#Chao Xu's LeetCode Notes

# Title	Difficulty	Analysis	Code
1 Two Sum	Medium		[C++] (./C++/Two Sum.cpp), [Java] (./Java/Two Sum.java)
2 Add Two Numbers	Medium		[C++] (./C++/Add Two Numbers.cpp), [Java] (./Java/Add Two Numbers.java)
3 Longest Substring Without Repeating Characters	Medium		[C++] (./C++/Longest Substring Without Repeating Characters.cpp), [Java] (./Java/Longest Substring Without Repeating Characters.java)