#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <climits>
#include <cmath>
#include <string>
#include <vector>
#include <algorithm>
#include <queue>
#include <map>
#include <functional>
#include <set>
#include <numeric>
#include <stack>
#include <utility>
#include <time.h>
//#include "util.h"

using namespace std;
typedef unsigned uint;
typedef long long ll;
typedef unsigned long long ull;



//呪文
template <typename _KTy, typename _Ty> ostream& operator << (ostream& ostr, const pair<_KTy, _Ty>& m) { cout << "{" << m.first << ", " << m.second << "}"; return ostr; }
template <typename _KTy, typename _Ty> ostream& operator << (ostream& ostr, const map<_KTy, _Ty>& m) { if (m.empty()) { cout << "{ }"; return ostr;	} cout << "{" << *m.begin(); for (auto itr = ++m.begin(); itr != m.end(); itr++) { cout << ", " << *itr; } cout << "}"; return ostr; }
template <typename _Ty> ostream& operator << (ostream& ostr, const vector<_Ty>& v) { if (v.empty()) { cout << "{ }"; return ostr; }	cout << "{" << v.front(); for (auto itr = ++v.begin(); itr != v.end(); itr++) { cout << ", " << *itr; }	cout << "}"; return ostr; }
template <typename _Ty> ostream& operator << (ostream& ostr, const set<_Ty>& s) { if (s.empty()) { cout << "{ }"; return ostr; } cout << "{" << *(s.begin()); for (auto itr = ++s.begin(); itr != s.end(); itr++) { cout << ", " << *itr; }	cout << "}"; return ostr; }
#define PI 3.14159265358979323846
#define EPS 1e-6
#define MIN(a,b) ((a)<(b)?(a):(b))
#define MAX(a,b) ((a)>(b)?(a):(b))
#define all(x) (x).begin(), (x).end()


// (x, y)
typedef pair<int, int> pii;
// (step, (x, y))
typedef pair<int, pii> pi3;

// ナイトの移動方向 8 通り
const int dx[] = { -2, -2, -1, -1, 1, 1, 2, 2 };
const int dy[] = { -1, 1, -2, 2, -2, 2, -1, 1 };

int yuki0240()
{
	stack<pi3> st;
	set<pii> movable;

	st.push(pi3(0, pii(0, 0)));

	while (!st.empty()) {

		pi3 t = st.top(); st.pop();

		movable.insert(t.second);

		if (t.first == 3) continue;

		int x = t.second.first;
		int y = t.second.second;

		for (int d = 0; d < 8; d++) {

			int cx = x + dx[d];
			int cy = y + dy[d];

			st.push(pi3(t.first + 1, pii(cx, cy)));

		}

	}

	int X, Y;
	cin >> X >> Y;

	cout << ( ( movable.find(pii(X, Y)) != movable.end() ) ? "YES" : "NO") << endl;

	return 0;
}

int main()
{
	//clock_t start, end;
	//start = clock();

	yuki0240();
	
	//end = clock();
	//printf("%d msec.\n", end - start);

	return 0;
}