#include<iostream>
using namespace std;
long n,f,l;
main()
{
	cin>>n;l=2e9;
	for(int i=0;i<99;i++)
	{
		long m=f+l>>1;
		if(m*(m+1)/2<n)f=m;
		else l=m;
	}
	if(l*(l+1)/2==n)
	{
		cout<<"YES\n"<<l<<endl;
	}
	else cout<<"NO"<<endl;
}