#include <bits/stdc++.h>
using namespace std;
// #include <atcoder/all>
// using namespace atcoder;

using ll = long long;
const ll MOD = 998'244'353;
//const ll MOD = 1000'000'007;

const ll INF = (1LL<<30)-1;
const ll LINF = (1LL<<62)-1;

//#define _GLIBCXX_DEQUE_BUF_SIZE 512

// int:[-2'147'483'648 : 2'147'483'647]
// ll:[-9'223'372'036'854'775'808 : 9'223'372'036'854'775'807]

#define rep(i, n) for (ll i = 0; i < (ll)(n); i++)
#define repi(i, a, n) for (ll i = a; i < (ll)(n); i++)
#define pb(a) push_back(a)
#define PS(a) cout<<(a)<<" ";
#define PL(a) cout<<(a)<<endl;
#define endl "\n"
//#define ONLINE_JUDGE 1
#ifdef ONLINE_JUDGE
    #define ES(a) while(0){}
    #define EL(a) while(0){}
#else
    #define NAME(a) #a
    #define ES(a) cerr<<NAME(a)<<": "<<(a)<<" ";
    #define EL(a) cerr<<NAME(a)<<": "<<(a)<<endl;
#endif
#define END(a) {PL(a) return;}
#define RES(a) cerr<<"\r"<<NAME(a)<<": "<<(a)<<"   ";
#define fi first
#define se second
#define ALL(a)  (a).begin(),(a).end()
#define RALL(a)  (a).rbegin(),(a).rend()
#define SORT(a) sort(a.begin(), a.end());
#define REVERSE(a) reverse(a.begin(), a.end());
#define ERASE(a) a.erase(unique(a.begin(), a.end()), a.end());
using Pii = pair<int, int>;
using Pll = pair<ll,ll>;
template <class T> using V = vector<T>;
template<typename T >ostream &operator<<(ostream &os, const vector< T > &v) {for(int i = 0; i < (int) v.size(); i++) {os << v[i] << (i + 1 != (int) v.size() ? " " : "");}return os;}
template<typename T >istream &operator>>(istream &is, vector< T > &v) {for(T &in : v) is >> in;return is;}
template<typename T, typename U > ostream &operator<<(ostream &os, const pair<T,U> &p) {os << p.first << ' ' << p.second; return os;}
template<typename T, typename U > istream &operator>>(istream &is, pair<T,U> &p) { is >> p.first >> p.second; return is;}
template<typename T, unsigned long int sz > ostream &operator<<(ostream &os, const array< T , sz > &v) {for(int i = 0; i < sz; i++) {os << v[i] << (i + 1 != (int) v.size() ? " " : "");}return os;}
template<typename T, unsigned long int sz > istream &operator>>(istream &is, array< T , sz > &v) {for(T& in:v){cin>>in;} return is;}
template<class T, class U > void chmin(T& t, const U& u) {if (t > u) t = u;}
template<class T, class U > void chmax(T& t, const U& u) {if (t < u) t = u;}

#if __has_include(<atcoder/modint>)
#include <atcoder/modint>
using namespace atcoder;
// ostream &operator<<(ostream &os, const mint x) {os<<x.val();return os;}
// istream &operator>>(istream &is, mint& x){ll val; is >> val; x = val; return is;}
#endif



void solve() {
    ll L,R,M; cin>>L>>R>>M;

    auto f = [&](ll x)->ll {
        EL(x)
        ll res = 0;
        ll g = 1;
        ll fact = 1;
        for(ll i=1;i<=x;i++){
            res += g*fact;
            res %= M;
            g *= fact;
            g %= M;
            fact *= i;
            fact %= M;
            ES(res) ES(g) EL(fact)
            if(g*fact%M==0) break;
        }
        return res;
    };



    ll ans = f(R)-f(L);
    ans += M*10;
    ans %= M;

    PL(ans)

    return;
}

int main() {
   std::cin.tie(nullptr);
   std::ios_base::sync_with_stdio(false);
   std::cout << std::fixed << std::setprecision(15);
   int TT = 1;
   //cin>>TT;
   for(int tt = 0; tt<TT; tt++) solve();
   return 0;
}