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1020. Tree Traversals (25)时间限制400 ms内存限制32000 kB代码长度限制16000 B判题程序Standard作者CHEN, YueSuppose that all the keys in a binary tree are distinct positive integers. Given the postorder and inorder traversal sequences, you are supposed to output the level order traversal sequence of the corresponding binar 阅读全文
摘要：
1013. Battle Over Cities (25)时间限制400 ms内存限制32000 kB代码长度限制16000 B判题程序Standard作者CHEN, YueIt is vitally important to have all the cities connected by highways in a war. If a city is occupied by the enemy, all the highways from/toward that city are closed. We must know immediately if we need to repair a 阅读全文