#include using namespace std; using ll = long long; using pll = pair; #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 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; }