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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. string s, r = "";
  6. cin >> s;
  7. for (int i = 0; i < s.size(); i++) {
  8. bool f = false;
  9. for (int j = 0; j < r.size(); j++) {
  10. if (s[i] == r[j]) {
  11. f = true;
  12. break;
  13. }
  14. }
  15. if (!f) r += s[i];
  16. }
  17. cout << r;
  18. return 0;
  19. }
  20.  
Success #stdin #stdout 0.01s 5324KB
stdin
abcdabc223
stdout
abcd23