Binary index tree
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Fenwick tree
1
Leetcode 1649. Create Sorted Array through Instructions (binary index tree)
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2
Leetcode 3072. Distribute Elements Into Two Arrays II (binary index tree)
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3
Leetcode 308. Range Sum Query 2D - Mutable (binary index tree)
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4
Leetcode 307. Range Sum Query - Mutable (binary index tree)
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