Eryn's blog

CNN Deep Learning Notes

卷积神经网络学习笔记

Covolutinal Neural Network 数据量降维有效保留图片特征，有效表示出spatial structure Before CNN, problem of applying Fully NN to Image Data: Too many parameters require a lot of data Does not capture the s...

Posted by Eryn on April 25, 2020

Learning Git

Git 学习笔记

参考自廖雪峰老师博客教程和阮一峰老师网络日志分支管理查看分支git branch 创建分支git branch <name> 切换分支git checkout <name>,git switch <name> 创建+切换分支git checkout -b <name>, git switch -c <name...

Posted by Eryn on April 24, 2020

Leetcode Basic Problems Checklist

基础编程题总结

### CheckList 所有要背诵的模板： LRU LFU quicksort mergesort binary search merge K sorted list Add 2 numbers number of islands combination sum permutations subsets Pre-order tree tr...

Posted by Eryn on March 2, 2020

Cyber Security - Information Security

网络安全基础知识 - 信息安全

Information of value secret info processed info gathered info (big data) information vs property rivalrous property: one person’s use precludes another’s. If i drink the milk, you ca...

Posted by Eryn on February 12, 2020

Two-Pointers Problems

双指针题型总结

Two References 同向指针两个指针从头到尾或从尾到头遍历第一个指针用于遍历第二个指针在满足一定掉条件移动 sliding window Problems 1. 283 Move Zeroes (easy) Given an array nums, write a function to move all 0’s to the end of it while maint...

Posted by Eryn on January 14, 2020

Bitwise Operators

位运算笔记

Bitwise Operators used to perform manipulation of individual bits of a number can be used with any of the integral types (char, short, int, etc). used when performing update and query operations...

Posted by Eryn on January 13, 2020

Vocabulary in Coding Problems

编程题目中的生词

ermutation 排列 lexicographically order 词典编纂的顺序

Posted by Eryn on January 12, 2020

Back Tracking & DFS

回溯法总结

BackTracking 弱点：找不准dfs return的条件 class Solution { /** * @param S: A set of numbers. * @return: A list of lists. All valid subsets. */ public ArrayList<ArrayList<Intege...

Posted by Eryn on January 5, 2020

Leetcode 242 Valid Anagram

力扣242笔记：有效的字母异位词

作为hash table的方法之一，什么是ASCII？为什么 int[] hashtable = new int[128]/[256] then hashtable[某些char 242. Valid Anagram Given two strings s and t , write a function to determine if t is an anagram of s app...

Posted by Eryn on January 4, 2020

Leedcode Top 100

力扣常见100题

Questions: sliding window & hashtable Commonly used tables are: int[26] for Letters ‘a’ - ‘z’ or ‘A’ - ‘Z’ int[128] for ASCII int[256] for Extended ASCII p...

Posted by Eryn on December 1, 2019

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