#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, m;
  cin >> n >> m;
  int c = 0;
  int a[2 * m];
  for (int i = 0; i < n; i++) {
    for (int j = 0; j < 2 * m; j++) cin >> a[j];
    for (int j = 0; j < 2 * m - 1; j += 2) {
      if (a[j] == 1 || a[j + 1] == 1) c++;
    }
  }
  cout << c << endl;
}
