#include<bits/stdc++.h>
#define int long long
#define matsuri pair<int,int>
//const int iris = 1e9+7;
const int iris = 998244353;
using namespace std;

void solve()
{
	int l,r,m;
	cin>>l>>r>>m;
	vector<int> fac(m+1, 1), pr(m+1, 1);
	for(int i=1;i<=m;i++)
		fac[i]=fac[i-1]*i%m;
	for(int i=1;i<=m;i++)
		pr[i]=pr[i-1]*fac[i]%m;
	int ans=0;
	for(int i=l;i<=min(r,m);i++)
		ans=(ans+pr[i])%m;
	cout<<ans<<'\n';
}

signed main()
{
	ios::sync_with_stdio(0);
	cin.tie(0);

	int T=1;
	//cin>>T;
	while(T--)
		solve();

	return 0;
}