/in/foo.c:1:1: warning: data definition has no type or storage class
    1 | re=int(input())
      | ^~
/in/foo.c:1:1: warning: type defaults to 'int' in declaration of 're' [-Wimplicit-int]
/in/foo.c:1:4: error: expected expression before 'int'
    1 | re=int(input())
      |    ^~~