#include <bits/stdc++.h>   using namespace std;   long a, b, r;   int main() {     ios_base::sync_with_stdio(0);     cin >> a >> b >> r;     if (min(a, b) >= 2 * r)       cout <<  First  << endl;     else       cout <<  Second  << endl;     cin.get();     cin.get();     return 0;   }   