PAT class a 1119 pre - and post order Traversals
PAT class a 1119 pre - and post order Traversals
Suppose that all the keys in a binary tree are distinct positive integers. A unique binary tree can be determined by a given pair of postorder and inorder traversal sequences, or preorder and inorder traversal sequences. However, if only the postorder and preorder traversal sequences are given, ...
Posted by highjo on Sat, 04 Dec 2021 16:05:14 -0800
python: when for accesses the sequence, it modifies the sequence again and again. What's the problem
An instance
Take a basic topic: PAT (Basic Level) Practice 1005: continue 3n+1 to show this problem. For a detailed description of the topic, see the PAT website.
Problem solving ideas
1. After writing the input data, convert the sequence to be verified into the list num of digital elements_ list.
2. Traverse num from scratch_ List, for ea ...
Posted by joelhop on Fri, 01 Oct 2021 15:34:29 -0700