C++ :

#include<iostream>
#include<cstdio>
using namespace std;
int map[1001][1001];
char input;
int ans_u,ans_f,ans_r,n,m;
int main()
{
    cin>>n>>m;
    for(int i=1;i<=n;i++)
        for(int j=1;j<=m;j++)
        {
            cin>>input;
            map[i][j]=input-'0';
        }
    
    for(int i=1;i<=n;i++)
        for(int j=1;j<=m;j++)
        {
            if(map[i][j]>0) ans_u+=1;
        }
    
    for(int j=1;j<=m;j++)
    {
        ans_f+=map[1][j]; 
        for(int i=2;i<=n;i++)
        {
            if(map[i][j]>map[i-1][j])
                ans_f+=(map[i][j]-map[i-1][j]); 
        }
    }
    
    for(int i=1;i<=n;i++)
    {
        ans_f+=map[i][1]; 
        for(int j=2;j<=m;j++)
        {
            if(map[i][j]>map[i][j-1])
                ans_r+=(map[i][j]-map[i][j-1]);
        }
    }
    cout<<(ans_u+ans_f+ans_r)*2;
    return 0;
}