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  1. #include <iostream>
  2. #include <string>
  3. using namespace std;
  4.  
  5. string f(string x) {
  6. 	int mult = 1;
  7. 	for (int i = 0; i < x.length(); i++) {
  8. 		mult *= int(x.at(i)) - int('0');
  9. 	}
  10. 	string result = to_string(mult);
  11. 	return result;
  12. }
  13.  
  14. int main() {
  15. 	string inp;
  16. 	while (cin >> inp) {
  17. 		int count = 0;
  18. 		while (inp.length() > 1) {
  19. 			inp = f(inp);
  20. 			count++;
  21. 		}
  22. 		cout << count << endl;
  23. 	}
  24. 	return 0;
  25. }
Success #stdin #stdout 0s 15240KB
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https://ideone.com/CzjjdG
language:
C++ (gcc 8.3)
created:
5 years ago
visibility:
public

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