#include<bits/stdc++.h> using namespace std; int main(){ int n; cin>>n; if(n>0){ cout<<"yes"; }else{ cout<<"no"; } return 0; }

#include using namespace std; int main(){ int n; cin>>n; if(n>0){ cout<<"yes"; }else{ cout<<"no";

}

return 0;}

#include using namespace std; int main(){ int n; cin>>n; if(n>0){ cout<<"yes"; }else{ cout<<"no";

}

return 0;}

#include using namespace std; int main(){

int n;
cin>>n;
if(n>0){
	cout<<"yes"; 
}else{
	cout<<"no";
	
	
	
}
	

	
return 0;

}