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 Java8 (OpenJDK 1.8.0) (judge verdict: Accepted)

import java.util.Arrays;
import java.util.Scanner;

class Main{
	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		int unko=sc.nextInt();
		boolean ike=false;
		int N=0;
		for(int i=0; i<=500; i++) {
			if(unko==i*(i+1)/2) {
				ike=true;
				N=i;
				break;
			}
			else if(unko<i*(i+1)/2) {
				break;
			}
		}
		if(ike) {
			System.out.println("Yes");
			System.out.println(N+1);
			int[][] ary=new int[N+1][N];
			int[] kaz=new int[N+2];
			for(int i=0; i<=N; i++) {
				for(int j=0; j<N; j++) {
					ary[i][j]=0;
				}
			}
			for(int i=0; i<=N+1; i++) {
				kaz[i]=0;
			}
			int counter=1;
			for(int i=1; i<=N+1; i++) {
				for(int j=1; j<i; j++) {
					ary[i-1][kaz[i-1]]=counter;
					kaz[i-1]++;
					ary[j-1][kaz[j-1]]=counter;
					kaz[j-1]++;
					counter++;
				}
			}
			String buri="";
			for(int i=0; i<N+1; i++) {
				buri=Arrays.toString(ary[i]);
				buri=buri.replaceAll(",","");
				buri=buri.replace("["," ");
				buri=buri.replace("]","");
				System.out.println(N+buri);
			}
		}
		else {
			System.out.println("No");
		}
	}
}