#include <bits/stdc++.h>


using namespace std;
typedef long long ll;

#define REP(i,n) for(ll i=0; i<ll(n); i++)
#define FOR(i,m,n) for(ll i=ll(m); i<ll(n); i++)
#define ALL(obj) (obj).begin(),(obj).end()
#define VI vector<int>
#define VP vector<pair<int,int>>
#define VPP vector<pair<int,pair<int,int>>>
#define VLL vector<long long>
#define VVI vector<vector<int>>
#define VVLL vector<vector<long long>>
#define VC vector<char>
#define VS vector<string>
#define VVC vector<vector<char>>
#define VB vector<bool>
#define VVB vector<vector<bool>>
#define fore(i,a) for(auto &i:a)
typedef pair <int, int> P;
template<typename T> using min_priority_queue = priority_queue<T, vector<T>, greater<T>>;

const int  INF = 1 << 29;
const ll INFL = 1LL << 60;
const ll mod = 1000000007;


int x, y;

VI dx = { -2,-2,-1,-1,1,1,2,2 };
VI dy = { -1,1,-2,2,-2,2,-1,1 };

void dfs(int a, int b, int cnt) {
	if (cnt > 3)return;
	if (a == x && b == y) {
		cout << "YES" << endl;
		exit(0);
	}
	REP(i, 8) {
		dfs(a + dx[i], b + dy[i], cnt + 1);
	}

}

int main() {
	cin >> x >> y;
	dfs(0, 0, 0);
	cout << "NO" << endl;
}