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  1. #include <iostream>
  2. #include <vector>
  3. #include <string>
  4. #include <locale>
  5. #include <sstream>
  6. using namespace std;
  7.  
  8. struct colon_is_space : std::ctype<char> {
  9.   colon_is_space() : std::ctype<char>(get_table()) {}
  10.   static mask const* get_table()
  11.   {
  12.     static mask rc[table_size];
  13.     rc[','] = std::ctype_base::space;
  14.     rc['['] = std::ctype_base::space;
  15.     rc[']'] = std::ctype_base::space;
  16.     return &rc[0];
  17.   }
  18. };
  19.  
  20. void printList(const vector<int>& numbers,const bool& reversed,const int& startList,const int& endList)
  21. {
  22.     cout << "[";
  23.     bool second = false;
  24.  
  25.     if(reversed)
  26.     {
  27.         for (int i=endList-1; i>=startList;--i)
  28.         {
  29.             if(second) cout << ",";
  30.             cout << numbers[i];
  31.             second = true;
  32.         }   
  33.     }
  34.     else
  35.     {
  36.         for (int i=startList; i<endList;++i)
  37.         {
  38.             if(second) cout << ",";
  39.             cout << numbers[i];
  40.             second = true;
  41.         }   
  42.     }
  43.     cout << "]" << "\n";
  44. }
  45.  
  46. void swapBool(bool& someBool)
  47. {
  48. 	someBool = !someBool;
  49. }
  50.  
  51. bool deleteElem(const bool& reversed,int& startList,int& endList)
  52. {
  53.     bool deleted;
  54.     if(reversed) --endList;
  55.     else ++startList;
  56.     (endList>=startList)? deleted=true : deleted=false;
  57.     return deleted;
  58. }
  59.  
  60. int main() 
  61. {
  62. 	using std::string;
  63.     using std::cin;
  64.     using std::locale;
  65.     ios::sync_with_stdio(false);
  66.     cin.tie(NULL);
  67.  
  68.     int testcases;
  69.     cin >> testcases;
  70.  
  71.     vector<int> numbers;
  72.     for (int i=0;i<testcases;++i)
  73.     {
  74.         string command;
  75.         int sizeOfList;
  76.         cin >> command >> sizeOfList;
  77.  		cout << "command "<< command << " sizeOfList "<< sizeOfList << endl;
  78.  		string line;
  79. 		cin>>line;
  80.         bool reversed    = false;
  81.         bool shouldPrint = true;
  82.         int startList=0;
  83.         int endList=sizeOfList;
  84.         for(int j=0;j<command.size();++j)
  85.         {
  86.             if(command.at(j) == 'R') swapBool(reversed);
  87.             else
  88.             {
  89.                 if (deleteElem(reversed,startList,endList) == false)
  90.                 {
  91.                     cout << "error\n";
  92.                     shouldPrint = false;
  93.                     break;
  94.                 }
  95.             }
  96.         }
  97.         if (shouldPrint) 
  98.         {
  99.         	stringstream ss(line);
  100.         	ss.imbue(locale(ss.getloc(), new colon_is_space));
  101.         	int singleNumber;
  102.         	for(int j=0;j<sizeOfList;++j)
  103. 	        {
  104. 	            ss >> singleNumber;
  105. 	            numbers[j]=singleNumber;
  106. 	        }
  107.         	printList(numbers,reversed,startList,endList);
  108.         }
  109.         numbers.clear();
  110.     }
  111.     return 0;
  112. }
Runtime error #stdin #stdout 0s 15248KB
comments (?)
stdin
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4
RDD
4
[1,2,3,4]
DD
1
[42]
RRD
6
[1,1,2,3,5,8]
D
0
[]
stdout
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command RDD sizeOfList 4
https://ideone.com/Tb523b
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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