3.1

文档摘要

3.1 LeetCode“”“”——“”“”“” LeetCode LeetCode, , , , , , , , , , LeetCode, , , , —— LeetCode“” “”“”“”“”“” 3.1 “” GraphVertex NodeEdge 3.1.1 “” Undirected Graph “” Directed Graph “” Weighted Graph“”“”“” “”AB“”“” Simple Graph Connected Graph Strongly Connected GraphABBA Sparse GraphDense Graph 3.1.