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

#define rep(i,n) for(ll i = 0LL; i < (ll)n; i++)
#define FOR(n) for(ll i = 0LL; i < (ll)n; i++)
#define repi(i,a,b) for(ll i = (ll)a; i < (ll)b; i++)
#define all(x) x.begin(),x.end()
//#define mp make_pair
#define vi vector<ll>
#define vvi vector<vi>
#define vll vector<ll>
#define vvll vector<vll>
#define vs vector<string>
#define vvs vector<vs>
#define vc vector<char>
#define vvc vector<vc>
#define pii pair<ll,ll>
#define pllll pair<ll,ll>
#define vpii vector<pair<ll,ll>>
#define vpllll vector<pair<ll,ll>>
#define vpis vector<pair<ll,string>>
#define vplls vector<pair<ll, string>>
#define vpsi vector<pair<string, ll>>
#define vpsll vector<pair<string, ll>>

template<typename T>
void chmax(T &a, const T &b) {a = (a > b? a : b);}
template<typename T>
void chmin(T &a, const T &b) {a = (a < b? a : b);}

using ll = long long;
using ld = long double;
using ull = unsigned long long;

const ll INF = numeric_limits<long long>::max() / 2;
const ld pi = acos(-1);
const ll mod = 998244353;
int dx[] = {-1, 0LL, 1, 0LL, -1, 1, -1, 1};
int dy[] = {0LL, -1, 0LL, 1, -1, -1, 1, 1};

#define int long long

void solve() {
    //1^L*2^(L-1)*...*L+1^(L+1)*2^L*3^(L-1)*...*(L+1)*...*
    //f(X)=
    //初項1
    //項数X
    //a_(i+1)=a_i*(i+1)!

    //S_(n+1)=S_n * ((n+1)! + 1)
    //s_(n+1)/
    //S_1=1


    //の時の\sum(a_1...X)
    //ans = f(R)-f(L)

    int l, r, m;
    cin >> l >> r >> m;

    r = min(r, m);
    vi fact(r+1, 1);
    repi(i, 1, r+1) fact[i] = fact[i-1] * i % m;

    vi s(r+1);
    s[1] = 1;
    int now = 1;
    repi(i, 1, r) {
        (now *= fact[i+1]) %= m;
        s[i+1] = (s[i] + now) % m;
    }

    if(l > r) cout << 0 << endl;
    else cout << ((s[r] - s[l-1])%m+m)%m << endl;
}
//euler tourの点更新、辺更新の追加

signed main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    solve();
    return 0LL;
}