Problem:
Score : 500 points

Problem Statement

You are given an integer N. Determine if there exists a tuple of subsets of \{1,2,...N\}, (S_1,S_2,...,S_k), that satisfies the following conditions:

Each of the integers 1,2,...,N is contained in exactly two of the sets S_1,S_2,...,S_k.

Any two of the sets S_1,S_2,...,S_k have exactly one element in common.

If such a tuple exists, construct one such tuple.

Constraints

1 \leq N \leq 10^5

N is an integer.

Input

Input is given from Standard Input in the following format:

N

Output

If a tuple of subsets of \{1,2,...N\} that satisfies the conditions does not exist, print No.
If such a tuple exists, print Yes first, then print such subsets in the following format:

k
|S_1| S_{1,1} S_{1,2} ... S_{1,|S_1|}
:
|S_k| S_{k,1} S_{k,2} ... S_{k,|S_k|}

where S_i={S_{i,1},S_{i,2},...,S_{i,|S_i|}}.

If there are multiple such tuples, any of them will be accepted.

Sample Input 1

3

Sample Output 1

Yes
3
2 1 2
2 3 1
2 2 3

It can be seen that (S_1,S_2,S_3)=(\{1,2\},\{3,1\},\{2,3\}) satisfies the conditions.

Sample Input 2

4

Sample Output 2

No

Solution in C++14 (GCC 5.4.1) (judge verdict: Accepted)

#include <bits/stdc++.h>
using namespace std;
using ll=long long;

int main() {
    ll N;
    cin >> N;
    ll t=1;
    while(t*(t-1) < 2*N){
        t++;
    }
    if(t*(t-1) != 2*N){
        cout <<"No" << endl;
        return 0;
    }
    cout <<"Yes" << endl;
    cout <<t <<endl;
    vector<vector<ll>> ans(t);
    ll num =1;
    for(int i=0;i<t;i++){
        for(int j=(i+1);j<t;j++){
            ans[i].push_back(num);
            ans[j].push_back(num);
            num++;
        }
    }
    for(int i=0;i<t;i++){
        cout << ans[i].size() <<" ";
        for(int a:ans[i]){
            cout << a <<" ";
        }
        cout <<endl;
    }

    return 0;
}