#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for (ll i = 0; i < n; ++ i)
#define all(x) (x).begin(),(x).end()
using ll = long long ;
using P = pair<ll,ll>;
using PP = pair<ll,P>;
using vi = vector<ll>;
using vb = vector<bool>;
using vp = vector<P>;
using vii = vector<vi>;
const ll INF = (1<<30);
const int inf = 1001001001;
const int dx[4]={1,-1,0,0};
const int dy[4]={0,0,1,-1};
const ll mod=998244353;
int main(){
    ll a,b;
    cin >> a >> b;
    b = abs(b);
    if(a<b) cout<<"Yes"<<endl;
    else cout<<"No"<<endl;
}