorted Array
- Max value
- Minimum Energy
- Least Prime Factor
- Number Game
- Time Difference
- Equal 0, 1 and 2
- Adding Ones
- Pairs with specific difference
- Equal Point in Sorted Array
- Largest Even Number
- Count Pairs in an Array
- Sum of elements between k1'th and k2'th smallest elements
- Min sum formed by digits
- Move all negative elements to end
- String Manipulation
- Recursively remove all adjacent duplicates
- Maximum Sum Bitonic Subsequence
- 1[0]1 Pattern Count
- Sum of k smallest elements in BST
- Flood fill Algorithm
- Tom and String
- Decode the pattern
- Longest K unique characters substring
- Roman Number to Integer
- Maximum no of 1's row
- Max sum in sub-arrays
- Smallest subarray with sum greater than x
- Rahul a Geek
- Love For The Twins
- Minimum Operations
- Equal point in a string of brackets
- Find all pairs with a given sum
- Meta Strings
- Numbers with same first and last digit
- Check if palindromic ignoring spaces
- Excel Sheet | Part - 2
- Zero Sum Subarrays
- Largest Fibonacci Subsequence
- Increasing Sub Sequence
- Longest Palindromic Subsequence
- K-th element of two sorted Arrays
- Evaluation of Postfix Expression
- Maximum difference Indexes
- Common elements
- Recursive sequence
- Print an array in Pendulum Arrangement
- Fill array with 1's
- Infix to Postfix
- Efficiently sorting numbers in range from 0 to n^2 - 1
- Element with left side smaller and right side greater
- Transitive closure of a Graph
- Array Subset of another array
- Smallest Positive missing number
- First negative integer in every window of size k
- Length of longest subarray
- Sum of product of all pairs
- Game with String
- Four Elements
- Paths to reach origin
- Subarray with 0 sum
- Nth catalan number
- Subarray range with given sum
- Group Anagrams Together
- Sum equals to Sum
- Find Pair Given Difference
- Count the elements
- Second most repeated string in a sequence
- Count all possible paths from top left to bottom right
- Minimum Deletions
- Greedy Fox
- Rearrange a string
- Minimum Number in a sorted rotated array
- Sum of length
- Sort by Absolute Difference
- Number of Groups
- Primes sum
- Swapping pairs make sum equal
- Number and the Digit Sum
- Toppers Of Class
- String Ignorance
- Nth item through sum
- Maximum sum Problem
- Minimum indexed character
- Consecutive Array Elements
- Stickler Thief
- Even and odd elements at even and odd positions
- Find the most frequent digit
- Compute (a*b)%c
- Merging two unsorted arrays in sorted order
- Transform the array
- Even Fibonacci Numbers Sum
- Sum of Lengths of Non-Overlapping SubArrays
- Kth LSB
- Chocolate Station
- Common Subsequence
- Star elements
- Special Numbers
- Sum of two large numbers
- Required Rooms
- Prime number of set bits
- Pairs with Positive Negative values
- Numbers containing 1, 2 and 3
- Mean of range in array
- Ana and Sweets
- GeeksforGeeks New System
- Geek and his Tricky Series
- Winner of an election
- Non-Repeating Element
- Find the maximum number of handshakes
- Closing bracket index
- Number of pairs with maximum sum
- Longest common prefix
- Pairs which are Divisible by 4
- Maximum AND Value
- Maximum distinct elements after removing K elements
- Maximum difference of zeros and ones in binary string
- Arya and The Great War
- Find out the Team
- Form a number divisible by 3 using array digits
- Check if array contains contiguous integers with duplicates allowed
- Rearrange an array such that arr[i] = i
- Winner of an election where votes are represented as candidate names
- C++ Alternate words in reverse order.
- C++ Visible Numbers
- Rope Cutting
- Ease the Array
- Pair the minimum
- Easy string
- Damon Prime
- Count pairs Sum in matrices
- C++ Matrix Rotation by 180 degree
- Check if a number is divisible by 8
- XOR of two numbers after making length of their binary representations equal
- Arya's Long String
- Akaash's Assignment
- Find the closest pair from two arrays
- Common Divisor
- The Inverting Factor
- Print all bitwise subsets of a number N
- Maximum sum of increasing order elements from n arrays
- The Non-repetitive String
- Longest substring with equal number of 0s and 1s
- Print Bracket Number
- Maximum number of partitions that can be sorted individually to make sorted
- Searching in an array where adjacent differ by at most k
- The Even Array
- Palindromic Series
- The Modified String
- The Optimal Selection
- Minimum changes to make all substrings distinct
- Sorting all array elements except one
- Lucky Ishaan
- Smallest greater elements in whole array
- Eulerian Path in an Undirected Graph
- Connell Sequence
- Product of Prime Factors
- Save Ironman
- Fitting The Array
- Find The Sequence
- Are you "Perfect"
- K-th missing element
- Sahil love good scorer
- Print adjacency list
- Java Collections | Set 6 (Stack)
- SP - K
^{th}largest and smallest - Catch The Nun
- Golden String
- Geek String
- Same Count After Sorting
- Odd Couples
- Pair with given sum in a sorted array
- Check XOR
- Reverse a linked list
- Occurence of an integer in a Linked List
- Delete N nodes after M nodes of a linked list
- Rotate a Linked List
- Pairwise swap elements of a linked list by swapping data
- Given a linked list of 0s, 1s and 2s, sort it.
- Add two numbers represented by linked lists
- Rearrange a linked list
- linked list of strings forms a palindrome
- Compare two linked lists
- Merge 2 sorted linked list in reverse order
- Detect Loop in linked list
- Remove duplicates from an unsorted linked list
- Sorted insert for circular linked list
- Split a Circular Linked List into two halves
- Reverse a Doubly Linked List
- Insertion Sort
- Merge Sort
- Quick Sort
- Right View of Binary Tree
- K distance from root
- Mirror Tree
- Two Mirror Trees
- Maximum Width of Tree
- Delete without head pointer
- Diameter of Binary Tree
- Check for Balanced Tree
- Heap Sort
- n'th node from end of linked list
- Left View of Binary Tree
- Delete Middle of Linked List
- Merge two sorted linked lists
- Sum Tree
- Decimal Equivalent of Binary Linked List
- Transform to Sum Tree
- Intersection of two sorted Linked lists
- Find Transition Point
- Queue using two Stacks
- Remove duplicate element from sorted Linked List
- Stack using two queues
- Level order traversal in spiral form
- Reverse Level Order Traversal
- DFS of Graph
- Reverse alternate levels of a perfect binary tree
- Insert a node in a BST
- BFS of graph
- Lowest Common Ancestor in a Binary Tree
- Determine if Two Trees are Identical
- Root to leaf path sum
- Print all nodes that don’t have sibling
- Postorder traversal from given Inorder and Preorder traversals
- Absolute List Sorting
- Lowest Common Ancestor in a BST
- Implement two stacks in an array
- Run Length Encoding
- Largest subarray of 0's and 1's
- Level order traversal Line by Line
- Print BST elements in given range
- Largest subarray with 0 sum
- Minimum Depth of a Binary Tree
- Remove duplicates in small prime array
- Odd even level difference
- Binary Tree to BST
- Max sum in the configuration
- Get minimum element from stack
- Equilibrium index of an array
- Unique rows in boolean matrix
- Remove every k'th node
- Is Binary Tree Heap
- Match specific pattern
- Validate an IP Address
- Find Maximum value
- C++ STL | Set 2 (pair)
- Sorted subsequence of size 3
- Java Collection | Set 1 (ArrayList) Part-2
- Java Collection | Set 2 (Set)
- Expression Tree
- Java Collection | Set 3 (HashMap) Part-2
- Maximum Difference
- Check if Linked List is Palindrome
- Max distance between same elements
- Longest Consecutive Subsequence
- Repetition of k length substring
- Generate Grey Code Sequences
- Delete a Node in Single Linked List
- Kth largest element in BST
- Find duplicates in an array
- Count distinct elements in every window
- Check if two strings are k-anagrams or not
- Max Level Sum in Binary Tree
- Special Stack
- Root to leaf paths sum
- Three way partitioning
- Sort a stack
- String Modification
- Longest consecutive sequence in Binary tree
- Print Common Nodes in BST
- Level order traversal
- Peak element
- Inorder Successor in BST
- Delete nodes greater than k
- Index Of an Extra Element
- Sum of given range
- Convert Ternary Expression to Binary Tree
- Union of Two Linked Lists
- Intersection of Two Linked Lists
- Insert in a Sorted List
- Split Singly Linked List Alternatingly
- Level of a Node in Binary Tree
- Sum of leaf nodes in BST
- Root to Leaf Paths
- Maximum path sum
- Counting Sort
- Max and min element in Binary Tree
- Perfect Binary Tree
- Counting elements in two arrays
- Reverse a string using Stack
- Linked List that is Sorted Alternatingly
- XOR of a given range
- Full binary tree
- Modify Linked List-1
- Symmetric Tree
- Construct Tree from Inorder & Preorder
- Merge Lists Alternatingly
- Arrange Consonants and Vowels
- Huffman Decoding
- Huffman Decoding-1
- Vertical sum
- Count Pairs whose sum is equal to X
- Insert in Sorted way in a Sorted DLL
- Check if Tree is Isomorphic
- Predecessor and Successor
- Leaves to DLL
- Maximum Node Level
- Children Sum Parent
- Find length of Loop
- Deletion and Reverse in Linked List
- Leaf under budget
- Linked List Matrix
- Reverse First K elements of Queue
- Remove Half Nodes
- Height of Spiral Tree
- Sum of Leaf Nodes
- Sum of Right Leaf Nodes
- Sum of Left Leaf Nodes
- Deletion in a Binary Tree
- Nodes at Odd Levels
- Sum of the Longest Bloodline of a Tree
- Exchange the Leaf Nodes
- ZigZag Tree Traversal
- Sum of Leaf Nodes at Min Level
- C++ STL Priority Queue
- Tilt of Binary Tree
- Move all zeros to the front of the linked list
- Delete middle element of a stack
- Rotate doubly Linked List by P nodes
- Java Collections | Set 7 (LinkedList)
- C++ complex number addition (operator overloading)
- SP - Digit Sum
- SP - Second Highest
- The New Line
- Data Types
- The Size of
- Taking input
- Learn to Comment
- GetLine and Ignore
- Learning to be precise
- Bitwise Operators
- Even Odd
- For Loop- primeCheck
- While loop- printTable
- Learning Macros
- Step by Step Condition
- Start Coding - Java
- The New Line - Java
- Data Types - Java
- Taking input - Java
- Learn to Comment - Java
- nextLine and next
- Precise Fomat - Java
- logical Operators - Java
- Bitwise Operators - Java
- Even Odd - Java
- For Loop- primeCheck - Java
- While loop- printTable - Java
- Step by Step Condition - Java
- Count Odd Even
- Need Some Change
- Count the Specials
- Matrix Interchange
- Predict the Column
- Xoring and Clearing
- Consonants and Vowels check
- Even Subsets
- Almost Equal
- The Pattern Matcher
- Count Odd Even - Java
- The Pattern Matcher - Java
- Need Some Change - Java
- Almost Equal -Java
- Count the Specials - Java
- Even Subsets - Java
- Matrix Interchange - Java
- Consonants and Vowels check - Java
- Predict the Column - Java
- Xoring and Clearing - Java
- Magic in CPP
- Swap the objects
- Structs and Objects
- Two Dimensional World
- Learning Structs
- Delete Array
- Pair in Java
- Maximum Integer Value - Java
- Maximum Area Rectangle
- Sum of Big Integers
- BigInteger Multiply
- BigInteger mod
- Find the Frequency
- Back to Front
- Pair Sum in Vector
- Student of the Year
- ArrayList Operation
- Operations on ArrayList
- Stack Operations
- Queue Operations
- Get min at pop
- Deque Implementations
- Min Heap implementation
- Strings Frequency
- Frequency Game
- Greater and Smaller Ones
- Duplicate Elements
- Multiset Operations
- Multimap Operations
- Pair Sum Existence
- Pair Sum Existence- Revisited
- The Dictionary Problem
- The Calendar Problem
- Dictionary Usage - Java
- Dictionary Usage 2 - Java
- Using Calendar - Java

- Coin Change
- Kadane's Algorithm
- Find Missing And Repeating
- Sum Of Prime
- Number of Unique Paths
- Excel Sheet | Part - 1
- Maximum Sub Array
- Print Diagonally
- Wave Array
- Overlapping Intervals
- Equal Sum
- Next Permutation
- Longest Increasing Subsequence
- Longest Common Subsequence
- Minimum number of jumps
- Count ways to reach the n’th stair
- Count ways to N'th Stair(Order does not matter)
- Egg Dropping Puzzle
- Edit Distance
- nCr
- Maximum Rectangular Area in a Histogram
- Consecutive 1's not allowed
- Longest Even Length Substring
- Path in Matrix
- Trapping Rain Water
- Case-specific Sorting of Strings
- Sum of bit differences
- Maximize The Array
- Number of Coins
- Minimum Platforms
- Find Prime numbers in a range
- Stock buy and sell
- Longest Palindrome in a String
- Relative Sorting
- Largest square formed in a matrix
- Row with max 1s
- Boolean Matrix Problem
- Sorting Elements of an Array by Frequency
- Nuts and Bolts Problem
- Rotate a 2D array without using extra space
- Minimum Cost of ropes
- Form a palindrome
- Preorder to Postorder
- Length of the longest substring
- Smallest number on left
- Longest consecutive subsequence
- Stock span problem
- Convert an array to reduced form
- Handshakes
- Palindromic Array
- Is Binary Number Multiple of 3
- Possible groups
- Minimum sum
- Nodes at even distance
- X Total Shapes
- Unique BST's
- K’th smallest element
- Longest Common Substring
- Count Palindrome Sub-Strings of a String
- Check if a string is repetition of its substring of k-length
- Minimums in Array
- Trie | (Insert and Search)
- Replace O's with X's
- Is Sudoku Valid
- Find whether path exist
- Length of largest region of 1's
- Rearrange characters
- First non-repeating character in a stream
- Count subsequences of type a^i b^j c^k
- Kth largest element in a stream
- Smallest distinct window
- Floyd Warshall
- Huffman Encoding
- Nearly Sorted Algorithm
- Smallest Absolute Difference
- Largest Sum Subarray of Size at least K
- Longest Bitonic subsequence
- Maximum sum Rectangle
- Array Pair Sum Divisibility Problem
- Job Sequencing Problem
- Top k numbers in a stream
- Rotten Oranges
- Numbers with alternative 1's
- Matrix Chain Multiplication
- Maximum bitonic subarray sum
- Maximum Tip Calculator
- Alternate Vowel and Consonant String
- Find the element at given index
- Print N-bit binary numbers having more 1’s than 0’s
- Find the Maximum sum
- Longest Sub-Array with Sum K
- Geek and Strings
- Container with most water
- Print Binary Tree levels in sorted order
- Maximize the sum of selected numbers from an array to make it empty
- SP - Meld Game
- Given a linked list, reverse alternate nodes and append at the end
- Reverse a Linked List in groups of given size.
- Delete nodes having greater value on right
- Count BST nodes that lie in a given range
- Check for BST
- Bottom View of Binary Tree
- Intersection Point in Y Shapped Linked Lists
- Add all greater values to every node in a BST
- Connect Nodes at Same Level
- Flattening a Linked List
- Diagonal Traversal of Binary Tree
- Boundary Traversal of binary tree
- Delete a node from BST
- Detect cycle in a directed graph
- Detect cycle in an undirected graph
- Maximum difference between node and its ancestor
- The Celebrity Problem
- Topological sort
- Print a Binary Tree in Vertical Order
- Merge K sorted linked lists
- Find the number of islands
- Serialize and Deserialize a Binary Tree
- Make Binary Tree
- Check if subtree
- Extreme nodes in alternate order
- Kth element in Matrix
- Clone a Binary Tree
- Remove loop in Linked List
- Implementing Dijkstra | Set 1 (Adjacency Matrix)
- Max length chain
- Interleaved Strings
- Count Palindromic Subsequences
- Minimum Swaps to Sort
- Rat in a Maze Problem
- Number of root to leaf paths
- Find the Closest Element in BST
- Delete keys in a Linked list
- Merge two BST 's
- Merge k Sorted Arrays
- Length of longest palindrome in linked list
- Print Nodes having K leaves
- Top View of Binary Tree
- Smallest range in K lists
- k-th smallest element in BST
- Polynomial Addition
- Euler circuit and Path
- Binary Tree to CDLL
- Find a pair with given target in BST
- Count Element Occurences
- Occurences of 2 as a digit
- Complete Binary Tree
- Populate Inorder Successor for all nodes
- K-Sum Paths
- Foldable Binary Tree
- Leftmost and rightmost nodes of binary tree
- Pairs violating BST property
- Median of BST
- Construct Tree from Preorder Traversal
- Convert Level Order Traversal to BST
- Count Number of SubTrees having given Sum
- C++ Friend function
- C++ Generic sort
- Sum Pair
- Employees Sorter - Java
- Operations on PriorityQueue
- Pattern Printer - CPP
- Existing Subsequence
- Count Students

- Maximum Index
- Minimum sum partition
- Maximum of minimum for every window size
- Largest Number formed from an Array
- Rearrange an array with O(1) extra space
- Return two prime numbers
- Ugly Numbers
- Largest rectangle of 1’s with swapping of columns allowed
- Path of greater than equal to k length
- N-Queen Problem
- Solve the Sudoku
- Find median in a stream
- Travelling Salesman Problem
- Distinct palindromic substrings
- Count the subarrays having product less than k
- SP - Minimum Cut
- Find the ODDs
- Order of Frequency
- Reorder List
- Binary Tree to DLL
- Longest Palindromic Substring in Linear Time
- Fixing Two nodes of a BST
- Prioritized Students