23 lines
598 B
Markdown
23 lines
598 B
Markdown
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## Pair of Socks
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Joseph is in the middle of packing for a vacation. He's having a bit of trouble finding all of his socks, though.
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Write a function that returns the number of sock pairs he has. A sock pair consists of two of the same letter, such as `"AA"`. The socks are represented as an unordered sequence.
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### Examples
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```text
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SockPairs("AA") ➞ 1
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SockPairs("ABABC") ➞ 2
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SockPairs("CABBACCC") ➞ 4
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```
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---
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### Notes
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- If given an empty string (no socks in the drawer), return 0.
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- There can be multiple pairs of the same type of sock, such as two pairs of CC for the last example.
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