#include <iostream>
#include <set>
#include <utility>

using namespace std;

const int dx[] = { -2, -2, -1, -1, 1, 1, 2, 2 };
const int dy[] = { 1, -1, 2, -2, 2, -2, 1, -1 };
set<pair<int, int> > reachables;

void step(int x, int y, int remain) {
	reachables.insert(make_pair(x, y));
	if (remain == 0) {
		return;
	}
	for (int i = 0; i < 8; ++i) {
		step(x + dx[i], y + dy[i], remain - 1);
	}
}

int main() {
	step(0, 0, 3);
	int x, y;
	cin >> x >> y;
	bool reachable = reachables.find(make_pair(x, y)) != reachables.end();
	cout << (reachable ? "YES" : "NO") << endl;
	return 0;
}