using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;
class Program
{
    static int NN => int.Parse(ReadLine());
    static long[] NList => ReadLine().Split().Select(long.Parse).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var c = NList;
        var (l, r, m) = (c[0], c[1], c[2]);
        var f = new long[m];
        f[1] = 1;
        var dp = new long[m];
        dp[1] = 1;
        for (var i = 2; i < m; ++i)
        {
            f[i] = f[i - 1] * i % m;
            dp[i] = dp[i - 1] * f[i] % m;
        }
        var ans = 0L;
        for (var i = l; i <= r && i < m; ++i) ans = (ans + dp[i]) % m;
        WriteLine(ans);
    }
}