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SCHOOL (2)
BASIC (60)
EASY (97)
MEDIUM (55)
HARD (4)
- Rotate Array
- Sort String
- Count Linked List Nodes
- Size of Binary Tree
- Count Leaves in Binary Tree
- Postorder Traversal
- Implement stack using array
- First Occurence
- C++ STL | Set 1 (vector)
- C++ STL | Set 3 (map)
- C++ STL | Set 6 (set)
- C++ STL | Set 8 (unordered set)
- Peak element
- Play with an array
- Minimum element in BST
- Is Linked List Length Even?
- longest substring containing '1'
- Alternates in an Array
- Count Odd and Even
- Sort and Reverse Vector
- Front to Back
- Set Operations
- Bit Difference
- Array Search
- Sorted Array Search
- Binary Array Sorting
- Check if a string is Isogram or not
- Binary String
- Most Frequent Character
- Remove common characters and concatenate
- C++ Hello World
- Searching in an Array
- Segregate Even and Odd numbers
- Count of camel case characters
- Immediate Smaller Element
- Sum of distinct elements
- Uncommon characters
- Quick Left Rotation
- Reversing the vowels
- Remove Spaces
- Repeated Character
- Reverse a string with spaces intact
- Find element at a given Index
- Sort the string in descending order
- Merge two strings
- Rotate Array by One
- Exceptionally odd
- Array Subset
- Rotating an Array
- Remove Duplicates from unsorted array
- First and Second Smallests
- Print first letter of every word in the string
- Good or Bad string
- Sort the fest
- Java Hello World
- Reverse digits
- Binary number to decimal number
- Check if the number is Fibonacci
- Middle of Three
- nPr
- Rotate a Linked List
- Detect Loop in linked list
- Merge two sorted linked lists
- Sum Tree
- Delete a node from BST
- LCA in Binary Tree
- Two Stacks in an Array
- Largest subarray with 0 sum
- Max sum in the configuration
- Serialize and deserialize a binary tree
- Check if subtree
- Remove loop in Linked List
- Multiply two strings
- Maximum Difference
- Palindrome Linked List
- Merge two BST 's
- Top View of Binary Tree
- k-th Smallest in BST
- Construct Tree from Inorder & Preorder
- Smallest Positive Missing
- Stock buy and sell
- Kadane's Algorithm
- Majority Element
- Triplet Sum in Array
- Subarray with 0 sum
- Longest Consecutive Subsequence
- Case-specific Sorting of Strings
- Next Greater Element
- Kth smallest element
- Longest Increasing Subsequence
- Longest Common Subsequence
- Kth Smallest
- Shortest Common Supersequence
- Sort 0s, 1s and 2s
- Single Among Doubles in a Sorted
- Pair Sum Closest to 0
- Search in Rotated Sorted Array
- Row with max 1s
- Check if frequencies can be equal
- Column name from a given column number
- Nuts and Bolts Problem
- Sum of two large numbers
- Factorials of large numbers
- Longest Common Substring
- Longest substring with distinct characters
- Longest Palindrome in a String
- Minimize the Heights II
- Permutations of a String
- Friends Pairing Problem
- Subarrays Product Less than K
- Unique Number II
- Coin Change (Count Ways)
- nCr
- Total Decoding Messages
- Check Mirror in N-ary tree
- Reverse a linked list
- Frequency in a Linked List
- Pairwise swap elements of a linked list
- Node at a given index in linked list
- Delete nodes having greater value on right
- Check for BST
- Right View of Binary Tree
- K distance from root
- Mirror Tree
- Two Mirror Trees
- Maximum Width of Tree
- Delete without head pointer
- Height of Binary Tree
- Balanced Tree Check
- Kth from End of Linked List
- Middle of a Linked List
- Left View of Binary Tree
- Transform to Sum Tree
- Remove Duplicates from a Sorted Linked List
- Stack using two queues
- Level Order in spiral form
- Reverse Level Order Traversal
- Insert a node in a BST
- Square Root
- Lowest Common Ancestor in a BST
- Binary Search
- Largest subarray of 0's and 1's
- Level Order Line by Line
- Leaves at Same Level or Not
- Delete in a Singly Linked List
- Kth largest element in BST
- Array Duplicates
- Special Stack
- Level order traversal
- Inorder Successor in BST
- Max and min element in Binary Tree
- Reverse Using Stack
- Full Binary Tree
- Merge Lists Alternatingly
- Sum of Leaf Nodes
- Brothers From Different Roots
- Learn to Comment
- Swap the array elements
- Find the Frequency
- Back to Front
- Pair Sum in Vector
- Array Leaders
- Anagram
- String Rotated by 2 Places
- Reverse Words
- Non Repeating Character
- Parenthesis Checker
- First Repeating Element
- Union of Arrays with Duplicates
- Check Equal Arrays
- Missing in Array
- Roman Number to Integer
- Intersection of Arrays with Distinct
- Missing And Repeating
- Find Kth Rotation
- Common in 3 Sorted Arrays
- Sorted and Rotated Minimum
- Maximum no of 1's row
- Next greater number set digits
- Move All Zeroes to End
- Missing number
- Find Pair Given Difference
- Pairs with difference k
- Finding Number
- Find Duplicate Element
- Amend The Sentence
- Remaining String
- Remove b and ac from a given string
- Form largest number from digits
- Remove Duplicates
- Compete the skills
- Twice Counter
- Second Largest
- Convert array into Zig-Zag fashion
- Two Sum - Pair with Given Sum
- Second most repeated string in a sequence
- Find all pairs with a given sum
- Number of occurrence
- Longest Common Prefix of Strings
- First Repeated Character
- Two sum -Pairs with 0 Sum
- Three Great Candidates
- At Least K Occurrences
- Element with left side smaller and right side greater
- Left out candies
- Is Binary Number Multiple of 3
- Replace a word
- Number of 1 Bits
- Swap two nibbles in a byte
- Palindrome
- Shortest path from 1 to n
- Numbers with same first and last digit
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