Valid_Parenthesis

java code
Valid_Parenthesis java
	new file:   Valid_Parenthesis/Valid_Parenthesis_By_Zhengliang_Yin.java
	deleted:    Valid_Parenthesis/Valid_Parenthesis_By_ZhengliangYin.java
remove wrongly

remove wrongly.. just for testing git command
Letter Combination java
	new file:   Letter_Combinations_of_a_Phone_Number/Letter_Combinations_of_a_Phone_Number_By_ZhengliangYin.java
Generate Parentheses

Generate Parentheses
Three Sum by Lu Gao
Remove threeSum b/c duplicates
Three Sum by Lu Gao
Remove Duplicates from Sorted Array java
remove elements
Next Permutation
Divide Two Integers
strStr
Substring with concatenation of All Words

It is version 1.0: It does work for all small data sets. but not large
data set.

The example is:

"abababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababa............."

["ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab","ba","ab"
...]

I have no idea about how to adjust to it yet. The wrong reason is Time
Limit Exceeded. I'm guessing it is because the remove and search is slow
for ArrayList, maybe i would change to Hash structure and then try some
other version.