weekend planning - easy dynamic programming algorithm

July 28, 2018

Introduction

It is my job to make life easy as a software programmer. So I like to do training in the weekend. One of great ideas is to train easy level algorithms first. I like to build up problems solved in quantity first.

I really enjoy the problem solving of dynamic programming.

Easy level dynamic programming algorithms

I like to list easy level dynamic programming algorithms and think about how to learn from those algorithms this weekend.

Problems solved: 303, 198, 121

879	Profitable Schemes	N/A	Easy
	303	Range Sum Query - Immutable	33.4%	Easy
	276	Paint Fence	35.2%	Easy
	198	House Robber	40.3%	Easy
	53	Maximum Subarray	40.8%	Easy
	70	Climbing Stairs	41.7%	Easy
	746	Min Cost Climbing Stairs	43.8%	Easy
	121	Best Time to Buy and Sell Stock	43.8%	Easy
	256	Paint House	46.6%	Easy

weekend planning - easy tree level algorithms

July 28, 2018

Introduction

It is time for me to plan to work on easy level tree algorithms. Here is the link and I use it to find all easy level tree algorithms I plan to work on this Saturday.

Over ten tree algorithms

I like to write down every easy level tree algorithm by name. I am planning to work on those algorithm today.

Easy level algorithms I completed: 687, 110, 572, 2235, 101, 671, 543, 108, 563, 100, 538, 606, 226, 104, 872, 617.

Easy level algorithms for me to work on:
111, 112, 501, 437, 589, 270, 700, 429, 257, 107, 590, 404, 559, 653, 637, 669

687 Longest Univalue Path 32.7% Easy 111 Minimum Depth of Binary Tree 33.9% Easy 112 Path Sum 35.5% Easy 501 Find Mode in Binary Search Tree 37.8% Easy 110 Balanced Binary Tree 38.9% Easy 572 Subtree of Another Tree 40.3% Easy 437 Path Sum III 40.3% Easy 235 Lowest Common Ancestor of a Binary Search Tree 40.6% Easy 101 Symmetric Tree 41.0% Easy 589 N-ary Tree Preorder Traversal 41.2% Easy 270 Closest Binary Search Tree Value 41.3% Easy 671 Second Minimum Node In a Binary Tree 42.1% Easy 700 Search in a Binary Search Tree 42.1% Easy 429 N-ary Tree Level Order Traversal 42.4% Easy 257 Binary Tree Paths 42.4% Easy 107 Binary Tree Level Order Traversal II 43.2% Easy 543 Diameter of Binary Tree 45.2% Easy 108 Convert Sorted Array to Binary Search Tree 45.7% Easy 563 Binary Tree Tilt 46.9% Easy 590 N-ary Tree Postorder Traversal 46.9% Easy 404 Sum of Left Leaves 47.9% Easy 100 Same Tree 48.2% Easy 538 Convert BST to Greater Tree 48.8% Easy 559 Maximum Depth of N-ary Tree 49.4% Easy 606 Construct String from Binary Tree 50.2% Easy 653 Two Sum IV - Input is a BST 50.3% Easy 226 Invert Binary Tree 54.4% Easy 104 Maximum Depth of Binary Tree 56.2% Easy 637 Average of Levels in Binary Tree 56.3% Easy 669 Trim a Binary Search Tree 58.1% Easy 872 Leaf-Similar Trees 65.0% Easy 617 Merge Two Binary Trees 68.1% Eas

Where to find most hard working people?

July 28, 2018

Introduction

It is so surprising that I found a few people with thousand submission last year on leetcode, and I also read his post on one of algorithms I worked on in the evening of July 27, 2018. I know that I am out-of-date on this topic, where to find most hard working people? I also need to find some facts to support my training decision, work on Leetcode easy level algorithms.

Two role models

Those people with thousand submission last year should be my role model. I like to list two of them here, I like to train myself as they do using Leetcode online judge.

Engineer Tian Yuan:

Leetcode 687 Longest univalue path -> discussion link ->
https://leetcode.com/tyuan73/ -> Linkedin profile, solved 652/ 869, 1168 submissions last year
(Follow up on May 22, 2019 solved 783/1045, 737 submission last year, 2209/3697)

Engineer Naveen:

Leetcode 687 longest univalue path -> discussion link ->
https://leetcode.com/naveenkothamasu/ -> 1641 submissions last year, solved questions: 345/869

(Follow up on Sept. 5, 2019, soved 610/1778, contest ranking: 10932/112269)

Easy level algorithm training so amazing 

I just could not believe that the training of Leetcode easy level algorithms is so amazing. I also have the chance to learn from most hard working people as a software engineer.

Leetcode easy level algorithm training progress report

July 28, 2018

Introduction

It is time for me to write a report for my last two report Leetcode easy level training. I have worked so hard and then I submitted more than 30 algorithms in two weeks. This is the first time I did submit 30 algorithms in less than two weeks.

Progress report

Here are some facts:

1. My leetcode profile is here.  130/869, 147 submissions last year.
2. July 17 - July 31, 2018 two weeks practice github folder containing all source code. Here is the link.

I had chance to read more content about algorithms, and those content could not find using Google or other resource. I find most hard working people who know how to train themselves so hard.

I have so many issues with those easy level algorithms. I just could not enumerate how many times I stumble and how many things I like to learn from those algorithms. I have to push myself hard and also try to move forward with new algorithms.

I change my attitude, I do not stay on same emotion too long. I need to go to work, solve an algorithm and write code. I have to take risk to implement my idea first, and then talk to myself to simplify the idea, and beat the odds to finish in less than 10 minutes. Sometimes I give up and start a brand new ideas.