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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. int main()
  6. {
  7. 	deque <int> d;
  8.  
  9. 	int n, q;
  10.  
  11. 	scanf("%d", &q);
  12.  
  13. 	bool reversed = false;
  14.  
  15. 	while (q--)
  16. 	{
  17. 		string s;  cin >> s;
  18.  
  19. 		if (s == "push_back")
  20. 		{
  21. 			scanf("%d", &n);
  22.  
  23. 			reversed ? d.push_front(n) : d.push_back(n);
  24. 		}
  25. 		else if (s == "toFront")
  26. 		{
  27. 			scanf("%d", &n);
  28.  
  29. 			reversed ? d.push_back(n) : d.push_front(n);
  30. 		}
  31. 		else if (s == "back")
  32. 		{
  33. 			if(d.empty())
  34. 				printf("%s\n", "No job for Ada?");
  35. 			else	
  36. 				if(reversed)
  37. 				{
  38. 					printf("%d\n", d.front());
  39. 					d.pop_front();
  40. 				}
  41. 				else
  42. 				{
  43. 					printf("%d\n", d.back());
  44. 					d.pop_back();
  45. 				}
  46. 		}
  47. 		else if (s == "front")
  48. 		{
  49. 			if(d.empty())
  50. 				printf("%s\n", "No job for Ada?");
  51. 			else
  52. 				if(reversed)
  53. 				{
  54. 					printf("%d\n", d.back());
  55. 					d.pop_back();
  56. 				}
  57. 				else
  58. 				{
  59. 					printf("%d\n", d.front());
  60. 					d.pop_front();
  61. 				}
  62. 		}
  63.     	else if (s == "reverse")
  64.     			reversed == !reversed;
  65. 	}
  66.  
  67. 	return 0;
  68. }
Success #stdin #stdout 0s 4200KB
comments (?)
stdin
copy 
15
toFront 93
front
back
reverse
back
reverse
toFront 80
push_back 53
push_back 50
front
front
reverse
push_back 66
reverse
front
stdout
copy 
93
No job for Ada?
No job for Ada?
80
53
50
https://ideone.com/tsoQra
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
public

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