#include<iostream>
#include<string>
#include<cmath>

int main() {
	std::string yes = "YES";
	std::string no = "NO";
	std::string ans = "";
	std::int64_t a = 1;
	std::int64_t n = 0;
	std::cin >> n;
	ans = no;

	std::int64_t i = 2;
	/*for(i; i < INT_FAST32_MAX;i++) {
		if (n == a) {
			ans = yes;
			break;
		}
		a += i;
	}*/
	double k = 0;
	if (n < std::pow(10, 18)) {
		double x = sqrt(2 * n * 4 + 1);
		double y = 0;
		double x_p = 0;
		x_p = std::modf(x, &y);
		if (!(x_p > 0))
			ans = yes;

		k = x / 2 + 1 / 2;
	}
	std::cout << ans << std::endl;
	if (ans == yes)
		std::cout << std::to_string((std::uint64_t)k);
	//std::cout << std::to_string(i - 1);

	return 0;
}