#include<bits/stdc++.h> using namespace std; int main() { double a,b,c,d; cin>> a >> b >> c >> d; double v = abc/1000.0; if(v >= d){ cout<< "Yes"; }else{ cout<< "No"; } }

#include<iostream> using namespace std; int main(){ int a,b,c,d; cin>>a>>b>>c>>d; if(abc>=d*1000) cout<<"Yes"; else cout<<"No"; }

#include <bits/stdc++.h> using namespace std; int a,b,c,d; int main(){ cin>>a>>b>>c>>d; if(abc>=d*1000) cout<<"Yes"; else cout<<"No"; }

#include <iostream> using namespace std; int main() { int a,b,c,d; cin >> a>> b >> c >>d; d*=1000; if(abc>=d)"Yes"; } else{{ cout << cout << "No"; } return 0; }

#include<iostream> using namespace std; int main(){ int a,b,c,n; cin>>a>>b>>c>>n; int d=n1000; if(ab*c>=d){ cout<<"Yes"; }else{ cout<<"No"; } }

#include<bits/stdc++.h> using namespace std; int main(){ int a,b,c,d; cin>>a>>b>>c>>d; if(abc>=d*1000){ cout<<"Yes"; } else{ cout<<"No"; } return 0; }

#include<iostream> using namespace std; int main(){ long long a,b,c,d; cin>>a>>b>>c>>d; if(abc>=d*1000){ cout<<"Yes"; } else{ cout<<"No"; } return 0; }