#include <bits/stdc++.h>
using namespace std;
long long i, j, k, l, m, n, t, a[111][111], b[111][111], c[111111], d, s;
string p[111], q[111111];
map<long long, long long> x, y, z;
int main() {
  cin >> n >> m >> k;
  n = min(n, m);
  if (n >= 2 * k)
    cout << "First";
  else
    cout << "Second";
}
