209. First Unique Character in a

Description

Find the first unique character in a given string. You can assume that there is at least one unique character in the string.

Example

Example 1:

Input: "abaccdeff"

Output:  'b'

Explanation:

There is only one 'b' and it is the first one.

Example 2:

Input: "aabccd"

Output:  'b'

Explanation:

'b' is the first one.

思路：

和960一样，用了一样的思路。

代码：