#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
using namespace std;

#define int long long

int dx[] = {1, 0, -1, 0, 1, -1, -1, 1};
int dy[] = {0, 1, 0, -1, 1, 1, -1, -1};

int n;

signed main() {
    cin >> n;
    int p=(int)sqrt(2*n);
    if (p * (p + 1) == 2 * n) {
        cout << "YES" << endl << p << endl;
    } else {
        cout << "NO" << endl;
    }
    return 0;
}