/in/foo.cc: In function 'int main()':
/in/foo.cc:7:10: warning: comparison of constant '10' with boolean expression is always true [-Wbool-compare]
    7 |   if(1<=T<=10);
      |      ~~~~^~~~
/in/foo.cc:7:7: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses]
    7 |   if(1<=T<=10);
      |      ~^~~
/in/foo.cc:7:3: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
    7 |   if(1<=T<=10);
      |   ^~
/in/foo.cc:8:6: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
    8 |      cout<<"R";
      |      ^~~~
/in/foo.cc:9:10: warning: comparison of constant '20' with boolean expression is always true [-Wbool-compare]
    9 |   if(10<T<=20);
      |      ~~~~^~~~
/in/foo.cc:9:8: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses]
    9 |   if(10<T<=20);
      |      ~~^~
/in/foo.cc:9:3: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
    9 |   if(10<T<=20);
      |   ^~
/in/foo.cc:10:6: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   10 |      cout<<"L";
      |      ^~~~
/in/foo.cc:11:3: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   11 |   if(T>10);
      |   ^~
/in/foo.cc:12:6: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   12 |      cout<<T;
      |      ^~~~