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  1. #include <iostream>
  2. #include <vector>
  3. #include <string>
  4.  
  5. using namespace std;
  6.  
  7. int main(void) {
  8. 	int roomNumber;
  9. 	vector<int> v;
  10. 	string s;
  11. 	int max = 0;
  12. 	cin >> roomNumber;
  13.  
  14. 	for (int i = 0; i < 10; ++i) {
  15. 		v.push_back(0);
  16. 	}
  17.  
  18. 	s = to_string(roomNumber);
  19.  
  20. 	for (int i = 0; i < s.length(); ++i) {
  21. 		v[s[i] - '0']++;
  22. 	}
  23.  
  24. 	if (v[6] > v[9]) {
  25. 		if (v[9] == 1) {
  26. 			v[6] = (v[6] / 2) + (v[6] % 2) + v[9];
  27. 		}
  28. 		else {
  29. 			v[6] = (v[6] / 2) + (v[6] % 2) + (v[9] / 2);
  30. 		}
  31. 	}
  32. 	else if (v[9] > v[6]) {
  33. 		if (v[6] == 1) {
  34. 			v[6] = v[6] + (v[9] / 2) + (v[9] % 2);
  35. 		}
  36. 		else {
  37. 			v[6] = (v[6] / 2) + (v[9] / 2) + (v[9] % 2);
  38. 		}
  39. 	}
  40.  
  41. 	for (int i = 0; i < 9; ++i) {
  42. 		if (v[i] > max) {
  43. 			max = v[i];
  44. 		}
  45. 	}
  46.  
  47. 	cout << max;
  48. }
Success #stdin #stdout 0.01s 5432KB
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https://ideone.com/EiMEGG
language:
C++14 (gcc 8.3)
created:
1 year ago
visibility:
secret

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