| Convert BST to Greater Sum Tree |
Medium
|
amazon
apple
microsoft
uber
|
|
| Explain x & (-x) |
|
|
|
| Remove duplicate characters in a string |
Medium
|
|
|
| Check if given array is Palindrome OR Not |
Medium
|
|
|
| Expression Tree Definition |
|
|
|
| Longest Absolute File Path Problem |
Medium
|
amazon
apple
facebook
google
uber
wish
|
|
| Find index k in boolean matrix where kth row has all 0s and kth column has all 1s |
Medium
|
|
|
| Sorting a Stack using push,pop,isEmpty and peek |
Medium
|
|
|
| Implement 3 stacks in 1 array |
Medium
|
|
|
| Implement insertion sort with stacks |
Medium
|
|
|
| Order-agnostic Binary Search on Sorted Array |
Medium
|
|
|
| Unique BSTs 3 - Count given node keys between m and n |
Medium
|
|
|
| Check if an Array of Integers is Sorted |
Easy
|
|
|
| Count frequency of target element in sorted array |
Medium
|
|
|
| Count number of bits to be flipped to convert A to B |
Easy
|
|
|
| Determine if a string has all unique characters |
Medium
|
|
|
| Find floor of target element in a sorted array |
Medium
|
|
|
| Find the nearest numbers that have same number of 1s for an integer |
Medium
|
|
|
| Implement selection sort on stack |
Medium
|
|
|
| List Combinations - Generate unique combinations from list selecting 1 element from each |
Medium
|
|
|
| Longest Substring with K distinct characters |
Medium
|
google
|
|
| Maximum Pairwise Product 1 - Given only Positive Integers |
Easy
|
|
|
| Remove duplicates from an unsorted linked list keeping only one instance |
Easy
|
|
|
| Replace all spaces in c-style string with '%20' |
Medium
|
|
|
| Rotate String Problem |
Easy
|
amazon
apple
ebay
google
linkedin
microsoft
oracle
|
|
| Set all bits of a number in a range equal to another number |
Medium
|
|
|
| Swap odd and even bits in an integer |
Medium
|
cisco
|
|
| Find smallest letter greater than target in a sorted array of letters |
Easy
|
linkedin
|
|
| Find Common Elements in Two Sorted Linked Lists |
Medium
|
|
|
| Find last modular node in linked list for given k |
Medium
|
|
|
| Check if the length of a linked list is even or odd |
Medium
|
|
|
| Array-based Trie Implementation |
|
|
|
| Count Beautiful Numbers |
Hard
|
|
|
| Count Cells in Overlapping Horizontal and Vertical Substrings |
Medium
|
|
|
| Count Partitions with Even Sum Difference |
Easy
|
|
|
| Count Special Subsequences |
Medium
|
|
|
| Count Substrings Divisible By Last Digit |
Hard
|
|
|
| Design a 3D Binary Matrix with Efficient Layer Tracking |
Medium
|
|
|
| Design an Array Statistics Tracker |
Hard
|
|
|
| Design Task Manager |
Medium
|
|
|
| Digit Operations to Make Two Integers Equal |
Medium
|
|
|
| DNA Pattern Recognition |
Medium
|
|
|
| Eat Pizzas! |
Medium
|
|
|
| Equal Sum Grid Partition II |
Hard
|
|
|
| Find Circular Gift Exchange Chains |
Hard
|
|
|
| Find Closest Person |
Easy
|
|
|
| Find Invalid IP Addresses |
Hard
|
|
|
| Find Minimum Cost to Remove Array Elements |
Medium
|
|
|
| Find Mirror Score of a String |
Medium
|
|
|
| Find Most Frequent Vowel and Consonant |
Easy
|
|
|