#include <iostream>
using namespace std;

int main(){

    float d,t,s;
    
    cin>>d>>t>>s;

    float time = d/s;
    if (time > t){
        cout<<"No";
    }
    else{
        cout<<"Yes";
    }





}
#include <algorithm>
#include <cmath>
#include <cstring>
#include <iomanip>
#include <iostream>
#include <map>
#include <queue>
#include <set>
#include <stack>
#include <string>
#include <vector>
using namespace std;
#define rep(i, n) for(int i = 0; (i) < (n); (i)++)
#define FOR(i, m, n) for(int i = (m); (i) < (n); (i)++)
#define All(v) (v).begin(), (v).end()
#define MP make_pair
#define pb push_back
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
const int INF = 1 << 30;
const ll LINF = 1LL << 61;
const int MOD = 1e9 + 7;

int main() {
    int N, H, W;
    cin >> N >> H >> W;
    cout << (N - W + 1) * (N - H + 1) << endl;
    return 0;
}