#include <bits/stdc++.h>
using namespace std;
using namespace chrono;
#if __has_include(<atcoder/all>)
#include <atcoder/all>
using namespace atcoder;
#endif

int main() {
    int64_t a, b;
    cin >> a >> b;

    cout << ((a < abs(b)) ? "Yes" : "No") << endl;

    return 0;
}