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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	map<string, bool> used;
  6. 	string S = "a";
  7. 	int k;
  8. 	cin >> k;
  9. 	for(int j = 1; ; j += 1){
  10. 		for(int i = 0; i < k; i += 1){
  11. 			string current = "aa";
  12. 			current[0] = S.back();
  13. 			current[1] = char('a' + i);
  14. 			if(!used[current]){
  15. 				S += char('a' + i);
  16. 				used[current] = true;
  17. 				break;
  18. 			}
  19. 		}
  20. 		if(S.size() != j+1) break;
  21. 	}
  22. 	cout << S;
  23. 	return 0;
  24. }
Success #stdin #stdout 0.01s 5516KB
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aabacadaeafa
https://ideone.com/OzND8z
language:
C++14 (gcc 8.3)
created:
1 year ago
visibility:
public

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