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全部文章（共39篇）

PAT(树)——1020 Tree Traversals （25 分）

1020 Tree Traversals （25 分） Suppose that all the keys in a binary tree are distinct positive integers. Given the postorder and inorder traversal sequ...

PAT

2019-01-20

0 466

PAT(树)——1094 The Largest Generation （25 分）

1094 The Largest Generation （25 分） A family hierarchy is usually presented by a pedigree tree where all the nodes on the same level belong to the same...

PAT

2019-01-21

0 440

PAT(树)——1102 Invert a Binary Tree （25 分）

1102 Invert a Binary Tree （25 分） The following is from Max Howell @twitter: Google: 90% of our engineers use the software you wrote (Homebrew), but y...

PAT

2019-01-21

0 468

PAT(树)——1115 Counting Nodes in a BST （30 分）

1115 Counting Nodes in a BST （30 分） A Binary Search Tree (BST) is recursively defined as a binary tree which has the following properties: The left s...

PAT

2019-01-21

0 582

PAT(图)——1072 Gas Station （30 分）

1072 Gas Station （30 分） A gas station has to be built at such a location that the minimum distance between the station and any of the residential hous...

PAT

2019-01-29

0 807

PAT(图)——1076. Forwards on Weibo (30)

Weibo is known as the Chinese version of Twitter. One user on Weibo may have many followers, and may follow many other users as well. Hence a social n...

PAT

2019-01-29

0 449

PAT(散列)——1048 Find Coins （25 分）

Eva loves to collect coins from all over the universe, including some other planets like Mars. One day she visited a universal shopping mall which cou...

PAT

2019-01-30

0 377

PAT(散列)——1050. String Subtraction (20)

Given two strings S1 and S2, S = S1 – S2 is defined to be the remaining string after taking all the characters in S2 from S1. Your task is simply to c...

PAT

2019-01-30

0 411

PAT(散列)——1084. Broken Keyboard (20)

On a broken keyboard, some of the keys are worn out. So when you type some sentences, the characters corresponding to those keys will not appear on sc...

PAT

2019-01-30

0 476

PAT(动态规划)——1068. Find More Coins (30)

Eva loves to collect coins from all over the universe, including some other planets like Mars. One day she visited a universal shopping mall which cou...

PAT

2019-02-01

0 778