#define _USE_MATH_DEFINES
#include <algorithm>
#include <cstdio>
#include <functional>
#include <iostream>
#include <cfloat>
#include <climits>
#include <cstring>
#include <cmath>
#include <map>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <time.h>
#include <vector>
using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> i_i;
typedef pair<ll, int> ll_i;
typedef pair<double, int> d_i;
typedef pair<ll, ll> ll_ll;
typedef pair<double, double> d_d;
struct edge { int u, v; ll w; };

ll MOD = 1000000007;
ll _MOD = 1000000009;
double EPS = 1e-10;
int INF = INT_MAX / 3;

int dx[9] = {0, -2, -2, -1, -1, 1, 1, 2, 2};
int dy[9] = {0, -1, 1, -2, 2, -2, 2, -1, 1};

int main() {
	int X, Y; cin >> X >> Y;
	for (int z = 0; z < 729; z++) {
		int _z = z;
		int x = 0, y = 0;
		for (int t = 0; t < 3; t++) {
			int i = _z % 9;
			_z /= 9;
			x += dx[i];
			y += dy[i];
		}
		if (x == X && y == Y) {
			cout << "YES" << endl;
			return 0;
		}
	}
	cout << "NO" << endl;
}