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# Find Original Array From Doubled Array solution leetcode -An integer array original is transformed into a doubled array changed by appending twice the value of every element in original, and then randomly shuffling the resulting array.

Posted by: insureinsurancelife - Posted on: An integer array `original` is transformed into a doubled array `changed` by appending twice the value of every element in `original`, and then randomly shuffling the resulting array.

Given an array `changed`, return `original` if `changed` is a doubled array. If `changed` is not a doubled array, return an empty array. The elements in `original` may be returned in any order.

Example 1:

```Input: changed = [1,3,4,2,6,8]
Output: [1,3,4]
Explanation: One possible original array could be [1,3,4]:
- Twice the value of 1 is 1 * 2 = 2.
- Twice the value of 3 is 3 * 2 = 6.
- Twice the value of 4 is 4 * 2 = 8.
Other original arrays could be [4,3,1] or [3,1,4].
```

Example 2:

```Input: changed = [6,3,0,1]
Output: []
Explanation: changed is not a doubled array.
```

Example 3:

```Input: changed = 
Output: []
Explanation: changed is not a doubled array.
```

Constraints:

• `1 <= changed.length <= 105`
• `0 <= changed[i] <= 105`