#include<bits/stdc++.h>
#include<algorithm>
using namespace std;
using ll=long long;

int main(){
    ll n,k,t;
    cin >> n >> k >> t;
    if(abs(n)%k==0 && abs(n)/k<=t){
        cout << "Yes" << endl;
    }
    else if(abs(n)/k<t){
        cout << "Yes" << endl;
    }
    else{
        cout << "No" << endl;
    }
    return 0;
}