How can I generate hash function for matrix ? or how can we compare if two submatrix are equal or not ?↵
↵
**EDIT** : tagging source [problem](https://www.spoj.com/problems/DSUBMTR/) , just to make sure it's not from an ongoing contest | interview.
↵
**EDIT** : tagging source [problem](https://www.spoj.com/problems/DSUBMTR/) , just to make sure it's not from an ongoing contest | interview.