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