fn main() {
	let mut s = String::new();
	std::io::stdin().read_line(&mut s).ok();
	let mut itr = s.trim().split_whitespace();
	let l: usize = itr.next().unwrap().parse().unwrap();
	let r: usize = itr.next().unwrap().parse().unwrap();	
	let m: usize = itr.next().unwrap().parse().unwrap();	

	let fact = |x| {
		let mut y = 1;
		for i in 1..=x { y *= i; }
		y
	};

	let mut ans: usize = 0;
	for i in l..=r {
		let mut x = 1;
			for j in 1..=i { x = x % m * fact(j); }
		ans = (ans + x) % m;
		if x % m == 0 { break; }
	}

	println!("{}", ans);
}