#include<cstdio>
int n,i,j,p,nr,v[110];
int main(){
    scanf("%d",&n);
    p=1;
    while(p<=n){
        v[++nr]=p;
        p*=2;
    }
    printf("%d\n",nr);
    for(i=1;i<=nr;i++){
        printf("%d ",v[i]);
    }




    return 0;
}