Update README.md

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diff --git a/Data Structures/README.md b/Data Structures/README.md
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 Data Structure | Storage* | Build | Point Update | Range Update | Point Query | Range Query
 --- | --- | --- | --- | --- | --- | ---
 Segment Tree | O(n) | O(n) | O(log n) | O(log n) | O(log n) | O(log n)
-Fenwick Tree | O(n) | O(n) | O(log n) | - | O(log n) | O(log n)
+Fenwick Tree | O(n) | O(n) | O(log n) | O(log n) | O(log n) | O(log n)
 Sparse Table | O(n log n) | O(n log n) | - | - | O(1) | O(1)
 Segment Tree (2D) | O(n<sup>2</sup>) | O(n) | O(log<sup>2</sup> n) | O(log<sup>2</sup> n) | O(log<sup>2</sup> n) | O(log<sup>2</sup> n)
 Fenwick Tree (2D) | O(n<sup>2</sup>) | O(n) | O(log<sup>2</sup> n) | - | O(log<sup>2</sup> n) | O(log<sup>2</sup> n)