foo.cc: In function 'int main()':
foo.cc:176:12: warning: 'char* gets(char*)' is deprecated [-Wdeprecated-declarations]
   gets(word);//只有加这一句，才能正确读证词 
            ^
In file included from /usr/include/c++/7/cstdio:42:0,
                 from /usr/include/c++/7/ext/string_conversions.h:43,
                 from /usr/include/c++/7/bits/basic_string.h:6361,
                 from /usr/include/c++/7/string:52,
                 from /usr/include/c++/7/bits/locale_classes.h:40,
                 from /usr/include/c++/7/bits/ios_base.h:41,
                 from /usr/include/c++/7/ios:42,
                 from /usr/include/c++/7/ostream:38,
                 from /usr/include/c++/7/iostream:39,
                 from foo.cc:2:
/usr/include/stdio.h:638:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
foo.cc:179:26: warning: 'char* gets(char*)' is deprecated [-Wdeprecated-declarations]
     string temp=gets(word);
                          ^
In file included from /usr/include/c++/7/cstdio:42:0,
                 from /usr/include/c++/7/ext/string_conversions.h:43,
                 from /usr/include/c++/7/bits/basic_string.h:6361,
                 from /usr/include/c++/7/string:52,
                 from /usr/include/c++/7/bits/locale_classes.h:40,
                 from /usr/include/c++/7/bits/ios_base.h:41,
                 from /usr/include/c++/7/ios:42,
                 from /usr/include/c++/7/ostream:38,
                 from /usr/include/c++/7/iostream:39,
                 from foo.cc:2:
/usr/include/stdio.h:638:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
foo.cc:176:7: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result [-Wunused-result]
   gets(word);//只有加这一句，才能正确读证词 
   ~~~~^~~~~~
foo.cc:170:11: warning: 'index' may be used uninitialized in this function [-Wmaybe-uninitialized]
   int i,j,index,BadManNum=0;
           ^~~~~
/tmp/cc54xL1P.o: In function `main':
foo.cc:(.text.startup+0xc0): warning: the `gets' function is dangerous and should not be used.

自豪的采用 HydroJudge 进行评测(github.com/hydro-dev/HydroJudge)

{"receive":"2020-08-13T05:50:50.924Z","handle":"2020-08-13T05:50:50.924Z","cache_start":"2020-08-13T05:50:50.933Z","read_cases":"2020-08-13T05:50:51.074Z","judge":"2020-08-13T05:50:51.077Z","done":"2020-08-13T05:50:51.842Z"}