foo.c:1:1: error: unknown type name 'import'
    1 | import math
      | ^~~~~~
foo.c:2:1: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'a'
    2 | a=int(input())
      | ^
foo.c:7:7: warning: multi-character character constant [-Wmultichar]
    7 | print('%.2f'%s)
      |       ^~~~~~

[Hydro](https://hydro.ac)提供评测服务