1988C.cpp

#include <bits/stdc++.h>
#define pb push_back
#define fr first
#define sc second
#define mod 1000000007
#define mod2 998244353
#define len(x) x.size()
#define min3(a,b,c) min(a, min(b,c))
#define max3(a,b,c) max(a, max(b,c))
#define all(v) v.begin(), v.end()
#define rep(i,a,b) for(int i=a;i<b;i++)
#define per(i,a,b) for(int i=b-1,i>=a;i--)
#define int  long long
#define endl " \n"
using namespace std;
// Make sure to have 1 as 1ll for more than 32 bits
// Make sure to have seprate variables in nested loops
// Make sure minimum initialisation are large enough
// Make sure to use values before reinitilaising them such as count or sum
typedef unsigned long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<pii> vpii;
typedef vector<vi> vvii;
typedef vector<string> vs;
int32_t main(){
    int t;cin >> t;
    while(t--){
        int n ;cin >> n;
        bitset<64>b(n);
        if(b.count() == 1){
            cout << 1 << endl << n << endl;
        }
        else{
        cout << b.count() + 1 << endl;
        for(int i = 63 ;i >= 0;i--){
            if(b[i] == 1){
                bitset<64>b1(n);
                b1[i] = 0;
                cout << b1.to_ullong() << " ";
            }
        }
        cout << n << endl;
        }
    }
}