#Algorithm

###Graph Implementation Tips

http://www.geeksforgeeks.org/depth-first-traversal-for-a-graph/

https://ece.uwaterloo.ca/~cmoreno/ece250/2012-03-26--graphs-implementation.pdf

http://www.algolist.net/Data_structures/Graph/Internal_representation

https://stackoverflow.com/questions/22120639/making-an-adjacency-list-in-c-for-a-directed-graph/22121060#22121060

###Priority queue for user-defined types

http://stackoverflow.com/questions/9178083/priority-queue-for-user-defined-types

C++ throw exception

http://stackoverflow.com/questions/8480640/how-to-throw-a-c-exception

Vector VS. List

http://stackoverflow.com/questions/2209224/vector-vs-list-in-stl

Prim VS. Dijkstra

http://stackoverflow.com/questions/14144279/difference-between-prims-and-dijkstras-algorithm

Vector iteration

http://stackoverflow.com/questions/409348/iteration-over-vector-in-c

Array of List

http://stackoverflow.com/questions/17897943/array-of-stdlist-c

C++ sort

http://stackoverflow.com/questions/5897319/how-to-use-stdsort-to-sort-an-array-in-c

#include <algorithm>

static const size_t v_size = 2000;
int v[v_size];
// Fill the array by values
std::sort(v,v+v_size); 

C++ compile on Mac

http://stackoverflow.com/questions/24462973/why-won-t-this-simple-c-code-compile-with-clang

$ clang++ -std=c++11 -stdlib=libc++ t.cpp

#OS

BlockingQueue

http://docs.oracle.com/javase/7/docs/api/java/util/concurrent/locks/Condition.html

http://stackoverflow.com/questions/20110013/implement-your-own-blocking-queue-in-java

###Memory Translation

http://programmers.stackexchange.com/questions/178921/how-many-bits-address-is-required-for-a-computer-with-n-bytes-of-memory?

###Java ProcessBuilder: Input/Output Stream http://stackoverflow.com/questions/11573457/java-processbuilder-input-output-stream

###Implements VS Extends http://stackoverflow.com/questions/10839131/implements-vs-extends-when-to-use-whats-the-difference

###A java file multiple classes http://stackoverflow.com/questions/968347/can-a-java-file-have-more-than-one-class

Difference between try/catch and throw

http://stackoverflow.com/questions/3794910/difference-between-try-catch-and-throw-in-java

CPU bound VS I/O bound

http://stackoverflow.com/questions/868568/what-do-the-terms-cpu-bound-and-i-o-bound-mean

Run a jar file

http://stackoverflow.com/questions/5774970/run-jar-file-in-command-prompt

###Java - Sockets

https://www.youtube.com/watch?v=6G_W54zuadg

Add external jar to Eclipse

https://www.genuitec.com/forums/topic/the-import-org-apache-log4j-can-not-be-resolved/

Use Junit test

https://courses.cs.washington.edu/courses/cse143/11wi/eclipse-tutorial/junit.shtml

Exception handle

http://blog.csdn.net/hguisu/article/details/6155636

Throwable and Exception

http://stackoverflow.com/questions/2274102/difference-between-using-throwable-and-exception-in-a-try-catch

#Discrete Math

###Set and Element Relations http://mathforum.org/library/drmath/view/62565.html

###Zero not a natural number http://mathforum.org/library/drmath/view/57186.html

###MergeSort

https://en.wikipedia.org/wiki/Merge_sort

###Divide

a divides b b is divided by a → b = ac // write as a|b

https://en.wikipedia.org/wiki/Division_(mathematics)

###GCD

		 	 b, if a = 0
gcd (a,b)〈  							//a < b 
  			 gcd(b mod a, a)
 

https://en.wikipedia.org/wiki/Greatest_common_divisor

###Counting Rules

http://utdallas.edu/~sizheng/2015/5333.d/l-notes.d/l-note5.pdf

http://krisyu.github.io/2015/more_counting_problem:principle/

###Pigeonhole principle

https://en.wikipedia.org/wiki/Pigeonhole_principle

Ramsey's theorem

https://en.wikipedia.org/wiki/Ramsey%27s_theorem