lessons/课程/插图/02-强连通与双连通/03-圆方树-02-路径经过割点.svg

<svg xmlns="http://www.w3.org/2000/svg" width="900" height="280" viewBox="0 0 900 280">
  <style>.t{font:16px sans-serif;fill:#1f2937}.s{font:13px sans-serif;fill:#475569}.n{fill:white;stroke:#2563eb;stroke-width:3}.cut{fill:#ffedd5;stroke:#ea580c;stroke-width:4}.q{fill:#dcfce7;stroke:#16a34a;stroke-width:3}.e{stroke:#94a3b8;stroke-width:4}.p{stroke:#dc2626;stroke-width:7}</style>
  <rect width="900" height="280" fill="#f8fafc"/><text x="32" y="32" class="t" font-weight="bold">原图里难以看清的“必经割点”，在圆方树中变成唯一树路径</text>
  <g class="e"><line x1="90" y1="140" x2="190" y2="140"/><line x1="190" y1="140" x2="300" y2="140"/><line x1="300" y1="140" x2="410" y2="140"/><line x1="410" y1="140" x2="520" y2="140"/><line x1="520" y1="140" x2="630" y2="140"/><line x1="630" y1="140" x2="740" y2="140"/></g>
  <g class="p"><line x1="90" y1="140" x2="740" y2="140"/></g>
  <g class="n"><circle cx="90" cy="140" r="23"/><circle cx="740" cy="140" r="23"/></g><g class="q"><rect x="167" y="117" width="46" height="46" rx="7"/><rect x="387" y="117" width="46" height="46" rx="7"/><rect x="607" y="117" width="46" height="46" rx="7"/></g><circle cx="300" cy="140" r="25" class="cut"/><circle cx="520" cy="140" r="25" class="cut"/>
  <g class="t" text-anchor="middle"><text x="90" y="146">u</text><text x="190" y="146">Q1</text><text x="300" y="146">C</text><text x="410" y="146">Q2</text><text x="520" y="146">F</text><text x="630" y="146">Q3</text><text x="740" y="146">v</text></g>
  <text x="205" y="220" class="s">若问题问 u 到 v 必经哪些原图顶点，沿唯一树路径统计橙色圆点即可。</text>
</svg>