/in/foo.cc: In function 'int main()':
/in/foo.cc:92:2: warning: 'char* gets(char*)' is deprecated [-Wdeprecated-declarations]
  gets(s);
  ^~~~
In file included from /in/foo.cc:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
/in/foo.cc:92:8: warning: 'char* gets(char*)' is deprecated [-Wdeprecated-declarations]
  gets(s);
        ^
In file included from /in/foo.cc:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
/in/foo.cc:95:3: warning: 'char* gets(char*)' is deprecated [-Wdeprecated-declarations]
   gets(s);
   ^~~~
In file included from /in/foo.cc:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
/in/foo.cc:95:9: warning: 'char* gets(char*)' is deprecated [-Wdeprecated-declarations]
   gets(s);
         ^
In file included from /in/foo.cc:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
/tmp/cczO0T3i.o: In function `main':
foo.cc:(.text.startup+0x27): warning: the `gets' function is dangerous and should not be used.

FileNotFoundError('input/expr0.in',)