use std::io::*; use std::str::FromStr; fn read() -> T { let stdin = stdin(); let stdin = stdin.lock(); let token: String = stdin .bytes() .map(|c| c.expect("failed to read char") as char) .skip_while(|c| c.is_whitespace()) .take_while(|c| !c.is_whitespace()) .collect(); token.parse().ok().expect("failed to parse token") } fn main() { let n: usize = read(); let k: usize = read(); if (n / k) % 2 == 1 { println!("No"); return; } let m = n / k; let mut ans = vec![vec![0; m]; k]; for i in 0..m { for j in 0..k { let jj = if i % 2 == 1 { m-1-j } else { j }; ans[jj][i] = i * k + j + 1; } } println!("Yes"); for i in 0..m { print!("{}", ans[i][0]); for j in 1..k { print!(" {}", ans[i][j]); } print!("\n"); } }