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  1. #include <bits/stdc++.h>
  2. #define ll long long
  3. #define YES cout << "YES\n";
  4. #define NO cout << "NO\n";
  5. #define opps cout<<-1<<endl;
  6. const ll con = 1e10 + 5;
  7. using namespace std;
  8. void solve() {
  9.     int n  , x = 0  ;
  10.     cin >> n ;
  11.     cin.ignore();
  12.     vector<string> a;
  13.     while (n--){
  14.         string s;
  15.         getline(cin, s);
  16.         if (s == "LEFT") {
  17.             x--;
  18.             a.push_back("LEFT");
  19.         }
  20.         else if (s == "RIGHT") {
  21.             x++;
  22.             a.push_back("RIGHT");
  23.         }
  24.         else {
  25.             string tr = s.substr(8);
  26.             int j = stoi(tr);
  27.             string we = a[j - 1];
  28.             (we == "LEFT") ? x-- : x++;
  29.             a.push_back(we);
  30.         }
  31.     }
  32.     cout << x << endl;
  33. }
  34. int main() {
  35.     ios::sync_with_stdio(0);
  36.     cin.tie(0);
  37.     int t = 1;
  38.     cin>>t;
  39.     while(t--)
  40.         solve();
  41. }
Success #stdin #stdout 0s 5308KB
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https://ideone.com/MXvrHV
language:
C++ (gcc 8.3)
created:
4 hours ago
visibility:
public

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