**Description:**

You are given a sorted array consisting of only integers where every element appears exactly twice, except for one element which appears exactly once. Find this single element that appears only once.

**Example 1:**

Input:[1,1,2,3,3,4,4,8,8]Output:2

**Example 2:**

Input ...

**Description:**

Given the string `croakOfFrogs`

, which represents a combination of the string "croak" from different frogs, that is, multiple frogs can croak at the same time, so multiple “croak” are mixed. *Return the minimum number of *different* frogs to finish all the croak in the given string.*

A valid ...

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