摘要：
1、 Given a collection of intervals, merge all overlapping intervals. 阅读全文
摘要：
1、 Given an array of integers, find a contiguous subarray which has the largest sum. Given the array [−2,2,−3,4,−1,2,1,−5,3], the contiguous subarray 阅读全文
摘要：
1、 Given a binary tree, find its maximum depth. The maximum depth is the number of nodes along the longest path from the root node down to the farthes 阅读全文
摘要：
1、 Given a matrix of m x n elements (m rows, n columns), return all elements of the matrix in ZigZag-order. Given a matrix: return [1, 2, 5, 9, 6, 3, 阅读全文