{"trustable":false,"sections":[{"title":"","value":{"format":"MD","content":"给定 N 个点的强连通图。\n\n求出恰好包含 2*N 条边的子图,子图也是强连通的。\n\n[详细题面见 pdf 的题 c](CDN_BASE_URL/1c7cacfa138ca7973ccb0651c42f7e5d?v\u003d1650988379)"}}]}