% find the maximum possible size of a square in (x,y)

function res = randSqr(x,y,A,mSize)
    sizeA = length(A);
    %size=0;
    res=mSize;
    for size=[2:1:mSize]
        if max(max(A(x:x+size-1,y:y+size-1))) > 0
            res=size-1 ;
            break;
        end
    end
end