原创 145. Binary Tree Postorder Traversal
Given a binary tree, return the postorder traversal of its nodes' values. Example: Input: [1,null,2,3] 1 \
2019-03-22 19:59:02
原创 143. Reorder List
Given a singly linked list L: L0→L1→…→Ln-1→Ln, reorder it to: L0→Ln→L1→Ln-1→L2→Ln-2→… You may not modify the values in
2019-03-20 19:52:59
原创 logistic迴歸的多分類任務實現------鳶尾花數據（DATA MINING HOMEWORK)
鳶尾花問題： http://archive.ics.uci.edu/ml/machine-learning-databases/iris/iris.data 對於以上給出的數據集，用模型進行訓練，得到良好的分類器，分類模型。（要求用線性迴
2019-02-27 23:57:18
原创 131. Palindrome Partitioning
Given a string s, partition s such that every substring of the partition is a palindrome. Return all possible palindrom
2019-02-14 23:58:48
原创 167. Two Sum II - Input array is sorted
Given an array of integers that is already sorted in ascending order, find two numbers such that they add up to a speci
2019-02-10 23:45:58
1
原创 129. Sum Root to Leaf Numbers
Given a binary tree containing digits from 0-9 only, each root-to-leaf path could represent a number. An example is the
2019-02-08 23:54:16
原创 142. Linked List Cycle II
Given a linked list, return the node where the cycle begins. If there is no cycle, return null. To represent a cycle in
2019-02-05 23:37:05
3
原创 141. Linked List Cycle
Given a linked list, determine if it has a cycle in it. To represent a cycle in the given linked list, we use an intege
2019-02-04 00:04:09
原创 136. Single Number
Given a non-empty array of integers, every element appears twice except for one. Find that single one. Note: Your algor
2019-02-03 01:01:09
原创 121. Best Time to Buy and Sell Stock
Say you have an array for which the ith element is the price of a given stock on day i. If you were only permitted to c
2019-02-02 00:12:58
原创 120. Triangle
Given a triangle, find the minimum path sum from top to bottom. Each step you may move to adjacent numbers on the row b
2019-02-02 00:12:57
原创 125. Valid Palindrome
Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases. Note: For
2019-02-02 00:12:57
原创 122. Best Time to Buy and Sell Stock II
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 the
2019-02-02 00:12:57
原创 119. Pascal's Triangle II
Given a non-negative index k where k ≤ 33, return the kth index row of the Pascal's triangle. Note that the row index s
2019-01-27 23:42:29
原创 118. Pascal's Triangle
Given a non-negative integer numRows, generate the first numRows of Pascal's triangle. In Pascal's triangle, each numb
2019-01-27 23:42:18