lintcode practice

mostly here is the code I need to review again.

Name		Name	Last commit message	Last commit date
Latest commit History 13 Commits
1095. maximum-swap		1095. maximum-swap
173. Sort a linked list using insertion sort.		173. Sort a linked list using insertion sort.
242. convert binary tree to linked lists by depth		242. convert binary tree to linked lists by depth
35. Reverse Linked List		35. Reverse Linked List
56. Two Sum		56. Two Sum
69. Binary Tree Level Order Traversal		69. Binary Tree Level Order Traversal
97. Maximum Depth of Binary Tree		97. Maximum Depth of Binary Tree
Insert Node in a Binary Search Tree		Insert Node in a Binary Search Tree
README.md		README.md
Radar Detection		Radar Detection

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