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Add counting sort.
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README.md
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README.md
@ -217,13 +217,13 @@ Below is the list of some of the most used Big O notations and their performance
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### Array Sorting Algorithms Complexity
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| Name | Best | Average | Worst | Memory | Stable |
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| --------------------- | :-------: | :-------: | :-----------: | :-------: | :-------: |
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| **Bubble sort** | n | n^2 | n^2 | 1 | Yes |
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| **Insertion sort** | n | n^2 | n^2 | 1 | Yes |
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| **Selection sort** | n^2 | n^2 | n^2 | 1 | No |
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| **Heap sort** | n log(n) | n log(n) | n log(n) | 1 | No |
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| **Merge sort** | n log(n) | n log(n) | n log(n) | n | Yes |
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| **Quick sort** | n log(n) | n log(n) | n^2 | log(n) | No |
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| **Shell sort** | n log(n) | depends on gap sequence | n (log(n))^2 | 1 | No |
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| **Counting sort** | n + r | n + r | n + r | n + r | Yes |
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| Name | Best | Average | Worst | Memory | Stable | Comments |
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| --------------------- | :-------: | :-------: | :-----------: | :-------: | :-------: | :-------- |
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| **Bubble sort** | n | n^2 | n^2 | 1 | Yes | |
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| **Insertion sort** | n | n^2 | n^2 | 1 | Yes | |
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| **Selection sort** | n^2 | n^2 | n^2 | 1 | No | |
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| **Heap sort** | n log(n) | n log(n) | n log(n) | 1 | No | |
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| **Merge sort** | n log(n) | n log(n) | n log(n) | n | Yes | |
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| **Quick sort** | n log(n) | n log(n) | n^2 | log(n) | No | |
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| **Shell sort** | n log(n) | depends on gap sequence | n (log(n))^2 | 1 | No | |
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| **Counting sort** | n + r | n + r | n + r | n + r | Yes | r - biggest number in sorted array |
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