#include <bits/stdc++.h>
using namespace std;
int main ()
{
	int n, m, k, a, b, c, tmp;
    cin >> n >> m >> k;
    string s;
    while (n--)
        cin >> s;
    tmp = k;
    while (k--)
        cin >> c >> m >> a >> b;
    k = tmp;
    if (k%2==0)
        printf ("1.0");
    else
        printf ("0.5");
	return 0;
}