free(leftArr); // 释放临时数组
伊朗迎戰之策分析：以耐力與嚇阻為核心的高風險戰略
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We can avoid this in two ways. Firstly, we can declare that any code that observes two nodes must depend on those nodes, and then apply the topological sort we described earlier. Alternatively, we can declare that any code that might be able to observe two nodes can only be run after all nodes have finished running2. These both work, but again they require us to be able to observe the full dependency tree and topologically sort all nodes.，更多细节参见新收录的资料