#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i,n) for (int i=0;i<(int)(n);i++)

int main(){
  ll a,b;
  cin>>a>>b;
  b=abs(b);
  if(a<b) cout<<"Yes"<<endl;
  else cout<<"No"<<endl;
}