Language: C++

#include<bits/stdc++.h>
int main()
{
string s;
cin>>s;
int ans=0,cnt=0,flag=0;;
if(s[0]=='R')cnt+=1,flag=1;
for(int i=1;i<s.size();i++){
if(s[i]=='R' and flag==1){cnt++;}
else if(s[i]=='R' and flag==0){cnt++,flag=1;}
else if(s[i]=='S' and flag==1){ans=max(ans,cnt);flag=0;}
}
ans=max(ans,cnt);
cout<<ans<<endl;
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:4:1: error: 'string' was not declared in this scope
    4 | string s;
      | ^~~~~~
a.cc:4:1: note: suggested alternatives:
In file included from /usr/include/c++/14/string:41,
                 from /usr/include/c++/14/bitset:52,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:52,
                 from a.cc:1:
/usr/include/c++/14/bits/stringfwd.h:77:33: note:   'std::string'
   77 |   typedef basic_string<char>    string;
      |                                 ^~~~~~
/usr/include/c++/14/string:76:11: note:   'std::pmr::string'
   76 |     using string    = basic_string<char>;
      |           ^~~~~~
a.cc:5:1: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    5 | cin>>s;
      | ^~~
      | std::cin
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:146:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:5:6: error: 's' was not declared in this scope
    5 | cin>>s;
      |      ^
a.cc:11:36: error: 'max' was not declared in this scope; did you mean 'std::max'?
   11 | else if(s[i]=='S' and flag==1){ans=max(ans,cnt);flag=0;}
      |                                    ^~~
      |                                    std::max
In file included from /usr/include/c++/14/algorithm:61,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51:
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: 'std::max' declared here
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
a.cc:13:5: error: 'max' was not declared in this scope; did you mean 'std::max'?
   13 | ans=max(ans,cnt);
      |     ^~~
      |     std::max
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: 'std::max' declared here
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
a.cc:14:1: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   14 | cout<<ans<<endl;
      | ^~~~
      | std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:14:12: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   14 | cout<<ans<<endl;
      |            ^~~~
      |            std::endl
In file included from /usr/include/c++/14/istream:41,
                 from /usr/include/c++/14/sstream:40,
                 from /usr/include/c++/14/complex:45,
                 from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~