foo.cc: In function 'int main()':
foo.cc:10:13: warning: 'char* gets(char*)' is deprecated [-Wdeprecated-declarations]
   10 |   gets(sb[i]);
      |             ^
In file included from /usr/include/stdio.h:867,
                 from /usr/include/c++/9/cstdio:42,
                 from foo.cc:1:
/usr/include/x86_64-linux-gnu/bits/stdio2.h:235:1: note: declared here
  235 | gets (char *__str)
      | ^~~~
foo.cc:10:13: warning: 'char* gets(char*)' is deprecated [-Wdeprecated-declarations]
   10 |   gets(sb[i]);
      |             ^
In file included from /usr/include/stdio.h:867,
                 from /usr/include/c++/9/cstdio:42,
                 from foo.cc:1:
/usr/include/x86_64-linux-gnu/bits/stdio2.h:235:1: note: declared here
  235 | gets (char *__str)
      | ^~~~
foo.cc:7:15: warning: ignoring return value of 'int system(const char*)', declared with attribute warn_unused_result [-Wunused-result]
    7 |         system("ping www.luogu.com.cn > nul");
      |         ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
foo.cc:8:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    8 |  scanf("%d%d%d\n",&n,&m,&s);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~
foo.cc:10:7: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result [-Wunused-result]
   10 |   gets(sb[i]);
      |   ~~~~^~~~~~~
foo.cc:16:33: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   16 |  for(int i = 1;i <= m;i++) scanf("%s",list[i]);
      |                            ~~~~~^~~~~~~~~~~~~~
In file included from /usr/include/stdio.h:867,
                 from /usr/include/c++/9/cstdio:42,
                 from foo.cc:1:
In function 'char* gets(char*)',
    inlined from 'int main()' at foo.cc:10:7:
/usr/include/x86_64-linux-gnu/bits/stdio2.h:239:22: warning: call to '__gets_warn' declared with attribute warning: please use fgets or getline instead, gets can't specify buffer size [-Wattribute-warning]
  239 |   return __gets_warn (__str);
      |          ~~~~~~~~~~~~^~~~~~~
/usr/bin/ld: /tmp/ccItn9pV.o: in function `main':
foo.cc:(.text.startup+0x65): warning: the `gets' function is dangerous and should not be used.

[Hydro](https://hydro.ac)提供评测服务