BOX INSIDE ANOTHER BOX

Given a Matrix of size $N X N$ you have to reach the middle point of the matrix by breaking all the boundaries from any one point i.e. *any no on (i,j) of boundary* or the perimeter in one box. If you break any one element on a boundary then you can directly go to the next inner boundary or inner box then you have to break this box and further move in until you have reached the middle of the squa