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SCHOOL (4)
BASIC (71)
EASY (134)
MEDIUM (70)
HARD (4)
Reverse an Array
Search in a 2D Matrix
Arrays (Sum of array)
Swap The Numbers
Print Linked List
Count Linked List Nodes
Check for Binary String
Size of Binary Tree
Count Leaves in Binary Tree
Postorder Traversal
Implement stack using array
Queue Using Array
Replace all 0's with 5
Largest product
Preorder Traversal
Search a node in BST
Palindromic Array
Multiply Matrices
Peak element
Linked List Insertion At End
Play with an array
Minimum element in BST
Is Linked List Length Even?
Identical Linked Lists
Modular Node
Triplet Family
Sum of Binary Tree
Pairwise Consecutive Elements
Count Non-Leaf Nodes in Tree
Alternates in an Array
Stack designer
Print 1 To N Without Loop
Reverse array in groups
Sorted Array Search
Binary Array Sorting
Reverse a String
Keypad typing
First n Fibonacci
Minimum Product of k Integers
Palindrome Array
Count number of elements between two given elements in array
Sandwiched_Vowels
Sum of Array
Sum of Natural Numbers
Count pair sum
Print Elements of Array
At least two greater elements
Change the string
Value equal to index value
The problem of identical arrays
Immediate Smaller Element
Count the characters
Swap kth elements
Smaller and Larger
Repeated Character
Display longest name
Find element at a given Index
Largest Element in Array
Rotate Array by One
Exceptionally odd
Array Subset
Count of smaller elements
Min and Max in Array
Odd or Even
Set the rightmost unset bit
Combinational Logic
Sum Of Digits
Factorial
Sum of elements in a matrix
Identical Matrices
C++ 2-D Arrays | Set-1
G.F Series
Print 1 to n without using loops
Height of Heap
Addition of two square matrices
Node at a given index in linked list
Delete in a Doubly Linked List
Inorder Traversal
Check for BST
Right View of Binary Tree
K distance from root
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
Transform to Sum Tree
Find Transition Point
Remove Duplicates from a Sorted Linked List
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
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
Toeplitz matrix
Third largest element
Josephus problem
You and your books
Count Occurrence of digit k
Delete in a Singly Linked List
Minimum distance in an Array
Max Level Sum in Binary Tree
Three way partitioning
Level order traversal
Operating an array
Reverse Using Stack
Delete Alternate Nodes
Next Right Node
Depth of node
Find length of Loop
Leaf under budget
Find n/k th node in Linked list
Maximum Pairwise Computed Value
Queue Reversal
Remove Half Nodes
Height of Spiral Tree
Magical Number
Move all zeros to the front of the linked list
Delete Mid of a Stack
Find the Frequency
Power of 2
Equilibrium Point
Floor in a Sorted Array
Minimum Number in a sorted rotated array
Print adjacency list
Anagram
Strings Rotations of Each Other
Isomorphic Strings
Reverse Words
Non Repeating Character
Parenthesis Checker
Pattern searching
Union of Arrays with Duplicates
Check Equal Arrays
Missing in Array
Max Value Permutation
Find Index
Find Kth Rotation
Find the closest number
Professor and Parties
k sorted array
Balance with respect to an array
Common in 3 Sorted Arrays
First Come First Serve
Move All Zeroes to End
String Duplicates Removal
Missing number
Move all negative elements to end
String Manipulation
Find Pair Given Difference
Fascinating Number
Left most and right most index
Alternate Positive Negative
Compete the skills
Twice Counter
Word with maximum frequency
Second Largest
Number of occurrence
Average of Prefix
Find the left over element
Check if array is sorted
Substrings with same first and last characters
Two sum -Pairs with 0 Sum
At Least K Occurrences
Maximum sum of subarray less than or equal to x
Palindrome String
Empty The Tank
Find the Highest number
Max Sum Subarray of size K
Nth Fibonacci Number
Ceil The Floor
Party of Couples
Shortest path from 1 to n
Find nth root of m
Juggler Sequence
Sum of dependencies in a graph
Shortest distance in infinite tree
Search insert position of K in a sorted array
Binary Search in forest
Largest value in each level
First and last occurrences of x
Smallest window containing 0, 1 and 2
Move Last Element to Front of a Linked List
Print N to 1 without loop
Maximum Depth Of Binary Tree
Search in Linked List
Array to Linked List
Introduction to Trees
Binary Search Trees
Graph and Vertices
Binary Tree Representation
Maximum Weight Node
Find Bots on Geeklandster
Max Level Sum in Binary Tree
Add 1 to a Linked List Number
Bottom View of Binary Tree
Sum Tree
Tree Boundary Traversal
Reverse alternate levels of a perfect binary tree
Directed Graph Cycle
Undirected Graph Cycle
The Celebrity Problem
Topological sort
Dijkstra Algorithm
Palindrome Linked List
Count distinct elements in every window
Find triplets with zero sum
Top View of Binary Tree
Root to Leaf Paths
Diagonal sum in binary tree
Mother Vertex
Ceil in BST
Kadane's Algorithm
Indexes of Subarray Sum
Subarray with 0 sum
Stock span problem
K Sized Subarray Maximum
Nearly sorted
Fractional Knapsack
Minimum Jumps
Stickler Thief
Ways to Reach the n'th Stair
Longest Common Subsequence
0 - 1 Knapsack Problem
Kth Smallest
Shortest Common Supersequence
Top K Frequent in Array
Sort 0s, 1s and 2s
Longest subarray with sum divisible by K
Substrings with K Distinct
Form a palindrome
Max Sum without Adjacents
Longest Common Substring
Longest Substring with K Uniques
Longest Palindrome in a String
K-th element of two Arrays
Rod Cutting
K closest elements
Minimum swaps and K together
Longest Palindromic Subsequence
First negative in every window of size k
Minimize the Heights II
First and Last Occurrences
Minimum number of deletions and insertions
Coin Change (Count Ways)
Perfect Sum Problem
Power Set
Knapsack with Duplicate Items
Partition Equal Subset Sum
Permutation with Spaces
Stream First Non-repeating
Segregate even and odd nodes in a Linked List
Count the paths
Subset Sum Problem
Maximum GCD of siblings of a binary tree
Target Sum
Reverse a Stack
Graph is Tree or Not
Frog Jump
Minimal Cost
Introduction to DP
Partitions with Given Difference
Floor in BST
Another Coin Change Problem
All numbers with specific difference
Minimum sum partition
Median in a row-wise sorted Matrix
Count Binary Strings With No Consecutive 1s
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