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SCHOOL (3)
BASIC (119)
EASY (291)
MEDIUM (534)
HARD (111)
- Winner of an election
- Geek-onacci Number
- The Hiring Contest
- Reverse 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
- Delete in a Doubly Linked List
- Inorder Traversal
- Reverse a Doubly Linked List
- Bubble Sort
- Selection Sort
- Insertion Sort
- Check for BST
- Right View of Binary Tree
- K distance from root
- Mirror Tree
- Maximum Width of Tree
- Delete without head pointer
- 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
- Decimal Equivalent of Binary Linked List
- Transform to Sum Tree
- Intersection Sorted Linked Lists
- Find Transition Point
- Queue using two Stacks
- Remove Duplicates from a Sorted Linked List
- Stack using two queues
- 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
- Square Root
- Nodes without a Sibling
- Lowest Common Ancestor in a BST
- Binary Search
- Largest subarray of 0's and 1's
- Remove Duplicates Sorted Array
- Minimum Depth of a Binary Tree
- Odd even level difference
- Binary Tree to BST
- Unique rows in boolean matrix
- Toeplitz matrix
- Remove every k'th node
- Leaves at Same Level or Not
- Third largest element
- Josephus problem
- Max distance between same elements
- Count Occurrence of digit k
- Delete in a Singly Linked List
- Kth largest element in BST
- Minimum distance in an Array
- Array Duplicates
- Three way partitioning
- Level order traversal
- Inorder Successor in BST
- Index of an Extra Element
- Disjoint set (Union-Find)
- Insert in a Sorted List
- Sum of leaf nodes in BST
- More than n/k Occurrences
- Counting Sort
- Reverse Using Stack
- XOR of a given range
- Symmetric Tree
- Delete Alternate Nodes
- Find the Sum of Last N nodes of the Linked List
- Count Pairs whose sum is equal to X
- Find length of Loop
- Find n/k th node in Linked list
- Queue Reversal
- Reverse first K of a Queue
- Sum of Leaf Nodes
- Closest Neighbour in BST
- Move all zeros to the front of the linked list
- Delete Mid of a Stack
- Swap the array elements
- Predict the Column
- Xoring and Clearing
- Find the Frequency
- Frequency in Queue
- Max and Second Max
- First Set Bit
- Rightmost different bit
- Check K-th Bit
- Power of 2
- Swap odd and even bits
- Wave Array
- Frequencies in a Limited Array
- Equilibrium Point
- Array Leaders
- Floor in a Sorted Array
- Minimum Number in a sorted rotated array
- Print adjacency list
- Rotate by 90 degree
- Matrix Boundary Traversal
- Anagram
- Winner of an election
- String Rotated by 2 Places
- Isomorphic Strings
- Reverse Words
- Panagram Checking
- Non Repeating Character
- Parenthesis Checker
- Minimum indexed character
- Generate Binary Numbers
- Minimum Cost of ropes
- N meetings in one room
- Largest number with given sum
- Reach a given score
- Union-Find
- Count ways to N'th Stair
- Count number of hops
- First Repeating Element
- Union of Arrays with Duplicates
- Check Equal Arrays
- Positive Negative Pair
- Missing in Array
- Product array puzzle
- Roman Number to Integer
- Intersection of Arrays with Distinct
- Max Value Permutation
- Missing And Repeating
- Count the elements
- Find the closest number
- Sort by Set Bit Count
- Maximize sum after K negations
- Pairs with certain difference
- Common in 3 Sorted Arrays
- Sum of elements between k1'th and k2'th smallest elements
- Move All Zeroes to End
- String Duplicates Removal
- Minimize the sum of product
- String Manipulation
- Strange Sort
- Count pairs Sum in matrices
- Count the triplets
- Find Pair Given Difference
- Permutations in array
- Bitonic Point
- Alternate Positive Negative
- Check if actual binary representation of a number is palindrome
- Closing bracket index
- Remove Consecutive Characters
- Check if the number is balanced
- Rearrange a string
- Remove Duplicates
- Add two numbers represented by two arrays
- Twice Counter
- Word with maximum frequency
- Second Largest
- Convert array into Zig-Zag fashion
- Rotate Bits
- Find all pairs with a given sum
- Number of occurrence
- Reversing the equation
- Does array represent Heap
- Check if array is sorted
- Find missing in second array
- String's Count
- Longest Common Prefix of Strings
- First Repeated Character
- Counts Zeros Xor Pairs
- Two sum -Pairs with 0 Sum
- Segregate 0s and 1s
- Play With OR
- Hungry Pizza Lovers
- Digits in a set
- At Least K Occurrences
- Find the closest pair from two arrays
- Count the Zeros
- Merge two binary Max heaps
- Four Elements
- Palindrome String
- Maximum average subarray
- Search array with adjacent diff at most k
- Smallest greater elements in whole array
- Fitting The Array
- Shop in Candy Store
- Odd Even Problem
- Binary representation of next number
- Partition a number into two divisible parts
- Is Binary Number Multiple of 3
- Kth LSB
- Maximum prefix sum for a given range
- Extract the Number from the String
- Minimum Operations
- Divisibility by 8
- Number of 1 Bits
- Find the Highest number
- Check if a Integer is power of 8 or not
- Armstrong Numbers
- Midori and chocolates
- Max Sum Subarray of size K
- Nth Fibonacci Number
- Change Bits
- Swap two nibbles in a byte
- Set all the bits in given range of a number
- Maximum Sum Problem
- Party of Couples
- Shortest path from 1 to n
- Sum 1 to n Divisors
- Count numbers containing 4
- Find maximum number
- Swap bits
- Reach the Nth point
- Minimum number of Coins
- Perfect Numbers
- Nth item through sum
- Geek and his Binary Strings
- Maximize Toys
- Largest number possible
- Page Faults in LRU
- Check if it is possible to survive on Island
- Recamans sequence
- Squares in N*N Chessboard
- Compare two fractions
- Form a number divisible by 3 using array digits
- Maximum sum difference
- Sum of First N Natural Numbers
- Find nth root of m
- Prime Factors
- Circular Prime Number
- Juggler Sequence
- Tom and Jerry
- Maximum Diamonds
- Arithmetic Number
- Row with Minimum 1s
- Surround the 1's
- Coverage of all Zeros in a Binary Matrix
- Help Ishaan
- Multiply two polynomials
- Trace Path
- Sequence Fun
- Letters Collection
- Game of digits
- Rearrange Geek and his Classmates
- Help the Old Man!!!
- Print Pattern
- K-Ary Tree
- Array to BST
- Sum of dependencies in a graph
- Count all possible paths from top left to bottom right
- Fraction Trouble
- Print Diagonally
- Find maximum volume of a cuboid
- Plus One
- Sum of two numbers without using arithmetic operators
- Even and Odd
- Search insert position of K in a sorted array
- Largest value in each level
- Maximum number of 2X2 squares
- License Key Formatting
- Count the Substrings
- Find all possible paths from top to bottom
- Minimum Sum of Absolute Differences of Pairs
- Smallest window containing 0, 1 and 2
- Move Last Element to Front of a Linked List
- Insert an Element at the Bottom of a Stack
- Can Make Triangle
- Matrix Operations
- Triangle and Square
- Kth Mex
- Fibonacci series up to Nth term
- Divisor Game
- Geek left with No Food
- Graph and Vertices
- Last modified ball
- Transform to Sum Tree
- Parent of Max GCD Siblings in a Binary Tree
- Find the first node of loop in linked list
- Maximum Weight Node
- Geek & Geekina Purchasing Ice Cream
- Toggle
- Frogs and Jumps
- Make Array Elements Equal
- Equal Left and Right Subarray Sum
- Make the array beautiful
- Remainder on dividing by 11
- Taxi Booking
- Binary matrix having maximum number of 1s
- Minimum Integer
- Rank of Matrix
- Sorting Elements of an Array by Frequency
- Nearly Sorted Algorithm
- Minimum Moves
- Reverse alternate nodes in Link List
- Rotate a Linked List
- Add Number Linked Lists
- Add 1 to a Linked List Number
- Merge 2 sorted linked list in reverse order
- Detect Loop in linked list
- Insert in Sorted Circular Linked List
- Count BST nodes that lie in a given range
- Merge Sort
- Quick Sort
- Binary Tree from Inorder and Postorder
- Bottom View of Binary Tree
- 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
- Flattening a Linked List
- Diagonal Tree Traversal
- Delete a node from BST
- Directed Graph Cycle
- Undirected Graph Cycle
- LCA in Binary Tree
- Range Minimum Query
- Two Stacks in an Array
- The Celebrity Problem
- Largest subarray with 0 sum
- Topological sort
- Vertical Tree Traversal
- Merge K sorted linked lists
- Find the number of islands
- Max sum in the configuration
- Get Min from Stack
- Gas Station
- Check if subtree
- Kth element in Matrix
- Is Binary Tree Heap
- Validate an IP Address
- Remove loop in Linked List
- Dijkstra Algorithm
- Minimum Spanning Tree
- Additive sequence
- Largest BST
- Interleaved Strings
- Count Palindromic Subsequences
- Multiply two strings
- Minimum Swaps to Sort
- Implement Atoi
- Palindrome Linked List
- Strongly Connected
- Print matrix in diagonal pattern
- Rat in a Maze Problem - I
- Bipartite Graph
- Closest in BST
- BST with Dead End
- Count distinct elements in every window
- Trie | (Delete)
- Merge k Sorted Arrays
- 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
- Union of Two Linked Lists
- Euler circuit and Path
- Ancestors in Binary Tree
- Binary Tree to CDLL
- Pair Sum in BST
- Root to Leaf Paths
- Counting elements in two arrays
- Construct Tree from Inorder & Preorder
- Arrange Consonants and Vowels
- Count the nodes at distance K from leaf
- Isomorphic Trees
- Predecessor and Successor
- Children Sum in a Binary Tree
- Diagonal sum in binary tree
- Deletion and Reverse in Circular Linked List
- Normal BST to Balanced BST
- ZigZag Tree Traversal
- Count Number of SubTrees having given Sum
- C++ Generic sort
- Swap Kth nodes from ends
- Maximum sum of Non-adjacent nodes
- Mother Vertex
- Ceil in BST
- Count set bits
- Gray to Binary Conversion
- Tower Of Hanoi
- Smallest Positive Missing
- Power Of Numbers
- Maximum occured integer
- 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
- Count Inversions
- Two Repeated Elements
- Unique BST's
- Union of 2 Sorted Arrays
- Indexes of Subarray Sum
- Count the number of possible triangles
- Triplet Sum in Array
- Number of pairs
- Merge Without Extra Space
- Possible paths between 2 vertices
- Level of Nodes
- Make Matrix Beautiful
- Boolean Matrix
- Spirally traversing a matrix
- Search in a sorted Matrix
- Distance of nearest cell having 1
- Unit Area of largest region of 1's
- Subarray with 0 sum
- Subarrays with equal 1s and 0s
- Sort Elements by Decreasing Frequency
- Longest Consecutive Subsequence
- Case-specific Sorting of Strings
- Postfix Evaluation
- Stock span problem
- Next Greater Element
- K Sized Subarray Maximum
- Nearly sorted
- Activity Selection
- Fractional Knapsack
- Job Sequencing Problem
- Minimum Platforms
- Unique Subsets
- Minimum Jumps
- Detect Cycle using DSU
- Stickler Thief
- Ways to Reach the n'th Stair
- Optimal Strategy For A Game
- Sum of all substrings of a number
- Longest Increasing Subsequence
- Longest Common Subsequence
- 0 - 1 Knapsack Problem
- Number of Unique Paths
- 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
- Shortest Common Supersequence
- Nth Catalan Number
- Rotten Oranges
- Steps by Knight
- Most frequent word in an array of strings
- Count subsequences of type a^i, b^j, c^k
- Maximize The Cut Segments
- Print Anagrams Together
- Rotate by 90 degree
- Top K Frequent in Array
- Word Break
- Stock Buy and Sell – Multiple Transaction Allowed
- Word Search
- Word Boggle
- Prerequisite Tasks
- 4 Sum - All Quadruples
- Sort 0s, 1s and 2s
- Taking 1 out of 3 consecutives
- Complement
- Maximum Sub Array
- Pascal Triangle
- Maximum Index
- Flip Bits
- Sum of Subarrays
- Equal Sum
- Top k numbers in a stream
- Maximize Number of 1's
- Sum of Middle elements of two sorted arrays
- Equivalent Sub-Arrays
- Single Among Doubles in a Sorted
- Count Occurences of Anagrams
- Single Among Doubles
- Pythagorean Triplet
- Happiest Triplet
- Pair Sum Closest to 0
- Search in Rotated Sorted Array
- Smallest factorial number
- Sum of bit differences
- Print Binary Tree levels in sorted order
- Maximize The Array
- Form the Largest Number
- Efficiently sorting numbers in range from 0 to n^2 - 1
- Marks of PCM
- Alternate Vowel and Consonant String
- Add Binary Strings
- Maximum Product Subarray
- Longest subarray with sum divisible by K
- Row with max 1s
- Swapping pairs make sum equal
- Check if frequencies can be equal
- Column name from a given column number
- Concatenation of Zig-Zag String in n Rows
- Substrings with K Distinct
- Palindrome SubStrings
- Form a palindrome
- Nuts and Bolts Problem
- Longest Subarray with Sum K
- Transform String
- Count the Reversals
- Number of positive integral solutions
- Sum of two large numbers
- Max Sum without Adjacents
- Factorials of large numbers
- Shuffle integers
- The Fibonacci-prime number
- Reverse each word in a given string
- Find the N-th character
- Length of the longest substring
- Remove leading zeros from an IP address
- The Tiny Miny
- k largest elements
- Sum of XOR of all pairs
- Magnet Array Problem
- Longest Common Substring
- Smallest distinct window
- Longest Substring with K Uniques
- Longest Palindrome in a String
- Valid Expression
- Integer to Words
- K-th element of two Arrays
- String formation from substring
- Triplets with Smaller Sum
- Rod Cutting
- Greater tower sum
- K closest elements
- Minimum swaps and K together
- Maximize the sum of selected numbers from a sorted array to make it empty
- Smallest Absolute Difference
- 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
- Minimize the Heights II
- First and Last Occurrences
- Smaller on Left
- Minimum Deletions
- Maximum Product of Increasing Subsequence of Size 3
- Print N-bit binary numbers having more 1s than 0s
- Valid Substring
- Permutations of a String
- Number following a pattern
- Previous number in one swap
- Friends Pairing Problem
- CamelCase Pattern Matching
- Lexicographically smallest string
- Sum of Products
- Unique Number II
- Bleak Numbers
- Modular Exponentiation
- Game of XOR
- Maximum Tip Calculator
- Minimum number of deletions and insertions
- Max Sum Increasing Subsequence
- Minimum cost to fill given weight in a bag
- Coin Change (Count Ways)
- Sequence of Sequence
- Santa Banta
- String Subsequence
- Mobile numeric keypad
- Gold Mine Problem
- Coin Change (Minimum Coins)
- Dice throw
- Perfect Sum Problem
- Smallest number
- Trail of ones
- Power Of 2 and Subsequences
- Kth Smallest Factor
- Longest subsequence-1
- Power Set
- Minimum Cost To Make Two Strings Identical
- Knapsack with Duplicate Items
- nCr
- Subsets with XOR value
- Geek and its Game of Coins
- Maximum path sum in matrix
- Minimum steps to destination
- Special Keyboard
- Partition Equal Subset Sum
- Min Coin
- Lucky alive person in a circle
- Count possible ways to construct buildings
- Count digit groupings of a number
- Probability of Knight
- Array Pair Sum Divisibility Problem
- Magic Triplets
- Brain Game
- Money Distributions
- Find Last Digit Of a^b for Large Numbers
- Matchsticks game
- Killing Spree
- N Digit numbers with digits in increasing order
- Yes XOR No
- Number of paths
- Nth Natural Number
- Knight Walk
- Permutation with Spaces
- Number of paths in a matrix with k coins
- Choose and Swap
- Count Total Setbits
- Sum of Query II
- Jumping Numbers
- Party in Town
- Game with String
- Count even length
- Numbers with alternative 1's
- Find the Safe Position
- Dudeney's Cow Problem
- Next Permutation
- Element left after performing alternate OR & XOR operation
- Smaller on Left
- Maximum sum of hour glass
- Nitika and her queries
- How Many X's?
- Exit Point in a Matrix
- Longest Repeating Subsequence
- Rotate Each Row of Matrix K Times
- Total Decoding Messages
- Stream First Non-repeating
- Villain Con
- Possible paths
- Segregate even and odd nodes in a Linked List
- Print leaf nodes from preorder traversal of BST
- Number of Rectangles in a Circle
- Tricky Subset Problem
- Rat Maze With Multiple Jumps
- Easy Query
- Snake and Ladder Problem
- Geek and Strings
- Pairs of Non Coinciding Points
- The Smurfs
- Satisfy the equation
- 7 Segment Display
- Product of Primes
- Eulerian Path in an Undirected Graph
- Transitive closure of a Graph
- Replace O's with X's
- nCr mod M | Part 2
- Two odd Occuring
- Rohan's Love for Matrix
- Check Mirror in N-ary tree
- Queries on Strings
- Special Matrix
- Queries on a Matrix
- Broken blocks
- Traverse All Edges And Vertices
- Find the string in grid
- Nodes at even distance
- Biconnected Graph
- Help a Thief!!!
- Count the paths
- Floyd Warshall
- Negative weight cycle
- Flood fill Algorithm
- Form coils in a matrix
- Techfest and the Queue
- Largest subsquare surrounded by X
- Shortest Source to Destination Path
- Divisibility tree
- Base Equivalence
- Maximum sum Rectangle
- Shortest Path between Cities
- Moving on grid
- Height Using Parent Array
- Reverse Spiral Form of Matrix
- Geek and Number String
- Save Your Life
- Image Multiplication
- Hamiltonian Path
- Recursively Remove Adjacent Duplicates
- Theft at World Bank
- Number of minimum picks to get 'k' pairs of socks from a drawer
- Spiral Matrix
- Valid Pair Sum
- Dam of Candies
- Transfiguration
- Repeated String Match
- Ruling Pair
- Triplets in Sorted Linked List
- Help Classmates
- Restricted Pacman
- Lucy's Neighbours
- Spidey Sense
- Project Manager
- Escape the Forbidden Forest
- Jump Game
- Iterative Inorder
- Triplets with sum with given range
- Preorder traversal (Iterative)
- Iterative Postorder
- Subset Sum Problem
- Form a palindrome
- Search Pattern (Z-algorithm)
- Bellman-Ford
- Partition a Linked List around a given value
- Capacity To Ship Packages Within D Days
- Coin Piles
- Rearrange characters
- Distribute N candies among K people
- Remove K Digits
- Substrings of length k with k-1 distinct elements
- 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
- Number of Provinces
- Prefix match with other strings
- Maximum sum leaf to root path
- Find duplicate rows in a binary matrix
- Maximum GCD of siblings of a binary tree
- BST to max heap
- Find rectangle with corners as 1
- Paths from root with a specified sum
- Shortest Prime Path
- Division without using multiplication, division and mod operator
- Insertion Sort for Singly Linked List
- Minimize the Heights I
- Subsets
- Flatten binary tree to linked list
- Rank The Permutations
- IPL 2021 - Match Day 2
- IPL 2021 - Match Day 4
- Unique Number III
- All Unique Permutations of an array
- Course Schedule
- Find and Replace in String
- Clone an Undirected Graph
- Target Sum
- Minimum times A has to be repeated such that B is a substring of it
- Bitwise AND of the Array
- Overlapping Intervals
- Bitwise AND of the Array
- Longest Possible Route in a Matrix with Hurdles
- Even Swap
- Reverse a Stack
- Farthest number
- Maximum product subset of an array
- Robots
- K-th Largest Sum Contiguous Subarray
- Hit most Balloons
- Maximum Meetings in One Room
- Enemy
- Buy Maximum Stocks
- Concatenate Equal to Target
- Exactly one swap
- Maximum Winning score
- Compute Before Matrix
- Smallest sum contiguous subarray
- Array Removals
- Find shortest safe route in a matrix
- Minimum Cost to cut a board into squares
- Graph is Tree or Not
- Replace every element with the least greater element on its right
- Special Keyboard 2
- Maximum selections
- LCP
- Next element with greater frequency
- Sum of nodes within k distance from target
- Minimum increment/decrement to make array non-Increasing
- Check if all levels of two trees are anagrams or not
- Number of Distinct Islands
- Shortest Distance in a Binary Maze
- Minimum Multiplications to reach End
- Number Of Enclaves
- Eventual Safe States
- City With the Smallest Number of Neighbors at a Threshold Distance
- Number Of Islands
- Maximum Multiple
- Number of Ways to Arrive at Destination
- Path With Minimum Effort
- Cheapest Flights Within K Stops
- Shortest Path in Undirected Graph
- Shortest path in Directed Acyclic Graph
- Aggressive Cows
- Combination Sum II
- Minimum days to make M bouquets
- Task Scheduler
- Minimum Absolute Difference In BST
- Maximum Sum Combination
- Insert Interval
- Count Number of Nodes in a Binary Tree
- Partitions with Given Difference
- Floor in BST
- Maximum Value
- Shortest Prime Path
- Next Greater Element in Circular Array
- Geeks And The String
- Find the longest string
- Maximum Profit By Choosing A Subset Of Intervals
- Minimum repeat to make substring
- Walls Coloring
- Water the plants
- Unique Paths in a Grid
- Best Node
- Knight in Geekland
- Shy Geek
- Count Special Numbers
- Minimum Steps Required
- Maximum Possible Value
- Yet another query problem
- Powerful Integer
- Max Coins
- Subtree In N-ary Tree
- Add Minimum Characters
- Count Total Setbits
- Tree Transformation
- Modify Linked List-1
- Remove the balls
- Fraction pairs with sum 1
- New Year Resolution
- Grinding Geek
- Flatten BST to sorted list
- Last Fairy Standing
- Minimize the Difference
- Pairs violating the BST property
- Kth common ancestor in BST
- Binary Tree to DLL
- Max rectangle
- Subtraction in Linked List
- Distinct occurrences
- Alien Dictionary
- Smallest range in K lists
- AVL Tree Deletion
- Merge Sort on Doubly Linked List
- Nodes at given distance in binary tree
- Fixing Two nodes of a BST
- Max Path Sum 2 Special Nodes
- Number of Turns in Binary Tree
- String Permutations
- Trapping Rain Water
- Max Circular Subarray Sum
- Smallest window containing all characters of another string
- Histogram Max Rectangular Area
- Max of min for every window size
- Find median in a stream
- Solve the Sudoku
- Minimum Cost Path
- Median of 2 Sorted Arrays of Different Sizes
- Next Smallest Palindrome
- Count Pairs in an Array
- The Painter's Partition Problem-II
- Distinct palindromic substrings
- Search Pattern (KMP-Algorithm)
- Count Smaller elements
- Number of distinct subsequences
- Circle of strings
- Longest repeating and non-overlapping substring
- Edit Distance
- Minimum Points To Reach Destination
- Palindromic Partitioning
- Stock Buy and Sell – Max K Transactions Allowed
- Check Tree Traversal
- Matrix Chain Multiplication
- Strictly Increasing Array
- Median in a row-wise sorted Matrix
- Very Tough Problem
- Kill Captain America
- Generalised Fibonacci numbers
- Boolean Parenthesization
- Longest valid Parentheses
- Bike Racing
- Possible Paths in a Tree
- Brackets in Matrix Chain Multiplication
- Joey doesn't share food
- nCr mod M | Part 1
- Adventure in a Maze
- Closest Palindrome
- Optimal binary search tree
- Longest Path in a matrix
- Akku and Arrays
- Word Wrap
- Hexadecimal to decimal counter
- Create your own Calculator
- Let's Play!!!
- Water Connection Problem
- Find the Maximum Flow
- Secret Cipher
- Corona Vaccine
- Shortest Range In BST
- Elixir of Life
- Longest substring to form a Palindrome
- Find all Critical Connections in the Graph
- Word Break (Trie)
- Minimum operations to convert array A to B
- Sorted Linked List to BST
- Longest Increasing Path in a Matrix
- Palindrome Pairs
- Array Partition
- Count occurrences of a given word in a 2-d array
- Number of distinct words with K maximum contiguous vowels
- Reverse a sublist of a linked list
- Word Ladder II
- Distribute candies in a binary tree
- Shortest Unique prefix for every word
- IPL 2021 - Final
- Find number of closed islands
- Count the number of subarrays
- Find the String
- Kth Smallest Number in Multiplication Table
- Rearrange the array
- Stock Buy and Sell – Max 2 Transactions Allowed
- Min Chars to Add for Palindrome
- Maximum difference between pair in a matrix
- Geek in a Maze
- K Centers Problem
- Minimize Max Distance to Gas Station
- LFU cache
- Candy
- Account Merge
- Maximum XOR With an Element From Array
- Chocolates Pickup
- Count Lucky Permutations
- Minimum Number Of Sprinkler
- Greater or Less
- 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
- Geekina Hate 1s
- Making A Large Island
- Rotate Array
- Sort String
- Print Linked List
- Count Linked List Nodes
- Size of Binary Tree
- Count Leaves in Binary Tree
- Postorder Traversal
- Implement stack using array
- Queue Using Array
- Replace all 0's with 5
- Preorder Traversal
- 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
- Equal Sum and XOR
- C++ STL | Set 8 (unordered set)
- Peak element
- Linked List Insertion At End
- Minimum element in BST
- Anagram of String
- Is Linked List Length Even?
- Identical Linked Lists
- Modular Node
- Sum of Binary Tree
- Insert in Middle of Linked List
- Pairwise Consecutive Elements
- Sort and Reverse Vector
- Front to Back
- Stack designer
- Queue Push & Pop
- Set Operations
- Map Operations
- Bit Difference
- Print 1 To N Without Loop
- Array Search
- Sorted Array Search
- Binary Array Sorting
- Binary String
- Reverse a String
- First n Fibonacci
- Binary Array Sorting
- C++ Hello World
- Sum of Array
- Searching in an Array
- Doubling the value
- Count pair sum
- Print Elements of Array
- Balanced Array
- At least two greater elements
- Maximum product of two numbers
- Value equal to index value
- Convert a list of characters into a String
- Odd to Even
- Fighting the darkness
- Immediate Smaller Element
- Swap kth elements
- Lower case to upper case
- First 1 in a Sorted Binary Array
- Max and Min Product from 2 Arrays
- Display longest name
- Find element at a given Index
- Largest Element in Array
- Rotate Array by One
- Game with nos
- Ishaan Loves Chocolates
- Array Subset
- Minimum number to form the sum even
- Count of smaller elements
- Min and Max in Array
- Multiply left and right array sum
- Convert String to LowerCase
- Addition of Two Numbers
- 1s Complement
- Odd or Even
- Check set bits
- One's Complement
- XOR of all elements
- The OR Gate
- The AND Gate
- Find position of set bit
- Set kth bit
- Set the rightmost unset bit
- Factor OR Multiple
- The XOR Gate
- Combinational Logic
- Change all even bits in a number to 0
- XOR Count Zero and One
- set-bits and number
- Small Factorial
- House Robber
- Mean of an Array
- Maximum Area
- C++ Sets
- Find n-th term of series 1, 3, 6, 10, 15, 21
- Binary Shift to Divide
- Krishnamurthy number
- Find N-th term in the series
- Factorial
- Parity of unsigned integer
- Reverse digits
- Series AP
- Floyd's triangle
- Divide the number
- Multiplication Table
- The dice problem
- Print 1 to n without using loops
- Disarium Number
- Count Squares
- Anshuman's Favourite Number
- Mind Game
- Print the Kth Digit
- Swap two numbers
- Half N by M
- Sorted matrix
- Max Min
- Time Travel
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