摘要： A robot is located at the top-left corner of a m x n grid (marked 'Start' in the diagram below).The robot can only move either down or right at any po 阅读全文

摘要： Given a linked list, rotate the list to the right by k places, where k is non-negative. Example 1: Example 2:Input: 0->1->2->NULL, k = 4 Output: 2->0- 阅读全文