#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 lb = -1, ub = n;
    while (ub - lb > 1) {
        int mid = (lb + ub) / 2;
        if (mid * (mid + 1) >= 2 * n) {
            ub = mid;
        } else {
            lb = mid;
        }
    }
    if (ub * (ub + 1) == 2 * n) {
        cout << "YES" << endl << ub << endl;
    } else {
        cout << "NO" << endl;
    }
    return 0;
}