#include<bits/stdc++.h>
using namespace std;
int main()
{
	int n,m,a[10001][101],k=0;
	cin>>n>>m;
	for (int i=1;i<=n;i++)
	{
		for (int j=1;j<=m;j++) 
		{
		     cin>>a[i][j];
		}
	} 
	for (int i=1;i<=n;i++) a[i][0]=0;
	for (int i=1;i<=m;i++) a[0][i]=0;
	for (int i=1;i<=n;i++)
	{
		for (int j=1;j<=m;j++)
		{
			if (a[i][j]!=0) 
			{
				if (a[i-1][j]==0) k+=a[i][j];
			    else if (a[i-1][j]<a[i][j]) k+=a[i][j]-a[i-1][j];
			    else k+=0;
			    if (a[i+1][j]==0) k+=a[i][j];
			    else if (a[i+1][j]<a[i][j]) k+=a[i][j]-a[i+1][j];
			    else k+=0;
			    if (a[i][j-1]==0) k+=a[i][j];
			    else if (a[i][j-1]<a[i][j]) k+=a[i][j]-a[i][j-1];
			    else k+=0;
			    if (a[i][j+1]==0) k+=a[i][j];
		        else if (a[i][j+1]<a[i][j]) k+=a[i][j]-a[i][j+1];
		        else k+=0;
			    k+=2;
			}
		}
	}
	cout<<k;
	return 0;
}