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  1. #include <iostream>
  2. #include <list>
  3. #define FOR(i,a,b) for(int i=a; i<b; i++)
  4. #define dbug(x) #x<<": "<<x<<' '
  5. using namespace std;
  6. int n,m,p;
  7. list<char> s;
  8. list<char>::iterator it;
  9. void del()
  10. {
  11. 	int os=0,cs=0;
  12. 	if(*it == '(')
  13. 	{
  14. 		do
  15. 		{
  16. 			if(*it=='(')
  17. 				os++;
  18. 			else
  19. 				cs++;
  20. 			s.erase(it);
  21. 			it++;
  22. 		} while(os>cs);
  23. 	}
  24. 	else
  25. 	{
  26. 		do
  27. 		{
  28. 			if(*it=='(')
  29. 				os++;
  30. 			else
  31. 				cs++;
  32. 			s.erase(it);
  33. 			it--;
  34. 		} while(cs>os);
  35. 		it++;
  36. 	}
  37. }
  38. int main()
  39. {
  40. 	cin>>n>>m>>p;
  41. 	FOR(i,0,n)
  42. 	{
  43. 		char tmp;
  44. 		cin>>tmp;
  45. 		s.push_back(tmp);
  46. 	}
  47. 	it=s.begin();
  48. 	while(--p)
  49. 		it++;
  50. 	while(m--)
  51. 	{
  52. 		char tmp;cin>>tmp;
  53. 		if(tmp == 'R')
  54. 			it++;
  55. 		else if(tmp == 'L')
  56. 			it--;
  57. 		else del();
  58. 	}
  59.  
  60. 	for (it=s.begin(); it!=s.end(); ++it)
  61. 	    std::cout << *it;
  62. }
Success #stdin #stdout 0s 3416KB
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https://ideone.com/ujuwmL
language:
C++14 (clang 8.0)
created:
8 years ago
visibility:
public

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