<p>You are given an array <code>nums</code> consisting of <strong>positive</strong> integers.</p>

<p>We call a subarray of an array <strong>complete</strong> if the following condition is satisfied:</p>

<ul>
	<li>The number of <strong>distinct</strong> elements in the subarray is equal to the number of distinct elements in the whole array.</li>
</ul>

<p>Return <em>the number of <strong>complete</strong> subarrays</em>.</p>

<p>A <strong>subarray</strong> is a contiguous non-empty part of an array.</p>

<p>&nbsp;</p>
<p><strong class="example">Example 1:</strong></p>

<pre>
<strong>Input:</strong> nums = [1,3,1,2,2]
<strong>Output:</strong> 4
<strong>Explanation:</strong> The complete subarrays are the following: [1,3,1,2], [1,3,1,2,2], [3,1,2] and [3,1,2,2].
</pre>

<p><strong class="example">Example 2:</strong></p>

<pre>
<strong>Input:</strong> nums = [5,5,5,5]
<strong>Output:</strong> 10
<strong>Explanation:</strong> The array consists only of the integer 5, so any subarray is complete. The number of subarrays that we can choose is 10.
</pre>

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

<ul>
	<li><code>1 &lt;= nums.length &lt;= 1000</code></li>
	<li><code>1 &lt;= nums[i] &lt;= 2000</code></li>
</ul>

class Solution:
    def countCompleteSubarrays(self, nums: List[int]) -> int:
        distinct = len(set(nums))
        left = 0
        right = 0
        res = 0
        count = 0
        counter = {}

        while right < len(nums):
            if not nums[right] in counter:
                counter[nums[right]] = 0
            counter[nums[right]] += 1
            right += 1

            while len(counter) == distinct:
                counter[nums[left]] -= 1
                if counter[nums[left]] == 0:
                    del counter[nums[left]]
                count += 1 #只要while条件一直满足，那就是一个有效子数组
                left += 1 #只要while条件一直满足，那就是一个有效子数组

            res += count  #累加满足条件的完整子数组的数量。当窗口 [left, right] 包含了所有不同的元素时，意味着从 left 到 right 的子数组是一个完整子数组，并且从 left 到 right 的任何一个较大的子数组也是完整子数组
            
        
        return res
16600