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BASIC (13)
EASY (45)
MEDIUM (67)
HARD (5)
Sort a linked list of 0s, 1s and 2s
Add 1 to a Linked List Number
Detect Loop in linked list
Intersection in Y Shaped Lists
Directed Graph Cycle
Undirected Graph Cycle
Two Stacks in an Array
The Celebrity Problem
Max sum in the configuration
Minimum Swaps to Sort
Implement Atoi
Palindrome Linked List
Rat in a Maze Problem - I
Delete keys in a Linked list
Top View of Binary Tree
Find Common Nodes in two BSTs
Polynomial Addition
Arrange Consonants and Vowels
Tower Of Hanoi
Rearrange Array Alternately
Kadane's Algorithm
Count Inversions
Indexes of Subarray Sum
Spirally traversing a matrix
Subarray with 0 sum
Stock span problem
Next Greater Element
Job Sequencing Problem
Minimum Platforms
Stickler Thief
Ways to Reach the n'th Stair
0 - 1 Knapsack Problem
Kth Smallest
Shortest Common Supersequence
Count subsequences of type a^i, b^j, c^k
4 Sum - All Quadruples
Sort 0s, 1s and 2s
Consecutive 1's not allowed
Painting the Fence
Marks of PCM
Longest Subarray with Sum K
Max Sum without Adjacents
Reverse each word in a given string
Rod Cutting
Minimum swaps and K together
LCS of three strings
Maximum difference of zeros and ones in binary string
Minimum number of deletions
Friends Pairing Problem
Game of XOR
Minimum number of deletions and insertions
Gold Mine Problem
Perfect Sum Problem
Maximum path sum in matrix
Partition Equal Subset Sum
Count the number of ways to tile the floor of size n x m using 1 x m size tiles
Subset Sums
Number of paths
Exit Point in a Matrix
Longest Repeating Subsequence
Subarrays with sum K
Minimize the Heights I
Next Greater Element
Maximum Meetings in One Room
Buy Maximum Stocks
Array Removals
Count Subarrays with given XOR
Reverse a linked list
Pairwise swap elements of a linked list
Remove duplicates from an unsorted linked list
Split a Linked List into two halves
Right View of Binary Tree
Height of Binary Tree
Middle of a Linked List
Check If Circular Linked List
Left View of Binary Tree
Intersection Sorted Linked Lists
Remove Duplicates from a Sorted Linked List
DFS of Graph
Implement stack using array
BFS of graph
Nodes without a Sibling
Largest subarray of 0's and 1's
Full Binary Tree
Find length of Loop
Sum of Leaf Nodes
Sum of Right Leaf Nodes
Rightmost different bit
Check K-th Bit
Swap odd and even bits
Equilibrium Point
Array Leaders
Roof Top
Panagram Checking
Parenthesis Checker
N meetings in one room
Missing in Array
Product array puzzle
Missing And Repeating
Pairs with certain difference
Common in 3 Sorted Arrays
Find Pair Given Difference
Left most and right most index
Remove Duplicates
Find the left over element
Length of longest subarray
Number of 1 Bits
Max Sum Subarray of size K
Nth Fibonacci Number
Count numbers containing 4
Reach the Nth point
Print Pattern
Linked List Group Reverse
Subtraction in Linked List
Trapping Rain Water
Histogram Max Rectangular Area
Candy
Rotate Array
Alternates in an Array
First n Fibonacci
Perfect Array
Sum of Natural Numbers
Fighting the darkness
Last duplicate element in a sorted array
Ishaan Loves Chocolates
Multiply left and right array sum
Median of an Array
Tough Competitors
Absolute Difference of 1
Ways To Tile A Floor
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