#include<iostream>
#include<fstream>
using namespace std;
ifstream in("flip.in");
ofstream out("flip.out");
int v[20][20];
int main(void)
{
    int m,n,j,i,s;
    in>>n;
    in>>m;
    s=0;
    for(i=1;i<=n;i++)
    {
        for(j=1;j<=m;j++)
        {
            in>>v[i][j];
            s=s+v[i][j];
        }
    }
    out<<s;
    in.close();
    out.close();
    return 0;
}