You are given a positive integer n.
Return the integer obtained by removing all zeros from the decimal representation of n.
Example 1:
Input: n = 1020030
Output: 123
Explanation:
After removing all zeros from 1020030, we get 123.
Example 2:
Input: n = 1
Output: 1
Explanation:
1 has no zero in its decimal representation. Therefore, the answer is 1.
Constraints:
1 <= n <= 1015