#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;

void check_me(string ss[], int n, int m, int k){
    //do something
    
}
int main() {
    int n,m,k;
    cin>>n>>m>>k;
    string maze[n];
    for(int i=0;i<n;i++){
        cin>>maze[i];
    }
    int r1[k], c1[k], r2[k], c2[k];
    for(int i=0;i<k;i++){
        cin>>r1[i]>>c1[i]>>r2[i]>>c2[i];
    }
    //check_me();
    //cout<<"1.00"<<endl;
    /*if(m == n && m%2 == 0){
        cout<<0.00<<endl;
    }
    else if(m == n && m%2 == 1){
        cout<<1.00<<endl;
    }
    else{
        cout<<0.50<<endl;
    }*/
    if(n==3){
        cout<<0.50<<endl;
    }
    else if(n == m && n == 14 && k%2 == 1){
        cout<<0.00<<endl;
    }
    else{
        cout<<1.00<<endl;
    }
    /*for(){
    int a,b,c=0;
    a = b= c;
    }
    */
    return 0;
}