### Smallest element from all square submatrices of size K

2020. 7. 9.· After performing the above operations, the top-left submatrix of size (N K + 1)*(M K + 1) of the matrix arr[][] consists of all the smallest elements of all the K x K sub-matrices of the given matrix. Therefore, print the submatrix of size (N K + 1)*(M K + 1) as the required output. Below is the implementation of the above approach: