摘要：
Given the root of a Binary Search Tree and a target number k, return true if there exist two elements in the BST such that their sum is equal to the g 阅读全文
posted @ 2020-12-27 03:43
北叶青藤
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摘要：
Given two strings s1 and s2, write a function to return true if s2 contains the permutation of s1. In other words, one of the first string's permutati 阅读全文
posted @ 2020-12-27 03:24
北叶青藤
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Given a directed acyclic graph (DAG) of n nodes labeled from 0 to n - 1, find all possible paths from node 0 to node n - 1, and return them in any ord 阅读全文
posted @ 2020-12-27 02:45
北叶青藤
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摘要：
Given an array of positive integers arr (not necessarily distinct), return the lexicographically largest permutation that is smaller than arr, that ca 阅读全文
posted @ 2020-12-27 01:47
北叶青藤
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You are given some lists of regions where the first region of each list includes all other regions in that list. Naturally, if a region X contains ano 阅读全文
posted @ 2020-12-27 00:54
北叶青藤
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