/in/foo.c:1:2: error: invalid preprocessing directive #!
 #!/usr/bin/env python3
  ^
/in/foo.c:2:3: error: invalid preprocessing directive #-
 # -*- coding : utf-8 -*-
   ^
/in/foo.c:3:1: warning: data definition has no type or storage class
 a=input()
 ^
/in/foo.c:3:1: warning: type defaults to 'int' in declaration of 'a' [-Wimplicit-int]
/in/foo.c:3:3: warning: implicit declaration of function 'input' [-Wimplicit-function-declaration]
 a=input()
   ^~~~~
/in/foo.c:3:3: error: initializer element is not constant
/in/foo.c:4:1: error: expected ',' or ';' before 'b'
 b=input()
 ^