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  1. /* وَقُلْ رَبِّ زِدْنِي عِلْمًاً */
  2. #include <iostream>
  3. #include <algorithm>
  4. #include <cmath>
  5. #include <string>
  6. #include <iomanip>
  7. #include <stack>
  8. #include <set>
  9. #include <queue>
  10. #include <deque>
  11. #include <vector>
  12. #include <fstream>
  13. #include <cctype>
  14. #include <utility>
  15.  
  16. #define ll long long
  17. #define ld long double
  18. #define sz(v)   ((int)(v).size())
  19. #define all(v)    ((v).begin()),((v).end())
  20. #define setp(n) cout << fixed << setprecision(n)
  21. #define O_o ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
  22. #define yes cout << "YES\n"
  23. #define no cout << "NO\n"
  24. #define fi(nn) for(ll i = 0; i < (nn); i++)
  25. #define fj(nn) for(ll j = 0; j < (nn); j++)
  26. #define fl(nn) for (ll i = nn - 1; i >= 0; i--)
  27. #define ffi(nn,mm) for(ll i = 0; i < (nn); i++)for(ll j = 0; j < (mm); j++)
  28. #define wt ll t;cin>>t;while(t--)
  29. #define null NULL
  30.  
  31. using namespace std;
  32. int main()
  33. {
  34.     O_o
  35.         ll n, q;
  36.     string s;
  37.     cin >> n >> q >> s;
  38.     while (q--) {
  39.         string w;
  40.         cin >> w;
  41.         if (w == "pop_back") {
  42.             s.pop_back();
  43.         }
  44.         else if (w == "front") {
  45.             cout << s.front();
  46.             cout << '\n';
  47.         }
  48.         else if (w == "back") {
  49.             cout << s.back();
  50.             cout << '\n';
  51.         }
  52.         else if (w == "sort") {
  53.             ll x, y;
  54.             cin >> x >> y;
  55.             sort(s.begin() + min(x, y) - 1, s.begin() + max(x, y));
  56.         }
  57.         else if (w == "reverse") {
  58.             ll x, y;
  59.             cin >> x >> y;
  60.             reverse(s.begin() + min(x, y) - 1, s.begin() + max(x, y));
  61.         }
  62.         else if (w == "print") {
  63.             ll x, y;
  64.             cin >> x;
  65.             cout << s[x - 1];
  66.             cout << '\n';
  67.         }
  68.         else if (w == "substr") {
  69.             ll x, y;
  70.             cin >> x >> y;
  71.             cout << s.substr(x - 1, y - x + 1);
  72.             cout << '\n';
  73.         }
  74.         else if (w == "push_back") {
  75.             char x;
  76.             cin >> x;
  77.             s.push_back(x);
  78.         }
  79.  
  80.     }
  81.     return 0;
  82. }
Success #stdin #stdout 0.01s 5288KB
comments (?)
stdin
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18 8
assiutinupperegypt
substr 1 6
sort 5 8
pop_back
back
reverse 1 6
front
push_back i
print 4
stdout
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assiut
p
n
s
https://ideone.com/kXWbkd
language:
C++ (gcc 8.3)
created:
17 hours ago
visibility:
public

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