func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int x, d;     cin >> x >> d;     long long start = 1;     vector<long long> arr;     while (x > 0) {       int toPrint = 1;       while ((1LL << toPrint) - 1 <= x) toPrint++;       toPrint--;       for (long long i = start; i < start + toPrint; i++) arr.push_back(start);       start += toPrint + d + 1;       x -= ((1LL << toPrint) - 1);     }     if (arr.size() > 1e4 || start >= 1e18) {       cout <<  -1 ;       return 0;     }     cout << arr.size() << endl;     for (int i = 0; i < arr.size(); i++) cout << arr[i] <<    ;   }   