steps-to-make-array-non-decreasing

Steps to Make Array Non-decreasing

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You are given a 0-indexed integer array <code>nums</code>. In one step, remove all elements <code>nums[i]</code> where <code>nums[i - 1] &gt; nums[i]</code> for all <code>0 &lt; i &lt; nums.length</code>.

Return the number of steps performed until <code>nums</code> becomes a non-decreasing array.

&nbsp;
Example 1:

<pre>
Input: nums = [5,3,4,4,7,3,6,11,8,5,11]
Output: 3
Explanation: The following are the steps performed:
- Step 1: [5,3,4,4,7,3,6,11,8,5,11] becomes [5,4,4,7,6,11,11]
- Step 2: [5,4,4,7,6,11,11] becomes [5,4,7,11,11]
- Step 3: [5,4,7,11,11] becomes [5,7,11,11]
[5,7,11,11] is a non-decreasing array. Therefore, we return 3.
</pre>

Example 2:

<pre>
Input: nums = [4,5,7,7,13]
Output: 0
Explanation: nums is already a non-decreasing array. Therefore, we return 0.
</pre>

&nbsp;
Constraints:

<ul>
	<li><code>1 &lt;= nums.length &lt;= 105</code></li>
	<li><code>1 &lt;= nums[i] &lt;= 109</code></li>
</ul>

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