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@@ -324,8 +324,7 @@ BFS 通常借助队列来实现,代码如下所示。队列具有“先入先
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let mut que = VecDeque::new();
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que.push_back(start_vet);
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// 以顶点 vet 为起点,循环直至访问完所有顶点
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while !que.is_empty() {
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let vet = que.pop_front().unwrap(); // 队首顶点出队
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while let Some(vet) = que.pop_front() {
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res.push(vet); // 记录访问顶点
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// 遍历该顶点的所有邻接顶点
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