import java.util.Scanner;

class Main{
    public static void main(String[] args){
        Scanner sc=new Scanner(System.in);
        long n=sc.nextLong(),t;
        sc.close();
        t=(long)Math.sqrt(2*n);
        if(n==(t*(t+1))/2)System.out.print("YES\n"+t);
        else System.out.print("NO");
    }
}