#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint998244353;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf 1000000001


int main() {
    
	long long a,b;
	cin>>a>>b;
	
	b = abs(b);
	
	if(a<b)cout<<"Yes"<<endl;
	else cout<<"No"<<endl;
	
    return 0;
}