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  1. #include <iostream>
  2. #include <algorithm>
  3. #include <cmath>
  4. #include <cstdlib>
  5. #include <cctype>
  6. #include <limits.h>
  7. #include <string>
  8. #include <cstring>
  9. #include <iomanip>
  10. #include <vector>
  11. #include <queue>
  12. #include <set>
  13. #define ll long long 
  14. #define dd double
  15. #define ld long double
  16. #define pi 3.14159265359
  17. #define ull unsigned long long 
  18. #define yes cout<<"YES\n"
  19. #define no cout<<"NO\n"
  20. #define el "\n"
  21. #define Arwa ios::sync_with_stdio(0);cin.tie(0);cout.tie(0); 
  22. #define fix(x) cout<<fixed<<setprecision(x)
  23. using namespace std;
  24. ll gcd(ll a,ll b) {return b==0?a:gcd(b,a%b);}
  25. ll lcm(int a,int b) {return a/gcd(a, b)*b;}
  26. int main()
  27. {
  28.        Arwa
  29.        int n,q;
  30.        cin>>n>>q;
  31.        string s;
  32.        cin>>s;
  33.        while(q--)
  34.        {
  35.             string t;
  36.             cin>>t;
  37.             if(t=="substr")
  38.             {
  39.                 int l,r;
  40.                 cin>>l>>r;
  41.                 // substr بتاخد البداية والطول يعنى هتاخد الفرق بين البداية والنهاية
  42.                 cout<<s.substr(l-1,r-l+1)<<el;
  43.             }
  44.             else if(t=="sort")
  45.             {
  46.                 int l,r;
  47.                 cin>>l>>r;
  48.                 sort(s.begin()+(l-1),s.begin()+(r));
  49.             }
  50.             else if(t=="pop_back")
  51.             s.pop_back();
  52.             else if(t=="back")
  53.             cout<<s.back()<<el;
  54.             else if(t=="reverse")
  55.             {
  56.                 int l,r;
  57.                 cin>>l>>r;
  58.                 reverse(s.begin()+(l-1),s.begin()+r);
  59.             }
  60.             else if(t=="front")
  61.             cout<<s.front()<<el;
  62.             else if(t=="push_back")
  63.             {
  64.                 char x;
  65.                 cin>>x;
  66.                 s.push_back(x);
  67.             }
  68.             else if(t=="print")
  69.             {
  70.               int l;
  71.               cin>>l;
  72.               cout<<s[l-1]<<el;
  73.             }  
  74.        }
  75.     return 0; 
  76. }
Success #stdin #stdout 0.01s 5272KB
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https://ideone.com/CkTW2G
language:
C++ (gcc 8.3)
created:
59 days ago
visibility:
public

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