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SCHOOL (7)
BASIC (272)
EASY (292)
MEDIUM (101)
HARD (7)
- Sorting Elements of an Array by Frequency
- Last two digits of Fibonacci
- Shivani hates Consecutive numbers
- Pattern Matcher
- Pick the one
- Unit Digit
- Rotate a Linked List
- Sort a linked list of 0s, 1s and 2s
- Add 1 to a Linked List Number
- Detect Loop in linked list
- Count BST nodes that lie in a given range
- Check for BST
- Delete without head pointer
- Intersection in Y Shaped Lists
- Merge two sorted linked lists
- Sum Tree
- Connect Nodes of Levels
- Stack using Queue
- Implement stack using array
- Two Stacks in an Array
- The Celebrity Problem
- Remove loop in Linked List
- Implement Atoi
- Maximum Difference
- Palindrome Linked List
- Count distinct elements in every window
- Level order traversal
- Peak element
- Occurences of 2 as a digit
- Children Sum in a Binary Tree
- Find length of Loop
- SPP - The Pattern
- Cat and Hat
- Nearest Power
- Doge
- Extract the image
- Fibonacci Objects
- Frequency of Speaking
- Count set bits
- Gray to Binary Conversion
- Reverse array in groups
- Smallest Positive Missing
- Power Of Numbers
- Wave Array
- Rearrange Array Alternately
- Rearrange an array with O(1) extra space
- Kadane's Algorithm
- Majority Element
- Binary Array Sorting
- Count Inversions
- Indexes of Subarray Sum
- Spirally traversing a matrix
- Rotate by 90 degree
- Case-specific Sorting of Strings
- Postfix Evaluation
- Kth smallest element
- Egg Dropping Puzzle
- Sort according to an Array
- Most frequent word in an array of strings
- Container With Most Water
- Word Break
- Excel Sheet | Part - 1
- Sort 0s, 1s and 2s
- Maximum Sub Array
- Pascal Triangle
- Maximum Index
- Sum of Middle elements of two sorted arrays
- Single Among Doubles in a Sorted
- Consecutive 1's not allowed
- Count Occurences of Anagrams
- Single Among Doubles
- Pythagorean Triplet
- Search in Rotated Sorted Array
- Count pairs Sum in matrices
- Sum of bit differences
- Form the Largest Number
- Add Binary Strings
- Sort in specific order
- Nuts and Bolts Problem
- Rotate a Matrix
- Next Smaller Element
- Sum of two large numbers
- Reverse each word in a given string
- k largest elements
- Look and Say Pattern
- Product Pair
- Integer to Words
- K-th element of two Arrays
- Missing element of AP
- Palindrome in Alphanumeric String
- Unique Number II
- Modular Exponentiation
- 3 Divisors
- Sieve of Eratosthenes
- Number of paths
- Return two prime numbers
- Find nth root of m
- Find Prime numbers in a range
- Multiply 2 matrices
- How Many X's?
- Segregate even and odd nodes in a Linked List
- Sahil loves gfg
- Sahil love good scorer
- Catch The Nun
- Golden String
- Geek String
- Check XOR
- Weigh the strings
- Adjacent Equal
- Power of Number
- Geek and New Job
- Reverse a linked list
- Frequency in a Linked List
- Pairwise swap elements of a linked list
- Node at a given index in linked list
- Linked list of strings forms a palindrome
- Remove duplicates from an unsorted linked list
- Delete in a Doubly Linked List
- Inorder Traversal
- Reverse a Doubly Linked List
- Bubble Sort
- Selection Sort
- Right View of Binary Tree
- K distance from root
- Mirror Tree
- Maximum Width of Tree
- Height of Binary Tree
- Kth from End of Linked List
- Middle of a Linked List
- Check If Circular Linked List
- Left View of Binary Tree
- Find Transition Point
- Queue using two Stacks
- Remove Duplicates from a Sorted Linked List
- Postorder Traversal
- Stack using Linked List
- Identical Trees
- Square Root
- Binary Search
- BST Keys in a Range
- Equilibrium index of an array
- Remove every k'th node
- Third largest element
- Convert to Roman No
- C++ STL | Set 2 (pair)
- Search a node in BST
- Delete in a Singly Linked List
- Minimum distance in an Array
- Array Duplicates
- Special Stack
- Index of an Extra Element
- Sum of given range
- Minimum element in BST
- Max and min element in Binary Tree
- Reverse Using Stack
- Full Binary Tree
- Delete Alternate Nodes
- Count Pairs whose sum is equal to X
- Maximum Pairwise Computed Value
- Queue Reversal
- Reverse first K of a Queue
- Sum of Leaf Nodes
- Rotate doubly Linked List
- Product of an Array
- C++ Function overloading
- SP - Digit Sum
- SPP - Second Highest
- The New Line
- Controlled_Printing
- Coding with Operators
- Bridge of Stones
- Data Types
- 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
- Exists or Not?
- The Loner
- Swap the array elements
- Count the Specials
- Matrix Interchange
- Predict the Column
- Xoring and Clearing
- Consonants and Vowels check
- Even Subsets
- Almost Equal
- The Pattern Matcher
- Swap values using References
- Structs and Objects
- Two Dimensional World
- Learning Structs
- Delete Array
- Find the Frequency
- Back to Front
- Pair Sum in Vector
- Student of the Year
- Deque Implementations
- Repetitive Printing - Python
- Operators in Python
- Split the input - Python
- Comment in Python
- Logical Operators - Python
- Increment and Decrement - Python
- Bitwise Operators - Python
- If conditional statement- Python
- Check the status - Python
- Mark Even and Odd - Python
- For loop - Python
- For Loop 2- Python
- While loop in Python
- Jumping through While - Python
- Slicing in String - Python
- Repeat the Strings - Python
- Regular Expressions 2 - Python
- String Functions - II - Python
- String Functions I - Python
- Intro to Lists - Python
- Count Even Odd - Python
- Functions in Lists - Python
- Classes and Objects - Python
- Average_Min_Max - Python
- Sorting in Lists - Python
- Mean Finder
- Intro to Dictionary - Python
- Neighbour of 10
- Dictionary in Python - II
- Dictionary in Python - III
- Set in Python - I
- Deep Copy objects
- Set in Python - II
- List Average
- Unique number
- Lonely Number
- Is and In Operator
- sep and end in Print()
- Modules
- Decimal to binary
- First Set Bit
- Rightmost different bit
- Check K-th Bit
- Longest Consecutive 1's
- Power of 2
- Swap odd and even bits
- Frequencies in a Limited Array
- Equilibrium Point
- Array Leaders
- Floor in a Sorted Array
- Print Matrix in snake Pattern
- Transpose of Matrix
- Check if a string is Isogram or not
- Anagram
- Winner of an election
- Reverse Words
- Sum of numbers in string
- Minimum indexed character
- Non Repeating Character
- Parenthesis Checker
- Generate Binary Numbers
- First Repeating Element
- Check Equal Arrays
- Missing in Array
- Product array puzzle
- Excel Sheet | Part - 2
- Buildings receiving sunlight
- Find Index
- Non-Repeating Element
- Max value
- Find the closest number
- Professor and Parties
- Pairs which are Divisible by 4
- First Come First Serve
- Greedy Fox
- Sorted and Rotated Minimum
- Maximum no of 1's row
- Search in a Row-Column sorted matrix
- String Duplicates Removal
- Min sum formed by digits
- Missing number
- Chocolate Distribution Problem
- Part Sort
- Fascinating Number
- Bitonic Point
- Find Duplicate Element
- Left most and right most index
- Sort Array II
- Single Number
- Maximum Possible Sum of Products
- 1[0]1 Pattern Count
- Remaining String
- Remove b and ac from a given string
- Count Alphabets
- Rearrange a string
- Form largest number from digits
- Remove Duplicates
- Compete the skills
- Sorting Employees
- Facing the sun
- Greater on right side
- Twice Counter
- Second Largest
- Two Sum - Pair with Given Sum
- Rearrange to Make arr[i] = i
- Number of occurrence
- Average of Prefix
- The Even Array
- Find the left over element
- Modify the Array
- Pair the minimum
- Check if array is sorted
- Find missing in second array
- Longest Common Prefix of Strings
- Largest Fibonacci Subsequence
- First Repeated Character
- Prime String
- Counts Zeros Xor Pairs
- Two sum -Pairs with 0 Sum
- Sum of f(a[i], a[j]) over all pairs in an array of n integers
- Segregate 0s and 1s
- Maximum number of zeroes
- Play With OR
- At Least K Occurrences
- Element with left side smaller and right side greater
- Count the Zeros
- The Counting Game !!
- First and Second Smallests
- Palindrome String
- Missing ranges of numbers
- Chocolate Station
- Fitting The Array
- K-th missing element
- Pair with given sum in a sorted array
- Pattern Searching
- Minimum changes to make all substrings distinct
- Is Binary Number Multiple of 3
- Karatsuba Algorithm
- Number of 1 Bits
- Find the Highest number
- Check if a Integer is power of 8 or not
- Nth Fibonnaci Last Digit
- Armstrong Numbers
- Midori and chocolates
- Love For The Twins
- Pairs with Positive Negative values
- Set Bits
- Reverse Bits
- Max Sum Subarray of size K
- Nth Fibonacci Number
- Change Bits
- Swap two nibbles in a byte
- Number of factors
- Count Digits
- Sum Of Digits
- Palindrome
- Toggle bits in the given range
- Game of Nim
- Element that appears once where every element occurs twice
- Prime Number
- Party of Couples
- Compute (a*b)%c
- Find sum of divisors
- Element in a Sequence
- Amicable Pair
- Largest power of prime
- Nearest Perfect Square
- Minimum number of Coins
- Number Of Open Doors
- Perfect Numbers
- Maximum height of the staircase
- Next in Series
- Maximize Toys
- Penalty Shooters
- Squares in N*N Chessboard
- Number of divisors in a given range
- Form a number divisible by 3 using array digits
- Sum of all prime numbers between 1 and n
- Series GP
- Total number of Strings
- Triangular Number
- Sum of First N Natural Numbers
- Sum of product of all pairs
- Maximum Diamonds
- Row with Minimum 1s
- Geek and his Tricky Series
- Print Pattern
- Print Diagonally
- Geek and Snow Fighting
- Geek and Co-Prime Numbers
- Rotate Array
- Sort String
- Print Linked List
- Find Length of Linked List
- Check for Binary String
- Size of Binary Tree
- 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
- Count zeros in a sorted matrix
- Print number pattern
- Preorder Traversal
- First Occurence
- C++ STL | Set 1 (vector)
- C++ STL | Set 3 (map)
- Middle Pattern
- C++ STL | Set 6 (set)
- Equal Sum and XOR
- C++ STL | Set 8 (unordered set)
- Palindromic Array
- Multiply Matrices
- Linked List Insertion At End
- Increment a variable
- C++ Functions (Sum of numbers) | Set 1
- Circular Linked List Traversal
- Is Linked List Length Even?
- Identical Linked Lists
- Sum of Binary Tree
- C++ Classes Introduction
- Alternates in an Array
- C++ Inheritance introduction
- C++ Call by reference
- Start Coding
- The Size of
- Logical Operators
- Count Odd and Even
- Sort and Reverse Vector
- Front to Back
- Stack designer
- Queue Push & Pop
- Start Coding - Python
- Space Seperated - Python
- Concatenating Strings - Python
- Taking input and typecasting - Python
- Taking input - Python
- Comparison Operators - Python
- Zero Converter - Python
- Welcome aboard - Python
- Regex - Python
- Iterating through Lists - Python
- Functions - Python
- Variable Arguments - Python
- Anonymous Functions - Python
- Two digit Sum
- AweSum
- Copy the End
- KaBoom
- Lambda Sum
- Four and Four
- Sum of diagonals
- Bit Difference
- Number is sparse or not
- Array Search
- Binary String
- Remove common characters and concatenate
- Reverse a String
- Keypad typing
- First n Fibonacci
- C++ Hello World
- Find second largest element
- Palindrome Array
- Multiply Array
- Sum of Array
- Sum of Natural Numbers
- Searching in an Array
- Doubling the value
- Print Elements of Array
- Ishaan's Internship
- Remove consonants from a string
- Balanced Array
- At least two greater elements
- Anagram Palindrome
- Change the string
- Maximum product of two numbers
- Value equal to index value
- Check for subsequence
- Check String
- Convert a list of characters into a String
- Confused pappu
- Remove characters from alphanumeric string
- Count of camel case characters
- Fighting the darkness
- Count type of Characters
- Swap kth elements
- Reversing the vowels
- Rock Paper Scissors!
- Max-Min conversion
- Lower case to upper case
- Smaller and Larger
- Remove repeated digits in a given number
- Repeated Character
- Find the Number which contain the digit d
- The Penalty Shootout
- Elements in the Range
- Display longest name
- Find element at a given Index
- Last index of One
- Making elements distinct
- Upper Case Conversion
- URLify a given string
- Sort the string in descending order
- Merge two strings
- Crazy String
- String with numbers at its end
- Countries at war
- Last duplicate element in a sorted array
- Largest Element in Array
- Rotate Array by One
- Game with nos
- One odd Occuring
- Ishaan Loves Chocolates
- Jay's Apples
- Split Strings
- Array Subset
- Rotating an Array
- Product is even or odd?
- Remove Duplicates from unsorted array
- Minimum number to form the sum even
- C++ Strings
- Count of smaller elements
- Min and Max in Array
- Reducing Walls
- Multiply left and right array sum
- Average Count Array
- Pattern of Strings
- Extract Maximum
- Perfect Square String
- Remove character
- Triangle growing downwards
- GCD of Array
- GCD of two numbers
- Find unique element
- C++ if-else (Decision Making)
- Addition of Two Numbers
- C++ Input / Output
- 1s Complement
- Odd or Even
- Check set bits
- C++ Operators (Relational) | Set 2
- C++ Switch Case Statement
- One's Complement
- Number of Diagonals
- XOR of all elements
- Invert the Bits
- C++ Operators | Set 1 (Arithmetic)
- The OR Gate
- The AND Gate
- Gray Code
- Binary representation
- Check for Power
- Even Odd Sum
- Find position of set bit
- Set kth bit
- Factor OR Multiple
- Vowel or Not
- The XOR Gate
- Combinational Logic
- Java Hello World
- Number Series
- Smallest power of 2 greater than or equal to n
- XOR Count Zero and One
- Find the fine
- Strong Numbers
- Set all odd bits
- Check perfect square
- LCM And GCD
- Small Factorial
- House Robber
- Mean of an Array
- Cube root of a number
- Repeated IDs
- C++ Data Types
- Find n-th term of series 1, 3, 6, 10, 15, 21
- Check perfect square
- Fibonacci to N
- Krishnamurthy number
- Median of an Array
- Celsius to Fahrenheit Conversion
- Ishaan's Sum Problem
- Factorial
- Automorphic Number
- Sum of odd and even elements
- Number of divisors
- Parity of unsigned integer
- Sum of Digit is Palindrome or not
- Perfect Number
- Sum of an AP
- Greatest of three numbers
- Sum of GP
- Simple Interest
- Reverse digits
- Special Odd Series Sum
- Special Series Sum
- Difference series
- Power of Pow | Even Number
- Power of Pow | Odd Numbers
- Binary number to decimal number
- Series AP
- Find The Sequence
- Common Divisors
- Floyd's triangle
- Distance between 2 points
- Multiples Power
- Area of Rectangle, Right Angled Triangle and Circle
- Sum of elements in a matrix
- Check if the door is open or closed
- Chocolate lengths
- Identical Matrices
- Find difference between sum of diagonals
- Is digital root of N a prime?
- C++ 2-D Arrays | Set-1
- Jumpy Ball
- Multiplication Table
- The dice problem
- G.F Series
- Remainder Evaluation
- Pattern Printing
- Print 1 to n without using loops
- Count Squares
- Matching Pair
- Middle of Three
- Difference between sums of odd and even digits
- Anshuman's Favourite Number
- Repeated sum of digits
- Mind Game
- Print the Kth Digit
- Swap two numbers
- Series X1
- Number Pattern
- Buy chocolates and save N rupees
- Doctors Clinic
- 12 hour clock addition
- The Modulo Task
- Composite Series
- Convert from any base to decimal
- Repetitive Addition Of Digits
- Half N by M
- Pairs of prime number
- Pattern Jumping
- Corner Digits Sum
- Sum Palindrome
- Sum Terms Nth Row
- Geek's Weight
- Minimum difference pair
- The Lazy Caterer's Problem
- Dull Jack
- Surface Area and Volume of Cuboid
- Finding Position
- nPr
- Determine focal length of a spherical mirror
- Parallel or Perpendicular?
- Cricket Average
- Addition of two square matrices
- Diagonal sum
- Sum of primes
- Encoding names
- Pattern-1
- Repeated Sum and then Multiply
- C++ | A Speed Breaker