lessons/课程/插图/02-强连通与双连通/00-圆方树-01-共享点双块.svg

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  <rect width="940" height="390" fill="#f8fafc"/><text x="42" y="38" class="t" font-weight="bold">原图：C 同时站在几个结实小团体的门口</text>
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  <g class="t" text-anchor="middle"><text x="120" y="126">A</text><text x="70" y="256">B</text><text x="250" y="226">C</text><text x="400" y="121">D</text><text x="445" y="276">E</text><text x="320" y="341">F</text><text x="445" y="341">G</text></g>
  <text x="145" y="300" class="s">删 C，三处会分开</text>
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  <text x="540" y="38" class="t" font-weight="bold">圆方树：复制“块”，不复制 C</text>
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  <g class="t" text-anchor="middle"><text x="570" y="136">A</text><text x="615" y="291">B</text><text x="680" y="196">C</text><text x="680" y="196" class="s" dy="43">Q1</text><text x="790" y="126">Q2</text><text x="800" y="266">Q3</text><text x="730" y="331">Q4</text><text x="860" y="331">G</text></g>
  <text x="543" y="370" class="s">圆点＝原顶点；方点＝点双块；此处只画出骨架中的部分成员</text>
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