#define loop(i,from,to) for (int i = from; i < to; ++i)
#include <bits/stdc++.h>

using std::cin;
using std::cout;
using std::endl;
using std::vector;
using std::string;
using std::pair;
using std::set;

const int INF = 1e9+7;
const double eps = 1e-6;


signed main() {
  freopen("input.txt", "r", stdin);
  std::ios::sync_with_stdio(false);
  cin.tie(0);
  int a, b, k, x, y, t; cin >> a >> b >> k;
  vector< vector<int> > map(a);
  for (int i = 0; i < a; ++i)
    map[i].resize(b, 0);
  /*
  1. *#   2. #*
     ##      ##

  3. ##   4. ##
     *#      #*
  */
  long long answ = 0;
  for (int i = 0; i < k; ++i) {
    cin >> t >> y >> x;
    x--;
    y--;
    if ( y > a - 2 || x > b - 2 ) continue;
    // cout << y << " " << x << " " << answ << endl;
    switch (t) {
      case 1:
        if (!map[y + 1][x] && !map[y + 1][x + 1] && !map[y][x + 1]) {
          map[y + 1][x]++;
          map[y + 1][x + 1]++;
          map[y][x + 1]++;
          answ += 3;
        }
        break;
      case 2:
        if (!map[y][x] && !map[y + 1][x + 1] && !map[y + 1][x]) {
          map[y][x]++;
          map[y + 1][x + 1]++;
          map[y + 1][x]++;
          answ += 3;
        }
        break;
      case 3:
        if (!map[y][x] && !map[y][x + 1] && !map[y + 1][x + 1]) {
          map[y][x]++;
          map[y][x + 1]++;
          map[y + 1][x + 1]++;
          answ += 3;
        }
        break;
      case 4:
        if (!map[y + 1][x] && !map[y][x] && !map[y][x + 1]) {
          map[y + 1][x]++;
          map[y][x]++;
          map[y][x + 1]++;
          answ += 3;
        }
    }
  }
  cout << answ;
  //std::cout << "Hello World!\n";
  return 0;
}