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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main()
  5. {
  6.     ios_base::sync_with_stdio(false); cin.tie(nullptr);
  7.     int n , q; cin >> n >> q;
  8.     string s ; cin >> s;
  9.  
  10.     for (int i = 0; i < q; i++)
  11.     {
  12.         string query ; cin >> query;
  13.         if(query == "pop_back")
  14.         {
  15.             s.pop_back();
  16.         }
  17.         else if (query == "front")
  18.         {
  19.             cout << s.front() << '\n';
  20.         }
  21.         else if (query == "back")
  22.         {
  23.             cout << s.back() << '\n';
  24.         }
  25.         else if (query == "sort")
  26.         {
  27.             int l , r; cin >> l >> r;
  28.             if(l > r) swap(l,r);
  29.  
  30.             sort(s.begin()+l-1,s.begin()+r);
  31.         }
  32.         else if (query == "reverse")
  33.         {
  34.             int l , r; cin >> l >> r;
  35.             if(l > r) swap(l,r);
  36.  
  37.             reverse(s.begin()+l-1,s.begin()+r); 
  38.         }
  39.         else if (query == "print")
  40.         {
  41.             int pos; cin >> pos;
  42.             cout << s[pos-1] << '\n';
  43.         }
  44.         else if (query == "substr")
  45.         {
  46.             int l , r; cin >> l >> r;
  47.             if(l > r) swap(l,r);
  48.  
  49.             cout << s.substr(l-1 , r-l+1) << '\n';
  50.         }
  51.         else
  52.         {
  53.             char x; cin >> x;
  54.             s.push_back(x);
  55.         }
  56.  
  57.  
  58.  
  59.  
  60.  
  61.  
  62.     }
  63.  
  64. }
Success #stdin #stdout 0s 5320KB
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https://ideone.com/cpOtKV
language:
C++ (gcc 8.3)
created:
3 hours ago
visibility:
public

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