const MOD: usize = 998244353; fn power(base: usize, times: usize) -> usize { if times == 0 { return 1usize; } if times == 1 { return base; } let temp = power(base, times/2); temp * temp % MOD * power(base, times%2) % MOD } fn main() { let mut nm = String::new(); std::io::stdin().read_line(&mut nm).ok(); let nm: Vec = nm.trim().split_whitespace().map(|s| s.parse().unwrap()).collect(); let n = nm[0]; let m = nm[1]; let mut a = String::new(); std::io::stdin().read_line(&mut a).ok(); let a: Vec = a.trim().split_whitespace().map(|s| s.parse().unwrap()).collect(); let mut b = String::new(); std::io::stdin().read_line(&mut b).ok(); let b: Vec = b.trim().split_whitespace().map(|s| s.parse().unwrap()).collect(); let left = a.into_iter().fold(0usize, |x, y| x ^ y); let right = b.into_iter().fold(0usize, |x, y| x ^ y); if left ^ right == 0 { println!("{}", power(2, 20*(n-1)*(m-1))); } else { println!("0"); } }