#include <iostream>
#include <algorithm>
#include <vector>
#include <string>
#include <map>
#include <set>
#include <fstream>
#include <cmath>
#include <stack>
#include <queue>
#include <iomanip>
using namespace std;

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