/in/foo.c:1:1: warning: data definition has no type or storage class
 a=[[0 for i in range(310)] for j in range(310)]
 ^
/in/foo.c:1:1: warning: type defaults to 'int' in declaration of 'a' [-Wimplicit-int]
/in/foo.c:1:3: error: expected expression before '[' token
 a=[[0 for i in range(310)] for j in range(310)]
   ^
/in/foo.c:1:28: error: expected ']' before 'for'
 a=[[0 for i in range(310)] for j in range(310)]
                            ^~~
/in/foo.c:2:1: error: expected ',' or ';' before 'f'
 f=[[0 for i in range(310)] for j in range(310)]
 ^