Station Allocation

There are $N$ space stations orbiting around the Earth, and $C_i$ indicates the maximum capacity the $i^{th}$ station can hold. Additionally, there are $Q$ missions that must be carried out. Each mission has two requirements: a crew requirement $X$ and a storage requirement $Y$. The crew must all stay in a single cabin, while the other $N-1$ cabins can be used for storage. If cabin $i$ is ch