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  1. #include <iostream>
  2. #include <string>
  3. #include <cmath>
  4. #include <algorithm>
  5. #include <set>
  6. using namespace std;
  7.  
  8. int main()
  9. {
  10.     string s;
  11.     int N, Q;
  12.     cin >> N >> Q;
  13.     cin >> s;
  14.     string p;
  15.     for (int i = 0; i < Q; i++) {
  16.         cin >> p;
  17.         if (p == "substr") {
  18.             int start, end;
  19.             cin >> start >> end;
  20.             cout << s.substr(start-1, end-start+1) << endl;
  21.         }
  22.         else if (p == "sort") {
  23.             int start, end;
  24.             cin >> start >> end;
  25.             // Make sure start <= end
  26.             if (start <= end) {
  27.                 sort(s.begin() + start - 1, s.begin() + end);
  28.             }
  29.         }
  30.         else if (p == "pop_back") {
  31.             s.pop_back();
  32.         }
  33.         else if (p == "back") {
  34.             cout << s.back() << endl;
  35.         }
  36.         else if (p == "front") {
  37.             cout << s.front() << endl;
  38.         }
  39.         else if (p == "push_back") {
  40.             char d;
  41.             cin >> d;
  42.             s.push_back(d);
  43.         }
  44.         else if (p == "reverse") {
  45.             int start, end;
  46.             cin >> start >> end;
  47.             if (start <= end) {
  48.                 reverse(s.begin() + start - 1, s.begin() + end);
  49.             }
  50.         }
  51.         else if (p == "print") {
  52.             int bero;
  53.             cin >> bero;
  54.             cout << s[bero - 1] << endl;
  55.         }
  56.     }
  57. }
Success #stdin #stdout 0.01s 5288KB
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https://ideone.com/3qQeyM
language:
C++ (gcc 8.3)
created:
7 days ago
visibility:
public

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