foo.c: In function ‘main’:
foo.c:6:13: error: expected expression before ‘int’
    6 |         n = int(raw_input());
      |             ^~~
foo.c:7:9: error: ‘print’ undeclared (first use in this function); did you mean ‘printf’?
    7 |         print int(bin(n).replace('1','0',1), 2)<<1|1;
      |         ^~~~~
      |         printf
foo.c:7:9: note: each undeclared identifier is reported only once for each function it appears in
foo.c:7:14: error: expected ‘;’ before ‘int’
    7 |         print int(bin(n).replace('1','0',1), 2)<<1|1;
      |              ^~~~
      |              ;
foo.c:5:23: warning: variable ‘n’ set but not used [-Wunused-but-set-variable]
    5 |         long long int n;
      |                       ^