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SCHOOL (4)
BASIC (116)
EASY (319)
MEDIUM (399)
HARD (62)
- Sorting Elements of an Array by Frequency
- Rearrange characters
- Nearly Sorted Algorithm
- Reverse alternate nodes in Link List
- Rotate a Linked List
- Sort a linked list of 0s, 1s and 2s
- Add Number Linked Lists
- Rearrange a linked list
- Add 1 to a Linked List Number
- Linked List in Zig-Zag fashion
- Detect Loop in linked list
- Insert in Sorted Circular Linked List
- Count BST nodes that lie in a given range
- Check for BST
- Merge Sort
- Quick Sort
- Binary Tree from Inorder and Postorder
- Bottom View of Binary Tree
- Delete without head pointer
- Intersection in Y Shaped Lists
- Diameter of a Binary Tree
- Heap Sort
- Merge two sorted linked lists
- Add all greater values to every node in a BST
- Sum Tree
- Construct Binary Tree from Parent Array
- Connect Nodes of Levels
- Flattening a Linked List
- Diagonal Tree Traversal
- Stack using Queue
- Tree Boundary Traversal
- Reverse alternate levels of a perfect binary tree
- Implement stack using array
- Delete a node from BST
- Directed Graph Cycle
- Undirected Graph Cycle
- LCA in Binary Tree
- Maximum difference between node and its ancestor
- Lowest Common Ancestor in a BST
- Two Stacks in an Array
- Max sum path in two arrays
- The Celebrity Problem
- Largest subarray with 0 sum
- Topological sort
- Vertical Tree Traversal
- Merge K sorted linked lists
- Find the number of islands
- Find kth element of spiral matrix
- Max sum in the configuration
- Get Min from Stack
- Gas Station
- Linked List to Binary Tree
- Generate IP Addresses
- Check if subtree
- Extreme nodes in alternate order
- Kth smallest element in a Matrix
- Is Binary Tree Heap
- Clone a Binary Tree
- Validate an IP Address
- Remove loop in Linked List
- Dijkstra Algorithm
- Minimum Spanning Tree
- Largest BST
- Interleaved Strings
- Sum of permutations
- Sorted subsequence of size 3
- Sum of subset differences
- Count Palindromic Subsequences
- Multiply two strings
- Minimum Swaps to Sort
- Implement Atoi
- Maximum Difference
- Count of distinct substrings
- Palindrome Linked List
- Strongly Connected
- Print matrix in diagonal pattern
- Rat in a Maze
- Bipartite Graph
- Max sum subarray by removing at most one element
- Closest in BST
- BST with Dead End
- Merge two BST 's
- Minimum four sum subsequence
- Count distinct elements in every window
- k-Anagram
- Trie | (Delete)
- Merge k Sorted Arrays
- Root to leaf paths sum
- Print Nodes having K leaves
- Find triplets with zero sum
- Sort a stack
- Duplicate Subtree
- Top View of Binary Tree
- k-th Smallest in BST
- Find Common Nodes in two BSTs
- Level order traversal
- Peak element
- Merge Sort for Linked List
- Maximum Bipartite Matching
- Union of Two Linked Lists
- Binary Tree to CDLL
- Pair Sum in BST
- Populate Inorder Successor for all nodes
- Counting elements in two arrays
- K Sum Paths
- Foldable Binary Tree
- Construct Tree from Inorder & Preorder
- Isomorphic Trees
- Predecessor and Successor
- Children Sum in a Binary Tree
- Find length of Loop
- Duplicate Subtrees
- Sum of nodes on the longest path
- ZigZag Tree Traversal
- C++ Generic sort
- Mother Vertex
- Count set bits
- Tower Of Hanoi
- Reverse array in groups
- Smallest Positive Missing
- Maximum occured integer
- Wave Array
- Possible Words From Phone Digits
- Rearrange Array Alternately
- Rearrange an array with O(1) extra space
- Maximum Index
- Stock buy and sell
- Rotate Array
- Kadane's Algorithm
- Majority Element
- Binary Array Sorting
- Count Inversions
- Two Repeated Elements
- Unique BST's
- Union of 2 Sorted Arrays
- Indexes of Subarray Sum
- Count the number of possible triangles
- Sort by Absolute Difference
- Triplet Sum in Array
- Merge Without Extra Space
- Make Matrix Beautiful
- Boolean Matrix
- Spirally traversing a matrix
- Search in a sorted Matrix
- Distance of nearest cell having 1
- Subarray with 0 sum
- Subarray range with given sum
- Subarrays with equal 1s and 0s
- Sort Elements by Decreasing Frequency
- Longest Consecutive Subsequence
- Strings Rotations of Each Other
- Case-specific Sorting of Strings
- Postfix Evaluation
- Stock span problem
- Next Greater Element
- K Sized Subarray Maximum
- Minimum Cost of ropes
- Nearly sorted
- Find median in a stream
- Activity Selection
- Fractional Knapsack
- Job Sequencing Problem
- Minimum Platforms
- Largest number in K swaps
- Target Sum Combinations
- M-Coloring Problem
- Minimum Jumps
- Stickler Thief
- Ways to Reach the n'th Stair
- Egg Dropping Puzzle
- Optimal Strategy For A Game
- Longest Increasing Subsequence
- Longest Common Subsequence
- 0 - 1 Knapsack Problem
- Sort according to an Array
- Allocate Minimum Pages
- Preorder to BST
- X Total Shapes
- Zero Sum Subarrays
- Find whether path exist
- Kth Smallest
- Implement Trie
- Nth number made of prime digits
- Shortest Common Supersequence
- Nth Catalan Number
- Rotten Oranges
- Steps by Knight
- Most frequent word in an array of strings
- Maximize The Cut Segments
- Container With Most Water
- Print Anagrams Together
- Rotate by 90 degree
- Top K Frequent in Array
- Closest Three Sum
- Word Break
- Stock Buy and Sell – Multiple Transaction Allowed
- Generate Parentheses
- Word Boggle
- Prerequisite Tasks
- 4 Sum - All Quadruples
- Excel Sheet | Part - 1
- Sort 0s, 1s and 2s
- Taking 1 out of 3 consecutives
- Complement
- Longest sub-sequence such that difference between adjacents is one
- Maximum Sub Array
- Sum of Subarrays
- Equal Sum
- Large Factorial
- Longest Span in two Binary Arrays
- Maximize Number of 1's
- Sum of Middle elements of two sorted arrays
- Mr. Modulo and Arrays
- Single Among Doubles in a Sorted
- Consecutive 1's not allowed
- Count Occurences of Anagrams
- Pythagorean Triplet
- Painting the Fence
- Pair Sum Closest to 0
- Search in Rotated Sorted Array
- Smallest number with at least n trailing zeroes in factorial
- Maximize The Array
- Max Score from Subarray Mins
- Form the Largest Number
- Efficiently sorting numbers in range from 0 to n^2 - 1
- Water Collection
- Add Binary Strings
- Subarray Sum Divisible By K
- Maximum Product Subarray
- Longest subarray with sum divisible by K
- Row with max 1s
- Max value after m range operation
- Swapping pairs make sum equal
- Check if frequencies can be equal
- Column name from a given column number
- Design a tiny URL or URL shortener
- Sort in specific order
- Form a palindrome
- Nuts and Bolts Problem
- Longest Subarray with Sum K
- Transform String
- Count the Reversals
- Sum of two large numbers
- Max Sum without Adjacents
- Equal 0, 1 and 2
- Factorials of large numbers
- Maximum length Bitonic Subarray
- Length of the longest substring
- The Tiny Miny
- k largest elements
- Magnet Array Problem
- Longest Common Substring
- Smallest distinct window
- Longest substring with distinct characters
- Longest Palindrome in a String
- Look and Say Pattern
- Minimum steps to get desired array
- K-th element of two Arrays
- Longest Arithmetic Subsequence
- Triplets with Smaller Sum
- Greater tower sum
- Aditya and his building blocks
- Subset with no pair sum divisible by K
- Pick Values
- Minimum swaps and K together
- LCS of three strings
- Longest Palindromic Subsequence
- Largest Sum Subarray of Size at least K
- First negative in every window of size k
- Find the number of subarrays having even sum
- Maximum difference of zeros and ones in binary string
- Minimum sum
- Not a subset sum
- Minimize the Heights II
- Surpasser Count
- First and Last Occurrences
- Construct binary palindrome by repeated appending and trimming
- Palindrome in Alphanumeric String
- Minimum Deletions
- Valid Substring
- Minimum number of deletions
- Minimum Swaps for Bracket Balancing
- Permutations of a String
- Missing Intervals
- Friends Pairing Problem
- Special Numbers
- Count divisors of product of array elements
- Unique Number II
- Largest prime factor
- Max Sum Increasing Subsequence
- Minimum cost to fill given weight in a bag
- Coin Change (Count Ways)
- Mobile numeric keypad
- Gold Mine Problem
- Coin Change (Minimum Coins)
- Perfect Sum Problem
- Smallest number
- Longest subsequence-1
- Power Set
- Knapsack with Duplicate Items
- nCr
- Geek and its Game of Coins
- Maximum path sum in matrix
- Special Keyboard
- Partition Equal Subset Sum
- Longest Bitonic subsequence
- Array Pair Sum Divisibility Problem
- Magic Triplets
- Matchsticks game
- Subset Sums
- N Digit numbers with digits in increasing order
- Number of paths
- Number of paths in a matrix with k coins
- Count Total Setbits
- Squares in Rectangle
- Sum of Query II
- Find Prime numbers in a range
- Game with String
- Fraction to Repeating Decimal
- Next Permutation
- Rank The Permutations
- Rotate matrix elements clockwise
- Array Sum Excluding Subarrays
- Longest Repeating Subsequence
- Longest alternating subsequence
- Stream First Non-repeating
- Segregate even and odd nodes in a Linked List
- Water Overflow
- Kth Largest in a Stream
- Snake and Ladder Problem
- Geek and Strings
- Eulerian Path in an Undirected Graph
- Replace O's with X's
- Check Mirror in N-ary tree
- Traverse All Edges And Vertices
- Find the string in grid
- Floyd Warshall
- Flood fill Algorithm
- Array to BST
- Image Multiplication
- Recursively Remove Adjacent Duplicates
- Triplets in Sorted Linked List
- Escape the Forbidden Forest
- Jump Game
- Max Diff Elements and Indexes
- Triplets with sum with given range
- Preorder traversal (Iterative)
- Subset Sum Problem
- Bellman-Ford
- Gray Code
- Subarrays with sum K
- Remove BST keys outside given range
- Partition a Linked List around a given value
- Minimum XOR value pair
- Clone a stack without using extra space
- Maximum XOR of two numbers in an array
- Count pairs in array divisible by K
- Construct list using given q XOR queries
- Prefix match with other strings
- Maximum sum leaf to root path
- Division without using multiplication, division and mod operator
- Minimize the Heights I
- Flatten binary tree to linked list
- Anti Diagonal Traversal of Matrix
- Minimum times A has to be repeated such that B is a substring of it
- Special Matrix
- Fill the Matrix
- Add Minimum Characters
- IPL 2021 - Match Day 2
- Maximum Intersecting Lines
- Make array elements unique
- Compute Before Matrix
- Maximum Winning score
- Distinct Coloring
- Smallest distinct window
- Robots
- Unique Number III
- Minimum times A has to be repeated such that B is a substring of it
- Longest Competitive Subsequence
- Programming Contest
- Maximum Length
- Overlapping Intervals
- Walls Coloring
- Reverse a Stack
- Minimum Steps Required
- Farthest number
- Robots
- Max Equal sum of 3 Stacks
- Buy Maximum Stocks
- Smallest sum contiguous subarray
- Even Swap
- Count number of substrings
- Maximum Bipartite Matching
- LCS
- Rotten Oranges
- Geeks And The String
- Find the longest string
- Optimal Array
- Collect Maximum Oranges
- Geek and New Job
- 3 - Numbers
- Reverse a linked list
- Frequency in a Linked List
- Delete N nodes after M nodes of a linked list
- Pairwise swap elements of a linked list
- Node at a given index in linked list
- Delete nodes having greater value on right
- Remove duplicates from an unsorted linked list
- Split a Linked List into two halves
- Delete in a Doubly Linked List
- Inorder Traversal
- Reverse a Doubly Linked List
- Bubble Sort
- Right View of Binary Tree
- Mirror Tree
- Two Mirror Trees
- Maximum Width of Tree
- Height of Binary Tree
- Balanced Tree Check
- Kth from End of Linked List
- Middle of a Linked List
- Check If Circular Linked List
- Left View of Binary Tree
- Delete Middle of Linked List
- Transform to Sum Tree
- Intersection Sorted Linked Lists
- Find Transition Point
- Queue using two Stacks
- Remove Duplicates from a Sorted Linked List
- Postorder Traversal
- Level Order in spiral form
- Reverse Level Order Traversal
- DFS of Graph
- Stack using Linked List
- Insert a node in a BST
- BFS of graph
- Identical Trees
- Root to leaf path sum
- Square Root
- Nodes without a Sibling
- Binary Search
- Run Length Encoding
- Largest subarray of 0's and 1's
- Remove Duplicates Sorted Array
- Level Order Line by Line
- BST Keys in a Range
- Minimum Depth of a Binary Tree
- Remove Duplicates from an array
- Odd even level difference
- Binary Tree to BST
- Equilibrium index of an array
- Unique rows in boolean matrix
- Remove every k'th node
- Leaves at Same Level or Not
- Third largest element
- Convert to Roman No
- Match specific pattern
- Find Maximum value
- Multiply two linked lists
- Josephus problem
- You and your books
- Expression Tree
- Max distance between same elements
- Longest Consecutive Subsequence
- Count Occurrence of digit k
- Delete in a Singly Linked List
- Kth largest element in BST
- Minimum distance in an Array
- Array Duplicates
- Max Level Sum in Binary Tree
- Special Stack
- Three way partitioning
- String Modification
- Longest consecutive sequence in Binary tree
- Inorder Successor in BST
- Index of an Extra Element
- Intersection of Two Linked Lists
- Insert in a Sorted List
- Play with an array
- Level of a Node in Binary Tree
- Minimum element in BST
- Reverse Using Stack
- Symmetric Tree
- Delete Alternate Nodes
- Construct BST from Postorder
- Huffman Decoding-1
- Count Pairs whose sum is equal to X
- Maximum Pairwise Computed Value
- Queue Reversal
- Reverse first K of a Queue
- Magical Number
- Find Sum Pairs Across Two BSTs
- Product of an Array
- The New Line
- Swap the array elements
- Count the Specials
- Predict the Column
- Count Odd Even - Java
- Need Some Change - Java
- Count the Specials - Java
- Matrix Interchange - Java
- Predict the Column - Java
- Learning Structs
- Find the Frequency
- Java ArrayList Operation
- Reverse an Array
- Operations on PriorityQueue
- First Set Bit
- Rightmost different bit
- Check K-th Bit
- Longest Consecutive 1's
- Modular Inverse
- Power of 2
- Swap odd and even bits
- Frequencies in a Limited Array
- Equilibrium Point
- Array Leaders
- Floor in a Sorted Array
- Minimum Number in a sorted rotated array
- Roof Top
- Anagram
- String Rotated by 2 Places
- Isomorphic Strings
- Reverse Words
- Minimum indexed character
- Panagram Checking
- Non Repeating Character
- Parenthesis Checker
- N meetings in one room
- Reach a given score
- Count ways to N'th Stair
- Count number of hops
- First Repeating Element
- Union of Arrays with Duplicates
- Common Elements
- Check Equal Arrays
- Numbers containing 1, 2 and 3
- Pair with largest sum which is less than K in the array
- Missing in Array
- Product array puzzle
- Roman Number to Integer
- Intersection of Arrays with Distinct
- Mean of range in array
- Adding One
- Max Value Permutation
- Missing And Repeating
- Cumulative frequency of count of each element in an unsorted array
- Non-Repeating Element
- Last seen array element
- Pairs of equals Sum
- Count the elements
- Maximum Gap
- Find Kth Rotation
- Sort by Set Bit Count
- Professor and Parties
- k sorted array
- Maximize sum after K negations
- Adding Ones
- Pairs with certain difference
- Common in 3 Sorted Arrays
- Sorted and Rotated Minimum
- Maximum no of 1's row
- Move All Zeroes to End
- String Duplicates Removal
- Equal Sum and Product
- Minimize the sum of product
- Missing number
- Move all negative elements to end
- Chocolate Distribution Problem
- Count the triplets
- Find Pair Given Difference
- Permutations in array
- Swap and Maximize
- Bitonic Point
- Find Duplicate Element
- Smallest subarray with sum greater than x
- Sort Array II
- Alternate Positive Negative
- Maximum Possible Sum of Products
- Remove Consecutive Characters
- Convert a sentence into its equivalent mobile numeric keypad sequence
- Addition of submatrix
- Form largest number from digits
- Arya's Long String
- Remove Duplicates
- Nearest multiple of 10
- Reorganize The Array
- Facing the sun
- Greater on right side
- Jumping Caterpillars
- Convert array into Zig-Zag fashion
- Rotate Bits
- Second most repeated string in a sequence
- Check if array contains contiguous integers
- Find all pairs with a given sum
- Number of occurrence
- Find the left over element
- Rope Cutting
- Modify the Array
- Pair the minimum
- Convert an array to reduced form
- Find missing in second array
- Longest Common Prefix of Strings
- Largest Fibonacci Subsequence
- First Repeated Character
- Min Number of Flips
- Sum of distinct elements for a limited range
- Counts Zeros Xor Pairs
- Two sum -Pairs with 0 Sum
- Segregate 0s and 1s
- Inverse Permutation
- Play With OR
- At Least K Occurrences
- Max sum submatrix
- Element with left side smaller and right side greater
- Count the Zeros
- Total distance travelled in an array
- Merge two binary Max heaps
- Palindrome String
- Total count
- Search array with adjacent diff at most k
- Chocolate Station
- Pair with given sum in a sorted array
- Shop in Candy Store
- Colorful Strings
- Minimum Operations
- Number of 1 Bits
- Armstrong Numbers
- Rearrange the array
- Nth Fibonacci Number
- Maximum size of consecutives
- Star elements
- Toggle bits in the given range
- Completing tasks
- Shortest path from 1 to n
- Find maximum number
- Minimum number of Coins
- Number Of Open Doors
- Number of Groups
- Nth Pentagonal Number
- Maximize Toys
- Largest number possible
- Page Faults in LRU
- Tricky Sorting Cost
- Trailing zeroes in factorial
- Form a number divisible by 3 using array digits
- Series GP
- Total number of Strings
- Subtraction and two numbers
- Triangular Number
- BBT counter
- Is Square
- Arithmetic Number
- Row with Minimum 1s
- Farthest number
- Multiply two polynomials
- Letters Collection
- Kronecker Product
- Overlapping rectangles
- Break Numbers[Duplicate problem]
- Earthquake and the Paint Shop
- Sum of k smallest elements in BST
- Print Diagonally
- Largest value in each level
- Find the X
- Absolute difference divisible by K
- Construction of a string
- Minimum Swaps
- Frogs and Jumps
- Transform to Sum Tree
- Make array elements equal
- Silver and Gold
- Negative Prefix
- Geek and Co-Prime Numbers
- Geek's House party
- Zero
- Remainder on dividing by 11
- Mean BST
- Count the Substrings
- Shift squares
- Geeks And Arithmetic Progression
- Can Nobita meet Sizuka?
- Will Dekisugi prove his intelligence?
- Will Sizuka be impressed?
- Last modified ball
- Competitive String
- Minimize the sum
- The Ultimate Duel
- The Final Task
- Number of Subarrays of 0's
- Increasing subarray
- Geek's Invention
- Binary Modulo
- Finding Non Zero Digit
- Split the binary string into substrings with equal number of 0s and 1s
- Smallest Subset with Greater Sum
- CBA Subsequence
- Make Palindrome
- Assign Tasks
- Arithmetic Number
- Even Sum
- Count the Substrings
- Minimum product
- K divisible array
- Distinct Subsequence
- Same characters
- Sorted array
- Equal Left and Right Subarray Sum
- Equal strings
- Game Of Two
- Balloon Everywhere
- Maximum occurring digit
- Assign Tasks
- Maximum Frequency
- Reverse both parts
- Yet another query problem
- Odd Series
- Find the number of Matchsticks
- Linked List Group Reverse
- Reorder List
- Binary Tree to DLL
- Clone List with Next and Random
- Min distance between two given nodes of a Binary Tree
- Max rectangle
- Distinct occurrences
- LRU Cache
- Partition array to k subsets
- Alien Dictionary
- Smallest range in K lists
- Max Path Sum 2 Special Nodes
- Trapping Rain Water
- Max Circular Subarray Sum
- Smallest window containing all characters
- Histogram Max Rectangular Area
- Solve the Sudoku
- Minimum Cost Path
- Median of 2 Sorted Arrays of Different Sizes
- Merge Without Extra Space
- Next Smallest Palindrome
- Count Pairs in an Array
- The Painter's Partition Problem-II
- Palindrome SubStrings
- Distinct palindromic substrings
- Search Pattern
- Largest rectangle of 1s with swapping of columns allowed
- Longest Prefix Suffix
- Wildcard string matching
- Edit Distance
- Minimum sum partition
- Number Formation
- Palindromic Partitioning
- Stock Buy and Sell – Max K Transactions Allowed
- Matrix Chain Multiplication
- Median in a row-wise sorted Matrix
- Very Tough Problem
- Boolean Parenthesization
- Longest valid Parentheses
- Word Break - 2
- N-Queen Problem
- Geek collects the balls
- Phone directory
- Optimal binary search tree
- Longest Path in a matrix
- Word Wrap
- Maximum sum Rectangle
- Let's Play!!!
- Huffman Encoding
- Water Connection Problem
- Smallest Positive Integer that can not be represented as Sum
- Search Pattern (Rabin-Karp Algorithm)
- Maximum XOR subarray
- Sorted Linked List to BST
- Palindrome Pairs
- Reverse a sublist of a linked list
- Shortest Unique prefix for every word
- Fixing Two swapped nodes of a BST
- IPL 2021 - Final
- Maximum Number of coins
- Minimum Number Of Sprinkler
- Ways to color a board
- Rotate Array
- Print Linked List
- Find Length of Linked List
- Count Leaves in Binary Tree
- Queue using Linked List
- Queue Using Array
- Add two fractions
- Replace all 0's with 5
- Replace all 0's with 5
- Print number pattern
- Largest product
- Preorder Traversal
- First Occurence
- Sum Except First and Last
- Palindromic Array
- Linked List Insertion At End
- Is Linked List Length Even?
- Identical Linked Lists
- Triplet Family
- Insert in Middle of Linked List
- Alternates in an Array
- Count Odd and Even
- Sum Array Puzzle
- Sum of diagonals
- Bit Difference
- Number is sparse or not
- Print 1 To N Without Loop
- Array Search
- Sorted Array Search
- Remove common characters and concatenate
- Reverse a String
- Binary Array Sorting
- Rearranging array
- Sum of Array
- Sum of Natural Numbers
- Searching in an Array
- Count pair sum
- Print Elements of Array
- Balanced Array
- At least two greater elements
- Check Arithmetic Progression
- Sort a String
- Anagram Palindrome
- Alternative Sorting
- Check if divisible by 4
- Maximum product of two numbers
- Value equal to index value
- Convert a list of characters into a String
- Encrypt the string - 1
- Maximum triplet sum in array
- Fighting the darkness
- Reverse sub array
- Sum of distinct elements
- Uncommon characters
- Swap kth elements
- A guy with a mental problem
- Repeated Character
- First 1 in a Sorted Binary Array
- Missing number in shuffled array
- Max and Min Product from 2 Arrays
- Display longest name
- Find element at a given Index
- Last index of One
- Front-Back Transformation - copy
- Merge two strings
- Largest Element in Array
- Rotate Array by One
- Sum Triangle for given array
- Game with nos
- One odd Occuring
- Ishaan Loves Chocolates
- Array Subset
- C++ Strings
- Count of smaller elements
- Min and Max in Array
- Multiply left and right array sum
- Extract Maximum
- Smallest number repeating K times
- Good or Bad string
- Snake Case
- Program to print reciprocal of letters
- Magical String[Duplicate Problem]
- Difference between highest and lowest occurrence
- GCD of two numbers
- XOR of all elements
- Check for Power
- Find position of set bit
- Set kth bit
- XOR Count Zero and One
- Find the fine
- Strong Numbers
- Nth Even Fibonacci Number
- set-bits and number
- LCM And GCD
- Longest Increasing Subarray
- C++ Data Types
- Binary Shift to Divide
- Median of an Array
- Sum of Digit is Palindrome or not
- Reverse digits
- Binary number to decimal number
- Series AP
- Java 1-d and 2-d Array
- C++ 2-D Arrays | Set-1
- Multiplication Table
- Square Divisors
- Count Squares
- Middle of Three
- Print the Kth Digit
- Reading books
- Finding Position
- Squares in a Matrix
- Addition of two square matrices
- Sorted matrix
- Student record
- Preorder Traversal