#pragma GCC target("avx")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include<iostream>
using namespace std;
using i32 = int_fast32_t;
using i64 = int_fast64_t;
#define rep(i, n) for (i32 i = 0; i < (i32)(n); i++)
#define all(a) (a).begin(),(a).end()
#define rall(a) (a).rbegin(),(a).rend()
using P = pair<i64,i64>;

int main(){
ios::sync_with_stdio(false);
std::cin.tie(nullptr);
i64 n;
cin >> n;
for(i32 i = 1; ; i++){
    i64 sum = i * (i + 1) / 2;
    if(sum == n){
        cout << "YES" << endl;
        cout << i << endl;
        return 0;
    }else{
        if(n < sum){
            cout << "NO" << endl;
            return 0;
        }
    }
}
}