#include<bits/stdc++.h>
using namespace std;

int main(){
 int N,K,T;
 cin>> N>>K>>T;
  
  
 if(K*T>=N && N>0)
    cout<<"Yes"<<endl;
  else if(K*T>=(-1)*N && N<0)
    cout<<"Yes"<<endl;
  else cout<<"No"<<endl;

 return 0;
}