#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using mint = atcoder::modint;
int mod;
//using mint = modint1000000007;
//const int mod = 1000000007;
//using mint = modint998244353;
//const int mod = 998244353;
//const int INF = 1e9;
//const long long LINF = 1e18;
#define rep(i, n) for (int i = 0; i < (n); ++i)
#define rep2(i,l,r)for(int i=(l);i<(r);++i)
#define rrep(i, n) for (int i = (n-1); i >= 0; --i)
#define rrep2(i,l,r)for(int i=(r-1);i>=(l);--i)
#define all(x) (x).begin(),(x).end()
#define allR(x) (x).rbegin(),(x).rend()
#define endl "\n"
#define P pair<int,int>
template<typename A, typename B> inline bool chmax(A & a, const B & b) { if (a < b) { a = b; return true; } return false; }
template<typename A, typename B> inline bool chmin(A & a, const B & b) { if (a > b) { a = b; return true; } return false; }

int main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	long long l, r; cin >> l >> r >> mod;
	l--;
	chmin(l, mod);
	chmin(r, mod);
	mint::set_mod(mod);
	vector<mint>fact(mod + 1, 1), fact2(mod + 1, 1), sfact(mod + 2);
	rep(i, mod) fact[i + 1] = fact[i] * (i + 1);
	rep(i, mod) fact2[i + 1] = fact2[i] * fact[i + 1];
	rep(i, mod + 1)sfact[i + 1] = sfact[i] + fact2[i];
	mint ans = sfact[r + 1] -  sfact[l + 1];
	cout << ans.val() << endl;
	return 0;
}