Dev Universe (leethyun Blog)
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[Google Kick Start - Round A 2020] Workout
Mar 24, 2020
[Google Kick Start - Round A 2020] Plates
Mar 23, 2020
[Google Kick Start - Round A 2020] Allocation
Mar 22, 2020
[Codeforces 1326C] Permutation Partitions
Mar 21, 2020
[Codeforces 1326B] Maximums
Mar 20, 2020
[Codeforces 1326A] Bad Ugly Numbers
Mar 19, 2020
[LeetCode 172] Factorial Trailing Zeroes
Mar 18, 2020
[LeetCode 171] Excel Sheet Column Number
Mar 17, 2020
[LeetCode 169] Majority Element
Mar 16, 2020
[LeetCode 168] Excel Sheet Column Title
Mar 15, 2020
[LeetCode 176] Second Highest Salary
Mar 13, 2020
[LeetCode 175] Combine Two Tables
Mar 12, 2020
[Codeforces 1316D] Nash Matrix
Mar 11, 2020
[Codeforces 1323C] Unusual Competitions
Mar 10, 2020
[Codeforces 1323B] Count Subrectangles
Mar 9, 2020
[Codeforces 1323A] Even Subset Sum Problem
Mar 8, 2020
[LeetCode 122] Best Time to Buy and Sell Stock II
Mar 7, 2020
[LeetCode 121] Best Time to Buy and Sell Stock
Mar 6, 2020
[LeetCode 146] LRU Cache
Mar 5, 2020
[LeetCode 19] Remove Nth Node From End of List
Mar 4, 2020
[LeetCode 100] Same Tree
Mar 3, 2020
[LeetCode 28] Implement strStr()
Mar 2, 2020
[LeetCode 27] Remove Element
Mar 1, 2020
[LeetCode 26] Remove Duplicates from Sorted Array
Feb 29, 2020
[LeetCode 21] Merge Two Sorted Lists
Feb 28, 2020
[LeetCode 20] Valid Parentheses
Feb 27, 2020
[LeetCode 14] Longest Common Prefix
Feb 26, 2020
[LeetCode 13] Roman to Integer
Feb 25, 2020
[LeetCode 9] Palindrome Number
Feb 24, 2020
[LeetCode 7] Reverse Integer
Feb 23, 2020
[LeetCode 1] Two Sum
Feb 22, 2020
[LeetCode 35] Search Insert Position
Feb 18, 2020
[LeetCode 38] Count and Say
Feb 17, 2020
[LeetCode 53] Maximum Subarray
Feb 16, 2020
[LeetCode 58] Length of Last Word
Feb 15, 2020
[LeetCode 66] Plus One
Feb 14, 2020
[LeetCode 67] Add Binary
Feb 13, 2020
[LeetCode 70] Climbing Stairs
Feb 12, 2020
[LeetCode 83] Remove Duplicates from Sorted List
Feb 11, 2020
[LeetCode 88] Merge Sorted Array
Feb 10, 2020
[LeetCode 2] Add Two Numbers
Feb 9, 2020
[LeetCode 101] Symmetric Tree
Feb 8, 2020
[LeetCode 167] Two Sum II - Input array is sorted
Oct 24, 2019
[LeetCode 160] Intersection of Two Linked Lists
Oct 23, 2019
[LeetCode 155] Min Stack
Oct 22, 2019
[LeetCode 141] Linked List Cycle
Oct 21, 2019
[LeetCode 136] Single Number
Oct 20, 2019
[LeetCode 125] Valid Palindrome
Oct 19, 2019
[LeetCode 119] Pascal's Triangle II
Oct 17, 2019
[LeetCode 118] Pascal's Triangle
Oct 17, 2019
[LeetCode 112] Path Sum
Oct 16, 2019
[LeetCode 111] Minimum Depth of Binary Tree
Oct 15, 2019
[LeetCode 110] Balanced Binary Tree
Oct 14, 2019
[LeetCode 108] Convert Sorted Array to Binary Search Tree
Oct 13, 2019
[LeetCode 107] Binary Tree Level Order Traversal II
Oct 12, 2019
[LeetCode 104] Maximum Depth of Binary Tree
Oct 11, 2019
Unix System Programming
Oct 8, 2019
Internet
Oct 5, 2019
Shell
Sep 18, 2019
File & Directory
Sep 7, 2019
Linux Command
Sep 7, 2019
[BOJ 17261] 석유가 넘쳐흘러
Sep 5, 2019
[Google Kick Start - Round E] Code-Eat Switcher
Sep 1, 2019
[Google Kick Start - Round E] Cherries Mesh
Aug 30, 2019
Unix
Aug 29, 2019
[Algospot] FESTIVAL - 록 페스티벌
Aug 27, 2019
POJO
Jun 8, 2019
State Management
Jun 3, 2019
Transaction
Jun 2, 2019
DNS
Jun 1, 2019
Request & Response Processing of Spring Framework
May 31, 2019
Spring Framework
May 30, 2019
System Call
May 26, 2019
User Mode & Kernel Mode
May 25, 2019
Kernel
May 24, 2019
Message Oriented Middleware
May 21, 2019
Middleware
May 20, 2019
Method of Mutual Exclusion - Semaphore
May 7, 2019
Method of Mutual Exclusion - TAS
May 5, 2019
Method of Mutual Exclusion - Dekker Algorithm
May 1, 2019
Mutual Exclusion
May 1, 2019
Interrupt & Context Switching
Apr 30, 2019
Insertion Sort
Apr 29, 2019
Bubble Sort
Apr 28, 2019
Selection Sort
Apr 27, 2019
Merge Sort
Apr 26, 2019
Heap Sort
Apr 24, 2019
Quick Sort
Apr 22, 2019
Structural Programming
Apr 21, 2019
Expressions
Apr 20, 2019
Languages Syntax
Apr 19, 2019
Implementation Method of Programming Languages
Apr 17, 2019
Programming Paradigm
Apr 16, 2019
Program Processing Method
Apr 15, 2019
Design Principles of Programming Languages
Apr 12, 2019
Programming Languages
Apr 11, 2019
Factory Method Pattern
Apr 10, 2019
Template Method Pattern
Apr 9, 2019
Decorator Pattern
Apr 8, 2019
Observer Pattern
Apr 7, 2019
Shopping Mall Project 5 - Signup, Signin, Signout
Mar 31, 2019
Shopping Mall Project 4 - Create Tables, Value Objects
Mar 29, 2019
Shopping Mall Project 3 - Korean Encoding(UTF-8) Setting
Mar 28, 2019
Linked List
Mar 28, 2019
Shopping Mall Project 2 - SQL Connection Setting
Mar 27, 2019
Shopping Mall Project 1 - 작업 환경 설정
Mar 26, 2019
Command Pattern
Mar 24, 2019
State Pattern
Mar 23, 2019
Encryption Algorithm
Mar 22, 2019
Singleton Pattern
Mar 21, 2019
Strategy Pattern
Mar 20, 2019
Design Pattern
Mar 19, 2019
SOLID Principles
Mar 18, 2019
Basics of Object Orientation
Mar 17, 2019
Object Oriented Modeling
Mar 16, 2019
IP, TCP, DNS
Mar 15, 2019
TCP/IP
Mar 14, 2019
WWW
Mar 12, 2019
Micro Service
Mar 11, 2019
MST
Mar 9, 2019
Graph(SCC)
Mar 8, 2019
Graph(Topological Sort)
Mar 6, 2019
Graph(DFS)
Mar 4, 2019
Graph
Mar 3, 2019
Articualtion(Cut) Vertex, Edge in Undirected Graph
Feb 28, 2019
Geometry(Closest Pair)
Feb 27, 2019
Geometry(Convex Hull)
Feb 26, 2019
Geometry(Polygon)
Feb 25, 2019
Geometry(CCW)
Feb 24, 2019
Geometry(Get Angle aob)
Feb 23, 2019
Geometry(Shortest Distance between Point and Segment)
Feb 22, 2019
Geometry(Shortest Distance between Point and Line)
Feb 21, 2019
Geometry(Vector)
Feb 20, 2019
Geometry(Line)
Feb 19, 2019
Geometry(Point)
Feb 18, 2019
Interval Scheduling
Feb 16, 2019
Process & Thread
Feb 15, 2019
HTTP
Feb 13, 2019
How the Web works
Feb 13, 2019
CORS Policy
Feb 11, 2019
Proxy Server
Feb 10, 2019
Service Oriented Architecture
Feb 9, 2019
Micro Service Architecture
Feb 9, 2019
Aspect Oriented Programming
Feb 8, 2019
Transaction
Feb 7, 2019
Root Context & Servlet Context
Feb 5, 2019
Object Oriented - Reference
Feb 4, 2019
Object Oriented - Data Type
Feb 3, 2019
Object Oriented - Object
Feb 2, 2019
Object Oriented - Extension of standard embedded object
Feb 1, 2019
Object Oriented - Inheritance
Jan 31, 2019
Object Oriented - this
Jan 30, 2019
Object Oriented - Global Object
Jan 28, 2019
Object Oriented - constructor, new
Jan 27, 2019
Object Oriented Programming
Jan 26, 2019
Function Oriented - Calling Function
Jan 25, 2019
Function Oriented - Closure
Jan 24, 2019
Function Oriented - Arguments
Jan 19, 2019
RESTful API
Jan 15, 2019
Function Oriented - Function by value & Callback
Jan 13, 2019
Function Oriented - Scoping
Jan 12, 2019
Object
Jan 11, 2019
Array
Jan 10, 2019
Function
Jan 9, 2019
Debug
Jan 8, 2019
Regular Expression
Jan 7, 2019
Data Type
Jan 6, 2019
Compare Operator
Jan 5, 2019
Object-Oriented Programming
Jan 4, 2019
Network Programming
Jan 3, 2019
[BOJ 1208] 부분집합의 합 2
Jan 2, 2019
[BOJ 1644] 소수의 연속합
Jan 1, 2019
[BOJ 1261] 알고스팟
Jan 1, 2019
2018 회고
Dec 31, 2018
Android Setting
Dec 30, 2018
Thread
Dec 29, 2018
Garbage Collection
Dec 28, 2018
클래스, 객체와 인스턴스
Dec 27, 2018
Java의 표준 입출력
Dec 26, 2018
Java의 실행 과정
Dec 25, 2018
[BOJ 15761] Lemonade Line
Dec 23, 2018
[BOJ 15760] Out of Sorts
Dec 23, 2018
[BOJ 2580] 스도쿠
Dec 21, 2018
[BOJ 15762] Multiplayer Moo
Dec 20, 2018
[Google Kick Start - Round A 2020] Workout
Mar 24, 2020
[Google Kick Start - Round A 2020] Plates
Mar 23, 2020
[Google Kick Start - Round A 2020] Allocation
Mar 22, 2020
[Codeforces 1326C] Permutation Partitions
Mar 21, 2020
[Codeforces 1326B] Maximums
Mar 20, 2020
[Codeforces 1326A] Bad Ugly Numbers
Mar 19, 2020
[LeetCode 172] Factorial Trailing Zeroes
Mar 18, 2020
[LeetCode 171] Excel Sheet Column Number
Mar 17, 2020
[LeetCode 169] Majority Element
Mar 16, 2020
[LeetCode 168] Excel Sheet Column Title
Mar 15, 2020
[LeetCode 176] Second Highest Salary
Mar 13, 2020
[LeetCode 175] Combine Two Tables
Mar 12, 2020
[Codeforces 1316D] Nash Matrix
Mar 11, 2020
[Codeforces 1323C] Unusual Competitions
Mar 10, 2020
[Codeforces 1323B] Count Subrectangles
Mar 9, 2020
[Codeforces 1323A] Even Subset Sum Problem
Mar 8, 2020
[LeetCode 122] Best Time to Buy and Sell Stock II
Mar 7, 2020
[LeetCode 121] Best Time to Buy and Sell Stock
Mar 6, 2020
[LeetCode 146] LRU Cache
Mar 5, 2020
[LeetCode 19] Remove Nth Node From End of List
Mar 4, 2020
[LeetCode 100] Same Tree
Mar 3, 2020
[LeetCode 28] Implement strStr()
Mar 2, 2020
[LeetCode 27] Remove Element
Mar 1, 2020
[LeetCode 26] Remove Duplicates from Sorted Array
Feb 29, 2020
[LeetCode 21] Merge Two Sorted Lists
Feb 28, 2020
[LeetCode 20] Valid Parentheses
Feb 27, 2020
[LeetCode 14] Longest Common Prefix
Feb 26, 2020
[LeetCode 13] Roman to Integer
Feb 25, 2020
[LeetCode 9] Palindrome Number
Feb 24, 2020
[LeetCode 7] Reverse Integer
Feb 23, 2020
[LeetCode 1] Two Sum
Feb 22, 2020
[LeetCode 35] Search Insert Position
Feb 18, 2020
[LeetCode 38] Count and Say
Feb 17, 2020
[LeetCode 53] Maximum Subarray
Feb 16, 2020
[LeetCode 58] Length of Last Word
Feb 15, 2020
[LeetCode 66] Plus One
Feb 14, 2020
[LeetCode 67] Add Binary
Feb 13, 2020
[LeetCode 70] Climbing Stairs
Feb 12, 2020
[LeetCode 83] Remove Duplicates from Sorted List
Feb 11, 2020
[LeetCode 88] Merge Sorted Array
Feb 10, 2020
[LeetCode 2] Add Two Numbers
Feb 9, 2020
[LeetCode 101] Symmetric Tree
Feb 8, 2020
[LeetCode 167] Two Sum II - Input array is sorted
Oct 24, 2019
[LeetCode 160] Intersection of Two Linked Lists
Oct 23, 2019
[LeetCode 155] Min Stack
Oct 22, 2019
[LeetCode 141] Linked List Cycle
Oct 21, 2019
[LeetCode 136] Single Number
Oct 20, 2019
[LeetCode 125] Valid Palindrome
Oct 19, 2019
[LeetCode 119] Pascal's Triangle II
Oct 17, 2019
[LeetCode 118] Pascal's Triangle
Oct 17, 2019
[LeetCode 112] Path Sum
Oct 16, 2019
[LeetCode 111] Minimum Depth of Binary Tree
Oct 15, 2019
[LeetCode 110] Balanced Binary Tree
Oct 14, 2019
[LeetCode 108] Convert Sorted Array to Binary Search Tree
Oct 13, 2019
[LeetCode 107] Binary Tree Level Order Traversal II
Oct 12, 2019
[LeetCode 104] Maximum Depth of Binary Tree
Oct 11, 2019
[BOJ 17261] 석유가 넘쳐흘러
Sep 5, 2019
[Google Kick Start - Round E] Code-Eat Switcher
Sep 1, 2019
[Google Kick Start - Round E] Cherries Mesh
Aug 30, 2019
[Algospot] FESTIVAL - 록 페스티벌
Aug 27, 2019
Insertion Sort
Apr 29, 2019
Bubble Sort
Apr 28, 2019
Selection Sort
Apr 27, 2019
Merge Sort
Apr 26, 2019
Heap Sort
Apr 24, 2019
Quick Sort
Apr 22, 2019
MST
Mar 9, 2019
Graph(SCC)
Mar 8, 2019
Graph(Topological Sort)
Mar 6, 2019
Graph(DFS)
Mar 4, 2019
Graph
Mar 3, 2019
Articualtion(Cut) Vertex, Edge in Undirected Graph
Feb 28, 2019
Geometry(Closest Pair)
Feb 27, 2019
Geometry(Convex Hull)
Feb 26, 2019
Geometry(Polygon)
Feb 25, 2019
Geometry(CCW)
Feb 24, 2019
Geometry(Get Angle aob)
Feb 23, 2019
Geometry(Shortest Distance between Point and Segment)
Feb 22, 2019
Geometry(Shortest Distance between Point and Line)
Feb 21, 2019
Geometry(Vector)
Feb 20, 2019
Geometry(Line)
Feb 19, 2019
Geometry(Point)
Feb 18, 2019
Interval Scheduling
Feb 16, 2019
[BOJ 1208] 부분집합의 합 2
Jan 2, 2019
[BOJ 1644] 소수의 연속합
Jan 1, 2019
[BOJ 1261] 알고스팟
Jan 1, 2019
[BOJ 15761] Lemonade Line
Dec 23, 2018
[BOJ 15760] Out of Sorts
Dec 23, 2018
[BOJ 2580] 스도쿠
Dec 21, 2018
[BOJ 15762] Multiplayer Moo
Dec 20, 2018
SOLID Principles
Mar 18, 2019
Basics of Object Orientation
Mar 17, 2019
Object Oriented Modeling
Mar 16, 2019
Object-Oriented Programming
Jan 4, 2019
Network Programming
Jan 3, 2019
Thread
Dec 29, 2018
Garbage Collection
Dec 28, 2018
클래스, 객체와 인스턴스
Dec 27, 2018
Java의 표준 입출력
Dec 26, 2018
Java의 실행 과정
Dec 25, 2018
Object Oriented - Reference
Feb 4, 2019
Object Oriented - Data Type
Feb 3, 2019
Object Oriented - Object
Feb 2, 2019
Object Oriented - Extension of standard embedded object
Feb 1, 2019
Object Oriented - Inheritance
Jan 31, 2019
Object Oriented - this
Jan 30, 2019
Object Oriented - Global Object
Jan 28, 2019
Object Oriented - constructor, new
Jan 27, 2019
Object Oriented Programming
Jan 26, 2019
Function Oriented - Calling Function
Jan 25, 2019
Function Oriented - Closure
Jan 24, 2019
Function Oriented - Arguments
Jan 19, 2019
Function Oriented - Function by value & Callback
Jan 13, 2019
Function Oriented - Scoping
Jan 12, 2019
Object
Jan 11, 2019
Array
Jan 10, 2019
Function
Jan 9, 2019
Debug
Jan 8, 2019
Regular Expression
Jan 7, 2019
Data Type
Jan 6, 2019
Compare Operator
Jan 5, 2019
POJO
Jun 8, 2019
Request & Response Processing of Spring Framework
May 31, 2019
Spring Framework
May 30, 2019
Shopping Mall Project 5 - Signup, Signin, Signout
Mar 31, 2019
Shopping Mall Project 4 - Create Tables, Value Objects
Mar 29, 2019
Shopping Mall Project 3 - Korean Encoding(UTF-8) Setting
Mar 28, 2019
Shopping Mall Project 2 - SQL Connection Setting
Mar 27, 2019
Shopping Mall Project 1 - 작업 환경 설정
Mar 26, 2019
Aspect Oriented Programming
Feb 8, 2019
Transaction
Feb 7, 2019
Root Context & Servlet Context
Feb 5, 2019
Unix System Programming
Oct 8, 2019
Shell
Sep 18, 2019
File & Directory
Sep 7, 2019
Linux Command
Sep 7, 2019
Unix
Aug 29, 2019
System Call
May 26, 2019
User Mode & Kernel Mode
May 25, 2019
Kernel
May 24, 2019
Method of Mutual Exclusion - Semaphore
May 7, 2019
Method of Mutual Exclusion - TAS
May 5, 2019
Method of Mutual Exclusion - Dekker Algorithm
May 1, 2019
Mutual Exclusion
May 1, 2019
Interrupt & Context Switching
Apr 30, 2019
Process & Thread
Feb 15, 2019