693\. Binary Number with Alternating Bits

Easy

Given a positive integer, check whether it has alternating bits: namely, if two adjacent bits will always have different values.

**Example 1:**

**Input:** n = 5

**Output:** true

**Explanation:** The binary representation of 5 is: 101 

**Example 2:**

**Input:** n = 7

**Output:** false

**Explanation:** The binary representation of 7 is: 111.

**Example 3:**

**Input:** n = 11

**Output:** false

**Explanation:** The binary representation of 11 is: 1011.

**Constraints:**

*   <code>1 <= n <= 2<sup>31</sup> - 1</code>