/in/foo.cc: In function 'int main()':
/in/foo.cc:7:23: error: 'R' was not declared in this scope
    7 |                 cout<<R;
      |                       ^
/in/foo.cc:8:16: warning: comparison of constant '20' with boolean expression is always true [-Wbool-compare]
    8 |         if(10<P<=20)
      |            ~~~~^~~~
/in/foo.cc:8:14: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses]
    8 |         if(10<P<=20)
      |            ~~^~
/in/foo.cc:9:23: error: 'L' was not declared in this scope
    9 |                 cout<<L;
      |                       ^