foo.c: In function 'main':
foo.c:8:2: warning: 'gets' is deprecated [-Wdeprecated-declarations]
  gets(a);
  ^~~~
In file included from foo.c:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
foo.c:11:4: warning: array subscript has type 'char' [-Wchar-subscripts]
   b[a[i]]++;
    ^
foo.c: In function 'isPrime':
foo.c:40:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
foo.c: In function 'main':
foo.c:9:24: warning: 'maxn' may be used uninitialized in this function [-Wmaybe-uninitialized]
  int b[130]={0},i,minn,maxn;
                        ^~~~
foo.c:22:5: warning: 'minn' may be used uninitialized in this function [-Wmaybe-uninitialized]
   if(b[j]<minn&&b[j]!=0)
     ^
/tmp/ccRi55pV.o: In function `main':
foo.c:(.text.startup+0x12): warning: the `gets' function is dangerous and should not be used.

自豪的采用jd5进行评测(github.com/masnn/jd5)

{"receive":"2020-02-23T06:25:22.891Z","handle":"2020-02-23T06:25:22.891Z","cache_start":"2020-02-23T06:25:22.892Z","read_cases":"2020-02-23T06:25:23.065Z","judge":"2020-02-23T06:25:23.065Z","done":"2020-02-23T06:25:23.551Z"}