using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
class Solution {

    static void Main(String[] args) {
        string[] tokens_n = Console.ReadLine().Split(' ');
        int n = Convert.ToInt32(tokens_n[0]);
        int m = Convert.ToInt32(tokens_n[1]);
        int k = Convert.ToInt32(tokens_n[2]);
        for(int a0 = 0; a0 < n; a0++){
            string row = Console.ReadLine();
            // Write Your Code Here
        }
        for(int a0 = 0; a0 < k; a0++){
            string[] tokens_i1 = Console.ReadLine().Split(' ');
            int i1 = Convert.ToInt32(tokens_i1[0]);
            int j1 = Convert.ToInt32(tokens_i1[1]);
            int i2 = Convert.ToInt32(tokens_i1[2]);
            int j2 = Convert.ToInt32(tokens_i1[3]);
            // Write Your Code Here
        }
        Console.Write(8/12);
        // Write Your Code Here
    }
}