#include <bits/stdc++.h>

#define rep(i, n) for (int (i) = 0; (i) < (int)(n); (i)++)

const int dx[] = {1, 0, -1, 0};
const int dy[] = {0, 1, 0, -1};
using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef pair<int, int> pii;

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    int a, b, c;
    cin >> a ;
    cin >> b ;
    cin >> c ;
    int cntb = 0, cntc = 0;
    {
        int now = 0;
        while (now < a) {
            now += b;
            cntb++;
        }
    }
    {
        int now = 0;
        while (now < a) {
            now += c;
            cntc++;
        }
    }
    if (cntc*3 <= cntb*2) cout << "YES" << endl;
    else cout << "NO" << endl;
    return 0;
}