/in/foo.cc: In function 'int main()':
/in/foo.cc:17:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<s.size();i++)
              ~^~~~~~~~~
/in/foo.cc:30:38: warning: too many arguments for format [-Wformat-extra-args]
     printf("No Answer\n0\n",maxn-minn); 
                                      ^