/in/foo.c: In function 'main':
/in/foo.c:9:2: warning: 'gets' is deprecated [-Wdeprecated-declarations]
  gets(s);
  ^~~~
In file included from /in/foo.c:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
/in/foo.c:10:10: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'char *' [-Wformat=]
  scanf("%d%d",&si,&len);
          ^
/in/foo.c:10:12: warning: format '%d' expects argument of type 'int *', but argument 3 has type 'char *' [-Wformat=]
  scanf("%d%d",&si,&len);
            ^
/in/foo.c: In function 'Delete':
/in/foo.c:23:2: warning: this 'else' clause does not guard... [-Wmisleading-indentation]
  else
  ^~~~
/in/foo.c:26:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'else'
   for(i=si+len;i<n;i++)
   ^~~
/tmp/ccxbEIfA.o: In function `main':
foo.c:(.text.startup+0x11): warning: the `gets' function is dangerous and should not be used.