Python Solution
Code


# Code
```python3 []
class Solution:
    def miceAndCheese(self, reward1: List[int], reward2: List[int], k: int) -> int:

        diff=[]
        for i in range(len(reward1)):
            diff.append(reward1[i]-reward2[i])
        
        result=sum(reward2)
        diff.sort(reverse=True)
        
        result+=sum(diff[0:k])
        return result


        
```
['Python3']