HCacm的专栏

Discription You are given an n x n 2D matrix representing an image.Rotate the image by 90 degrees (clockwise).Note: You have to rotate the image in-place, which means you have to modify the input 2D m

相关问题Discription Given a linked list, swap every two adjacent nodes and return its head.For example, Given 1->2->3->4, you should return the list as 2->1->4->3.Your algorithm should use only constant s

相关问题24. Swap Nodes in Pairs 25. Reverse Nodes in k-GroupDiscription Given a linked list, reverse the nodes of a linked list k at a time and return its modified list.k is a positive integer and is less