Introduction to Binary Index Tree or Fenwick Tree Binary Index Tree (BIT) aka Fenwick Tree is a simple data structure that has O(LogN) complexity in updating element in a …
Balanced Split Given an array of integers (which may include repeated integers), determine if there’s a way to split the array into two subarrays A and B such that …
Given an array nums. We define a running sum of an array as runningSum = sum(nums…nums). Return the running sum of nums. Example 1: Input: nums = Output: Explanation: …
Implement a trie with insert, search, and startsWith methods. Example: Trie trie = new Trie(); trie.insert("apple"); trie.search("apple"); // returns true trie.search("app"); // returns false trie.startsWith("app"); // returns true trie.insert("app"); …
Given an array of integers nums, you start with an initial positive value startValue. In each iteration, you calculate the step by step sum of startValue plus elements in …