大佬求调 30pts

#include<bits/stdc++.h>
#define int long long
using namespace std;
int b[30];
signed main(){
    int a[32];a[1]=1;
    for(int i=2;i<=30;i++)
		a[i]=a[i-1]*2;cout<<a[i]<<endl;
    int n;cin>>n;
    if(n%2==1)cout<<-1;return 0;
    for(int i=30;i>=2;i--){
        if(n>=a[i])
			n-=a[i];b[i]=a[31-i];
			cout<<i+1<<" ";
    }
    for(int i=1;i<=30;i++){
        if(b[i]!=0)cout<<i+1<<" ";
    }
    return 0;
}