<https://eblogarithm.com/codeforces-round-387-div-2-problem-c-servers-solution-cc/#primaryimage>
<http://schema.org/url>
<https://i1.wp.com/eblogarithm.com/wp-content/uploads/2017/01/Codeforces-Round-387-Div-2-problem-C-Servers-Solution-in-CC1.png?fit=640%2C360&ssl=1>
<https://eblogarithm.com/codeforces-round-387-div-2-problem-c-servers-solution-cc/>