#include <algorithm>
#include <vector>
#include <cfloat>
#include <string>
#include <cmath>
#include <set>
#include <cstdlib>
#include <map>
#include <ctime>
#include <iomanip>
#include <functional>
#include <deque>
#include <iostream>
#include <cstring>
#include <queue>
#include <cstdio>
#include <stack>
#include <climits>
#include <sys/time.h>
#include <cctype>

using namespace std;

typedef long long ll;


int main() {
  double p, q;
  cin >> p >> q;
  if (1e-9 <= 2*p-p*q-1) {
    std::cout << "YES" << std::endl;
  }else {
    std::cout << "NO" << std::endl;
  }
}