Given an integer array nums, you need to find one **continuous subarray** that if you only sort this subarray in ascending order, then the whole array will be sorted in ascending order.

Return *the shortest such subarray and output its length*.

**Example 1:**

**Input:** nums = [2,6,4,8,10,9,15]
**Output:** 5
**Explanation:** You need to sort [6, 4, 8, 10, 9] in ascending order to make the whole array sorted in ascending order.

**Example 2:**

**Input:** nums = [1,2,3,4]
**Output:** 0

**Example 3:**

**Input:** nums = [1]
**Output:** 0

**Constraints:**

1 <= nums.length <= 104

-105 <= nums[i] <= 105

**Solution:**

```
class Solution {
public int findUnsortedSubarray(int[] nums) {
int[] temp = new int[nums.length];
for(int i=0;i<nums.length;i++)
{
temp[i]=nums[i];
}
Arrays.sort(temp);
int start=0,end=nums.length-1;
while(start<nums.length && nums[start]==temp[start]) start++;
while(end>=0 && nums[end]==temp[end]) end--;
if(end<start) return 0;
return end-start+1;
}
}
```

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