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