/in/foo.c: In function 'main':
/in/foo.c:5:1: error: 'n' undeclared (first use in this function)
    5 | n = int(raw_input());
      | ^
/in/foo.c:5:1: note: each undeclared identifier is reported only once for each function it appears in
/in/foo.c:5:5: error: expected expression before 'int'
    5 | n = int(raw_input());
      |     ^~~
/in/foo.c:6:1: error: 'print' undeclared (first use in this function); did you mean 'printf'?
    6 | print int(bin(n).replace('1','0',1), 2)<<1|1;
      | ^~~~~
      | printf
/in/foo.c:6:6: error: expected ';' before 'int'
    6 | print int(bin(n).replace('1','0',1), 2)<<1|1;
      |      ^~~~
      |      ;