#include <bits/stdc++.h>
using namespace std;
using ll=long long;
#define int ll
#define rng(i,a,b) for(int i=int(a);i<int(b);i++)
#define rep(i,b) rng(i,0,b)
#define gnr(i,a,b) for(int i=int(b)-1;i>=int(a);i--)
#define per(i,b) gnr(i,0,b)
#define pb push_back
#define eb emplace_back
#define a first
#define b second
#define bg begin()
#define ed end()
#define all(x) x.bg,x.ed
#define si(x) int(x.size())
#ifdef LOCAL
#else
#define dmp(x) void(0)
#endif
template<class t,class u> void chmax(t&a,u b){if(a<b)a=b;}
template<class t,class u> void chmin(t&a,u b){if(b<a)a=b;}
template<class t> using vc=vector<t>;
template<class t> using vvc=vc<vc<t>>;
using pi=pair<int,int>;
using vi=vc<int>;
#define mp make_pair
#define mt make_tuple
#define one(x) memset(x,-1,sizeof(x))
#define zero(x) memset(x,0,sizeof(x))
#ifdef LOCAL
void dmpr(ostream&os){os<<endl;}
template<class T,class... Args>
void dmpr(ostream&os,const T&t,const Args&... args){
  os<<t<<
;
  dmpr(os,args...);
}
#define dmp2(...) dmpr(cerr,__LINE__,##__VA_ARGS__)
#else
#define dmp2(...) void(0)
#endif
using uint=unsigned;
using ull=unsigned long long;
template<class t,size_t n>
ostream& operator<<(ostream&os,const array<t,n>&a){
  return os<<vc<t>(all(a));
}
ll read(){
ll i;
  cin>>i;
  return i;
}
vi readvi(int n,int off=0){
  vi v(n);
  rep(i,n) v[i]=read()+off;
  return v;
}
pi readpi(int off=0){
  int a,b;cin>>a>>b;
  return pi(a+off,b+off);
}
template<class T>
void print(const vector<T>&v,int suc=1){
  rep(i,v.size())
    print(v[i],i==int(v.size())-1?suc:2);
}
string readString(){
  string s;
  cin>>s;
  return s;
}
template<class T>
T sq(const T& t){
  return t*t;
}
constexpr ll ten(int n){
  return n==0?1:ten(n-1)*10;
}
const ll infLL=LLONG_MAX/3;
#ifdef int
const int inf=infLL;
#else
const int inf=INT_MAX/2-100;
#endif
int topbit(signed t){
  return t==0?-1:31-__builtin_clz(t);
}
int topbit(ll t){
  return t==0?-1:63-__builtin_clzll(t);
}
int botbit(signed a){
  return a==0?32:__builtin_ctz(a);
}
int botbit(ll a){
  return a==0?64:__builtin_ctzll(a);
}
int popcount(signed t){
  return __builtin_popcount(t);
}
int popcount(ll t){
  return __builtin_popcountll(t);
}
bool ispow2(int i){
  return i&&(i&-i)==i;
}
ll mask(int i){
  return (ll(1)<<i)-1;
}
bool inc(int a,int b,int c){
  return a<=b&&b<=c;
}
template<class t> void mkuni(vc<t>&v){
  sort(all(v));
  v.erase(unique(all(v)),v.ed);
}
ll rand_int(ll l, ll r) { //[l, r]
  #ifdef LOCAL
  static mt19937_64 gen;
  #else
  static mt19937_64 gen(chrono::steady_clock::now().time_since_epoch().count());
  #endif
  return uniform_int_distribution<ll>(l, r)(gen);
}
template<class t>
void myshuffle(vc<t>&a){
  rep(i,si(a))swap(a[i],a[rand_int(0,i)]);
}
template<class t>
int lwb(const vc<t>&v,const t&a){
  return lower_bound(all(v),a)-v.bg;
}
int lcm(int a, int b)
{
  return a / __gcd(a, b) * b;
}
signed main(){
  cin.tie(0);
  ios::sync_with_stdio(0);
  cout<<fixed<<setprecision(20);
   int n,k,t; cin>>n>>k>>t;
   if(abs(n)/t>=k) cout<<"No"<<endl;
   else cout<<"Yes"<<endl;                              
                                 
                                 
}