#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf32 1000000001
#define Inf64 2000000000000000005



int main(){
	
	long long L,R,M;
	cin>>L>>R>>M;
	
	mint::set_mod(M);
	
	mint cur = 1;
	mint ans = 0;
	mint mul = 1;
	long long cc = L;
	for(int i=1;i<=M;i++){
		cur *= i;
		mul *= cur;
		if(L<=i && i<=R){
			ans += mul;
			cc++;
			if(cc>R)break;
		}
	}
	
	cout<<(ans).val()<<endl;
	
    return 0;
}