#include <iostream>
#include <cmath>
using namespace std;
int main()
{
    long long n, d = 0;
    freopen("power.in","r",stdin);
    freopen("power.out","w",stdout);
    cin >> n;
    long long a[30];
        for (long long i = 30; i >= 1; i --)
    {
        long long b = pow(2, i);
        if (n >= b)
        {
            a[d ++] = b;
            n -= b;
        }
    }
    if (n == 0)
    {
        for (long long i = 0; i < d - 1; i ++)
        {
            cout << a[i] << ' ';
        }
        cout << a[d - 1];
    }
    else
    {
        cout << "-1";
    }
    return 0;
}

帮看看哪里有问题？