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  1. #include <bits/stdc++.h>
  2. #define nl "\n"
  3.  
  4. using namespace std;
  5.  
  6. int main(){
  7.   #ifndef ONLINE_JUDGE
  8.   freopen("input.txt","r",stdin);
  9.   freopen("output.txt","w",stdout);
  10.   #endif
  11.   ios_base::sync_with_stdio(0);
  12.   cin.tie(0);
  13.   cout.tie(0);
  14.  
  15.  
  16.   int len,ope;
  17.   cin >> len >> ope;
  18.   string X;
  19.   cin >> X;
  20.   for(int i=0 ; i<=ope ; i++){
  21.     string que;
  22.     cin >> que;
  23.  
  24.     if(que == "substr"){
  25.       int pos1,pos2;
  26.       cin >> pos1 >> pos2;
  27.       cout << X.substr(pos1-1,pos2)<<nl;
  28.     } else if(que == "sort"){
  29.  
  30.       int pos1,pos2;
  31.       cin >> pos1 >> pos2;
  32.       sort(X.begin()+pos1-1,X.begin()+pos2);
  33.     } else if(que == "pop_back"){
  34.       X.pop_back();
  35.     } else if(que == "back"){
  36.       cout << X.back()<<nl;
  37.     } else if(que == "reverse"){
  38.       int pos1,pos2;
  39.       cin >> pos1 >> pos2;
  40.       pos1 -=1;
  41.       reverse(X.begin()+pos1,X.begin()+pos2);
  42.     } else if(que == "front"){
  43.       cout << X.front()<<nl;
  44.     } else if(que == "push_back"){
  45.       char ch;
  46.       cin >> ch;
  47.       X.push_back(ch);
  48.     } else if(que == "print"){
  49.       int pos;
  50.       cin >> pos;
  51.       cout << X[pos-1] <<nl;
  52.     }
  53.  
  54.   }
  55.  
  56.  
  57.   return 0 ;
  58. } 
  59.  
Success #stdin #stdout 0.01s 5284KB
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Standard input is empty
stdout
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Standard output is empty
https://ideone.com/G3wPW3
language:
C++ (gcc 8.3)
created:
21 hours ago
visibility:
public

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