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  1.  
  2. #include <iostream>
  3. #include <string>
  4. #include <algorithm>
  5.  
  6. using namespace std;
  7.  
  8. int main()
  9. {
  10.     int N, Q;
  11.     string S;
  12.     cin >> N >> Q >> S;
  13.     for (int i = 0;i < Q;i++) {
  14.         string s;
  15.         cin >> s;
  16.         if (s == "pop_back") {
  17.             S.pop_back();
  18.             N--;
  19.         }
  20.         else if (s == "front") {
  21.             cout << S.front() << endl;
  22.         }
  23.         else if (s == "back") {
  24.             cout << S.back() << endl;
  25.         }
  26.         else if (s == "sort") {
  27.             int l, r;
  28.             cin >> l >> r;
  29.             sort(S.begin()+(l-1), S.begin() + r);
  30.         }
  31.         else if (s == "reverse") {
  32.             int l, r;
  33.             cin >> l >> r;
  34.             reverse(S.begin() + (l - 1), S.begin() + r);
  35.         }
  36.         else if (s == "print") {
  37.             int p;
  38.             cin >> p;
  39.             cout << S[p - 1] << endl;
  40.         }
  41.         else if (s == "substr") {
  42.             int l, r;
  43.             cin >> l >> r;
  44.             cout << S.substr((l - 1), r - l + 1) << endl;
  45.         }
  46.         else if (s == "push_back") {
  47.             char X;
  48.             cin >> X;
  49.             S.push_back(X);
  50.             N++;
  51.         }
  52.     }
  53. }
Success #stdin #stdout 0.01s 5304KB
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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/phQvlj
language:
C++ (gcc 8.3)
created:
11 hours ago
visibility:
public

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