#include<bits/stdc++.h>
int m,c;
long long n;
int main()
{
    scanf("%lld",&n);
    while(n>>m)++m;--m;
    c=__builtin_popcountll(n)-1;
    printf("%d\n",m+c+1<<1),n^=1ll<<m;
    for(int i=1,j=1,k=m+c;j<=m||k>m;++i)
        printf("%d ",n>>j-1&1?n^=1ll<<j-1,k--:j++);
    for(int i=1;i<=m+c;++i)printf("%d ",i);
    printf("100 100\n");
    return 0;
}

### Prompt

Generate a cpp solution to the following 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

### Response

```cpp
#include<bits/stdc++.h>
int m,c;
long long n;
int main()
{
    scanf("%lld",&n);
    while(n>>m)++m;--m;
    c=__builtin_popcountll(n)-1;
    printf("%d\n",m+c+1<<1),n^=1ll<<m;
    for(int i=1,j=1,k=m+c;j<=m||k>m;++i)
        printf("%d ",n>>j-1&1?n^=1ll<<j-1,k--:j++);
    for(int i=1;i<=m+c;++i)printf("%d ",i);
    printf("100 100\n");
    return 0;
}

```