#include <bits/stdc++.h>
int main(int argc, char const *argv[]) {
  int h, w, map[200][200], i, j, sum;
  scanf("%d %d", &h, &w);
  sum = 0;
  for (i = 0; i < h; i++) {
    for (j = 0; j < w; j++) {
      scanf("%d", &map[i][j]);
      sum += map[i][j];
    }
  }
  printf("%d\n", sum);
  return 0;
}
