#include <iostream>

int main () {
	
	long long n;
	std::cin >> n;

	long long mid, total;
	long long lb = 0, ub = 1e10;

	long long ans = 0;
	while (lb + 1 < ub) {
		mid = (lb + ub) >> 1;
		total = mid * (mid + 1) >> 1;
		if (total == n) {
			ans = mid;
			break;
		} else if (total > n) {
			ub = mid;
		} else {
			lb = mid;
		}
	}
	std::cout << (ans ? "YES" : "NO") << std::endl;
	if (ans) std::cout << ans << std::endl;
}