#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <limits.h>
#include <map>
#include <vector>
#include <deque>
#include <list>
#include <stack>
#include <queue>
#include <set>
#include <algorithm>
#include <iostream>
#include <iterator>
#include <memory>

using namespace std;

#if 1
#define PRINT(x) { cout << #x << ": " << (x) << endl; }
#define PRINT_CONTAINER(x)  { cout << #x << ": ";                       \
        for (size_t ix = 0; ix < (x).size(); ++ix) cout << (x)[ix] << ", "; \
        cout << endl; }
#else
#define PRINT(x)
#define PRINT_CONTAINER(x)
#endif

typedef pair<int, int> p;

typedef long long int ll;
ll n;

int main(int argc, char *argv[]) {
    scanf("%lld", &n);
    ll n2 = n * 2;
    ll m = sqrt(n2);
    for (ll i = m; i >= 0; --i) {
        ll v = i * (i + 1);
        if (n2 == v)
        {
            printf("YES\n%lld\n", i);
            return 0;
        }
        if (n2 > v)
        {
            printf("NO\n");
            return 0;
        }
    }
    printf("NO\n");
    return 0;
}