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| 1 | +<h2><a href="https://leetcode.com/problems/special-array-i">Special Array I</a></h2> <img src='https://img.shields.io/badge/Difficulty-Easy-brightgreen' alt='Difficulty: Easy' /><hr><p>An array is considered <strong>special</strong> if every pair of its adjacent elements contains two numbers with different parity.<!-- notionvc: e6bed0fa-c67d-43a7-81b4-99fb85b99e98 --></p> |
| 2 | + |
| 3 | +<p>You are given an array of integers <code>nums</code>. Return <code>true</code> if <code>nums</code> is a <strong>special</strong> array, otherwise, return <code>false</code>.</p> |
| 4 | + |
| 5 | +<p> </p> |
| 6 | +<p><strong class="example">Example 1:</strong></p> |
| 7 | + |
| 8 | +<div class="example-block"> |
| 9 | +<p><strong>Input:</strong> <span class="example-io">nums = [1]</span></p> |
| 10 | + |
| 11 | +<p><strong>Output:</strong> <span class="example-io">true</span></p> |
| 12 | + |
| 13 | +<p><strong>Explanation:</strong></p> |
| 14 | + |
| 15 | +<p>There is only one element. So the answer is <code>true</code>.</p> |
| 16 | +</div> |
| 17 | + |
| 18 | +<p><strong class="example">Example 2:</strong></p> |
| 19 | + |
| 20 | +<div class="example-block"> |
| 21 | +<p><strong>Input:</strong> <span class="example-io">nums = [2,1,4]</span></p> |
| 22 | + |
| 23 | +<p><strong>Output:</strong> <span class="example-io">true</span></p> |
| 24 | + |
| 25 | +<p><strong>Explanation:</strong></p> |
| 26 | + |
| 27 | +<p>There is only two pairs: <code>(2,1)</code> and <code>(1,4)</code>, and both of them contain numbers with different parity. So the answer is <code>true</code>.</p> |
| 28 | +</div> |
| 29 | + |
| 30 | +<p><strong class="example">Example 3:</strong></p> |
| 31 | + |
| 32 | +<div class="example-block"> |
| 33 | +<p><strong>Input:</strong> <span class="example-io">nums = [4,3,1,6]</span></p> |
| 34 | + |
| 35 | +<p><strong>Output:</strong> <span class="example-io">false</span></p> |
| 36 | + |
| 37 | +<p><strong>Explanation:</strong></p> |
| 38 | + |
| 39 | +<p><code>nums[1]</code> and <code>nums[2]</code> are both odd. So the answer is <code>false</code>.</p> |
| 40 | +</div> |
| 41 | + |
| 42 | +<p> </p> |
| 43 | +<p><strong>Constraints:</strong></p> |
| 44 | + |
| 45 | +<ul> |
| 46 | + <li><code>1 <= nums.length <= 100</code></li> |
| 47 | + <li><code>1 <= nums[i] <= 100</code></li> |
| 48 | +</ul> |
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