#include<bits/stdc++.h> using namespace std; int a[1010][1010]; int n,m; int main(){ freopen("grass.in","r",stdin); freopen("grass.out","w",stdout); cin>>n>>m; for(int i=1;i<=n;i++){ for(int j=1;j<=m;j++){ cin>>a[i][j]; } } int cc=0; for(int i=1;i<=n;i++){ for(int j=1;j<=m;j++){ if(i1||in||j1||jm){ cc+=a[i][j]; } } } cout<<cc; return 0; }