Kanon

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<ul data-line="2" class="code-line">
<li data-line="2" class="code-line">左に赤い石を集めれば良い</li>
<li data-line="3" class="code-line">最終的に赤い石が左に全部集まった時、もともと左にあった白い石を押し出すことになる</li>
<li data-line="4" class="code-line">この白い石の数が操作の回数になる</li>
</ul>
