Spiral and Zigzag

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[LeetCode] 虽然感觉spiral matrix 两道题和 zigzag conversion 那道题没有太多联系,但是,毕竟都是相当于数学上的找规律题目. 这种优雅的题目就应该用下面这种优雅的代码写法. 054 Spiral Matrix /* Given a matrix of m x n elements (m rows, n columns), return all elements of the matrix in spiral order. For example, Give…

Pramp mock interview (4th practice): Matrix Spiral Print

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[LeetCode] Zigzag Iterator 之字形迭代器

Given two 1d vectors, implement an iterator to return their elements alternately. For example, given two 1d vectors: v1 = [1, 2] v2 = [3, 4, 5, 6] By calling next repeatedly until hasNext returns false, the order of elements returned by next should b…

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[LeetCode] Spiral Matrix II 螺旋矩阵之二

Given an integer n, generate a square matrix filled with elements from 1 to n2 in spiral order. For example,Given n = 3, You should return the following matrix: [ [ 1, 2, 3 ], [ 8, 9, 4 ], [ 7, 6, 5 ] ] 此题跟之前那道Spiral Matrix 螺旋矩阵本质上没什么区别,就相当于个类似逆运算的过…

[LeetCode] Spiral Matrix 螺旋矩阵

Given a matrix of m x n elements (m rows, n columns), return all elements of the matrix in spiral order. For example,Given the following matrix: [ [ 1, 2, 3 ], [ 4, 5, 6 ], [ 7, 8, 9 ] ] You should return [1,2,3,6,9,8,7,4,5]. 这道题让我们将一个矩阵按照螺旋顺序打印出来,我们…