#include <iostream>
using namespace std;

long long int fac(long long int n, long long int m){
    if (n > 1) {
        n *= fac(n - 1, m);
        if (n >= m) {
            n %= m;
        }
        return n;
    } else {
        return 1;
    }
}

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

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

    long long int facto = 1, index = 2;
    while (facto != 0) {
        facto *= fac(index, M);
        if (facto >= M) {
            facto %= M;
        }
        index++;
    }

    long long int ans = 0;
    for (long long int i = L; i < index + 1; i++) {
        long long int a = 1;
        for (long long int j = 1; j <= i; j++) {
            a *= fac(j, M);
            if (a >= M) {
                a %= M;
            }
        }
        ans += a;
        if (ans >= M) {
            ans %= M;
        }
    }
    cout << ans << endl;
    return 0;
}