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https://leetcode.com/problems/sort-characters-by-frequency/ Given a string, sort it in decreasing order based on the frequency of characters. Example 阅读全文
posted @ 2019-01-30 20:31
_Zlrrr
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https://leetcode.com/problems/sort-list/ Sort a linked list in O(n log n) time using constant space complexity. Example 1: Example 2: 代码： 归并排序 学到了 FHF 阅读全文
posted @ 2019-01-30 14:08
_Zlrrr
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https://pintia.cn/problem-sets/994805342720868352/problems/994805345078067200 Suppose that all the keys in a binary tree are distinct positive integer 阅读全文
posted @ 2019-01-30 13:43
_Zlrrr
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https://pintia.cn/problem-sets/994805342720868352/problems/994805344222429184 After each PAT, the PAT Center will announce the ranking of institutions 阅读全文
posted @ 2019-01-30 12:09
_Zlrrr
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https://pintia.cn/problem-sets/994805342720868352/problems/994805343979159552 A clique is a subset of vertices of an undirected graph such that every 阅读全文
posted @ 2019-01-30 11:21
_Zlrrr
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https://pintia.cn/problem-sets/994805342720868352/problems/994805343043829760 This is a problem given in the Graduate Entrance Exam in 2018: Which of 阅读全文
posted @ 2019-01-30 10:48
_Zlrrr
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https://pintia.cn/problem-sets/994805342720868352/problems/994805343727501312 The lowest common ancestor (LCA) of two nodes U and V in a tree is the d 阅读全文
posted @ 2019-01-30 10:24
_Zlrrr
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