#include <atcoder/all>
#include <bits/stdc++.h>

using namespace std;

// #define DISABLE_PRINT

#if defined(ENABLE_PRINT) && !defined(DISABLE_PRINT)

#define P(...) fprintf(stderr, __VA_ARGS__)
#define LP fprintf(stderr, "L: %d\n", __LINE__)

#else

#define P(...) ((void)0)
#define LP ((void)0)

#endif

#define rep(i, n) for (int i = 0; i < (int)(n); ++i)
#define ALL(x) x.begin(), x.end()

using ll = long long;
using ull = unsigned long long;

const int INF = 1100100100;
const ll INFLL = 1100100100100100100;

using mint = atcoder::dynamic_modint<0>;

int main() {
    ll L, R, M;
    cin >> L >> R >> M;

    mint::set_mod(M);

    auto ans = [&]() -> mint {
        mint f = 1;
        mint x = 1;
        mint ans = 0;
        for (ll i = 0; i < L; ++i) {
            f *= (i + 1);
            x *= f;
            if (x == 0) break;
        }
        ans += x;
        LP;
        if (x.val() == 0) return ans;
        LP;
        for (ll i = 0; i < (R - L); ++i) {
            f *= (L + 1 + i);
            x *= f;
            ans += x;
            if (x.val() == 0) break;
        }
        LP;
        return ans;
    }();

    cout << ans.val() << endl;

    return 0;
}