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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. using ll = long long;
  4. int main() {
  5.     ll q; cin >> q;
  6.     string s = "";
  7.     for (ll i = 1; i <= q; i++)
  8.     {
  9.  
  10.         ll n; cin >> n;
  11.         if (n == 1) 
  12.         {
  13.             char c; cin >> c;
  14.             s += c;
  15.             cout << c << endl;
  16.         }
  17.  
  18.         else
  19.         {
  20.             string x = "";
  21.             if (s.size() == 0) cout << '-' << endl;
  22.             else if (s.size() == 1)
  23.             {
  24.             	cout << '-' << endl;
  25.             	s = "";
  26.             }
  27.             else
  28.             {
  29.                 for (ll j = 0; j < s.size() - 1; j++)
  30.                 {
  31.                     x += s[j];
  32.  
  33.                 }
  34.                 s = x;
  35.                 cout << s[s.size() - 1] << endl;
  36.             }
  37.  
  38.         }
  39.     }
  40. }
  41.  
Success #stdin #stdout 0.01s 5320KB
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https://ideone.com/WBOwmx
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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