#![allow(unused_mut, non_snake_case, unused_macros,unused_imports)] use std::cmp::{max, min, Ordering}; use std::mem::{swap}; use std::collections::{HashMap, HashSet, BinaryHeap, VecDeque}; use std::iter::FromIterator; // 高速 EOF要 //macro_rules! input {(source = $s:expr, $($r:tt)*) => {let mut iter = $s.split_whitespace();input_inner!{iter, $($r)*}};($($r:tt)*) => {let mut 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, usize1) => {read_value!($iter, usize) - 1};($iter:expr, $t:ty) => {$iter.next().unwrap().parse::<$t>().expect("Parse error")};} // 低速 EOF不要 macro_rules! input {(source = $s:expr, $($r:tt)*) => {let mut iter = $s.split_whitespace();let mut next = || { iter.next().unwrap() };input_inner!{next, $($r)*}};($($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),* )) => {( $(read_value!($next, $t)),* )};($next:expr, [ $t:tt ; $len:expr ]) => {(0..$len).map(|_| read_value!($next, $t)).collect::>()};($next:expr, chars) => {read_value!($next, String).chars().collect::>()};($next:expr, usize1) => {read_value!($next, usize) - 1};($next:expr, $t:ty) => {$next().parse::<$t>().expect("Parse error")};} /* 問題文============================================================ ================================================================= 解説============================================================= ================================================================ */ fn main(){ let dx = vec![-2,-2,-1,-1,1,1,2,2]; let dy = vec![-1,1,-2,2,-2,2,-1,1]; input!(X:i32,Y:i32); let mut q = VecDeque::new(); let mut h = HashSet::new(); h.insert(vec![0,0]); q.push_back(vec![0,0,0]); while !q.is_empty(){ let n = q.pop_front().unwrap(); let (x,y,d) = (n[0],n[1],n[2]); if d == 3{ continue; } for k in 0..8{ q.push_back(vec![x+dx[k],y+dy[k],d+1]); h.insert(vec![x+dx[k],y+dy[k]]); } } println!("{}",if h.contains(&vec![X,Y]) {"YES"} else {"NO"}); }