#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
ll m;
vector<ll> memo(1000007,-1);
ll mfac(ll x){
    if(memo[x]!=-1)return memo[x];
    if(x==0)return 1;
    return memo[x]=(x*mfac(x-1))%m;
}
int main(){
    ll l,r;
    cin>>l>>r>>m;
    if(l>=m){
        cout<<0<<endl;
        return 0;
    }
    ll fac_l=1;
    for(ll i=1;i<=l;i++){
        fac_l=(fac_l*mfac(i))%m;
    }
    ll ans=fac_l;
    for(ll i=l+1;i<=min(m-1,r);i++){
        fac_l=(fac_l*mfac(i))%m;
        ans+=fac_l;
        ans%=m;
    }
    cout<<ans<<endl;
    return 0;
}