/in/foo.c: In function 'main':
/in/foo.c:14:10: warning: too many arguments for format [-Wformat-extra-args]
   printf("%d\n",x,res);
          ^~~~~~
/in/foo.c: In function 'Input':
/in/foo.c:21:6: warning: unused variable 'i' [-Wunused-variable]
  int i;
      ^