Pre-compute in the constructor
Code
# Code
```python3 []
class Solution:

    def __init__(self, limit=1000):
        self.min_or_input = dict()
        # precompute the min bitwise inputs
        for n in range(limit + 1):
            val = n | (n + 1)
            if val not in self.min_or_input:
                self.min_or_input[val] = n

    def minBitwiseArray(self, nums: List[int]) -> List[int]:
        return [self.min_or_input.get(n, -1) for n in nums]
```
['Python3']