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  1. #include <iostream>
  2. #include <string>
  3. using namespace std;
  4.  
  5. string reverse(string s){
  6. 	string y;
  7. 	for (int i = 0; !s.empty(); i++){
  8. 		if (s.back() != '.'){
  9. 			y.push_back(s.back());
  10. 			s.pop_back();
  11. 		}
  12. 		if (s.back() == '.') s.pop_back();
  13. 	}
  14. 	return y;
  15. }
  16.  
  17. bool is_leap(int year){
  18. 	bool leap;
  19. 	if ((year % 400) == 0) leap = true;
  20. 	else if ((year % 100) == 0) leap = false;
  21. 	else if ((year % 4) == 0) leap = true;
  22. 	else leap = false;
  23. 	return leap;
  24. }
  25.  
  26. int get_days (int month, int year){
  27. 	int days;
  28. 	switch (month) {
  29. 		case 1:
  30. 		case 3:
  31. 		case 5:
  32. 		case 7:
  33. 		case 8:
  34. 		case 10:
  35. 		case 12:
  36. 		    days = 31;
  37. 		    break;
  38. 		case 4:
  39. 		case 6:
  40. 		case 9:
  41. 		case 11:
  42. 		    days = 30;
  43. 		    break;
  44. 		case 2:
  45. 			is_leap(year)?days = 29:days=28;
  46. 		    break;
  47. 		default:
  48. 		    days = -1;
  49.     }
  50.     return days;
  51. }
  52.  
  53. int main() {
  54. 	bool booly = false;
  55. 	string s,y;
  56. 	getline(cin, s);
  57. 	y = reverse(s);
  58. 	int day = stoi(y.substr(0,2));
  59. 	int month = stoi(y.substr(2,2));
  60. 	int year = stoi(y.substr(4,4));
  61. 	cout << (((month>=1)&&(month<=12)&&(day >= 1)&&(day <= (get_days(month, year))))?"YES":"NO");
  62.  
  63. 	return 0;
  64. }
Success #stdin #stdout 0s 3468KB
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20.12.2051
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YES
https://ideone.com/bAgtrg
eolymp 2459
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
secret

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