#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0; i<(n); i++)
typedef long long ll;

int main(){
	ll n,k,t; cin>>n>>k>>t;
	if(n<0){
		if(-t*k<=n) cout<<"Yes"<<endl;
		else cout<<"No"<<endl;
	}else{
		if(t*k>=n) cout<<"Yes"<<endl;
		else cout<<"No"<<endl;
	}
}