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  1. #include <iostream>
  2.  
  3. int main ()
  4. {
  5. int x;
  6. std::string result;
  7.  
  8. std::cin >> x;
  9.  
  10. do {
  11. result.insert(0, 1, x % 2 ? '1' : '0');
  12. } while (x >>= 1);
  13.  
  14. std::cout << result;
  15.  
  16. return 0;
  17. }
Success #stdin #stdout 0s 16064KB
stdin
16
stdout
10000