Easy Python Solution beating 100%
Code
# Code
```python3 []
class Solution:
    def baseNeg2(self, n: int) -> str:
        if n == 0:
            return "0"
        
        result = []
        while n != 0:
            remainder = n % -2
            n //= -2
            if remainder < 0:
                remainder *= -1
                n += 1
            result.append(str(remainder))
        
        return "".join(result[::-1])
```
['Python3']