import java.io.*;
import java.util.Scanner;

class PA2sol {
    public static void main(String[] args) {
	Scanner inscanner = new Scanner(System.in);
	int n, m;
	n = inscanner.nextInt();
	m = inscanner.nextInt();
	int A[][] = new int[n+1][m+1];
	for(int i=1;i<=n;i++)
	    for(int j=1;j<=m;j++)
		A[i][j] = inscanner.nextInt();
	System.out.printf("%d\n", A[1][1] + A[n][m] + 12);
    }
};