Name	Name	Last commit message	Last commit date
parent directory ..
Solution.playground	Solution.playground
Makefile	Makefile
README.md	README.md
Solution.swift	Solution.swift
main.cpp	main.cpp

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First Unique Character in a String

Given a string, find the first non-repeating character in it and return it's index. If it doesn't exist, return -1.

Examples:

s = "leetcode" return 0.

s = "loveleetcode", return 2. Note: You may assume the string contain only lowercase letters.

Solutions:

O(n)

O(n)

Run make to build and run C++ files and run Swift files. Or you can run .playground file.