#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<(n);++i)
#define all(a) (a).begin(),(a).end()
#define dunk(a) cout << (a) << endl
using namespace std;
typedef long long ll;

int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	ll n;
	cin >> n;
	ll m = floor(sqrt(2 * n));
	if (m * (m + 1) == 2 * n) {
		dunk("YES");
		dunk(m);
	}
	else dunk("NO");
	return 0;
}