/* -*- coding: utf-8 -*-
 *
 * 2022.cc:  No.2022 Antilogarithm - yukicoder
 */

#include<cstdio>
#include<algorithm>
 
using namespace std;

/* constant */

/* typedef */

typedef long long ll;

/* global variables */

/* subroutines */

/* main */

int main() {
  ll a, b;
  scanf("%lld%lld", &a, &b);

  if (a < abs(b)) puts("Yes");
  else puts("No");
  return 0;
}