#include <bits/stdc++.h> 
using namespace std;
using ll =long long;
#define all(v) v.begin(),v.end()
 #define rep(i,a,b) for(int i=a;i<b;i++)
#define rrep(i,a,b) for(int i=a;i>=b;i--)


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

if(M<=L) {
    cout<<0<<endl;
    return 0;
  }

  vector<ll> t(M+1,1);
  for(ll i=1;i<=M;i++) {
    t[i]=t[i-1]*i;
    t[i]%=M;
  }

  ll s=0;
  ll now=1;
  for(ll i=1;i<=L;i++) {
    now*=t[i];
    now%=M;
  }
  s+=now;
  s%=M;

  for(ll i=L+1;i<=min(R,M-1);i++) {
now*=t[i];
now%=M;
s+=now;
  s%=M;
  }

  cout<<s<<endl;
}