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Jan 14th, 2020
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  1. #include<iostream>
  2. using std::cin;
  3. using std::cout;
  4. using std::endl;
  5.  
  6. bool hasUniqueDigits( unsigned n, unsigned m=0)
  7. {
  8. if(n >= 0 && n <= 9 && m == 0)
  9. {
  10. return true;
  11. }
  12. if(m&1<<(n%10))
  13. {
  14. return false;
  15. }
  16. else
  17. {
  18. m|=1<<(n%10);
  19. }
  20. return hasUniqueDigits(n/=10, m);
  21. }
  22.  
  23. int main()
  24. {
  25. char c;
  26. cin>>c;
  27. return 0;
  28. }
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