fn main() {
    println!("{}", solve());
}

fn solve() -> usize {
    let (l, r, m) = {
        let mut line = String::new();
        std::io::stdin().read_line(&mut line).unwrap();
        let mut iter = line.split_whitespace();
        (
            iter.next().unwrap().parse::<usize>().unwrap(),
            iter.next().unwrap().parse::<usize>().unwrap(),
            iter.next().unwrap().parse::<usize>().unwrap(),
        )
    };

    if l >= m {
        return 0;
    }

    let mut fac = vec![1];
    for i in 1..=r.min(m - 1) {
        fac.push(*fac.last().unwrap() * i % m);
    }

    let mut ret = 0;
    let mut mul = 1;

    for i in 0..l {
        mul = mul * fac[i] % m;
    }

    for i in l..=r.min(m - 1) {
        mul = mul * fac[i] % m;
        ret = (ret + mul) % m;
    }

    ret
}