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  1. #include <bits/stdc++.h>
  2. #define ull unsigned long long
  3. #define ll long long
  4. #define el endl
  5. #define nl '\n'
  6. using namespace std;
  7. void input()
  8. {
  9.     if (fopen("in.txt", "r"))
  10.     {
  11.         freopen("in.txt", "r", stdin);
  12.         freopen("out.txt", "w", stdout);
  13.     }
  14. }
  15.  
  16. int a, b, c;
  17.  
  18. int trip(int a, int b, int c)
  19. {
  20.     return a * b * c;
  21. }
  22. int main()
  23. {
  24. Fast:
  25.     input();
  26.     //---------------------------------" " UPSOLVE---------------------------------------------------------------
  27.  
  28.     int n, q;
  29.     cin >> n >> q;
  30.     string s;
  31.     cin >> s;
  32.  
  33.     while (q--)
  34.     {
  35.         string t;
  36.         cin >> t;
  37.  
  38.         if (t == "pop_back")
  39.             s.pop_back();
  40.  
  41.         else if (t == "front")
  42.             cout << s.front() << el;
  43.  
  44.         else if (t == "back")
  45.             cout << s.back() << el;
  46.  
  47.         else if (t == "sort")
  48.         {
  49.             int l, r;
  50.             cin >> l >> r;
  51.             l--;
  52.             r--;
  53.             sort(s.begin() + l, s.begin() + r + 1);
  54.         }
  55.         else if (t == "reverse")
  56.         {
  57.             int l, r;
  58.             cin >> l >> r;
  59.             l--;
  60.             r--;
  61.             reverse(s.begin() + l, s.begin() + r + 1);
  62.         }
  63.         else if (t == "print")
  64.         {
  65.             int pos;
  66.             cin >> pos;
  67.             pos--;
  68.             cout << s[pos] << el;
  69.         }
  70.         else if (t == "substr")
  71.         {
  72.             int l, r;
  73.             cin >> l >> r;
  74.             l--;
  75.             r--;
  76.             cout << s.substr(l, r - l + 1) << el;
  77.         }
  78.         else if (t == "push_back")
  79.         {
  80.             char x;
  81.             cin >> x;
  82.             s.push_back(x);
  83.         }
  84.     }
  85.  
  86.     return 0;
  87. }
  88.  
Success #stdin #stdout 0.01s 5288KB
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Standard input is empty
stdout
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Standard output is empty
https://ideone.com/rSvtDh
language:
C++ (gcc 8.3)
created:
2 days ago
visibility:
public

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