/in/foo.c:1:1: warning: data definition has no type or storage class
 d=int(input())
 ^
/in/foo.c:1:1: warning: type defaults to 'int' in declaration of 'd' [-Wimplicit-int]
/in/foo.c:1:3: error: expected expression before 'int'
 d=int(input())
   ^~~
/in/foo.c:24:2: error: invalid preprocessing directive #�
 #孪生素数
  ^