IncredibleThings

摘要： 用 stack 完美契合 阅读全文

摘要： Given an input string, reverse the string word by word. A word is defined as a sequence of non-space characters. The input string does not contain lea 阅读全文

摘要： Given an array, rotate the array to the right by k steps, where k is non-negative. Example 1: Example 2: Note: Try to come up as many solutions as you 阅读全文

摘要： Given a positive integer n, generate a square matrix filled with elements from 1 to n2 in spiral order. Example: Input: 3 Output: [ [ 1, 2, 3 ], [ 8, 阅读全文

摘要： Given a matrix of m x n elements (m rows, n columns), return all elements of the matrix in spiral order. Example 1: Example 2: 复杂度 时间 O(NM) 空间 O(1) 思路 阅读全文