<p>You are given a <strong>0-indexed</strong> integer array <code>nums</code> of size <code>3</code> which can form the sides of a triangle.</p> <ul> <li>A triangle is called <strong>equilateral</strong> if it has all sides of equal length.</li> <li>A triangle is called <strong>isosceles</strong> if it has exactly two sides of equal length.</li> <li>A triangle is called <strong>scalene</strong> if all its sides are of different lengths.</li> </ul> <p>Return <em>a string representing</em> <em>the type of triangle that can be formed </em><em>or </em><code>"none"</code><em> if it <strong>cannot</strong> form a triangle.</em></p> <p> </p> <p><strong class="example">Example 1:</strong></p> <pre> <strong>Input:</strong> nums = [3,3,3] <strong>Output:</strong> "equilateral" <strong>Explanation:</strong> Since all the sides are of equal length, therefore, it will form an equilateral triangle. </pre> <p><strong class="example">Example 2:</strong></p> <pre> <strong>Input:</strong> nums = [3,4,5] <strong>Output:</strong> "scalene" <strong>Explanation:</strong> nums[0] + nums[1] = 3 + 4 = 7, which is greater than nums[2] = 5. nums[0] + nums[2] = 3 + 5 = 8, which is greater than nums[1] = 4. nums[1] + nums[2] = 4 + 5 = 9, which is greater than nums[0] = 3. Since the sum of the two sides is greater than the third side for all three cases, therefore, it can form a triangle. As all the sides are of different lengths, it will form a scalene triangle. </pre> <p> </p> <p><strong>Constraints:</strong></p> <ul> <li><code>nums.length == 3</code></li> <li><code>1 <= nums[i] <= 100</code></li> </ul>