/in/foo.c:2:6: warning: return type of 'main' is not 'int' [-Wmain]
 void main(){
      ^~~~
/in/foo.c: In function 'main':
/in/foo.c:12:10: warning: too many arguments for format [-Wformat-extra-args]
   printf("Yes\n", num);
          ^~~~~~~
/in/foo.c:14:10: warning: too many arguments for format [-Wformat-extra-args]
   printf("No\n", num);
          ^~~~~~