#include <iostream>
#include <string>
using namespace std;

int main() {
    int a,b,c,B,C;
    cin >> a >> b >> c;
    string ans;
    B = a/b;
    if(a%b != 0)B++;
    C = a/c;
    if(a%c != 0)C++;
    
    if(B * 2 >= C * 3)ans = "YES\n";
    else ans = "NO\n";
    cout << ans;
return 0;
}