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Description
An array arr
is given. Each element of arr
is a number between 0 through 9. You want to remove all the duplicate numbers in the array arr
except for only one. However, the order of each element in the array arr
should be maintained. For example,
- When arr = [1, 1, 3, 3, 0, 1, 1], return [1, 3, 0, 1].
- When arr = [4, 4, 4, 3, 3], return [4, 3].
Write a function solution to return the remaining numbers after removing the duplicate numbers in the array arr
except only one.
Constraints
- Length of array
arr
: natural number less than or equal to 1,000,000. - Element of array
arr
: integer between 0 and 9.
Examples
arr | answer |
---|---|
[1,1,3,3,0,1,1] | [1,3,0,1] |
[4,4,4,3,3] | [4,3] |
Example #1,2
It is the same as the example in the problem statement.
Result
Stop
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