import java.io.*;
import java.util.Scanner;
public class P4 {
        
    /**
     * Creates a new instance of <code>P4</code>.
     */
    public static int[][] fill(int [][] map,int w,int l) {
    	for(int col=1;col<(w-1);col++){
    		for(int row = 1;row<(l-1);row++){
    			map[col][row]++;
    		}
    	}
    	for(int col=1;col<(w-1);col++){
    		for(int row = 1;row<(l-1);row++){
    			if(map[col][row]>map[col+1][row]||map[col][row]>map[col-1][row]||map[col][row]>map[col][row+1]||map[col][row]>map[col][row-1]){
    				map[col][row]--;
    			}
    		}
    	}
    	return map;
    }
    
    /**public static int[][] drain(int [][] map,int w,int l){
    	for(int col=1;col<(w-1);col++){
    		for(int row = 1;row<(l-1);row++){
    			if(map[col][row]>map[col+1][row]||map[col][row]>map[col-1][row]||map[col][row]>map[col][row+1]||map[col][row]>map[col][row-1]){
    				map[col][row]--;
    			}
    		}
    	}
    	return map;
    }*/
    
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws IOException {
        Scanner input = new Scanner(new File("DATA5.txt"));
        PrintWriter out = new PrintWriter(new FileWriter("OUT5.txt"));
        for(int p=0;p<5;p++){
        
        int w,l;
        w=input.nextInt();
        l=input.nextInt();
        
        
        
        int sum=0;
        int [][] map = new int [w][l];
        int [][] original = new int[w][l];
        for(int col=0;col<w;col++){
        	for(int row=0;row<l;row++){
        		map[col][row]=input.nextInt();
        		original[col][row]=map[col][row];
        	}
        }
        if(w<3||l<3){
        	out.println("0");
        }else{
        for(int j=0;j<50;j++){
        	map=fill(map,w,l);
        	//map=drain(map,w,l);
        }
           for(int col=0;col<w;col++){
        	for(int row=0;row<l;row++){
        		sum=sum+((map[col][row])-(original[col][row]));
        		//System.out.print (map[col][row]);
        		//System.out.println (original[col][row]);
        	}
        }
        out.println (sum);
        }
        }
        out.close();
    }
}