#include "bits/stdc++.h"
using namespace std;
     
#define DEBUG(x) cout<<#x<<": "<<x<<endl;
#define DEBUG_VEC(v) cout<<#v<<":";for(int i=0;i<v.size();i++) cout<<" "<<v[i]; cout<<endl
     
typedef long long ll;
#define vi vector<int>
#define vl vector<ll>
#define vii vector< vector<int> >
#define vll vector< vector<ll> >
#define vs vector<string>
#define pii pair<int,int>
#define pis pair<int,string>
#define psi pair<string,int>
const int inf = 1000000001;
const ll INF = 1e16;
#define MOD 1000000007
#define mod 1000000009
#define pi 3.14159265358979323846
#define Sp(p) cout<<setprecision(15)<<fixed<<p<<endl;
int dx[4] = { 1,0,-1,0 }, dy[4] = { 0,1,0,-1 };
int dx2[8] = { 1,1,0,-1,-1,-1,0,1 }, dy2[8] = { 0,1,1,1,0,-1,-1,-1 };


int main() {
  bool dp[4][20][20];
  int i, j, k;
  for (i = 0; i < 4; i++) {
    for (j = 0; j < 20; j++) {
      for (k = 0; k < 20; k++) {
	dp[i][j][k] = false;
      }
    }
  }
  dp[0][10][10] = true;
  int dx3[8] = {-2, -2, -1, -1, 1, 1, 2, 2};
  int dy3[8] = {-1, 1, -2, 2, -2, 2, -1, 1};
  for (i = 0; i < 3; i++) {
    for (j = 0; j < 20; j++) {
      for (k = 0; k < 20; k++) {
	if (dp[i][j][k]) {
	  for (int i2 = 0; i2 < 8; i2++) {
	    dp[i + 1][j + dx3[i2]][k + dy3[i2]] = true;
	  }
	}
      }
    }
  }
  ll x, y;
  cin >> x >> y;
  x += 10; y += 10;
  if (x >= 0 && x < 20 && y >= 0 && y < 20) {
    for (int i = 0; i < 4; i++) {
      if (dp[i][x][y]) {
	cout << "YES" << endl;
	return 0;
      }
    }
  }
  cout << "NO" << endl;
  return 0;
}