#include <iostream>
using namespace std;

int main() {
	int h, w, shots;
	cin >> h >> w >> shots;
	int a[10][10] = {};
	for (int j = 0; j < 10; j++)
		for (int i = 0; i < 10; i++)
			a[j][i] = 101;
	for (int _ = 0; _ < shots; _++) {
		int py, px;
		cin >> py >> px;
		for (int j = py - 1; j <= py + 1; j++)
			for (int i = px - 1; i <= px + 1; i++)
				if (j >= 0 && j < h && i >= 0 && i < w)
					a[j][i] -= 5;
	}
	int years = 0;
	for (int j = 0; j < h; j++)
		for (int i = 0; i < w; i++) {
			if (a[j][i] < 101) {
				if (a[j][i] >= 50)
					years += 87;
				else if (a[j][i] < 0)
					years += 6666;
				else
					years += 777;
			}
		}
	cout << years << endl;
}