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SCHOOL (2)
BASIC (44)
EASY (104)
MEDIUM (105)
HARD (10)
Linked List Group Reverse
Binary Tree to DLL
Trapping Rain Water
Smallest window containing all characters
Histogram Max Rectangular Area
Merge Without Extra Space
Longest Prefix Suffix
Edit Distance
Longest valid Parentheses
Road Blockage
Sorting Elements of an Array by Frequency
Rearrange characters
Rotate a Linked List
Sort a linked list of 0s, 1s and 2s
Add Number Linked Lists
Add 1 to a Linked List Number
Detect Loop in linked list
Bottom View of Binary Tree
Intersection in Y Shaped Lists
Diameter of a Binary Tree
Sum Tree
Tree Boundary Traversal
Directed Graph Cycle
Undirected Graph Cycle
LCA in Binary Tree
The Celebrity Problem
Largest subarray with 0 sum
Topological sort
Remove loop in Linked List
Largest BST
Minimum Swaps to Sort
Implement Atoi
Palindrome Linked List
Strongly Connected
Rat in a Maze Problem - I
Duplicate Subtree
Top View of Binary Tree
k-th Smallest in BST
Level order traversal
Peak element
Populate Inorder Successor for all nodes
ZigZag Tree Traversal
Smallest Positive Missing
Wave Array
Kadane's Algorithm
Majority Element
Binary Array Sorting
Indexes of Subarray Sum
Triplet Sum in Array
Merge Without Extra Space
Spirally traversing a matrix
Subarray with 0 sum
Longest Consecutive Subsequence
Strings Rotations of Each Other
Postfix Evaluation
Next Greater Element
Fractional Knapsack
Job Sequencing Problem
Combination Sum
Minimum Jumps
Stickler Thief
Longest Increasing Subsequence
Longest Common Subsequence
0 - 1 Knapsack Problem
Number of Unique Paths
Preorder to BST
Zero Sum Subarrays
Kth Smallest
Rotten Oranges
Steps by Knight
Print Anagrams Together
Word Break
Word Search
Sort 0s, 1s and 2s
Painting the Fence
Form the Largest Number
Maximum Product Subarray
Row with max 1s
Form a palindrome
Count the Reversals
Factorials of large numbers
k largest elements
Longest Common Substring
Smallest distinct window
Longest Palindrome in a String
K-th element of two Arrays
Triplets with Smaller Sum
Minimum swaps and K together
LCS of three strings
First negative in every window of size k
Maximum difference of zeros and ones in binary string
First and Last Occurrences
Valid Substring
Minimum Swaps for Bracket Balancing
Permutations of a String
Unique Number II
Max Sum Increasing Subsequence
Coin Change (Count Ways)
Gold Mine Problem
Smallest number
Longest subsequence-1
nCr
Maximum path sum in matrix
Digit multiplier
Jumping Numbers
Next Permutation
Longest Repeating Subsequence
Longest alternating subsequence
Stream First Non-repeating
Segregate even and odd nodes in a Linked List
Largest square formed in a matrix
Kth Largest in a Stream
Iterative Inorder
Rearrange characters
Geekland Colosseum
Geek and his Marks
K Subarray Sum
Reverse a linked list
Frequency in a Linked List
Linked list of strings forms a palindrome
Remove duplicates from an unsorted linked list
Split a Linked List into two halves
Reverse a Doubly Linked List
Check for BST
Right View of Binary Tree
Mirror 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
Intersection Sorted Linked Lists
Find Transition Point
Remove Duplicates from a Sorted Linked List
Reverse Level Order Traversal
BFS of graph
Root to leaf path sum
Square Root
Lowest Common Ancestor in a BST
Remove Duplicates Sorted Array
BST Keys in a Range
Binary Tree to BST
Leaves at Same Level or Not
Multiply two linked lists
Count Occurrence of digit k
Kth largest element in BST
Array Duplicates
Three way partitioning
Sum of leaf nodes in BST
Perfect Binary Tree
Reverse Using Stack
Find the Sum of Last N nodes of the Linked List
Find n/k th node in Linked list
Queue Reversal
Reverse first K of a Queue
Brothers From Different Roots
Learn to Comment
Swap the array elements
Swap values using References
Find the Frequency
Pair Sum in Vector
First Set Bit
Longest Consecutive 1's
Power of 2
Equilibrium Point
Array Leaders
Anagram
String Rotated by 2 Places
Isomorphic Strings
Reverse Words
Non Repeating Character
Parenthesis Checker
Minimum Cost of ropes
N meetings in one room
Reach a given score
First Repeating Element
Union of Arrays with Duplicates
Common Elements
Check Equal Arrays
Missing in Array
Product array puzzle
Max Value Permutation
Missing And Repeating
Non-Repeating Element
Maximize sum after K negations
Common in 3 Sorted Arrays
Sorted and Rotated Minimum
Chocolate Distribution Problem
Count the triplets
Find Pair Given Difference
Bitonic Point
Find Duplicate Element
Smallest subarray with sum greater than x
Remaining String
Remove Consecutive Characters
Sort in specific order
Remove Duplicates
Convert array into Zig-Zag fashion
Two Sum - Pair with Given Sum
Second most repeated string in a sequence
Number of occurrence
Min Number of Flips
Two sum -Pairs with 0 Sum
Segregate 0s and 1s
At Least K Occurrences
Count the Zeros
Palindrome String
Minimum Operations
Number of 1 Bits
Palindrome
Palindrome numbers
Largest number possible
Form a number divisible by 3 using array digits
Arithmetic Number
Subsequence Mex
Again Permutation
Police Station
Rotate Array
Sort String
Print Linked List
Find Length of Linked List
Count Leaves in Binary Tree
Replace all 0's with 5
Count zeros in a sorted matrix
First Occurence
Palindromic Array
Minimum element in BST
Is Linked List Length Even?
Sum of Binary Tree
Remove common characters and concatenate
Binary Array Sorting
Multiply Array
Sum of Array
Doubling the value
Print Elements of Array
Balanced Array
Value equal to index value
Fighting the darkness
Swap kth elements
Repeated Character
First 1 in a Sorted Binary Array
Max and Min Product from 2 Arrays
Display longest name
Find element at a given Index
Last index of One
Largest Element in Array
Rotate Array by One
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
Print first letter of every word in the string
Red OR Green
House Robber
Mean of an Array
Median of an Array
Sum of elements in a matrix
Count Squares
Middle of Three
Search in a 2D Matrix
Arrays (Sum of array)
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