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

int main() {
    ll A,B;
    cin >> A >> B;
    if(abs(A) < abs(B))cout << "Yes" << endl;
    else cout << "No" << endl;
}
//(log4)*2 == log16