#include<bits/stdc++.h>
typedef long long ll;
using namespace std;
int INF = 1LL << 30;
int MOD = 1e9+7;
main(){
    ll N;
    cin >> N;
    ll i;
    for(i = sqrt(N*2);i * (i+1) < N*2;i++){}
    if(i * (i+1) / 2 == N){
        cout << "YES" << endl;
        cout << i << endl;
    }else{
        cout << "NO" << endl;
    }
}