#include <bits/stdc++.h>
using namespace std;
vector<long> adj[300005];
int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  long long n, m, j, l = 0, p = 0, q = 0, r = 0, i, flag = 0, d, t, k;
  cin >> n >> m >> k;
  if (2 * k > n || 2 * k > m) {
    cout << "Second";
  } else {
    cout << "First";
  }
  return 0;
}
