<https://eblogarithm.com/codeforces-round-387-div-2-problem-c-servers-solution-cc/#primaryimage>
<http://schema.org/width>
"640"^^<http://www.w3.org/2001/XMLSchema#integer>
<https://eblogarithm.com/codeforces-round-387-div-2-problem-c-servers-solution-cc/>