Given a string s, return the longest palindromic substring in s.Example:
Input: s = "babad"
Output: "bab"
Note: "aba" is also a valid answer.題目給定一個輸入字串，而我們要在這個字串中，找到最大的『回文子字串』。回文（palindromic）是什麼意思呢？就是即使字串顛倒過來也是相同的，就好比範例中的 bab 一樣，顛倒過來同樣是 bab。
不過這題要求回傳的答案只要是任一最長的回文子字串即可，不需要回傳『全部』的答案，也算是某種程度的佛心來著？（雖說只要將最長的都記錄起來就行了）
Read More »LeetCode: 5-Longest Palindromic Substring 解題紀錄 The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility)
P A H N
A P L S I I G
Y I R
And then read line by line: "PAHNAPLSIIGYIR"
Write the code that will take a string and make this conversion given a number of rows:
string convert(string s, int numRows);Example:
Input: s = "PAYPALISHIRING", numRows = 4
Output: "PINALSIGYAHRPI"
Explanation:
P I N
A L S I G
Y A H R
P I這個題目給定輸入一個字串以及行高 numRows，我們將其重新排序成 Z 字型，並再次按照一行行的順序重新回傳字串。
也就是將這一字串重組。
Read More »LeetCode: 6-ZigZag Conversion 解題紀錄
Given two sorted arrays nums1 and nums2 of size m and n respectively, return the median of the two sorted arrays.
Follow up: The overall run time complexity should be O(log (m+n)).Given a string s, find the length of the longest substring without repeating characters.You are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse order, and each of their nodes contains a single digit. Add the two numbers and return the sum as a linked list.
You may assume the two numbers do not contain any leading zero, except the number 0 itself.Given an array of integers nums and an integer target, return indices of the two numbers such that they add up to target. You may assume that each input would have exactly one solution, and you may not use the same element twice. You can return the answer in any order.Read More »LeetCode: 1-Two Sum 解題紀錄
就在最近，終於狠下心來買了第二代的 Apple Pencil，主要目的就是來練習電繪。過去其實有買過便宜的電繪板來試著學習，不過想必是真的買便宜了，那出來的線條跟我想像中的完全不同，整個感應不良。
Read More »[iPad] 基本免費的繪圖軟體 MediBang Paint 
pkbar 是最近在閱讀他人對於 pointer-generator network 實現時意外看到的一種『進度條』實現方法，號稱可以在 PyTorch 上使用 Keras 風格的進度條。 的確，Keras 預設的進度條還滿淺顯易懂，比起需要自己去印出進度條的 PyTorch 來說使用上更加快速。
當然，其實不僅是可以在 PyTorch 框架的程式碼中使用，也可以在任何迴圈中使用。
Read More »[PyTorch] 使用 Keras 風格進度條的套件： pkbar