// ---------- begin input macro ---------- // reference: https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8 macro_rules! input { (source = $s:expr, $($r:tt)*) => { let mut iter = $s.split_whitespace(); input_inner!{iter, $($r)*} }; ($($r:tt)*) => { let s = { use std::io::Read; let mut s = String::new(); std::io::stdin().read_to_string(&mut s).unwrap(); s }; let mut iter = s.split_whitespace(); input_inner!{iter, $($r)*} }; } macro_rules! input_inner { ($iter:expr) => {}; ($iter:expr, ) => {}; ($iter:expr, $var:ident : $t:tt $($r:tt)*) => { let $var = read_value!($iter, $t); input_inner!{$iter $($r)*} }; } macro_rules! read_value { ($iter:expr, ( $($t:tt),* )) => { ( $(read_value!($iter, $t)),* ) }; ($iter:expr, [ $t:tt ; $len:expr ]) => { (0..$len).map(|_| read_value!($iter, $t)).collect::>() }; ($iter:expr, chars) => { read_value!($iter, String).chars().collect::>() }; ($iter:expr, bytes) => { read_value!($iter, String).bytes().collect::>() }; ($iter:expr, usize1) => { read_value!($iter, usize) - 1 }; ($iter:expr, $t:ty) => { $iter.next().unwrap().parse::<$t>().expect("Parse error") }; } // ---------- end input macro ---------- fn run() { input! { diff: usize, } let mut cost = vec![0usize; 1 << 16]; for (used, cost) in cost.iter_mut().enumerate() { for i in 1..4 { for j in 0..4 { *cost += (used >> (4 * i + j) & 1) ^ (used >> (4 * (i - 1) + j) & 1); } } for i in 0..4 { for j in 1..4 { *cost += (used >> (4 * i + j) & 1) ^ (used >> (4 * i + j - 1) & 1); } } } let mut dp = vec![[0u64; 216 + 1]; 1 << 16]; dp[0][0] = 1; for used in 0..(1 << 16) { let src = dp[used]; for j in 0..16 { if used >> j & 1 == 0 { let used = used | (1 << j); let cost = cost[used]; for (dp, src) in dp[used][cost..].iter_mut().zip(src.iter()) { *dp += *src; } } } } let ans = dp[(1 << 16) - 1][diff]; println!("{}", ans); } fn main() { run(); }