#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <utility>
#include <atcoder/modint>
using namespace std;
using i32 = int32_t;
using u32 = uint32_t;
using i64 = int64_t;
using u64 = uint64_t;
#define rep(i,n) for(int i=0; i<(int)(n); i++)
const i64 INF = 1001001001001001001;

using Modint = atcoder::dynamic_modint<998244353>;

int main(){
    i64 L, R; cin >> L >> R; R++;
    int M; cin >> M;
    Modint::set_mod(M);
    R = min<i64>(R, M);
    L = min<i64>(L, M);
    Modint ans = 0;
    vector<Modint> F(M);
    F[0] = 1;
    for(int i=1; i<M; i++) F[i] = F[i-1] * Modint::raw(i);
    vector<Modint> FF(M+1);
    FF[0] = 1;
    for(int i=1; i<=M; i++) FF[i] = FF[i-1] * F[i];
    for(i64 a=L; a<R; a++){
        ans += FF[a];
    }
    cout << ans.val() << endl;
    return 0;
}



struct ios_do_not_sync{
    ios_do_not_sync(){
        ios::sync_with_stdio(false);
        cin.tie(nullptr);
    }
} ios_do_not_sync_instance;