#include <bits/stdc++.h>

using namespace std;

#define IO ios_base::sync_with_stdio(0);cin.tie(0);
#define endl '\n'

int main() {
    IO;
    long long a, b; cin >> a >> b;
    cout << (abs(a) < abs(b) ? "Yes" : "No") << endl;

    return 0;
}