#include <iostream>
#include <vector>
#include <map>
#include <array>

using namespace std;
template<class T> int maxReturn(T a, T b) {if (a > b) {return a;} else {return b;}}
template<class T> int minReturn(T a, T b) {if (a < b) {return a;} else {return b;}}

int main(void){
    long long n, i, sheepCount;
    cin >> n;
    i = 1;
    sheepCount = 0;

    while(true) {
    	sheepCount += i;

    	if (sheepCount == n) {
    		cout << "YES" << endl << i << endl;
    		break;
    	}

    	if (sheepCount > n) {
    		cout << "NO" << endl;
    		break;
    	}

    	i++;
    }
}