Prepare for those easy level math algorithms

Sept. 4, 2018

Introduction

It is 11:48 PM. I like to work on those 25 math easy level algorithms. I like to memorize the algorithms before I work on those algorithms as well.

I like to design a drill for me to get comfortable to solve algorithms every day.

25 easy level math algorithms

Here is the snapshot I got from Leetcode.com

#	Title	Acceptance	Difficulty	Frequency
	728	Self Dividing Numbers	67.0%	Easy
	883	Projection Area of 3D Shapes	66.4%	Easy
	868	Binary Gap	59.8%	Easy
	892	Surface Area of 3D Shapes	55.0%	Easy
	800	Similar RGB Color	54.9%	Easy
	812	Largest Triangle Area	53.8%	Easy
	258	Add Digits	52.5%	Easy
	171	Excel Sheet Column Number	49.6%	Easy
	13	Roman to Integer	49.4%	Easy
	453	Minimum Moves to Equal Array Elements	48.3%	Easy
	598	Range Addition II	47.9%	Easy
	268	Missing Number	46.0%	Easy
	628	Maximum Product of Three Numbers	44.8%	Easy
	836	Rectangle Overlap	43.3%	Easy
	202	Happy Number	42.6%	Easy
	415	Add Strings	42.0%	Easy
	231	Power of Two	41.1%	Easy
	326	Power of Three	41.0%	Easy
	246	Strobogrammatic Number	40.7%	Easy
	263	Ugly Number	40.0%	Easy
	66	Plus One	40.0%	Easy
	645	Set Mismatch	39.8%	Easy
	367	Valid Perfect Square	38.8%	Easy
	9	Palindrome Number	38.1%	Easy
	172	Factorial Trailing Zeroes	37.0%	Easy
	441	Arranging Coins	36.7%	Easy
	67	Add Binary	35.5%	Easy
	507	Perfect Number	32.7%	Easy
	633	Sum of Square Numbers	32.4%	Easy
	400	Nth Digit	29.9%	Easy
	69	Sqrt(x)	29.5%	Easy
	168	Excel Sheet Column Title	27.9%	Easy
	204	Count Primes	27.0%	Easy
	7	Reverse Integer	24.4%	Easy

Follow up

Sept. 22, 2018

I spent time to go over blogs related to keyword search: solve easy level algorithms, and I found the blog that I started to prepare to work on 50 easy level algorithm August 14, 2018. 

From August 14 to Sept 4, 2018, I solved 50 easy level array algorithms. 

Easy level algorithms with array tag

August 14, 2018

Introduction

It is time for me to build a good habit to write code any time, every time I like to take 15 minutes break. The idea is to work on easy level algorithm, so that I can easily work on problem solving, and also start to learn ideas how to solve problems.

Array algorithm

There are over 50 easy level algorithms for me to solve. Here is the link.

The idea of training is to relax and solve easy level algorithms first. Once I master the easy level algorithm, I have more ideas to solve other algorithms. I am so excited to solve 1 - 2 easy level algorithms before I go to bed every day.

I also like to make the training of algorithm much easy to handle. Every day I enjoy to do some task trivial, know more hard working people on Leetcode discuss, and then get used to solve problem. The more relax I am, the more often I will write code for an algorithm.

I like to build a good habit to code every day.

Take it easy.

Follow up 

Oct 24, 2019

I just wrote three easy level algorithm in less than one hour. I felt so good, since I can push my solved algorithm to 440 very quickly. Now I solved 439 algorithms.

Why is it so hard for me to be humble? I just treat myself as a child. I like to learn to do some coding. I just write 10 easy level Array tag algorithms first.

It is like tennis sports. I should warm up 10 - 15 minutes every time I go out to play. The warm up drills can be completed by hitting against the wall, or hitting against a hitting partner.

Life is easy if I choose to work on easy level algorithms first.

It is so hard for me to admit it. I should be proud of myself, this year I have Amazon and Facebook onsite. After August 20, 2019 Facebook onsite, it is hard for me to go back to my daily routine to study system design, or algorithm practice. I chose to work on interviews on interviewing.io as an interviewer, I met so many engineers, and I learned from their performance, some of them shared their onsite interview experience with me as well. Just relax, and start from ground zero, work on basics again.

Now it is Oct. 24, 2019. It takes me two months to recover, and find joys to work on algorithm coding again. Easy level algorithm, array tag algorithm makes me such a great problem solver.