foo.c: In function 'main':
foo.c:7:10: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[20000]' [-Wformat=]
  scanf("%s",&a);
          ^

自豪的采用jd5进行评测(github.com/masnn/jd5)

{"receive":"2020-02-23T06:47:02.048Z","handle":"2020-02-23T06:47:02.048Z","done":"2020-02-23T06:47:02.474Z"}