title: What does this definition of contiguous subsequences mean?
body: <p>I don't understand the following definition of a contiguous subsequence:</p>
  <blockquote>
  <p>A contiguous subsequence of a list S is a subsequence made up of consecutive elements of S.</p>
  <p>If S is <code>{5, 15, -30, 10, -5, 40, 10}</code><br />
  then <code>15, -30, 10</code> is a contiguous subsequence.</p>
  </blockquote>
  <p>What makes <code>15, -30, 10</code> a contiguous subsequence?</p>