✅ [Python/Rust] Binary Indexed Tree (with detailed comments)
\u2705 IF YOU LIKE THIS SOLUTION, PLEASE UPVOTE.\n*\nThis solution employs Binary Indexed Tree* data structure for fast queries and updates of sums. Time comple
**\u2705 IF YOU LIKE THIS SOLUTION, PLEASE UPVOTE.**\n****\nThis solution employs *Binary Indexed Tree* data structure for fast queries and updates of sums. Time complexity (for both querying and updating) is **O(logN)**. Space complexity is **O(N)**. \n<iframe src="https://leetcode.com/playground/7wjKjSMF/shared" frameBorder="0" width="800" height="850"></iframe>
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