Update README.md

Author: kamyu104

README.md

@@ -610,7 +610,7 @@
 2352 | [Equal Row and Column Pairs](https://leetcode.com/problems/equal-row-and-column-pairs/) | [C++](./C++/equal-row-and-column-pairs.cpp) [Python](./Python/equal-row-and-column-pairs.py) | _O(n^2)_ | _O(n^2)_ | Medium ||  Hash Table
 2354 | [Number of Excellent Pairs](https://leetcode.com/problems/number-of-excellent-pairs/) | [C++](./C++/number-of-excellent-pairs.cpp) [Python](./Python/number-of-excellent-pairs.py) | _O(n)_ | _O(n)_ | Hard ||  Bit Manipulation, Sort, Two Pointers, Freq Table, Combinatorics
 2357 | [Make Array Zero by Subtracting Equal Amounts](https://leetcode.com/problems/make-array-zero-by-subtracting-equal-amounts/) | [C++](./C++/make-array-zero-by-subtracting-equal-amounts.cpp) [Python](./Python/make-array-zero-by-subtracting-equal-amounts.py) | _O(n)_ | _O(n)_ | Easy || Hash Table
-2363 | [Merge Similar Items](https://leetcode.com/problems/merge-similar-items/) | [C++](./C++/merge-similar-items.cpp) [Python](./Python/merge-similar-items.py) | _O((m + n) * log(m + n))_ | _O(m + n)_ | Easy || Freq Table
+2363 | [Merge Similar Items](https://leetcode.com/problems/merge-similar-items/) | [C++](./C++/merge-similar-items.cpp) [Python](./Python/merge-similar-items.py) | _O((m + n) * log(m + n))_ | _O(m + n)_ | Easy || Freq Table, Sort
 2364 | [Count Number of Bad Pairs](https://leetcode.com/problems/count-number-of-bad-pairs/) | [C++](./C++/count-number-of-bad-pairs.cpp) [Python](./Python/count-number-of-bad-pairs.py) | _O(n)_ | _O(n)_ | Medium | variant of [Count Nice Pairs in an Array](https://leetcode.com/problems/count-nice-pairs-in-an-array/) | Hash Table
 2365 | [Task Scheduler II](https://leetcode.com/problems/task-scheduler-ii/) | [C++](./C++/task-scheduler-ii.cpp) [Python](./Python/task-scheduler-ii.py) | _O(n)_ | _O(n)_ | Medium || Hash Table
 2367 | [Number of Arithmetic Triplets](https://leetcode.com/problems/number-of-arithmetic-triplets/) | [C++](./C++/number-of-arithmetic-triplets.cpp) [Python](./Python/number-of-arithmetic-triplets.py) | _O(n)_ | _O(n)_ | Easy || Hash Table