摘要：
Given an unsorted array of nonnegative integers, find a continous subarray which adds to a given number. Examples: There may be more than one subarray 阅读全文
摘要：
Given a binary tree, generate all root to leaf paths of a binary tree. Example: Example Tree The output for the above example is [[1, 2, 4], [1, 2, 5] 阅读全文