package yuki183;

import java.util.Scanner;

public class C {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner sc = new Scanner(System.in);
		long n = sc.nextLong();
		double low = Math.sqrt(2*n)-1;
		double up = Math.sqrt(2*n);
		long init = (long)(low);
		for(long k=init-1; k<up+1; k++) {
			if(k*(k+1)==2*n) {
				System.out.println("YES"); System.out.println(k); return;
			}
		}
		System.out.println("NO");
	}
}