#include <bits/stdc++.h>
#include<iostream>
#include<map>
#include<vector>
#include <algorithm>
#include<math.h>
#include <iomanip>
#include<set>
#include <numeric>
#include<string>
using ll = long long;
using namespace std;


int main()
{
    ll n, l, m, lim = 0, pro = 1, cumpro = 1, sum1 = 0;
    cin >> n >> l >> m;
    for (ll i = 1; i <= m; i++){
        pro *= i;
        if(!(pro%m)){
            lim = i;
            break;
        }
        pro %= m;
    }
    pro = 1;
    for (ll i = 1; i < lim; i++){
        pro *= i;
        cumpro *= pro;
        if (!(cumpro%m)) break;
        cumpro %= m;
        if (i >= n) sum1 += cumpro%m;
        sum1 %= m;
    }
    cout << sum1 << endl;
}