#[allow(unused_imports)] use std::cmp::*; #[allow(unused_imports)] use std::collections::*; // https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8 macro_rules! input { ($($r:tt)*) => { let stdin = std::io::stdin(); let mut bytes = std::io::Read::bytes(std::io::BufReader::new(stdin.lock())); let mut next = move || -> String{ bytes.by_ref().map(|r|r.unwrap() as char) .skip_while(|c|c.is_whitespace()) .take_while(|c|!c.is_whitespace()) .collect() }; input_inner!{next, $($r)*} }; } macro_rules! input_inner { ($next:expr) => {}; ($next:expr,) => {}; ($next:expr, $var:ident : $t:tt $($r:tt)*) => { let $var = read_value!($next, $t); input_inner!{$next $($r)*} }; } macro_rules! read_value { ($next:expr, [ $t:tt ; $len:expr ]) => { (0..$len).map(|_| read_value!($next, $t)).collect::>() }; ($next:expr, $t:ty) => ($next().parse::<$t>().expect("Parse error")); } #[inline] fn madd(a: &mut i64, b: i64, m: i64) { let mut r = *a + b; if r >= m { r -= m; } *a = r } fn main() { input! { n: usize, b: i64, a: [[i64; n]; n], } let mut ac = vec![vec![0; n]; n]; for i in 0..n { for j in 0..n { ac[i][j] = a[i][j] % b; } } let mut dp = vec![[0; 2]; 1 << n]; dp[0][0] += 1; for i in 0..n { let mut ep = vec![[0; 2]; 1 << n]; for bits in 0usize..1 << n { if dp[bits] == [0; 2] { continue; } for j in 0..n { if (bits & 1 << j) != 0 { continue; } let flip = (bits & ((1 << n) - (1 << (j + 1)))).count_ones() % 2; let flip = flip as usize; for c in 0..2 { let val = dp[bits][c] * ac[i][j] % b; madd(&mut ep[bits | 1 << j][c ^ flip], val, b); } } } dp = ep; } println!("{}", dp[(1 << n) - 1][1]); }