Problem: We will call a string x good if it satisfies the following condition:

* Condition: x can be represented as a concatenation of two copies of another string y of length at least 1.



For example, `aa` and `bubobubo` are good; an empty string, `a`, `abcabcabc` and `abba` are not good.

Eagle and Owl created a puzzle on good strings. Find one string s that satisfies the following conditions. It can be proved that such a string always exists under the constraints in this problem.

* 1 ≤ |s| ≤ 200
* Each character of s is one of the 100 characters represented by the integers 1 through 100.
* Among the 2^{|s|} subsequences of s, exactly N are good strings.

Constraints

* 1 ≤ N ≤ 10^{12}

Input

Input is given from Standard Input in the following format:


N


Output

In the first line, print |s|, the length of s. In the second line, print the elements in s in order, with spaces in between. Any string that satisfies the above conditions will be accepted.

Examples

Input

7


Output

4
1 1 1 1


Input

299


Output

23
32 11 11 73 45 8 11 83 83 8 45 32 32 10 100 73 32 83 45 73 32 11 10

Solution (in CPP):

Solution:
#include <cstdio>

const int N=41;
int a[N],mx=-1,t;
long long n;

int main(){
	scanf("%lld",&n);
	for(int i=40;~i;--i)
		if((n>>i)&1)
			if(~mx)a[i]=mx+(++t);
			else mx=i;
	printf("%d\n",mx+mx+2+t+t);
	if(a[0])printf("%d ",a[0]);
	for(int i=1;i<=mx;++i){
		printf("%d ",i);
		if(a[i])printf("%d ",a[i]);
	}
	for(int i=1;i<=mx+t;++i)printf("%d ",i);
	printf("%d %d\n",mx+t+1,mx+t+1);
}