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pair_of_socks | ||
README.md |
Pair of Socks
Joseph is in the middle of packing for a vacation. He's having a bit of trouble finding all of his socks, though.
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.
Examples
SockPairs("AA") ➞ 1
SockPairs("ABABC") ➞ 2
SockPairs("CABBACCC") ➞ 4
Notes
- If given an empty string (no socks in the drawer), return 0.
- There can be multiple pairs of the same type of sock, such as two pairs of CC for the last example.