#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define llong long long

int main() {
    llong n;
    cin >> n;

    int i = (int)sqrt(n);
    if(n == 1) {
        cout << "YES\n";
        cout << n << "\n";
    } else if((llong)i*(i+1) / 2 == n) {
        cout << "YES\n";
        cout << i << "\n";
    } else if((llong)(i+1)*(i+2) / 2 == n) {
        cout << "YES\n";
        cout << i+1 << "\n";
    } else {
        cout << "NO\n";
    }
}