image-smoother

class Solution {
    public int[][] imageSmoother(int[][] M) {
        int n = M.length;
        int m = M[0].length;
        int[][] res = new int[n][m];
        int[][] dir = {{-1,0},{1,0},{0,1},{0,-1},{-1,-1},{-1,1},{1,1},{1,-1},{0,0}};
        for(int i=0; i < n; i++) {
            for(int j=0; j < m; j++) {
                int count = 0;
                for(int k=0; k < dir.length; k++) {
                    if(process(res, M,i+dir[k][0], j+dir[k][1], i, j,  n, m)) {
                        count++;
                    }                            
                    
                }
                res[i][j] = res[i][j]/count;
            }
        }
        return res;
    }
    public boolean process(int[][] res, int[][] M, int x, int y, int currX, int currY, int n, int m) {
        if(x < 0 || x >= n) {
            return false;
        }
        if(y < 0 || y >= m) {
            return false;
        }
        res[currX][currY] += M[x][y];
        return true;
    }
    
}