import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        long N = sc.nextLong();
        boolean c = true;
        int x=(int)Math.sqrt(2*N);
        if(x*(x+1)==2*N){
            System.out.println("YES\n" + x);
        } else {
            System.out.println("NO");
        }
    }
}