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BASIC (16)
EASY (71)
MEDIUM (205)
HARD (37)
Rotate Array
Replace all 0's with 5
Sum Except First and Last
Anagram of String
Binary Array Sorting
Swap kth elements
Repeated Character
First 1 in a Sorted Binary Array
Elements in the Range
Game with nos
One odd Occuring
Ishaan Loves Chocolates
1s Complement
Find position of set bit
Binary number to decimal number
Max Min
Add 1 to a Linked List Number
Quick Sort on Linked List
QuickSort on Doubly Linked List
Count BST nodes that lie in a given range
Merge Sort
Merge two sorted linked lists
Add all greater values to every node in a BST
Diagonal Tree Traversal
Maximum difference between node and its ancestor
Binary Heap Operations
Merge K sorted linked lists
Find the number of islands
Generate IP Addresses
Check if subtree
Dijkstra Algorithm
Largest BST
Count Palindromic Subsequences
Bipartite Graph
Pots of Gold Game
Longest Palindrome in Linked List
Bridge edge in a graph
Find triplets with zero sum
Polynomial Addition
Delete nodes greater than k
Complete Binary Tree
Counting elements in two arrays
Construct expression tree
Foldable Binary Tree
Leaves to DLL
Find length of Loop
Swap Kth nodes from ends
Maximum Non-Adjacent Nodes Sum
Ceil in BST
Wave Array
Possible Words From Phone Digits
Rearrange an array with O(1) extra space
Rotate Array
Kadane's Algorithm
Majority Element
Binary Array Sorting
Possible paths between 2 vertices
Unit Area of largest region of 1's
Subarrays with equal 1s and 0s
Case-specific Sorting of Strings
Postfix Evaluation
Minimum Cost of ropes
Unique Subsets
M-Coloring Problem
Egg Dropping Puzzle
Preorder to BST
X Total Shapes
Find whether path exist
Rotten Oranges
Steps by Knight
Count subsequences of type a^i, b^j, c^k
Rotate by 90 degree
Excel Sheet | Part - 1
Sort 0s, 1s and 2s
Equivalent Sub-Arrays
Pair Sum Closest to 0
Smallest number with at least n trailing zeroes in factorial
Maximize The Array
Super Primes
Maximum Product Subarray
Longest subarray with sum divisible by K
Form a palindrome
Nuts and Bolts Problem
Longest Subarray with Sum K
Next Smaller Element
Transform String
Number of positive integral solutions
Sum of two large numbers
Reverse each word in a given string
Remove leading zeros from an IP address
k largest elements
Magnet Array Problem
Smallest distinct window
Integer to Words
String formation from substring
Minimum swaps and K together
Smallest Absolute Difference
LCS of three strings
First negative in every window of size k
Reaching the heights
Smaller on Left
Maximum Product of Increasing Subsequence of Size 3
Nine Divisors
Valid Substring
Previous number in one swap
Friends Pairing Problem
Lexicographically smallest string
Coin Change (Minimum Coins)
Power Of 2 and Subsequences
Kth Smallest Factor
Firing employees
Number of ways
Subsets with XOR value
XOR Game
Min Coin
Handshakes
Count possible ways to construct buildings
Probability of Knight
Brain Game
Find Last Digit Of a^b for Large Numbers
Killing Spree
N Digit numbers with digits in increasing order
Fill the Tank
Knight Walk
Permutation with Spaces
Choose and Swap
Return two prime numbers
Fact Digit Sum
Party in Town
Find the Safe Position
Next Permutation
Smaller on Left
Geek and knots
Matrix Exponentiation
Composite and Prime
Finding Profession
Villain Con
Rat Maze With Multiple Jumps
Geek and Strings
Pairs of Non Coinciding Points
7 Segment Display
Product of Primes
Eulerian Path in an Undirected Graph
Find all distinct subset (or subsequence) sums
Check Mirror in N-ary tree
Queries on Strings
Special Matrix
Queries on a Matrix
Broken blocks
Shortest Uncommon Subsequence
Nodes at even distance
Biconnected Graph
Help a Thief!!!
Count the paths
Negative weight cycle
Array to BST
Form coils in a matrix
Shortest Path between Cities
Moving on grid
Height Using Parent Array
Geek and Number String
Recursively Remove Adjacent Duplicates
Theft at World Bank
Coins of Geekland
Triplets in Sorted Linked List
Help Classmates
Spidey Sense
Escape the Forbidden Forest
Jump Game
Triplets with sum with given range
Form a palindrome
Bellman-Ford
Partition a Linked List around a given value
Capacity To Ship Packages Within D Days
Coin Piles
Substrings of length k with k-1 distinct elements
Clone a stack without using extra space
Count pairs in array divisible by K
Number of Provinces
Binary Matrix with at most K 1s
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
BST to greater sum tree
Find rectangle with corners as 1
Cousins of a given node
Sort for Singly Linked List
Subsets
Flatten binary tree to linked list
Rank The Permutations
Connect Nodes at Same Level
Minimize number of Students to be removed
IPL 2021 - Match Day 2
Find and Replace in String
Minimum times A has to be repeated such that B is a substring of it
Bitwise AND of the Array
Maximum number of events that can be attended
Longest Possible Route in a Matrix with Hurdles
Farthest number
Robots
Hit most Balloons
Concatenate Equal to Target
Exactly one swap
Maximum Winning score
Compute Before Matrix
Levels Of Game
Smallest sum contiguous subarray
Minimum Cost to cut a board into squares
Validate Stack Operations
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
Minimum Swaps
Number of Distinct Islands
Number Of Islands
Merging Details
Number of Ways to Arrive at Destination
Geek and New Job
Left View of Binary Tree
Find Transition Point
Queue using two Stacks
Josephus problem
Reverse Using Stack
Next Right Node
Find n/k th node in Linked list
Maximum Pairwise Computed Value
Reverse first K of a Queue
Move all zeros to the front of the linked list
Controlled_Printing
Coding with Operators
Get min at pop
Minimum Number in a sorted rotated array
Anagram
Reverse Words
Largest number with given sum
Union-Find
Positive Negative Pair
Missing And Repeating
Maximize sum after K negations
Sum of elements between k1'th and k2'th smallest elements
Min sum formed by digits
Bitonic Point
Alternate Positive Negative
Rearrange a string
Number of occurrence
Longest Common Prefix of Strings
Counts Zeros Xor Pairs
Hungry Pizza Lovers
Maximum sum of increasing order elements from n arrays
Count the Zeros
Merge two binary Max heaps
Maximum average subarray
Smallest greater elements in whole array
Fitting The Array
Shop in Candy Store
Partition a number into two divisible parts
Encrypt the string - 2
Adding Array Elements
Change Bits
The Bit Game
Swap bits
Nth item through sum
Tom and Jerry
Help Ishaan
Help the Old Man!!!
Print the pattern
K-Ary Tree
Minimum Exchange
Count all possible paths from top left to bottom right
Rearrange Geek and his Classmates
Modified Numbers and Queries
Fraction Trouble
Gadgets of Doraland
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
Geek and Snow Fighting
License Key Formatting
Find all possible paths from top to bottom
Smallest Subset with Greater Sum
Minimum Sum of Absolute Differences of Pairs
Smallest window containing 0, 1 and 2
Can Make Triangle
Matrix Operations
Find pairs with given sum in doubly linked list
Triangle and Square
Binary Tree to DLL
Partition array to k subsets
Number of Turns in Binary Tree
Distinct palindromic substrings
Count Smaller elements
Largest rectangle of 1s with swapping of columns allowed
Maximum XOR subset
Kill Captain America
Bike Racing
Word Break - 2
Brackets in Matrix Chain Multiplication
nCr mod M | Part 1
Adventure in a Maze
Closest Palindrome
Optimal binary search tree
Assignment Problem
Longest Path in a matrix
Word Wrap
Maximum sum Rectangle
Huffman Encoding
Find the Maximum Flow
Secret Cipher
Corona Vaccine
Shortest Range In BST
Search Pattern (Z-algorithm)
Longest substring to form a Palindrome
Minimum X (xor) A
Sorted Linked List to BST
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
Shortest Unique prefix for every word
Kth Smallest Number in Multiplication Table
Min Chars to Add for Palindrome
Geek in a Maze
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