/in/foo.cc: In function 'int main()':
/in/foo.cc:5:113: error: invalid operands of types 'const char [2]' and '<unresolved overloaded function type>' to binary 'operator<<'
    5 |     std::cin>>t;for(int i=1;i<=t;i++){std::cin>>p[i];std::cout<<(p[i]>20)?std::to_string(p[i]):(p[i]>10)?"L":"R"<<std::endl;}
      |                                                                                                              ~~~^~~~~~~~~~~