#include "bits/stdc++.h"
using namespace std;

typedef long long ll;
ll x, y;

int dx[] = { 2,1,-1,-2,-2,-1,1,2 };
int dy[] = { 1,2,2,1,-1,-2,-2,-1 };
bool f=false;

bool dfs(int sx, int sy, int depth) {
	if (sx == x && sy == y) {
		return true;
	}
	if (depth == 3) {
		return false;
	}

	for (int i = 0; i < 8; i++) {
		f |= dfs(sx+dx[i],sy+dy[i],depth+1);
	}

	return f;
}

int main() {
	cin >> x >> y;

	cout << (dfs(0,0,0)?"YES":"NO") << endl;
}