#include <bits/stdc++.h>
using namespace std;
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n) FOR(i,0,n)
#define ALL(v) begin(v),end(v)
template<typename A, typename B> inline bool chmax(A & a, const B & b) { if (a < b) { a = b; return true; } return false; }
template<typename A, typename B> inline bool chmin(A & a, const B & b) { if (a > b) { a = b; return true; } return false; }
using ll = long long;
using pii = pair<int, int>;
constexpr ll INF = 1ll<<30;
constexpr ll longINF = 1ll<<60;
constexpr ll MOD = 1000000007;
constexpr bool debug = false;
//---------------------------------//

int main() {
	ll N;
	cin >> N;
	ll l = 0, r = 2ll * INF;
	while (r - l > 1) {
		ll m = l + r >> 1;
		if (m * (1 + m) / 2 >= N) r = m;
		else l = m;
	}
	if (r * (r + 1) / 2 == N) {
		puts("YES");
		cout << r << endl;
	}
	else puts("NO");
}