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#include<bits/stdc++.h>
using namespace std;
unsigned int countSetBits(unsigned int n)
{
    unsigned int count = 0;
    while (n) {
        count += n & 1;
        n >>= 1;
    }
    return count;
}
int sum(int n){
    int s=0;
    for(int i=1;i<=n;i++){
        s+=countSetBits(i);
    }
    return s;
}
int wyn(int n){
    int p,k,sr;
    p=1;k=n;
    sr=(p+k)>>1;
    while(p<k){
        if(sum(sr)>=n){
            k=sr;
        }
        else{
            p=sr+1;
        }
        sr=(p+k)>>1;
    }
    return p;
}
bool banned[1000000];
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie();
    cout.tie();
    int n,i,w,s=0,ile=0;
    cin>>n;
    w=wyn(n);
    for(i=1;i<=w;i++){
        s+=countSetBits(i);
    }
    i=w-1;
    //cout<<"s:"<<s<<" n:"<<n<<"\n";
    while(s-n>0){
        if(countSetBits(i)<=s-n){
            banned[i]=1;
            ile++;
            s-=countSetBits(i);
        }
        i--;
    }
    cout<<w-ile<<"\n";
    for(i=w;i>0;i--){
        if(!banned[i])
            cout<<i<<" ";
    }

}