#include<bits/stdc++.h>
namespace {
#pragma GCC diagnostic ignored "-Wunused-function"
#include<atcoder/all>
#pragma GCC diagnostic warning "-Wunused-function"
using namespace std;
using namespace atcoder;
#define rep(i,n) for(int i = 0; i < (int)(n); i++)
#define rrep(i,n) for(int i = (int)(n) - 1; i >= 0; i--)
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
template<class T> bool chmax(T& a, const T& b) { if (a < b) { a = b; return true; } else return false; }
template<class T> bool chmin(T& a, const T& b) { if (b < a) { a = b; return true; } else return false; }
using ll = long long;
using P = pair<int,int>;
using VI = vector<int>;
using VVI = vector<VI>;
using VL = vector<ll>;
using VVL = vector<VL>;
using mint = modint;

} int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  ll l, r;
  int m;
  cin >> l >> r >> m;
  mint::set_mod(m);
  vector<mint> f(m + 1);
  f[0] = 1;
  for(int i = 1; i <= m; i++) f[i] = f[i-1] * i;
  vector<mint> g(m + 1);
  g[0] = 1;
  for(int i = 1; i <= m; i++) g[i] = g[i-1] * f[i];
  mint ans;
  for(ll i = l; i <= r; i++) {
    if (i >= m) break;
    ans += g[i];
  }
  cout << ans.val() << '\n';
}