#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pll = pair<ll, ll>;
#define drep(i, cc, n) for (ll i = (cc); i <= (n); ++i)
#define rep(i, n) drep(i, 0, n - 1)
#define all(a) (a).begin(), (a).end()
#define pb push_back
#define fi first
#define se second

const ll MOD = 1000000007;
const ll MOD2 = 998244353;
const ll INF = 1LL << 60;
const ll MAX_N = 2e5;

int main(){
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    
    ll L, R, M;
    cin >> L >> R >> M;

    ll p = 1;
    ll pdot = 1;
    vector<ll> dp(M, 0);
    dp[1] = 1;
    for(ll i=2; i<=M-1; i++){
        p = (p*i)%M;
        pdot = (pdot * p)%M;
        dp[i] = (dp[i-1] + pdot)%M;
    }
    
    cout << (dp[min(R, M-1)] - dp[min(L-1, M-1)] + M)%M << endl;
}