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: Wrong Answer)

#include <bits/stdc++.h>
using namespace std;
#define modulo 1000000007
#define mod(mod_x) ((((long long)mod_x+modulo))%modulo)
#define Inf 1000000000


int main(){

	int N;
	cin>>N;
	
	int k = -1;
	
	for(int i=1;i<=1000;i++){
		if((i-1)*i/2==N){
			k = i;
			break;
		}
	}
	
	if(k==-1){
		cout<<-1<<endl;
		return 0;
	}
	
	cout<<k<<endl;
	
	vector<vector<int>> ans(k,vector<int>());
	
	int now = 0;
	
	for(int i=0;i<k;i++){
		for(int j=0;j<k-1-i;j++){
			ans[i].push_back(now);
			now++;
		}
	}
	
	for(int i=0;i<k-1;i++){
		for(int j=0;j<k-1-i;j++){
			ans[i+1+j].push_back(ans[i][j]);
		}
	}
	
	for(int i=0;i<k;i++){
		cout<<k-1;
		for(int j=0;j<k-1;j++){
			cout<<' ';
			cout<<ans[i][j]+1;
		}
		cout<<endl;
	}
	
	
	
	return 0;
}