原创 LeetCode 刷題筆記之 全排列 in Java
題目如下：Given a collection of distinct integers, return all possible permutations.Example:Input: [1,2,3] Output: [ [1,2
2020-02-20 18:29:23
原创 LeetCode 刷題筆記之 排高度
題目如下：Suppose you have a random list of people standing in a queue. Each person is described by a pair of integers (h, k
2020-02-20 18:29:23
原创 LeetCode 刷題筆記 之 迴文子串
題目如下：Given a string, your task is to count how many palindromic substrings in this string.The substrings with different
2020-02-20 18:29:23
原创 LeetCode 刷題筆記 之 頻率最高的k個數（Top K Frequent Elements）
題目如下：Given a non-empty array of integers, return the k most frequent elements.For example,Given [1,1,1,2,2,3] and k = 2
2020-02-20 18:29:23
原创 LeetCode 刷題筆記 之 Word Break
題目如下：Given a non-empty string s and a dictionary wordDict containing a list of non-empty words, determine if s can be s
2018-09-05 05:37:27
原创 LeetCode 刷題筆記 之 Maximum Product Subarray
題目如下：Given an integer array nums, find the contiguous subarray within an array (containing at least one number) which h
2018-09-05 05:37:26
原创 LeetCode 刷題筆記 之 Lowest Common Ancestor of a Binary Tree
題目如下：Given a binary tree, find the lowest common ancestor (LCA) of two given nodes in the tree.According to the definit
2018-09-05 05:37:26
原创 LeetCode 刷題筆記 之 Course Schedule
題目如下：There are a total of n courses you have to take, labeled from 0 to n-1.Some courses may have prerequisites, for ex
2018-09-05 05:37:26
原创 LeetCode 刷題筆記 之 Construct Binary Tree from Preorder and Inorder Traversal
題目如下：Given preorder and inorder traversal of a tree, construct the binary tree.Note:You may assume that duplicates do n
2018-09-05 05:37:26
原创 LeetCode 刷題筆記 之 Number of Islands
題目如下：Given a 2d grid map of '1's (land) and '0's (water), count the number of islands. An island is surrounded by water
2018-09-05 05:37:26
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原创 LeetCode 刷題筆記 之 Partition Equal Subset Sum
題目如下：Given a non-empty array containing only positive integers, find if the array can be partitioned into two subsets s
2018-09-05 05:37:26
原创 LeetCode 刷題筆記 之 Maximal Square
題目如下：Given a 2D binary matrix filled with 0's and 1's, find the largest square containing only 1's and return its area.
2018-09-05 05:37:25
原创 LeetCode 刷題筆記 之 Sort List
題目如下：Sort a linked list in O(n log n) time using constant space complexity.Example 1:Input: 4->2->1->3 Output: 1->2->3-
2018-09-05 05:37:25
原创 LeetCode 刷題筆記 之 Convert BST to Greater Tree
題目如下：Given a Binary Search Tree (BST), convert it to a Greater Tree such that every key of the original BST is changed
2018-09-05 05:37:25
原创 LeetCode 刷題筆記 之 Best Time to Buy and Sell Stock with Cooldown
題目如下：Say you have an array for which the ith element is the price of a given stock on day i.Design an algorithm to find
2018-09-05 05:37:25