# 697-degree-of-an-array


Try it on <a href='https://leetcode.com/problems/697-degree-of-an-array'>leetcode</a>

## Description
<div class="description">
<div><p>Given a non-empty array of non-negative integers <code>nums</code>, the <b>degree</b> of this array is defined as the maximum frequency of any one of its elements.</p>

<p>Your task is to find the smallest possible length of a (contiguous) subarray of <code>nums</code>, that has the same degree as <code>nums</code>.</p>

<p>&nbsp;</p>
<p><strong>Example 1:</strong></p>

<pre><strong>Input:</strong> nums = [1,2,2,3,1]
<strong>Output:</strong> 2
<strong>Explanation:</strong> 
The input array has a degree of 2 because both elements 1 and 2 appear twice.
Of the subarrays that have the same degree:
[1, 2, 2, 3, 1], [1, 2, 2, 3], [2, 2, 3, 1], [1, 2, 2], [2, 2, 3], [2, 2]
The shortest length is 2. So return 2.
</pre>

<p><strong>Example 2:</strong></p>

<pre><strong>Input:</strong> nums = [1,2,2,3,1,4,2]
<strong>Output:</strong> 6
<strong>Explanation:</strong> 
The degree is 3 because the element 2 is repeated 3 times.
So [2,2,3,1,4,2] is the shortest subarray, therefore returning 6.
</pre>

<p>&nbsp;</p>
<p><strong>Constraints:</strong></p>

<ul>
	<li><code>nums.length</code> will be between 1 and 50,000.</li>
	<li><code>nums[i]</code> will be an integer between 0 and 49,999.</li>
</ul>
</div>
</div>

## Solution(Python)
```Python
class Solution:
    def findShortestSubArray(self, nums: List[int]) -> int:
        left, right, count = {}, {}, {}
        for i, x in enumerate(nums):
            if x not in left:
                left[x] = i
            right[x] = i
            count[x] = count.get(x, 0) + 1

        ans = len(nums)
        degree = max(count.values())
        for x in count:
            if count[x] == degree:
                ans = min(ans, right[x] - left[x] + 1)

        return ans

```